JP7430466B2 - Structure jacking equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a jack-down device installed at a temporary support point for supporting an assembled shed frame or the like in constructing a structure such as a workpiece or a shed frame of a building.

For example, as shown in Fig. 1, using the slide construction method, the wire rope is slid on the slide rails 6, 6 by the wire rope winding devices 7, 7, . When jacking down the entire shed frame 1 at once and placing the columns 5, 5, ... on the foundation columns 4, 4, ..., the temporary support points installed at the top of the shoring 2, 2, ... If the shed frame 1 supported by 3, 3, ... is long, the number of temporary support points 3, 3, ... will be very large, so equipment units such as hydraulic jacks should be installed at all of them. costs a lot of money.

Therefore, if the long integrated shed frame 1 is divided into several blocks 1a to 1f as shown in Fig. 2, and these blocks are jacked down in order, equipment units such as hydraulic jacks can be installed. It can be used repeatedly and is economical.

However, with this method, a gap is created in the height of the jacked-down block and the adjacent block before being jacked down, so if the amount of one jackdown is too large, the roof frame 1 will fall within the elastic range (deformation limit without damage). ) may be exceeded.

In order to avoid such a large deformation, it is necessary to reduce the amount of jacking in one go and gradually lower all the blocks in sequence over several times.

In that case, each time the jacking down of one block is completed, equipment units such as hydraulic jacks will be removed and relocated. A means is required to reliably maintain a predetermined height when temporarily receiving the block, and to control the height gap between adjacent blocks to a constant dimension.

As a prior art related to the jack-down method, for example, there is an invention described in Patent Document 1.

The invention described in Patent Document 1 is a method of lifting or lowering bridge girders and moving them laterally when expanding or elevating existing railway bridges or road bridges, and a lifting machine and a vent used for the method. This technology is related to members, and uses a multi-stage unit vent member installed between a bridge girder and the ground, and a pair of lifting machines installed on the ground. With the vent member supported from below, a unit vent member can be added or removed below it, and by repeating the adding and raising or removing and lowering in sequence, the bridge girder is lifted together with the vent member. The vent member can be lowered together with the vent member.

Further, the invention described in Patent Document 1 provides a structure in which, as described above, in a state where the plurality of stages of vent members are supported from below by the pair of hoisting machines, a bridge girder width direction is provided under the pair of hoisting machines. It is also disclosed to provide a lateral movement device for lateral movement on horizontal guide rails arranged in parallel.

The lifting machine has a built-in screw jack, and by rotating the screw rod using the lifting motor of the screw jack, the bridge girder can be raised and lowered together with the multi-stage bent members, and the bridge girder can be lifted on the ground. It is said to be able to perform lifting or lowering work, eliminating the need to work in narrow spaces at heights, and improving work efficiency.

This construction method is intended to be applied to large heavy structures such as bridge girders of railway bridges and road bridges, and the equipment required to raise and lower the structure is large-scale. It is difficult to apply this method to constructing long structures or building shed frames, which require a large number of structures. Further, there is no description that suggests how to avoid damage to the shed frame, etc., which is a problem when the shed frame etc., which have been assembled as one, is divided into a plurality of blocks and jacked down in sequence.

Patent No. 2563762

The present invention provides a method for jacking down a workpiece or a building's shed frame (hereinafter abbreviated as "shelf frame") that has been assembled into a plurality of blocks in order. Each time a block is jacked down (hereinafter simply referred to as lowering), when removing and relocating equipment units such as hydraulic jacks that were installed to support the block, it is necessary to The present invention provides a simple jack-down device that can reliably temporarily support the upper roof frame and hold it at a predetermined height so that the height gap becomes a constant size.

A first means of the present invention for solving the above problem is a jack-down device used for jacking down a structure, which includes at least one jack per temporary support point of the structure, and the jack a sliding support part that supports the structure in place of the jack when the supporting force of the structure is released, the sliding support part comprising:
1) Consists of an upper support member attached to a temporary support point of the structure, and a lower support member erected from below so as to overlap a certain area with the upper support member.
2) The upper support material and the lower support material are provided with at least two or more vertical rows of bolt insertion holes that are equally spaced at a vertical hole pitch P in accordance with the vertical gauge line, and the upper support material and the vertical gauge lines of the lower support material overlap each other, and at least one row of the vertical row bolt insertion holes in the range where the upper support material and the lower support material overlap. The bolt insertion holes overlap each other so that the bolt can be inserted through the upper and lower support members.
3) The vertical arrangement of the bolt insertion holes formed in either the upper support member or the lower support member is at the same height as the bolt insertion holes in the adjacent vertical row.
4) The vertical arrangement of the bolt insertion holes drilled in the other upper support member or lower support member is such that the bolt insertion holes are arranged at equal intervals with respect to the bolt insertion holes in the adjacent vertical row. The number of descents m required to lower the structure by the vertical hole pitch P with the directional hole pitch P
The openings are sequentially shifted upward or downward one step at a time by the size of the value P/m divided by P/m.
5) The number of vertical rows of bolt insertion holes drilled in the upper support member and the lower support member is equal to or greater than the number of descents m.
6) One or more pairs of the upper support material and lower support material as described above are installed at all temporary support points of the structure.
This is a jack-down device characterized by having the configuration as described above.

