JP7623890B2 - How to build structures - Google Patents

Description

This invention relates to a method for constructing a structure when there are restrictions above the proposed construction site.

There is a known method for constructing a high-rise building on a narrow site (see Patent Document 1, etc.).

JP 2017-179834 A

The building construction method disclosed in Patent Document 1 discloses a method for constructing a steel frame structure on the ground on a narrow site.
However, when there is a restriction above the site where the structure is to be constructed, there is a problem that when heavy machinery such as a crane is used to construct the structure at the site, there is a possibility that the structure will interfere with the upper restriction.
In consideration of the above-mentioned problems, the present invention provides a method for constructing a structure, which enables a structure to be constructed at a site where a structure is to be constructed without interfering with the upper restriction when there is a restriction above the site where the structure is to be constructed.

The method for constructing a structure according to the present invention is a method for constructing a structure when there is a restriction above the planned structure construction site, and is characterized by comprising: a first step of constructing a structure in an adjacent location adjacent to the planned structure construction site where there is no restriction above, so as to be movable laterally to the planned structure construction site; a second step of constructing the structure on the planned structure construction site by moving the structure configured to be movable laterally from the adjacent location to the planned structure construction site ; a restricted area setting step of setting a safe separation distance around the restriction and setting an alarm output boundary using a range measurement sensor at a position further away from the restriction than the safe separation distance; and a structure design step of designing a structure to be constructed on the planned structure construction site, the structure having a height lower than the vertical distance from the lowest end position of the alarm output boundary to the ground of the planned structure construction site, so that when there is a restriction above the planned structure construction site, the structure can be constructed on the planned structure construction site so as not to interfere with the upper restriction. Also, a structure can be constructed that utilizes the area under the restriction to the very limit. In other words, a structure up to the maximum height can be safely and easily constructed within the restrictions of the planned structure construction site.
In addition, the structure is constructed by combining a number of divided structures, and is characterized in that in a first step, the divided structures are configured to be able to move laterally one by one, and in a second step, a structure composed of the multiple divided structures combined is constructed.Therefore, in cases where there is a restriction above the planned site for constructing the structure, it is possible to construct a large structure that is a combination of a number of divided structures at the planned site for constructing the structure without interfering with the upper restriction.
The method is also characterized in that one divided structure constructed at an adjacent location is moved a predetermined distance from the adjacent location toward the planned structure construction site, and then another divided structure is constructed at the adjacent location, and the other divided structure constructed at the adjacent location is combined with the one divided structure moved a predetermined distance from the adjacent location toward the planned structure construction site, and then the structure formed by combining these multiple divided structures is moved together to the planned structure construction site, thereby constructing the structure at the planned structure construction site.
Also, in the first step, a steel frame structure is configured to be laterally movable as a structure including a plurality of columns arranged at a predetermined interval, beams provided between adjacent columns and connected at both ends to the columns, and deck plates provided between adjacent beams and connected to these beams. That is, after the work of assembling the columns, beams, and deck plates to configure a laterally movable steel frame structure is performed using heavy machinery such as a crane in an adjacent location with no upper limit, the laterally movable steel frame structure can be laterally moved to the planned structure construction site, so that the structure can be constructed at the planned structure construction site without using heavy machinery or the like.
In addition, the method includes a column formation step in which the columns of the steel structure are formed by dividing them into a lower column end portion and a main column portion, and in a first step, the main column portions are provided at adjacent locations and a beam is assembled between each of these adjacent main column portions to form a steel structure that can be moved laterally, and in a second step, a lateral movement path is formed that extends along the direction of movement in which the structure is moved, and each main column portion of the steel structure that has been moved laterally from the adjacent location to the planned structure construction site along the lateral movement path is fixed to each lower column end portion fixed to the column foundation at the planned structure construction site, thereby constructing a steel structure at the planned structure construction site, thereby providing a method for constructing a steel structure with excellent workability .

FIG. 1 is a perspective view showing an outline of a construction method for a steel structure (first embodiment, example). FIG. 1 is a plan view showing an outline of a construction method for a steel structure (first embodiment, example). FIG. 1 is a side view showing an outline of a construction method for a steel structure (first embodiment, example). FIG. 13 is a side view showing a pillar formed separately into a lower end portion and a main portion of the pillar (embodiment example). Cross-sectional view of the lower end portion and main portion of the pillar (embodiment example). FIG. 4 is a cross-sectional view showing the structure of the lower end of the main pillar part (embodiment example). A diagram showing the underside and recess of the bottom plate provided at the lower end of the main part of the column (embodiment). FIG. 1 is a diagram showing an example of a construction procedure of a steel structure construction method (embodiment); FIG. 1 is a diagram showing an example of a construction procedure of a steel structure construction method (embodiment); FIG. 1 is a diagram showing an example of a construction procedure of a steel structure construction method (embodiment); FIG. 13 is a perspective view showing a state in which the main part of the pillar is moved by a power applying means (embodiment); FIG. 13 is a perspective view showing a state in which the main part of the pillar is moved up and down by a vertical movement means (embodiment); FIG. 11 is a plan view showing an outline of a construction method for a steel structure (second embodiment). FIG. 11 is a side view showing an outline of a construction method for a steel structure (embodiment 2).

EMBODIMENT 1
The method for constructing a structure according to the first embodiment is a method for constructing a structure when there is a restriction (e.g., a high-voltage power line X) above a planned construction site (end point E of movement), such as a planned construction site, as shown in Figures 1 to 3, and is a method that includes a pre-planning step and a construction step, as described below.
First, as a pre-planning step, a restriction area setting step is provided in which a safety isolation distance is set around the limit, and an alarm output boundary is set at a position further away from the limit than the safety isolation distance, and a structure design step is provided in which a structure to be constructed at the planned structure construction site is designed to have a height that is lower than the vertical distance from the lowest point of the alarm output boundary to the ground at the planned structure construction site.
The construction steps include a first step of configuring a structure to be movable laterally to the planned structure construction site at an adjacent location (movement starting point S) adjacent to the planned structure construction site and with no upward restrictions, and a second step of moving the structure configured to be laterally movable laterally from the adjacent location to the planned structure construction site to construct the structure (e.g., steel structure 2) at the planned structure construction site.
In the second step, for example, a structure that is configured to be laterally movable is moved from an adjacent location to the planned structure construction site using a lateral movement means, and the structure is then constructed at the planned structure construction site by fixing the structure to a foundation provided at the planned structure construction site using fixing means such as bolting or welding.
According to the method for constructing a structure of embodiment 1, even if there are restrictions above the site where the structure is to be constructed, it is possible to safely and easily construct a structure that makes maximum use of the space above the site where the structure is to be constructed so as not to interfere with the restrictions above the site where the structure is to be constructed.
For example, as shown in Figures 1 to 3, in the case where the upper limit of the planned structure construction site (movement end point E) is the high-voltage power line X, first, in the restricted area setting step, a safety separation distance is set around the high-voltage power line X. That is, a safety separation boundary line Y is set around the high-voltage power line X at a position away from the high-voltage power line X by the safety separation distance. Furthermore, an alarm output boundary line Z indicating an alarm output boundary is set at a position further away from the high-voltage power line X than the safety separation distance. The alarm output boundary line Z is set, for example, using a range sensor such as a laser scanner. In this case, for example, the safety separation boundary line Y is set at a position 4 m from the high-voltage power line X, and the alarm output boundary line Z is set at a position 6 m from the high-voltage power line X.
Next, in the structure design step, a structure to be constructed at the planned structure construction site is designed to have a height that is lower than the vertical distance from the lowest point of the alarm output boundary to the ground at the planned structure construction site.
In a first step, a structure is configured to be able to move laterally to the planned construction site at an adjacent location adjacent to the planned construction site and having no high-voltage power lines X above as a restriction, and in a second step, the structure configured to be able to move laterally at the adjacent location having no high-voltage power lines X above is moved laterally from the adjacent location to the planned construction site, and a structure (e.g., steel structure 2) is constructed at the planned construction site.
According to this method for constructing a structure, even if there is a high-voltage power line X above the planned construction site of the structure, the structure can be constructed by utilizing the area below the high-voltage power line X to the maximum extent possible so as not to interfere with the high-voltage power line X.
In particular, a restricted area is set in advance, and the structure is designed based on this restricted area so as not to interfere with the high-voltage power line X. This makes it possible to move a structure configured to be laterally movable in an adjacent location with no high-voltage power line X above it to the planned structure construction site so as not to interfere with the high-voltage power line X above the planned structure construction site, thereby making it possible to safely and easily construct a structure up to the maximum height limit below the high-voltage power line X at the planned structure construction site.
Hereinafter, an embodiment of a method for constructing a steel frame structure when constructing a steel frame structure as a structure on a planned construction site will be described with reference to Figs.