Since the first means of the present invention has the above-described configuration, when the structure is supported by the jack, it is possible to penetrate both the upper and lower supporting members within the range where the upper and lower supporting members overlap. By inserting a required number of bolts into the bolt insertion holes to connect the upper support member and the lower support member, and then releasing the supporting force of the jack and transferring the weight of the structure to the bolts, The structure is held at a predetermined height.

In the first means, the vertical row in which the bolt insertion holes of both the upper and lower supporting members overlap moves to an adjacent vertical row each time the vertical row is lowered, and the upper supporting member and the lower supporting member in the vertical row overlap. The feature is that all the bolt holes in the range overlap.

Next, when lowering the structure, the jack supports the structure again to bear the weight of the structure, and the bolt insertion hole is inserted into the bolt insertion hole in the area where the upper support member and the lower support member overlap. All the inserted bolts are removed, and then, while supporting the structure with the jack, it is lowered to the next predetermined height where the bolt insertion holes of both the upper and lower supporting members overlap.

As described above, "support by jack, bolt insertion, release of jack support" and "support by jack, bolt removal, and lowering by jack support" are sequentially repeated as many times as necessary for all blocks of the structure.

In all the blocks of the structure, if all the permanent supporting parts (column bases) of the structure are placed on the foundation columns etc. by the final step of "supporting with jacks, removing bolts, and lowering by supporting with jacks", the above-mentioned All jacking down of structures has been completed.

A second means of the present invention is a jack-down device used for jacking down a structure, which includes at least one jack per temporary support point of the structure, and the supporting force of the jack is released. a sliding support part that supports the structure in place of the jack when the structure is
1) Consists of an upper support member attached to a temporary support point of the structure, and a lower support member erected from below so as to overlap a certain area with the upper support member.
2) The upper support member and the lower support member are each provided with one or more vertical rows of upper and lower bolt insertion holes opened at equal intervals in accordance with the vertical gauge line; The vertical gauge lines of the upper and lower supports are arranged to overlap each other.
3) The vertical hole pitches of the vertical rows of the upper and lower bolt insertion holes are different from each other, and in the range where the upper support member and the lower support member overlap, at least one row of the upper and lower bolts of the vertical row The insertion holes overlap each other at positions corresponding to the least common multiple of the respective vertical hole pitches, so that bolts can be inserted through both the upper and lower supporting members.
4) In the range where the vertical rows of bolt insertion holes drilled in the upper support material and the lower support material overlap, when p is the descending unit dimension in which the structure is lowered only once, the upper and lower bolt insertion holes the minimum distance between the upper bolt insertion hole and the nearest lower bolt insertion hole located below the upper bolt insertion hole is n×p (n: a natural number of 1 or more), and the The number N of vertical rows of the upper and lower bolt insertion holes satisfies N≧n.
5) One or more pairs of the upper support member and lower support member as described above are installed at a temporary support point of the structure.
This is a jack-down device characterized by having the configuration as described above.

Further, in the second means, two or more vertical rows of the upper and lower bolt insertion holes are provided in the upper support member and the lower support member, respectively, and are formed at equal intervals in accordance with a vertical gauge line. In case,
1) The vertical arrangement of either the upper or lower bolt holes is at the same height as the upper and lower bolt holes of the adjacent vertical row.
2) The vertical arrangement of the other upper or lower bolt insertion holes is the vertical arrangement of the bolt insertion holes in the vertical row adjacent to any one vertical row of bolt insertion holes. The directional position is sequentially shifted upward or downward by the descending unit dimension p.
3) One or more pairs of the above-mentioned upper support member and lower support member are installed at a temporary support point of the structure.
This is a jack-down device characterized by having the configuration as described above.

Since the second means of the present invention has the above configuration, when there is one vertical row in which the vertical gauge lines of the upper and lower bolt insertion holes overlap, there are at least one row of upper and lower bolt insertion holes in the vertical row. Two or more always overlap.

If the number of vertical rows in which the vertical gauge lines of the upper and lower bolt insertion holes overlap is two or more N rows, the overlapping bolt insertion holes are sure to occur in one of the vertical rows for each descent, and the above-mentioned There is a feature that the overlapping arrangement of the bolt insertion holes in all the vertical rows goes through one cycle every time the upper and lower bolt insertion holes are lowered, which corresponds to the vertical pitch of the larger one.

Therefore, when the structure is supported by the jack, the necessary number of bolts are inserted into bolt insertion holes that can penetrate both the upper and lower supports in the area where the upper and lower supports overlap. , the structure is held at a predetermined height by connecting the upper and lower supports and then releasing the supporting force of the jack to transfer the weight of the structure to the bolts.

Next, when lowering the structure, the jack supports the structure again to bear the weight of the structure, and the bolt insertion hole is inserted into the bolt insertion hole in the area where the upper support member and the lower support member overlap. All the inserted bolts are removed, and then, while supporting the structure with the jack, it is lowered to the next predetermined height where the upper and lower bolt insertion holes overlap.

As described above, "support by jack, bolt insertion, release of jack support" and "support by jack, bolt removal, and lowering by jack support" are sequentially repeated as many times as necessary for all blocks of the structure.

In all the blocks of the structure, if all the permanent supporting parts (column bases) of the structure are placed on the foundation columns etc. by the final step of "supporting with jacks, removing bolts, and lowering by supporting with jacks", the above-mentioned All jacking down of structures has been completed.

Further, a third means of the present invention is a jack-down device used for jacking down a structure, which includes at least one jack per temporary support point of the structure, and the supporting force of the jack is released. a sliding support part that supports the structure in place of the jack when the structure is
1) Consists of an upper support member attached to a temporary support point of the structure, and a lower support member erected from below so as to overlap a certain area with the upper support member.
2) The upper support material and the lower support material are each provided with two vertical rows of upper and lower bolt insertion holes that are equally spaced along the vertical gauge line, and the upper support material and the lower support material The vertical gauge lines of the bolt insertion holes of the lower support member are arranged to overlap each other.
3) The vertical hole pitches of the vertical rows of the upper and lower bolt insertion holes are different from each other, and the upper and lower bolts belong to either one of the two vertical rows in the range where the upper support material and the lower support material overlap. The insertion holes overlap each other at positions corresponding to the least common multiple of the respective vertical hole pitches, and it is possible to insert the bolt through both the upper and lower supporting members.
4) The vertical arrangement of either the upper or lower bolt holes is at the same height as the bolt holes in the adjacent vertical row.
5) The vertical position of the other upper or lower bolt insertion hole is such that the vertical position of the bolt insertion hole in either one of the two vertical rows is set as above with respect to the bolt insertion hole in the other vertical row. When the structure is shifted upward or downward by the descent unit dimension p when lowering the structure once, and when the upper and lower bolt insertion holes of either vertical row overlap, the upper bolt insertion of the other vertical row At least one of the holes has a minimum distance p from the nearest lower bolt insertion hole located below it.
6) One or more pairs of the upper support member and lower support member as described above are installed at a temporary support point of the structure.
This is a jack-down device characterized by having the configuration as described above.

Since the third means of the present invention has the above-described configuration, in the two vertical rows of bolt insertion holes in both the upper and lower supporting members, when the upper and lower bolt insertion holes in one of the vertical rows overlap, , the upper and lower bolt insertion holes of the other vertical row do not overlap, and during the next descent, the vertical rows in which the bolt insertion holes overlap are swapped. In other words, the occurrence of overlapping of the bolt insertion holes is alternated for each descent, and the bolt insertion is performed every number of descents corresponding to the vertical pitch of the larger of the upper and lower bolt insertion holes. It has the characteristic that the overlapping arrangement of holes goes around once.

Therefore, when the structure is supported by the jack, bolts that can penetrate both the upper and lower supporting members in either of the two vertical rows within the range where the upper supporting member and the lower supporting member overlap. By inserting a required number of bolts into the insertion holes to connect the upper support member and the lower support member, and then releasing the supporting force of the jack and transferring the weight of the structure to the bolts, The structure is held at a predetermined height.

Next, when lowering the structure, the jack supports the structure again to bear the weight of the structure, and the bolt insertion hole is inserted into the bolt insertion hole in the area where the upper support member and the lower support member overlap. All the inserted bolts are removed, and then, while supporting the structure with the jack, it is lowered to the next predetermined height where the upper and lower bolt insertion holes overlap in the other of the two vertical rows.

As described above, "support by jack, bolt insertion, release of jack support" and "support by jack, bolt removal, and lowering by jack support" are sequentially repeated as many times as necessary for all blocks of the structure.

In all the blocks of the structure, if all the permanent supporting parts (column bases) of the structure are placed on the foundation columns etc. by the final step of "supporting with jacks, removing bolts, and lowering by supporting with jacks", the above-mentioned All jacking down of structures has been completed.

Since the present invention is a jack-down device using the above-described means, it can be used to construct integrally assembled structures such as long roof structures with a large number of temporary support points and long platform sheds at railway stations. When jacking down, the following effects can be obtained.
(1) Damage to the assembled structure can be reliably avoided when implementing a construction method in which the assembled structure is sequentially jacked down block by block.
(2) In the case of the simultaneous jacking down construction method of the entire structure, a large amount of cost is required because equipment units such as hydraulic jacks are installed at all temporary support points, but in the present invention, one block Since a fixed height can be maintained and temporarily supported each time the block is lowered, the jack etc. can be removed and moved to the next block, thereby reducing the overall cost.
(3) The sliding support section consisting of upper and lower support members for temporarily supporting the structure while the jack is removed is simple and requires less manufacturing cost.