An embodiment will be described with reference to FIGS.
The steel structure construction method of the embodiment includes a movement range setting step, a column forming step, a movement start point side step, a steel structure moving step, and a movement end point side step.
The movement range setting step is a step of setting a movement start point S and a movement end point E on the planned construction site 1, as shown in FIG.
1 and 2, the position where a lateral movement path 7, which will be described later, is provided is indicated by a two-dot chain line, and the position where a guide rail 8, which is installed parallel to the lateral movement path 7, is provided is indicated by a one-dot chain line.
In the column formation step, as shown in FIG. 4 , a column (steel column) 3 is formed by dividing it into a column lower end portion 4 and a column main portion 5 .
In other words, in the column formation step, the column 3 constituting the steel structure 2S assembled at the start point S of the movement, or the column 3 constituting the steel structure 2 constructed at the end point E of the movement, is formed by dividing it into the column lower end portion 4 and the column main portion 5.
That is, in the construction method for a steel frame structure according to the embodiment, a column 3 formed separately into a lower end portion 4 and a main portion 5 is used.
In other words, the construction method for a steel structure of the embodiment is realized by using a column 3 having a lower end portion 4 and a main portion 5 connected to the lower end portion 4.
The step on the movement start point side is a step in which, at the movement start point S, a column main part 5 is provided on top of each column lower end part 4 attached to each column foundation 10, and a steel structure 2S is assembled by assembling reinforcing beams (steel reinforcing beams) 6 and beams (steel beams) 61 between each adjacent column main part 5, 5, to form a movable steel structure 2M (see Figures 1(b), 2(a), and 3(a)).
The steel structure moving step is a step in which a steel structure 2M configured to be movable at the movement start point side step is moved laterally from the movement start point S to the movement end point E, as shown in Figure 9 (c).
The movement end point side step is a step of constructing a steel structure 2 fixed to the column foundations 10, 10... at the movement end point E by fixing each of the column main parts 5, 5... of the steel structure 2M that has been moved laterally to each of the column lower ends 4, 4... fixed to the column foundations 10, 10... at the movement end point E, as shown in Figure 10 (c) (see Figures 1 (c), 2 (b), and 3 (b)).

In the construction method for the steel frame structure, after setting a start point S and an end point E of movement on a planned construction site 1, first, independent column foundations 10, 10... are constructed on the ground G at the start point S and the end point E of movement as shown in Fig. 8(a), and a reinforced concrete floor F of the ground floor is constructed between each adjacent column foundation 10, 10.... The reinforced concrete floor F is constructed, for example, as shown in Fig. 8(a), by backfilling the soil J and then pouring concrete on the soil J, or by pouring concrete into a slab formwork not shown.
The start point S of the movement is a location where a temporary steel structure 2S is assembled on column foundations 10, 10... provided at the start point S of the movement, and configured into a movable steel structure 2M, which is then moved to the end point E of the movement.
In addition, the end point E of movement is the end point of movement of the steel structure 2M moved from the starting point S, and is the location where the desired steel structure 2 is constructed by fixing the moved steel structure 2M to the column foundations 10, 10....

As shown in Figure 8 (a), the column foundation 10 is composed of a column base base 20 provided in a foundation concrete pouring space formed by being surrounded by a formwork not shown in the figure, reinforcement not shown in the figure assembled in the foundation concrete pouring space, and foundation concrete 30 which is concrete poured in the foundation concrete pouring space and solidified.
The column base 20 is composed of a concrete section (waste concrete) 21 provided at the bottom of the foundation concrete pouring space, a set frame 23 fixed to the concrete section 21 with anchors 22, a plurality of anchor bolts 24, 24... attached to the set frame 23 and extending upward, and a gauge plate 25 fixed to the upper ends of the plurality of anchor bolts 24, 24... with nuts not shown.
Then, concrete is poured into the foundation concrete pouring space to form the foundation concrete 30, and the upper ends of the multiple anchor bolts 24, 24... are configured to protrude above the upper end surface 30t of the foundation concrete 30 (see Figure 8 (b) and Figure 4).

The column lower end 4 is a hollow, short, square column made of metal such as steel and having a U-shaped cross-section, and is equipped at its lower end with a base plate 41 fixed to the column foundation 10, and at its upper end with a fixing surface 42 to which the lower end of the column main part 5 is fixed.
5, the column lower end 4 is configured with a hollow short rectangular column 4B with upper and lower ends (both ends) open, which is made by combining four flat steel plates 4A, 4A..., a base plate 41 made of a flat steel plate having a rectangular plate surface larger than the cross-sectional area of the opening at the lower end of the rectangular column 4B and provided to close the opening at the lower end of the rectangular column 4B, and an upper end side plate 43 made of a flat steel plate having a rectangular plate surface larger than the cross-sectional area of the opening at the upper end of the rectangular column 4B and provided to close the opening at the upper end of the rectangular column 4B. In this case, the fixing surface 42 of the column lower end 4 is formed by the plate surface that becomes the upper surface of the upper end side base plate 43.
In addition, for example, the opening edge of the lower end of the rectangular pillar 4B is welded to the plate surface that becomes the upper surface of the base plate 41 so that the central axis of the rectangular pillar 4B coincides with the center of the rectangular plate surface of the base plate 41, and the opening edge of the upper end of the rectangular pillar 4B is welded to the plate surface that becomes the lower surface of the upper end plate 43 so that the central axis of the rectangular pillar 4B coincides with the center of the rectangular plate surface of the upper end plate 43, thereby forming the column lower end portion 4.
In addition, for example, in a factory or the like, an erection piece (erection piece) 44 is attached by welding to each of the four side surfaces that form the peripheral surface near the upper end of the square column 4B at the lower end portion 4 of the column.