An overall view of the shed frame just before jacking down, (a) is a floor plan of the structure, (b) is a cross-sectional view of (a) or (d), and (c) is a view of (a) or (d). (d) is a cross-sectional view of Ro-Ro, and (d) is a cross-sectional view of (a). This is an overall view of the shed frame during jacking down; (a) is a knee-to-knee cross-sectional view of (c), and (b) is a ho-ho cross-sectional view of (c). 1 shows an example of an embodiment of a jack-down device according to the present invention, in which (a) is a front view, (b) is a cross-sectional view of (a), and (c) is a tote cross-sectional view. FIG. 7 is a descending step diagram when the pitch P of vertically aligned bolt insertion holes opened in the upper and lower supporting members of the jack-down device is 4 cm for both the upper and lower sides in the first embodiment of the first means of the present invention. FIG. 7 is a descending step diagram when the pitch P of vertically aligned bolt insertion holes drilled in the upper and lower supporting members of the jack-down device is 2 cm in both the upper and lower sides in the second embodiment of the first means of the present invention. It is an explanatory view of the first to third embodiments of the second means of the present invention, in which the L pitch of vertically arranged bolt insertion holes drilled in the lower support member is 3 cm, and the U pitch of the upper bolt insertion holes is changed. It is a diagram explaining how the upper and lower bolt insertion holes (L, U) overlap and their relationship with the required number of vertical rows N. The upper bolt insertion hole U pitch is 4 cm in (a) of the first embodiment, (b) of the second embodiment is 5 cm, and (c) of the third embodiment is 6 cm. FIG. 6 is a descending step diagram of the first embodiment of the second means of the present invention. It is an explanatory diagram of the fourth to sixth embodiments of the second means of the present invention, in which the L pitch of vertically arranged bolt insertion holes drilled in the lower support member is 4 cm, and the U pitch of the upper bolt insertion holes is changed. It is a diagram explaining how the upper and lower bolt insertion holes (L, U) overlap and its relationship with the required number of vertical rows N. The upper bolt insertion hole U pitch is 5 cm in (a) of the fourth embodiment, (b) of the fifth embodiment is 6 cm, and (c) of the sixth embodiment is 8 cm. It is a descending step diagram of the fifth embodiment of the second means of the present invention. FIG. 4 is a developed view when the fifth embodiment of the second means of the present invention is applied to portions A and B in FIG. 3, and shows descending step diagrams up to the sixth time.

Examples of the jack-down device according to the present invention will be described below. FIG. 3 shows an example of an embodiment of a jack-down device, which supports a beam part 10 of a shed frame 1 that constitutes a long structure such as a railway station platform shed, for example. The upper supports 12, 12, ... attached to the temporary support point 3 via the temporary support part 11, and the lower part (the top of the shoring 2) so that a certain range overlaps with the upper supports 12, 12, ... The upper supports 12, 12, . . . and the lower supports 13, 13 have bolt insertion holes 14 equally spaced along the vertical gauge line. , 14, . . . are provided in a plurality of vertical rows.

As shown in FIG. 3(c), the upper support members 12, 12, ... and the lower support members 13, 13 are provided in a rectangular arrangement in plan view, and the four L-shaped upper support members 12 The two H-shaped cross-section lower support members 13 overlap in a certain range along the inner corners of both ends, and the upper and lower support members A vertical row of bolt insertion holes 14, 14, . . . is provided so that some of the bolt insertion holes 12, 13 can overlap and allow bolts to be inserted therethrough. The lower supports 13, 13 are fixed to the shoring 2 side of the structure, and the upper supports 12, 12, . . . on the beam portion 10 side are slidable downward as the shed frame 1 descends.

In the first embodiment of the jack-down device according to the first means of the present invention, the bolt insertion holes 14, 14, . This is the case when it is formed like this.

FIG. 4 shows one surface (corresponding to section A or B in FIG. 3) of the upper support member 12 and the lower support member 13, which has four rows of vertical gauge lines A1 to A4. The bolt insertion holes 14, 14, ... are equally spaced at a vertical hole pitch P (4 cm in FIG. Gauge lines A1 to A4 are arranged to overlap each other. Here, the broken line square represents the upper support member 12, and the solid line square represents the lower support member 13.

The "0th time" shown in FIG. 4 is the state immediately before descending, and the bolt insertion holes 14, 14, ... on the vertical gauge line A1 in the range where the upper and lower support members (12, 13) overlap are the hole numbers. 1 to 4 overlap (indicated by ●), so pass through the upper and lower support members (12, 13) and insert the number of bolts required to support shed frame 1 (maximum 4 for "0th time"). can.

The bolt insertion holes 14, 14, . . . drilled in the upper support member 12 are at the same height as the bolt insertion holes 14, 14, .

The vertical arrangement of the bolt insertion holes 14, 14, . The vertical hole pitch P (4 cm) is divided by the number of descents m (4 in Fig. 4) required to lower the shed frame 1 by the vertical hole pitch P, which is P/m = 1 cm, on the vertical gauge line A1. On the other hand, the openings are shifted downward one step at a time in the order of A2 to A4. In the following examples, explanation will be given assuming that the descending unit dimension p for lowering the shed frame 1 once is 1 cm, but the dimension (p) is the range within which the shed frame 1 remains within the elastic range (deformation limit without damage). You can set it with .

In the first embodiment of the first means of the present invention, the upper and lower pairs of surfaces (corresponding to sections A and B in FIG. 3) on which the bolt insertion holes 14, 14, ... are arranged as described above (corresponding to sections A and B in FIG. 3) are As shown in the figure, the jack-down device is built into the four corners of a rectangular arrangement in plan view, with two L-shaped cross-section surfaces of the upper support member 12 and two surfaces of the H-shaped cross-section one end corner of the lower support member 13.

In the first embodiment described above, when the shed frame 1 is lowered by the vertical hole pitch (4 cm) of the bolt insertion holes 14, 14, . is required. The positions of the overlapping bolt insertion holes 14, 14, ... (indicated by ●) are as shown in FIG. Move to hole numbers 1 to 4 in row A2, which are the bolt insertion holes 14, 14, ... of the lower support material 13, which were 1 cm directly below the bolt insertion holes 14, 14, ... of the upper support material 12 in the "0th time" (See dashed arrow).

In the same way, when descending 1 cm at a time, the vertical row of overlapping holes moves to the next one, as shown in Figure 4, and in the "4th time", the vertical row of overlapping holes returns to row A1 ( (corresponds to “0th time”).

As described above, in the first embodiment, the position where the bolts will be inserted into the bolt insertion holes 14, 14, . However, in order to descend 4 cm, the width of the upper and lower support members (12, 13) must be sufficient to secure four vertical rows of bolt insertion holes 14, 14, ..., which makes it difficult to make the device more compact. There's a problem.

The second embodiment of the jack-down device according to the first means of the present invention solves the problem of making the device more compact, which was the problem of the first embodiment, and the bolt insertion holes 14, 14, . . . are vertically arranged. The arrangement will be explained with reference to FIG.

Similar to the first embodiment, FIG. 5 shows a surface corresponding to section A or B in FIG. , 14, ... are equally spaced at a vertical hole pitch P (2 cm in FIG. 5), and the vertical gauge lines A1 to A2 of the bolt insertion holes 14, 14, ... of the upper support member 12 and the lower support member 13 are are arranged to overlap each other.

The "0th time" shown in FIG. 5 is the state immediately before the descent, and the bolt insertion holes 14, 14, ... of the vertical gauge line A1 in the range where both the upper and lower support members overlap are hole numbers 1 to 4. Since they overlap (indicated by ●), the number of bolts required to support the shed frame 1 (up to 4 bolts for the "0th time") can be inserted through the upper and lower support members (12, 13).

The bolt insertion holes 14, 14, . . . drilled in the upper support member 12 are at the same height as the bolt insertion holes 14, 14, .

The vertical arrangement of the bolt insertion holes 14, 14, . The vertical hole pitch P (2 cm) is divided by the number of descents m (2 in Fig. 5) required to lower the shed frame 1 by the vertical hole pitch P, which is P/m = 1 cm, on the vertical gauge line A1. On the other hand, A2 can be opened by shifting it downward.

In this second embodiment, when lowering the shed frame 1 by the vertical hole pitch P (2 cm) of the bolt insertion holes 14, 14, ..., the lowering unit dimension p is 1 cm, so two lowerings are required. become. The positions of the overlapping bolt insertion holes 14, 14, ... (indicated by ●) are as shown in FIG. Move to hole numbers 1 to 4 in row A2, which are the bolt insertion holes 14, 14, ... of the lower support material 13, which were 1 cm directly below the bolt insertion holes 14, 14, ... of the upper support material 12 in the "0th time" (See dashed arrow).

In the same manner, when descending 1 cm at a time, the vertical rows of overlapping holes regress to the A1 row ("0 ). In other words, the overlapping vertical rows of the bolt insertion holes 14, 14, .

As described above, in the second embodiment, as in the first embodiment, the position of bolt insertion into the bolt insertion holes 14, 14, . . . can be clearly predicted during each descent, and Since it is sufficient to secure at least two vertical rows of 14, 14, .

However, since the minimum dimension of the vertical hole pitch P is determined by the need for strength in accordance with the diameter of the bolt to be inserted, the bolts that can be used at a pitch of 2 cm are quite thin, as shown in FIG. Therefore, the problem is that the vertical load supported during descent cannot be increased.

Next, an example of the second means of the present invention will be shown below. The second means is when the vertical hole pitches P of the bolt insertion holes 14, 14, . . . of the upper and lower supporting members (12, 13) are different.

Table 1 shows the combinations of the hole pitch dimensions of the lower bolt insertion hole L of the lower support material 13 and the upper bolt insertion hole U of the upper support material 12, and when the least common multiple of the pitch of both the upper and lower holes is 20 cm or less (6 cases ).