The main column part 5 is a hollow rectangular column made of metal such as steel that is longer than the lower column end part 4 and, as shown in Figures 6 and 7, is configured with a bottom plate 51 at its lower end that has a lower surface 52 and a recess 55 that is recessed upward from the lower surface 52.
Like the column lower end portion 4, the column main portion 5 is configured, for example as shown in FIG. 5, by combining four flat steel plates 5A, 5A... to form a long, hollow rectangular column 5B with open upper and lower ends (both ends), and a bottom plate 51 made of a steel plate having a rectangular plate surface of a size corresponding to the cross-sectional area of the opening at the lower end of the rectangular column 5B and arranged to close the opening at the lower end of the rectangular column 5B.
In addition, for example, the rectangular column 5B and the bottom plate 51 are welded together to form the main column part 5, with the bottom plate 51 fitted into the inside of the opening at the lower end of the rectangular column 5B so that the central axis of the rectangular column 5B coincides with the center of the rectangular plate surface of the bottom plate 51.
As shown in Fig. 4, a diaphragm 53 protruding from the peripheral surface of the lower end side of the rectangular column 5B of the column main part 5 is provided, and the reinforcing beam 6 is joined to the diaphragm 53. The diaphragm 53 is preferably configured as a through diaphragm.
That is, the column main portion 5 is a steel column having the above-mentioned bottom plate 51 provided at the lower end side of a normal steel column.
In addition, for example, in a factory or the like, erection pieces (erection pieces) 54 are attached by welding to each of the four side surfaces that form the peripheral surface near the lower end of the rectangular column 5B of the column main part 5.

6 and 7, the recess 55 formed on the plate surface that becomes the lower surface 52 of the bottom plate 51 has a rear wall 56B, a left wall 56L, and a right wall 56R located on the rear side (left side in FIG. 6) and both left and right sides (both sides in the direction perpendicular to the paper surface of FIG. 6 and the top and bottom sides in FIG. 7) in the moving direction M of the main column part 5, and is also provided with a front opening 57 that is open on the front side in the moving direction M of the main column part 5. The moving direction M of the main column part 5 refers to the moving direction of the main column part 5 when a steel structure 2M that is configured to be laterally movable is moved.
In addition, at the boundary portion between the bottom surface 58 of the recess 55 and the rear side wall 56B, left side wall 56L, and right side wall 56R of the recess 55, a groove portion 59 is formed to avoid contact between a corner (hereinafter referred to as a "boundary corner") 93 which is the boundary between the rear side surface 91, left side surface, and top surface 92 of a friction reduction plate 9 as a friction reduction material described later, and a corner (hereinafter referred to as a "boundary corner") which is the boundary between the bottom surface 58 of the recess 55 and the rear side wall 56B, left side wall 56L, and right side wall 56R.
For example, as shown in FIG. 7 , the bottom surface 58 of the recess 55 is provided with a narrow groove portion 59 formed to extend beyond and along the boundary line between the bottom surface 58 of the recess 55 and the rear side wall 56B, left side wall 56L, and right side wall 56R of the recess 55, i.e., the narrow groove portion 59 is recessed further upward than the bottom surface 58 along the periphery of the bottom surface 58 of the recess 55.
In other words, in order to avoid contact between the peripheral boundary corner 93 of the upper surface 92 of the friction reduction plate 9 and the peripheral boundary corner of the bottom surface 58 of the recess 55, and to form a good surface contact state between the rear side surface 91 of the friction reduction plate 9 and the rear wall 56B of the recess 51, the groove portion 59 is provided in the recess 55.

In addition, the size of the lower surface 52 of the bottom plate 51 which forms the lower surface of the column main part 5 is configured to be smaller than the size of the fixing surface 42 which forms the upper surface of the column lower end part 4.
In this way, by making the size of the underside 52 of the column main part 5 smaller than the size of the fixed surface 42 of the column lower end part 4, when welding the outer periphery of the underside 52 of the column main part 5 to the fixed surface 42 of the column lower end part 4 as described below, even if the underside 52 of the column main part 5 is not accurately positioned at a predetermined position on the fixed surface 42 of the column lower end part 4, as long as the entire underside 52 of the column main part 5 is positioned on the fixed surface 42 of the column lower end part 4, it is possible to weld and fix the outer periphery of the underside 52 of the column main part 5 to the fixed surface 42 of the column lower end part 4, which makes it easier to position the underside 52 of the column main part 5 relative to the fixed surface 42 of the column lower end part 4 when moving the column main part 5.

At the movement end point E, the lower end portions 4, 4 . . . are fixed in advance to the respective column bases 10, 10 .
That is, at the end point E of the movement, after a base mortar 26 is laid on the foundation concrete 30 of the column foundation 10, after a predetermined time has elapsed, a construction device not shown is used to adjust the distance between the base plate 41 of the column lower end 4, which is temporarily fixed to the anchor bolts 24, 24..., and the foundation concrete 30 to correct the erection distortion of the column lower end 4 (adjusting the verticality of the column lower end 4), and then a nut 28 is fastened to the anchor bolt 24 via a washer 27 to perform the final tightening work of fixing the base plate 41 of the column lower end 4 to the anchor bolt 24 of the column foundation 10, thereby fixing the column lower end 4 to the column foundation 10.
Any type of construction device may be used as long as it is capable of correcting the insertion distortion of the lower end portion 4 of the column.

More specifically, the movement start side step includes a steel structure assembly step and a steel structure movement preparation step.

In the steel structure assembly step, the main column parts 5, 5... are removably attached to the lower column ends 4, 4... attached to the column foundations 10, 10... of the movement starting point S, and the steel structure 2S is assembled with the reinforcing beams 6, 61 assembled between the adjacent main column parts 5, 5 that are removably attached.

In the steel frame structure assembly step, first, the lower end portions 4 of the columns are placed on the respective column foundations 10, 10 . . . formed at the movement starting point S.
At the movement start point S, as shown in Fig. 8(a), after forming the foundation concrete 30 of the column foundation 10, as shown in Fig. 8(b), the gauge plate 25 of the column base 20 is removed, and the base mortar 26 is provided on the foundation concrete 30, and then the upper end side of the anchor bolt 24 is inserted through the through hole 45 formed in the base plate 41 of the column lower end 4, and the base plate 41 of the column lower end 4 is installed on the foundation concrete 30 of the column foundation 10 via the base mortar 26 (see Fig. 4). In other words, the base plate 41 of the column lower end 4 is temporarily fixed to the anchor bolt 24 of the column foundation 10 by temporarily fastening the nut 28 to the anchor bolt 24 via the washer 27.
That is, at the starting point S of the movement, the lower end portions 4, 4... of the columns are temporarily fixed to each of the column foundations 10, 10..., and the main column parts 5, 5... are removably attached to the lower end portions 4, 4... of the columns temporarily fixed to each of the column foundations 10, 10.... After assembling the steel structure 2S, a nut 28 is fastened to the anchor bolt 24 via a washer 27, and the base plate 41 of the lower end portion 4 of the column is fixed to the anchor bolt 24 of the column foundation 10, thereby fixing the lower end portion 4 to the column foundation 10.

The installation work for removably attaching the main column part 5 to the lower column end part 4 is preferably performed using an erection device 11 that is removably attached to the lower column end part 4 and the main column part 5 and that can perform erection adjustments such as adjusting the misalignment, level, and tilt between the lower column end part 4 and the main column part 5.