If the least common multiple of the pitch of both the upper and lower holes is too large, the range in which the upper and lower support members (12, 13) should overlap becomes longer, so in order to avoid increasing the height of the jack-down device, in the following example, it is temporarily set to 20 cm. Limited to the following. Of course, in actual construction, it goes without saying that the length of the overlapping range of the upper and lower supporting members (12, 13) may be set according to the situation.

In the first to third embodiments of the second means, the pitch of the lower bolt insertion holes L is 3 cm. First, in the first embodiment, as shown in FIG. 6(a), the combination of the pitches of the upper and lower holes (L, U)=(3 cm, 4 cm), and the least common multiple=12. Although the vertical gauge lines of the bolt insertion holes 14, 14, etc. of the actual upper and lower support members (12, 13) overlap, they are shown in parallel here for ease of understanding, and the × mark indicates the lower bolt insertion hole L, The ● mark indicates the upper bolt insertion hole U. If the position numbers with these marks match, it means that the holes overlap.

In the case of the first embodiment shown in FIG. 6(a), when one of the upper and lower bolt insertion holes (L, U) coincides with hole number 0, even hole number 12, which is the least common multiple, overlaps. Based on this state, when the upper support member 12 is lowered by descending unit dimension p = 1 cm, the upper bolt insertion holes of No. 0, No. 4, No. 8, No. 12, No. 16, and No. 20 within the range of the least common multiple. It can be seen that the number of times i of descent until U next overlaps with the lower bolt insertion hole L is 3 times, 2 times, and 1 time, respectively. In other words, every time the upper support member 12 descends by the unit of descent p=1 cm, one of the four upper bolt insertion holes U will necessarily overlap with the lower bolt insertion hole L.

Therefore, 1, which is the minimum number of descents i until the upper and lower bolt insertion holes (U, L) overlap next time, is ensured as the minimum number of vertical rows of the upper and lower bolt insertion holes (U, L). This allows the bolt to be inserted through the upper and lower support members (12, 13). When the total number of bolt insertion holes 14 to be secured for each descent is insufficient depending on the weight of the shed frame 1 to be supported, the bolt insertion holes 14, 14, etc. are arranged vertically, for example. You can secure it by increasing it to two rows.

Next, in the second embodiment of the second means, as shown in FIG. 6(b), the combination of upper and lower bolt insertion hole pitches (L, U) = (3 cm, 5 cm), and the least common multiple = 15. be.

In the case of this second embodiment, when one of the upper and lower bolt insertion holes (L, U) matches with hole number 0, even number 15, which is the least common multiple, overlaps. Based on this state, when the upper support member 12 descends by descending unit dimension p = 1 cm, the upper bolt insertion holes U of No. 0, No. 5, No. 10, and No. 15, which are in the range of the least common multiple, will be next to the lower bolts. It can be seen that the number of times i of descent until it overlaps with the insertion hole L is 3 times, 1 time, 2 times, and 3 times, respectively. In other words, every time the upper support member 12 descends by the unit of descent p=1 cm, one of the four upper bolt insertion holes U will necessarily overlap with the lower bolt insertion hole L.

Therefore, 1, which is the minimum number of descents i until the upper and lower bolt insertion holes (U, L) overlap next time, is ensured as the minimum number of vertical rows of the upper and lower bolt insertion holes (U, L). This allows the bolt to be inserted through the upper and lower support members (12, 13). When the total number of bolt insertion holes 14 to be secured for each descent is insufficient depending on the weight of the shed frame 1 to be supported, the bolt insertion holes 14, 14, etc. are arranged vertically, for example. You can secure it by increasing it to two rows.

Next, in the third embodiment of the second means, as shown in FIG. 6(c), the combination of upper and lower bolt insertion hole pitches (L, U) = (3 cm, 6 cm), and the least common multiple = 6. be.

In the case of this third embodiment, when one of the upper and lower bolt insertion holes (L, U) matches hole number 0, in addition to number 6 corresponding to the least common multiple of 6, 12 which is a multiple of 6 Numbers 1 and 18 also overlap. Based on this state, when the upper support member 12 is lowered by descending unit dimension p = 1 cm, the upper bolt insertion holes U of No. 0, No. 6, No. 12, and No. 18, which are in the range of the least common denominator, will be next to the lower bolts. It can be seen that the number of times i of descent until it overlaps with the insertion hole L is three times. In other words, when the upper support member 12 is lowered by the lowering unit size p=1 cm, it is necessary to wait three times before the four upper bolt insertion holes U overlap the lower bolt insertion holes L next time.

Therefore, 3, which is the minimum number of descents i until the upper and lower bolt insertion holes (U, L) overlap next time, is set as the minimum number of vertical rows of the upper and lower bolt insertion holes (U, L). It is necessary to secure it.

In the third embodiment, the least common multiple is as small as 6, so if three vertical rows are provided in a section with a length of 20 cm, one of the vertical rows will always have upper and lower bolt insertion holes ( U, L) can be overlapped in 3 to 4 places.