In addition, in the steel structure assembly step, construction work is carried out using a construction device 11 that is removably attached to the column lower end portion 4 and the column main portion 5 in order to removably attach the column lower end portion 4 and the column main portion 5, and the construction device not shown in the figure described above.
In other words, it is preferable to use these construction devices 11 and the construction device not shown in the figure described above to perform the work of correcting the erection distortion (adjusting the verticality) of the column 3 composed of the column lower end portion 4 and the column main portion 5, while assembling the reinforcing beams 6, 61 between the column main portions 5, 5 of adjacent columns 3, 3, thereby assembling the steel structure 2S at the starting point S of the movement.

In other words, as the construction device not shown in the figure, it is sufficient to use a construction device that can correct the insertion distortion (adjust the verticality) of the lower end portion 4 of the column or the column 3 relative to the column foundation 10.
Furthermore, as the above-mentioned construction device 11, a construction device capable of performing construction adjustments such as adjusting the misalignment, level adjustment, and tilt adjustment between the column lower end portion 4 and the column main portion 5, i.e., construction adjustment of the column main portion 5 relative to the column lower end portion 4, may be used.

The construction work of the steel structure 2S at the movement starting point S is carried out, for example, with each of the column main parts 5, 5 . . . for one section removably attached to each of the column lower end parts 4, 4 .
That is, a reinforcing beam 6 is assembled between the lower ends of adjacent column main parts 5, 5. Then, beams 61 are assembled to the adjacent column main parts 5, 5 at the beam insertion positions supporting the second floor, and a deck plate 62 is laid between the beams 61, 61. The second joint column is then connected, and a beam 61 is assembled to the beam insertion position supporting the third floor, and a deck plate 62 is laid between the beams 61, 61. A beam 61 is also assembled to the beam insertion position supporting the rooftop floor, and a deck plate 62 is laid between the beams 61, 61. Although FIG. 1 illustrates a steel structure 2S for constructing a three-story steel-framed building, the number of floors may be determined arbitrarily.
In this way, the construction method for a steel structure of the embodiment is realized by using a steel structure including columns 3 each formed by connecting the column lower end portion 4 and the column main portion 5, and beams 61 and deck plates 62 connected to adjacent columns 3. The steel structure may be configured to include at least the beams 61 described above as beams.
In the first step of configuring a steel structure as a structure from a movement start point S (an adjacent place adjacent to the planned structure construction site with no upward restrictions) to be laterally movable to a movement end point E (planned structure construction site), a steel structure is configured to be laterally movable, the steel structure including each of the column main parts 5, 5... as a plurality of columns arranged at a predetermined interval, a beam 61 provided between each of the adjacent column main parts 5, 5... and connected at both ends to the column main parts 5, and a deck plate 62 provided between the adjacent beams 61, 61 and connected to these beams 61. That is, after the work of assembling the column main parts 5, the beams 61, and the deck plate 62 as columns to configure a laterally movable steel structure 2M is performed using heavy machinery such as a crane at the movement start point S, the laterally movable steel structure 2M can be moved laterally to the movement end point E, so that the steel structure 2M can be constructed at the movement end point E without using heavy machinery or the like.

The steel structure 2S constructed at the movement start point S, and the laterally movable steel structure 2M constructed at the movement start point S in the steel structure movement preparation step described below, are at least configured to be self-supporting.

In addition, in the construction method for the steel structure of the embodiment, a reinforcing beam 6 is attached between the lower ends of adjacent main column parts 5, 5 to create a steel structure, which not only reinforces the steel structure itself but also suppresses distortion and twisting of the steel structure when it is moved to the end point E of movement.

In the steel structure movement preparation step, the main column parts 5, 5... of the steel structure 2S assembled at the movement starting point S in the steel structure assembly step are removed from the lower column ends 4, 4... to form a steel structure 2M that can be moved laterally.
That is, after assembling a reinforced steel structure 2S at the starting point S of movement using the construction device 11, the construction device 11 is removed to remove each of the main column parts 5, 5... of the reinforced steel structure 2S from each of the lower column ends 4, 4... to form a reinforced steel structure 2M that can be moved laterally.

More specifically, the steel structure moving step includes a lateral movement path configuration step and a movement step.
In the lateral movement path constructing step, a lateral movement path 7 is constructed extending along the movement direction M between adjacent column main parts 5, 5 along the movement direction.
In the moving step, the steel structure 2M configured to be laterally movable is moved laterally from the movement start point S to the movement end point E via the lateral movement path 7.

Specifically, in the lateral movement path construction step, a movement path forming member extending along the movement direction M is installed between adjacent column lower ends 4, 4 along the movement direction M, and a lateral movement path 7 is constructed in which the upper surface of a smooth surface forming member 75 attached to the fixed surface 42 of the column lower end 4 fixed to the column foundation 10 and the upper surface of a smooth surface forming member 75 attached to the upper end surface of the movement path forming member form a road surface at the same horizontal level.

The travel path forming member is composed, for example, of a main rail material 70 installed between adjacent lower end portions 4, 4 of the columns along the travel direction M, and a column edge rail material 71 installed at the column edge of the lower end portion 4 of the columns.
The main rail material 70 and the column edge rail material 71 are made of, for example, H-shaped steel, and are configured so that one flange of the H-shaped steel is fixed to the reinforced concrete floor F between the lower end portions 4, 4 of the columns, and the outer surface of the other flange of the H-shaped steel becomes the upper end surface.
The movement path forming member is provided so as to be continuous along the movement direction M. For example, the movement path forming member is provided so as to be continuous in a straight line along the movement direction M, or is provided so as to be continuous in a curved line along the movement direction M.

In addition, in the lateral movement path construction step, a guide rail 8 is provided on the reinforced concrete floor F parallel to the lateral movement path 7, and a support means is provided that supports the steel structure 2M, which is configured to be able to move laterally, on the guide rail 8, so that the steel structure is configured to be able to move laterally while being guided by the guide rail 8.
As described above, the support means is composed of, for example, a support beam 65 extending from the reinforcing beam 6 toward the guide rail 8, and a guide roller 66 provided on the lower end side of the support beam 65 (see Figure 11).
The guide rail 8 is formed by using a shaped steel such as an H-shaped steel, and is fixed to the reinforced concrete floor F so that one flange of the H-shaped steel becomes a guide rail surface formed by a vertical plane.
Therefore, by configuring the guide rollers 66 to roll on the guide rail surface, the steel structure 2M can be moved smoothly and accurately in a straight line in the direction of movement M, thereby enabling the lateral movement of the steel structure 2M to be performed smoothly and accurately.

Then, in the movement step, a friction reduction plate 9 serving as a friction reduction material is placed in the recess 55 of the bottom plate 51 of the column main part 5 of the steel structure 2M configured to be able to move laterally, and the friction reduction plate 9 is caused to protrude below the underside 52 of the bottom plate 51. The steel structure 2M is then moved laterally to the end point E of movement while the friction reduction plate 9 is brought into contact with the road surface of the lateral movement path 7.
In other words, when the steel structure 2M, which is configured to be able to move laterally, moves, the friction reduction plate 9 is brought into contact with the road surface of the lateral movement path 7, and the steel structure 2M is moved in a non-contact state where the underside 52 of the bottom plate 51 of the column main part 5 of the steel structure 2M is not in contact with the road surface of the lateral movement path 7.
Therefore, by contact between the road surface of the lateral movement path 7, which is formed into a smooth surface by the smooth surface forming member 75, and the friction reduction plate 9, the frictional resistance during movement of the steel structure 2M can be reduced, making it possible to easily move the steel structure 2M laterally.

The friction reduction plate 9 may be a friction reduction plate made of a low-friction material such as monomer cast nylon (polyamide resin). The friction reduction plate 9 is made of a rectangular plate material. The length of the long side of the rectangular plate constituting the friction reduction plate 9 is longer than the length from the rear side wall 56B of the recess 55 to the front opening 57, the length of the short side of the rectangular plate is formed to correspond to the distance between the left side wall 56L and the right side wall 56R of the recess 55, and the height (plate thickness) of the rectangular plate is longer than the length from the bottom surface 58 of the recess 55 to the lower surface 52 of the bottom plate 51.
In other words, the recess 55 is formed by removing a portion of the underside 52 of the bottom plate 51, and has a rear wall 56B positioned rearward in the moving direction M of the column main part 5 and in contact with the rear side surface 91 of the friction reduction plate 9, and is formed with a front opening 57 that is open on the front side in the moving direction M, and the depth dimension of the recess 55 from the underside 52 to the bottom surface 58 of the bottom plate 51 is formed to be smaller than the plate thickness dimension of the friction reduction plate 9 inserted between the bottom surface 58 of the recess 55 and the road surface of the lateral movement path 7.

Then, in the moving step, when the friction reduction plate 9 is installed in the recess 55 of the column main part 5, the rear side surface 91 at one end of the friction reduction plate 9 is brought into contact with the rear wall 56B of the recess 55, and the front side surface 99 at the other end of the friction reduction plate 9 is made to protrude from the recess 55 through the front opening 57. That is, the rear end side surface 91 formed by one side surface between the short sides of the rectangular parallelepiped that forms the friction reduction plate 9 is brought into contact with the side wall 56B of the recess 55, and the front side surface side 99, which is the other side surface between the short sides of the rectangular parallelepiped, is installed in a state in which it protrudes outward from the recess 55 through the front opening 57 of the recess 55.
When the steel structure 2M is moved laterally in this state, the recess 55 has the above-mentioned groove portion 59, so that the rear side surface 91 of the friction reduction plate 9 and the rear wall 56B of the recess 55 can be in reliable surface contact, and the force applied to the bottom plate 51 can be reliably transmitted to the rear side surface 91 of the friction reduction plate 9 via the rear wall 56B of the recess 55, thereby allowing the steel structure 2M to be moved laterally more smoothly.
That is, when the steel structure 2M moves, force is reliably transmitted from the rear wall 56 of the recess 55 of the column main part 5 to the rear side surface 91 of the friction reduction plate 9, and the steel structure 2M and the friction reduction plate 9 move together, thereby reducing friction during lateral movement of the steel structure 2M. Furthermore, after the steel structure 2M has moved, when removing the friction reduction plate 9 from the recess 55 at the step on the movement end point side, the front side surface 99 protruding outward from the recess 55 can be held via the front opening 57, making it possible to easily remove the friction reduction plate 9 from the recess 55.

As shown in FIG. 12, the work of installing the friction reduction plate 9 in the recess 55 and the work of easily removing the friction reduction plate 9 from the recess 55 are performed with the main pillar part 5 moved upward using an up-down movement jack 15 as a vertical movement means.
In this case, by using reinforcing beams 6, 6 as support parts when lifting the reinforced steel structure with the up-and-down moving jack 15, as shown in Figure 12, the steel structure can be easily lifted with the up-and-down moving jack 15 and the burden on the steel structure when lifting it with the up-and-down moving jack 15 can be reduced.
In addition, in FIG. 12, reference numeral 16 denotes a height adjustment stand for adjusting the installation height of the vertically movable jack 15 .

In addition, in the movement step, the power for moving the steel structure 2M, which is configured to be laterally movable, laterally from the start point S to the end point E via the lateral movement path 7 can be, for example, the pressing force applied by a plurality of pressing jacks 13, 13... as power imparting means.
As shown in FIG. 11, the piston side of the pressing jack 13 is connected to a mounting piece 12 attached to the lower end of the side surface on the rear side in the direction of movement of the main column part 5, and a fixing device 14 provided on the cylinder side is fixed to a main rail material 70 or the like. Then, the piston is extended to apply a pressing force to the main column part 5 of the steel structure 2M.
For example, a pressure jack 13 as a power imparting means is installed on the rear side of each of the multiple main column parts 5, 5... of a steel structure 2M that is configured to be able to move laterally, and by driving these pressure jacks 13, 13..., the steel structure 2M is moved to the end point E of movement.

In the step on the movement end point side, the main column part 5 of the steel structure 2M that has been moved laterally to the movement end point E is moved upward using the up-down jack 15, and the friction reduction plate 9 is removed from the recess 55 of the bottom plate 51 of the main column part 5. In addition, the smooth surface forming member 75 attached to the fixed surface 42 that becomes the upper surface of the lower end part 4 of the column is removed. Then, a metal plate, for example a steel plate 51A (see Figures 10 (b) and (c)) is installed in the recess 55 from which the friction reduction plate 9 has been removed, and the outer periphery of the lower surface 52 of the main column part 5 is welded and joined to the fixed surface 42 that becomes the upper end surface of the lower end part 4 of the column. Furthermore, on the front opening 57 side of the recess 55, the steel plate 51A and the fixed surface 42 of the lower end part 4 of the column are welded and joined, and the steel plate 51A and the bottom plate 51 of the main column part 5 are welded and joined, thereby constructing the steel structure 2 at the movement end point E.
The steel plate 51A used has a thickness dimension that is the same as the depth dimension of the recess 55 from the lower surface 52 of the column main part 5 to the bottom surface 58 of the recess 55.

After the welding work is completed, the reinforcing beams 6 and supporting beams 65 are removed from the steel structure 2 (see FIG. 10(c)). The removed reinforcing beams 6 and supporting beams 65 can be reused in other parts of the steel structure 2, or when constructing a steel structure other than the steel structure 2, which is preferable because it allows for effective use of the reinforcing beams 6 and supporting beams 65, i.e., effective use of resources.

Then, a steel-frame building is constructed by constructing, for example, exterior walls, floor slabs, and interior decoration on the steel-frame structure 2 (see Figures 1(c), 2(b), and 3(b)) constructed at the end point E of the movement.