In the first to third embodiments of the second means, the pitch of the lower bolt insertion holes L is 3 cm. However, the pitch of the lower bolt insertion holes L is 3 cm. As long as the minimum hole pitch is met, there is no problem with any combination of upper and lower bolt insertion hole pitches (L, U).

However, if priority is given to suppressing the width of the upper and lower support members (12, 13), either the first or second embodiment, in which the minimum number of vertical rows is one, will be used; ) in the first embodiment (FIG. 6(a)) where the least common multiple is smaller (L, U)=(3 cm, 4 cm) is advantageous.

FIG. 7 shows bolt insertion holes 14, 14, . A specific example is shown below. In Fig. 7, even if there is only one vertical row of bolt insertion holes 14, 14, ..., it is possible to secure 2 to 3 overlapping holes (indicated by ●), but when ensuring 4 to 5 overlapping holes at all times, It is assumed that the bolt insertion holes 14, 14, . . . are arranged vertically in two rows. Here, the broken line square represents the upper support member 12, and the solid line square represents the lower support member 13.

The vertical hole pitch P of the lower support member 13 is 3 cm, and the vertical hole pitch P of the upper support member 12 is 4 cm, with a difference of 1 cm between the upper and lower hole pitches P. Each bolt insertion hole 14, 14, . On the other hand, row A2 is arranged to be shifted downward by the descending unit dimension p=1 cm. The reason for shifting the A2 row is that the height positions of the overlapping holes in the A1 row and A2 row are spaced apart vertically, thereby increasing the space required for tool operation when tightening bolts inserted into the holes. This is to do so.

Assuming that the descending unit dimension p of the shed frame 1 is 1 cm, in order to descend the lower support member 13 by 3 cm of the vertical hole pitch P, it is necessary to descend the shed frame 1 three times. To explain with reference to FIG. 7, focusing on the A1 column of the "0th time", the hole arrangement of the first embodiment corresponds to the least common multiple of 12 cm of the hole pitch of 4 cm and 3 cm of the upper and lower support members (12, 13). Holes with hole numbers 1, 5, and 9 at these positions overlap (indicated by ●). In the A2 row, the holes numbered 2 and 6 similarly overlap. Hole number 10 is invalid because it is outside the overlapping range of the upper and lower support members (12, 13).

The bolt insertion holes 14, 14, ... that overlap in the "first time" when the upper support member 12 is lowered by 1 cm are the case where the lower bolt insertion hole L is located 1 cm directly below the upper bolt insertion hole U in the "0th time". The hole numbers in the A1 row are 4 and 8, and the hole numbers in the A2 row are 1, 5, and 9.

The holes overlap in the same pattern from the "second time" onwards, but the overlapping pattern of the holes in the "fourth time" is the same as that in the "zero time". This is because the hole pitch of the upper support material 12 is 4 cm, so one cycle is completed by descending 1 cm each four times.

In the first to third embodiments of the second means described above, the hole pitch of the lower bolt insertion holes U is 3 cm, but when the supporting load becomes heavier, the diameter of the bolt used is increased to improve the bearing pressure strength of the hole and the hole pitch. It is necessary to further widen the pitch to ensure cross-sectional strength between the holes.

Therefore, in the fourth to sixth embodiments of the second means of the present invention shown below, the hole arrangement is such that the hole pitch of the lower bolt insertion holes U is 4 cm.

The fourth example of the second means is a case where the combination of the bolt insertion hole pitches of the upper and lower holes (L, U)=(4 cm, 5 cm) and the least common multiple=20, as shown in FIG. 8(a). Although the vertical gauge lines of the bolt insertion holes 14, 14, ... of the actual upper and lower support members (12, 13) overlap, they are shown in parallel here to make it easier to understand. The ● mark indicates the upper bolt insertion hole U. If the position numbers with these marks match, it means that the holes overlap.

In the case of this fourth embodiment, when one of the upper and lower bolt insertion holes (L, U) matches the hole number 0, even the least common multiple number 20 overlaps. Based on this state, when the upper support member 12 is lowered by descending unit dimension p = 1 cm, the upper bolt insertion holes U of No. 0, No. 5, No. 10, and No. 15, which are in the range of the least common multiple, will be next to the lower bolts. It can be seen that the number of times i of descent until it overlaps with the insertion hole L is 4 times, 3 times, 2 times, and 1 time, respectively. In other words, every time the upper support member 12 descends by the descending unit dimension p=1 cm, one of the four upper bolt insertion holes U necessarily overlaps with the lower bolt insertion hole L.

Therefore, 1, which is the minimum number of descents i until the upper and lower bolt insertion holes (U, L) overlap next time, is ensured as the minimum number of vertical rows of the upper and lower bolt insertion holes (U, L). This allows the bolt to be inserted through the upper and lower support members. When the total number of bolt insertion holes 14 to be secured for each descent is insufficient depending on the weight of the shed frame 1 to be supported, the bolt insertion holes 14, 14, etc. are arranged vertically, for example. You can secure it by increasing it to two rows.