An example of a construction procedure according to the steel frame structure construction method of the embodiment will be described below with reference to Figs.
First, as shown in Figure 8(a), column foundations 10, 10... are constructed at a movement start point S and a movement end point E at a planned construction site 1 in accordance with the spacing (span) of columns 3, 3 of a steel frame structure 2 to be constructed, and a reinforced concrete floor F is constructed between the column foundations 10, 10.... If the movement start point S and the movement end point E are separated from each other, it is sufficient to construct the column foundations 10, 10... and the reinforced concrete floor F between the movement start point S and the movement end point E as well.
8(b), the lower end portions 4 of the columns are temporarily fixed to the respective column foundations 10, 10 of the movement starting point S. At this time, a smooth surface forming member 75 such as a stainless steel sheet is attached to the fixing surface 42 of the lower end portions 4 of the columns.
8(c), the construction device 11 is installed to removably attach the column main parts 5, 5 to the lower end parts 4, 4, and an unillustrated construction device is installed on the lower end part 4 side of the column to assemble the column 3. While correcting the erection distortion of the column 3 (adjusting the verticality), the reinforcing beam 6 is assembled between the lower end sides of the column main parts 5, 5 of adjacent columns 3, 3. After the assembly of the reinforcing beam 6 is completed, the beams 61 of the second floor are assembled and the deck plate 62 of the second floor is laid. Then, the beams 61 for the desired number of floors are assembled and the deck plate 62 is laid, and the desired steel structure 2S is constructed at the movement start point S.
Before constructing the steel frame structure 2S, the main rail material 70 is installed on the reinforced concrete floor F between the lower end portions 4, 4 of the columns adjacent to each other along the moving direction M, and the column-side rail material 71 is installed on the reinforced concrete floor F at the column-side of the lower end portion 4 of the column. In this case, as shown in Figures 8(c) and 9(a), the main rail material 70 may be installed first and then the column-side rail material 71, or conversely, the column-side rail material 71 may be installed first and then the main rail material 70.
At this time, smooth surface forming members 75 such as stainless steel sheets are attached in advance to the upper end surfaces 74 of the main rail material 70 and the upper end surfaces 74 of the column-side rail material 71. That is, in order to reduce friction when the movable steel structure 2M is moved later, smooth surface forming members 75 such as stainless steel sheets are attached to the fixed surfaces 42 of the column lower ends 4, and similarly, smooth surface forming members 75 such as stainless steel sheets are also attached to the upper end surfaces 74 of the main rail material 70 and the upper end surfaces 74 of the column-side rail material 71.
Once the steel structure 2S has been constructed at the movement start point S, as shown in Fig. 9(a), the construction device 11 and other construction devices not shown are removed to construct a movable steel structure 2M at the movement start point S. Then, the vertically movable jack 15 is used to move the main column part 5 upward (slightly lift it up) and a friction reduction plate 9 is installed between the recess 55 in the bottom plate 51 of the main column part 5 and the smooth surface forming member 75 attached to the fixed surface 42 of the lower end part 4 of the column, and then the vertically movable jack 15 is lowered to lower the main column part 5 (see Fig. 9(a)).
Then, a mounting piece 12 (see Figure 9(a)) for attaching one end of a pressing jack 13 is attached to the side surface located rearward in the direction of movement M at the lower end side of the pillar main part 5, and as shown in Figure 9(b), the other end of the pressing jack 13 is fixed to the lateral movement path 7 via a fixing device 14 to absorb the reaction force, and one end of the pressing jack 13 is fixed to the mounting piece 12.
For example, the mounting piece 12 is attached so as to be aligned next to the erection piece 54 .
11, for example, on each side surface located in the front-rear direction of the movement direction M at the lower end side of the column main part 5, one erection piece 54 is provided near the boundary between the adjacent left and right side surfaces, and on each side surface located in the left-right direction of the movement direction M at the lower end side of the column main part 5, one erection piece 54 is provided at the center of each side surface. In this case, as shown in FIG. 11, for example, on the side surface located on the rear side of the movement direction M at the lower end side of the column main part 5, the mounting piece 12 is provided so as to be located in the center between the left and right.
Also, as shown in Figure 11, for example, on each side surface located in the front-to-back direction of the movement direction M at the lower end portion 4 of the column, one construction piece 44 is provided near the boundary between the adjacent left and right side surfaces, and on each side surface located in the left-to-right direction of the movement direction M at the lower end portion 4 of the column, one construction piece 44 is provided in the center position of each side surface.
9(c), the pressing jack 13 is driven to extend the pressing jack 13 by one stroke, and the pressing jack 13 is rearranged each time the pressing jack 13 is pushed and moved in the moving direction M. In this manner, the pressing operation by the pressing jack 13 and the rearrangement of the pressing jack 13 are repeated, whereby the movable steel structure 2M is moved laterally to the moving end point E.
As shown in Figure 10 (a), the steel structure 2M is moved laterally to the end point E of movement, and then the column edge rail material 71 is removed. Then, the vertically movable jack 15 is used to move the column main part 5 upward (slightly lift it) to remove the friction reduction plate 9 from between the recess 55 in the bottom plate 51 of the column main part 5 and the fixed surface 42 of the column lower end 4, and the smooth surface forming member 75 attached to the fixed surface 42 of the column lower end 4 is removed. After that, the vertically movable jack 15 is lowered to lower the column main part 5.
Then, as shown in Figure 10 (a), the construction device 11 is reattached to the main column part 5 and the lower column end part 4 of the steel structure 2M that has been moved laterally to the end point E of movement, and the work of correcting the erection distortion of the lower column end part 4 and the main column part 5 is performed.
After the plumbing distortion correction work is performed, as shown in Fig. 10(b), the construction pieces 44, 54 are removed, and then the outer periphery of the lower surface 52 of the column main part 5 and the fixing surface 42 of the column lower end 4 are welded to fix the column main part 5 and the column lower end 4. In this case, as described above, a steel plate 51A is inserted between the recess 55 and the bottom surface 58 of the column main part 5 and the fixing surface 42 of the column lower end 4, for example, through the front opening 57 of the recess 55, and the steel plate 51A and the fixing surface 42 of the column lower end 4 are welded and joined on the front opening 57 side of the recess 55, and the steel plate 51A and the bottom plate 51 of the column main part 5 are welded and joined, so that the entire circumference of the outer periphery of the lower surface 52 of the column main part 5 can be reliably welded to the fixing surface 42 of the column lower end 4.
After the welding work is completed, as shown in Figure 10 (c), the reinforcing beams 6, support beams 65, and main rail material 70 are removed, thereby constructing the desired steel structure 2 with the columns 3 fixed to the column foundations 10, 10... at the end point E of the movement.

In an embodiment, for example, as shown in Figures 1 to 3, in the case where there is a high-voltage power line X as a restriction above the end point E of the movement as the planned construction site of the structure, a safety isolation boundary line Y is set around the high-voltage power line X at a position away from the high-voltage power line X by a safety isolation distance, and an alarm output boundary line Z indicating an alarm output boundary is set at a position even further away from the high-voltage power line X than the safety isolation distance, and then a steel structure is designed to be constructed at the end point E of the movement, with a height lower than the vertical distance from the lowest end position of the alarm output boundary to the ground at the end point E of the movement.
Then, at a start point S of movement, which is an adjacent location with no high-voltage power line X above, a steel structure is configured so as to be laterally movable to an end point E of movement, and the steel structure configured so as to be laterally movable is moved laterally from the start point S of movement to the end point E of movement to construct a steel structure 2 at the start point S of movement.
Therefore, according to the embodiment, a steel structure that is configured to be able to move laterally at the start point S of movement where there is no high-voltage wire X above as a restriction can be moved laterally to the end point E of movement without interfering with the high-voltage wire X above the end point E of movement, so that a steel structure 2 of up to the maximum height limit below the high-voltage wire X can be safely and easily constructed at the end point E of movement.

In the embodiment, in the lateral movement path forming step, a movement path forming member extending along the movement direction M is installed between the column lower ends 4, 4 adjacent to each other along the movement direction M, and the upper surface of the smooth surface forming member 75 attached to the fixed surface 42 of the column lower end 4 and the upper surface of the smooth surface forming member 75 attached to the upper end surface 74 of the movement path forming member are configured to be the same horizontal level road surface to form the lateral movement path 7, and in the movement step, a friction reduction plate 9 is installed in the recess 55 of the bottom plate 51 of the column main part 5 of the steel structure 2M configured to be able to move laterally, the friction reduction plate 9 is made to protrude below the lower surface 52 of the bottom plate 51, and the steel structure 2M is moved laterally to the movement end point E while the friction reduction plate 9 is in contact with the road surface of the lateral movement path 7. However, if the fixed surface 42 of the column lower end 4 itself and the upper end surface 74 of the movement path forming member itself are configured to function as a smooth road surface, there is no need to provide the above-mentioned smooth surface forming member 75.
That is, in the lateral movement path construction step, a movement path forming member extending along the movement direction M is installed between adjacent column lower ends 4, 4 along the movement direction M, and a lateral movement path 7 may be constructed in which the fixed surface 42 of the column lower end 4 fixed to the column foundation 10 and the upper end surface 74 of the movement path forming member form a road surface at the same horizontal level.

In the embodiment, a steel plate 51A is placed in the recess 55 from which the friction reduction plate 9 has been removed at the step on the movement end point side, and the steel plate 51A is welded and joined to the fixed surface 42 of the column lower end 4 at the front opening 57 of the recess 55, and the steel plate 51A is also welded and joined to the bottom plate 51 of the column main part 5. However, it is also possible not to place the steel plate 51A as a metal plate in the recess 55.

In the embodiment, the recess 55 formed in the bottom plate 51 of the main column part 5 has a rear wall 56B located on the rear side of the moving direction M of the main column part 5, and a front opening 57 that is open on the front side of the moving direction M of the main column part 5. However, the recess 55 formed in the bottom plate 51 of the main column part 5 may not be open on the front side of the moving direction M of the main column part 5. In other words, the recess 55 may be a recess that is open only on the lower surface 52 of the bottom plate 51 and not on the peripheral surface of the bottom plate 51, or a recess that is open on the left or right side or on the left and right sides other than the front and rear sides of the moving direction M of the main column part 5.

In addition, in the embodiment, a pressing jack (pressing means) 13 is used as the power applying means, but a towing jack (towing means) may also be used as the power applying means.

In the embodiment, the outer periphery of the lower surface 52 of the main column part 5 and the fixing surface 42 of the lower column end part 4 are welded together, i.e., the lower end of the main column part 52 of the steel frame structure is welded together with the upper end of the lower column end part 4, but a fixing method other than welding may be used.

In the embodiment, an example is shown in which a steel structure in which beams 6, 61 and a deck plate 62 are assembled between each of the main column parts 5, 5 is moved, but it is sufficient to move at least a steel structure in which beams 6, 61 are assembled between each of the main column parts 5, 5.

In addition, the erection distortion correction work described in the embodiment is preferably performed using the above-mentioned construction device, but the erection distortion correction work may also be performed using a fall prevention wire, etc.

According to the construction method of the steel structure realized by using the column 3 having the column lower end 4 and the column main part 5 connected to the column lower end 4 as in the embodiment, the column foundation 10 for attaching the column lower end 4 is constructed at the movement start point S, so that the construction work of assembling the steel structure 2S can be performed accurately at the movement start point S, and the work of constructing the laterally movable steel structure 2M can be performed safely. Furthermore, after the laterally movable steel structure 2M is moved to the movement end point E, the steel structure can be constructed at the movement start point S by utilizing the column lower ends 4, 4... fixed to the column foundations 10, 10... at the movement start point S.
In the embodiment, an example is shown in which a square pillar is used as the column lower end portion 4 and the column main portion 5 constituting the column (steel column) 3, but a pillar other than a square pillar, for example, a round pillar, a polygonal pillar, etc., may be used as the column lower end portion 4 and the column main portion 5 constituting the column 3.

In the embodiment, an example is shown in which the main column parts 5, 5... are removably attached to the lower column ends 4, 4... temporarily fixed to each column foundation 10, 10... at the start point S of movement, and then the steel structure 2S is assembled, and the lower column ends 4 are fixed to the column foundation 10. However, as with the end point E of movement, the lower column ends 4, 4... may be fixed to each column foundation 10, 10... formed at the start point S of movement by final tightening, and then the steel structure 2S may be assembled in a state in which the main column parts 5, 5... are removably attached to the lower column ends 4, 4... fixed to each column foundation 10, 10...

In addition, in the embodiment, an example is shown in which the column main part 5 is moved upward (slightly lifted) using the up-down moving jack 15 to install the friction reduction plate 9 between the recess 55 in the bottom plate 51 of the column main part 5 and the smooth surface forming member 75 attached to the fixed surface 42 of the column lower end part 4, but the friction reduction plate 9 may also be attached in advance to the bottom surface 58 of the recess 55 of the column main part 5 with adhesive tape or the like.
In addition, when providing the main column part 5 on the lower column end part 4 at the starting point S of movement, the friction reduction plate 9 may be placed on the smooth surface forming member 75 attached to the fixed surface 42 of the lower column end part 4, and then the main column part 5 may be provided on the lower column end part 4, thereby installing the friction reduction plate 9 between the smooth surface forming member 75, which forms the upper surface of the lower column end part 4, and the recess 55 of the main column part 5.

In the embodiment, the movement path forming member is divided into a main rail material 70 and a pillar edge rail material 71 that are installed between the lower ends 4, 4 of the adjacent pillars along the movement direction M, but the movement path forming member may be configured as a single rail material that is installed between the lower ends 4, 4 of the adjacent pillars along the movement direction M.

In the embodiment, the construction piece 44 is attached to the lower end 4 of the column in advance, and the construction piece 54 is attached to the lower end of the main column 5 in advance, and the mounting piece 12 is attached to the lower end of the main column 5 when the pressure jack 13 is installed. However, the construction pieces 44, 54 and the mounting piece 12 can be attached at any time. In short, the construction piece 44 is attached to the lower end 4 of the column by the time it is needed, and the construction piece 54 and the mounting piece 12 are attached to the lower end of the main column 5 by the time it is needed.

In the embodiment, the mounting pieces 12 are attached next to the construction pieces 54. However, if, for example, one construction piece 44 is provided in advance at the center of each side of the lower end 4 of the column, and one construction piece 54 is provided in advance at the center of each side of the lower end of the main column 5, the construction pieces 54 can be removed and the mounting pieces 12 can be attached, or the construction pieces 54 can be used as they are as mounting pieces for the pressure jack 13.

In the above embodiment, an example is shown in which column foundations 10, 10... are constructed at the start point S of movement, the lower end portions 4, 4... are attached to each of the constructed column foundations 10, 10..., main column parts 5, 5... are provided on the lower end portions 4, 4... attached to each of the column foundations 10, 10..., and a beam 61 is assembled between each of the adjacent main column parts 5, 5 to form a movable steel structure, but it is also possible not to provide the column foundations 10, 10... and the lower end portions 4, 4... at the start point S of movement.
For example, a rail material forming a movement path may be installed at the movement starting point S, and column main parts 5, 5... may be provided on a smooth surface forming member 75 attached to the upper surface of the rail material, and a beam 61 may be assembled between each of the adjacent column main parts 5, 5 to form a steel structure that is movable.
That is, the movement start point side step may be provided with a configuration required to enable each of the column main parts 5, 5... to stand on their own at the movement start point S, to construct a steel structure in which beams 61 are assembled between adjacent column main parts 5, 5..., and to enable the steel structure to be moved. In other words, the movement start point S may be provided with a configuration such as a platform and a road surface required for setting up and moving each of the column main parts 5, 5....

EMBODIMENT 2
The structure may be constructed by joining a number of divided structures, in which case in a first step the divided structures may be configured to be able to move laterally one by one, and in a second step the structure in which the multiple divided structures are joined may be constructed.
According to embodiment 2, when there is a restriction above the site where a structure is to be constructed, it is possible to construct a large structure that is a combination of multiple separate structures at the site where the structure is to be constructed without interfering with the upper restriction.
For example, as shown in Figs. 13 and 14, a steel structure 2 may be constructed by combining steel structure units 2X, 2Y, and 2Z as a plurality of divided structures.
In addition, in Figures 13 and 14, an example is shown in which a steel structure unit 2X constructed at the start point S of movement is moved two spans from the start point S of movement, a steel structure unit 2Y is constructed at the start point S of movement, the steel structure unit 2X and the steel structure unit 2Y are connected, and then the connected steel structure unit 2X and steel structure unit 2Y are moved together to the end point E of movement, but the steel structure unit 2X and the steel structure unit 2Y constructed at the start point S of movement may be moved one by one to the end point E of movement.
According to the second embodiment, as in the first embodiment, a steel structure 2 up to the maximum height limit below the high-voltage electrical wire X can be safely and easily constructed at the end point E of movement.
In addition, Figures 13 and 14 show an example in which a steel structure unit 2Z constructed at the start point S of the movement is combined with a steel structure unit 2Y constructed at the end point E of the movement, but it is also possible not to construct a steel structure unit 2Z at the start point S of the movement.

In the above, a method for constructing a steel structure using a column (steel column) formed separately into a lower end portion and a main portion has been described, but the present invention is naturally applicable to a method for constructing a steel structure using a normal steel column not formed separately into a lower end portion and a main portion.
For example, the present invention can be applied to a construction method for a steel structure using a conventional steel column, in which the lower end and main part of the column are integrated and there is no separation between the lower end and main part of the column, and a base plate is provided at the lower end of the column.
In this case, the lateral movement path may be a lateral movement path formed of a flat plate or the like having a smooth surface.

In other words, in the present invention, any method can be provided that includes a first step of constructing a steel structure in an adjacent location adjacent to the planned structure construction site where there are no upward restrictions, so that it can be moved laterally to the planned structure construction site, and a second step of moving the steel structure configured to be laterally movable laterally from the adjacent location to the planned structure construction site, to construct the steel structure at the planned structure construction site.
Furthermore, it is preferable to set a safety clearance distance around the upper limit of the site where the structure is to be constructed, and to set an alarm output boundary line at a position further away from the limit than the safety clearance distance, and to design the steel structure to be constructed at the site where the structure is to be constructed to have a height that is lower than the vertical distance from the lowest end of the alarm output boundary line to the ground at the site where the structure is to be constructed.This makes it possible to move the steel structure to the site where the structure is to be constructed so as not to interfere with the upper limit of the site where the structure is to be constructed, making it possible to construct the steel structure at the site where the structure is to be constructed safer and easier.

In the above, high-voltage power lines X are used as an example of a restriction above the site where the structure is to be constructed, but the restriction may be a restriction other than a high-voltage power line. For example, it may be an obstacle extending from a building adjacent to the site where the structure is to be constructed, or a height restriction around an airport. In other words, the present invention is also applicable to cases where, for example, a structure is configured to be movable laterally from an adjacent location that is not subject to a height restriction to a site where the structure is to be constructed, which has a height restriction around an airport, to the site where the structure is to be constructed, and then the structure configured to be movable laterally is moved laterally from the adjacent location to the site where the structure is to be constructed, which has a height restriction around the airport, to construct the structure on the site where the structure is to be constructed.

In the above, a steel frame structure is given as an example of a structure, but the structures that are the subject of the present invention may be structures other than steel frame structures, such as wooden structures and other structures.

2, 2S, 2M Steel structure (structure),
2X, 2Y, 2Z: Steel structure unit (divided structure), 3: Steel column, 4: Column lower end,
5 Main column part, 7 Horizontal movement path, 10 Column foundation, 61 Steel beam (beam),
62 Deck plate, S Movement start point (adjacent location),
E: End of movement (planned site for construction of structure), X: High-voltage power line (restriction), Y: Safety isolation boundary line,
Z Alarm output boundary.

Claims (5)

A method for constructing a structure when there is a restriction above a planned construction site for the structure, comprising the steps of:
A first step of configuring a structure to be laterally movable to a planned structure construction site in an adjacent location adjacent to the planned structure construction site and having no upward restrictions;
A second step of moving the structure configured to be laterally movable from the adjacent location to the planned structure construction site to construct the structure at the planned structure construction site;
a restriction area setting step of setting a safety distance around the restriction and setting an alarm output boundary at a position farther away from the restriction than the safety distance using a range finder;
a structure design step of designing a structure to be constructed at the planned structure construction site, the structure having a height lower than a vertical distance from the lowest end position of the alarm output boundary to the ground at the planned structure construction site;
A method for constructing a structure, comprising: The structure is a structure constructed by combining a plurality of divided structures,
In a first step, the divided structures are configured to be movable laterally one by one;
2. The method for constructing a structure according to claim 1, wherein in the second step, a structure is constructed in which a plurality of divided structures are joined together. A method for constructing a structure as described in claim 2, characterized in that one divided structure constructed at an adjacent location is moved a predetermined distance from the adjacent location toward the planned structure construction site, then another divided structure is constructed at the adjacent location, and the other divided structure constructed at the adjacent location is combined with the one divided structure moved a predetermined distance from the adjacent location toward the planned structure construction site, and then the structure formed by combining these multiple divided structures is moved together to the planned structure construction site, thereby constructing the structure at the planned structure construction site . A method for constructing a structure as described in any one of claims 1 to 3, characterized in that in the first step, a steel structure as a structure comprising a plurality of columns arranged at a predetermined interval , beams provided between adjacent columns and connected at both ends to the columns, and deck plates provided between adjacent beams and connected to these beams is configured to be laterally movable. The structure is a steel structure,
The method includes a column forming step of forming a column of a steel structure by dividing the column into a lower end portion and a main portion of the column,
In the first step, a steel structure is constructed so that it can be moved laterally, in which column main parts are provided at adjacent locations and beams are assembled between the adjacent column main parts;
The method for constructing a structure according to any one of claims 1 to 4, characterized in that in the second step, a lateral movement path is constructed extending along the movement direction in which the structure is moved, and a steel structure is constructed at the planned construction site by fixing each main part of a column of a steel structure that has been moved laterally from an adjacent location to the planned construction site along the lateral movement path to the lower end part of each column fixed to the column foundation at the planned construction site.

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