Next, in the fifth embodiment of the second means, as shown in FIG. 8(b), the combination of upper and lower bolt insertion hole pitches (L, U) = (4 cm, 6 cm), and the least common multiple = 12. be.

In the case of this fifth embodiment, when one of the upper and lower bolt insertion holes (L, U) matches the hole number 0, even the least common multiple number 12 overlaps. Based on this state, if the upper support member 12 is lowered by descending unit dimension p = 1 cm, the upper bolt insertion holes U of No. 0, No. 6, No. 12, and No. 18 located at the positions corresponding to the least common multiple will be next. It can be seen that the number of times i of descent until it overlaps with the lower bolt insertion hole L is 4 times and 2 times, respectively. In other words, when the upper support member 12 is lowered by the lowering unit size p=1 cm, it is necessary to wait twice before the four upper bolt insertion holes U overlap the lower bolt insertion holes L next.

Therefore, 2, which is the minimum number of descents i until the upper and lower bolt insertion holes (U, L) overlap next time, is set as the minimum number of vertical rows of the upper and lower bolt insertion holes (U, L). It is necessary to secure it.

Next, in the sixth embodiment of the second means, as shown in FIG. 8(c), the combination of upper and lower bolt insertion hole pitches (L, U) = (4 cm, 8 cm), and the least common multiple = 8. be.

In the case of this sixth embodiment, when one of the upper and lower bolt insertion holes (L, U) matches the hole number 0, even the lowest common multiple number 8 overlaps. Furthermore, the number 16, which is a multiple of the least common multiple of 8, also overlaps. Based on this state, when the upper support member U descends by descending unit dimension p = 1 cm, the upper bolt insertion holes U of No. 0, No. 8, and No. 16 located at the positions corresponding to the least common multiple will be used as the lower bolts next. It can be seen that the number of times i of descent until it overlaps with the insertion hole L is four times. In other words, when the upper support member 12 is lowered by the descending unit size p=1 cm, it is necessary to wait four times until the four upper bolt insertion holes U overlap the lower bolt insertion holes L next.

Therefore, 4, which is the minimum number of descents i until the upper and lower bolt insertion holes (U, L) overlap next time, is the minimum number of vertical rows of the upper and lower bolt insertion holes (U, L). It is necessary to secure it.

In the fourth to sixth embodiments of the second means, the pitch of the lower bolt insertion holes L is 4 cm. This is more advantageous than the first to third embodiments, and there is no problem with any combination of upper and lower bolt insertion hole pitches (L, U).

However, when considering reducing the width and height of the upper and lower support members (12, 13), the fourth embodiment allows for one vertical row, so the width is good, but the least common multiple is as large as 20 cm, and the sixth embodiment In this embodiment, the lowest common multiple is 8 cm, which is the smallest, so the height is good, but four vertical rows are required, which increases the width. Therefore, (L, U)=(4 cm, 6 cm) in the fifth embodiment (FIG. 8(b)), which is between the two, is practical.

FIG. 9 shows bolt insertion holes 14, 14, . A specific example is shown below. When the descending unit dimension p = 1 cm, by ensuring two vertical rows of bolt insertion holes 14, 14, ..., there are two holes (indicated by ●) that always overlap in one of the vertical rows during each descent. Secured. Here, the broken line square represents the upper support member 12, and the solid line square represents the lower support member 13.

Since the descending unit dimension p of the shed frame 1 is 1 cm, in order to descend the vertical hole pitch U of the lower support member 13 by 4 cm, it is necessary to descend the shed frame 1 four times. To explain with reference to FIG. 9, hole numbers 1 and 4 in row A1 overlap in the "0th time", but in the hole arrangement of the fifth embodiment, the hole pitch of the upper and lower bolt insertion holes (U, L) is An overlap will occur in the holes located at the position corresponding to the least common multiple of 6 cm and 4 cm, 12 cm.

The holes that overlap in the "1st time" when lowered by 1 cm are the cases where the lower bolt insertion hole L is located 1 cm directly below the upper bolt insertion hole U in the "0th time", so the hole in the A2 row that is one step (1 cm) lower than the A1 row. The hole numbers are 1 and 4, and the holes in row A1 do not overlap. In the next "second time", the holes numbered 3 and 6 in the A1 row, where the lower bolt insertion hole L was located 1 cm directly below the upper bolt insertion hole U in the "first time", and the holes in the A2 row do not overlap.

The holes overlap in the same pattern after the "3rd time", but the overlapping pattern of the holes in the "6th time" is the same as that in the "0th time". This is because the hole pitch of the upper bolt insertion hole U is 6 cm, so the bolt goes around by descending 1 cm each six times.

Part A shown in FIG. 3 showing an embodiment of the jack-down device corresponds to the fifth embodiment of the second means of the present invention, and corresponds to the fifth embodiment of the second means of the present invention. This is a case where two vertical rows are arranged. The two upper and lower rows are arranged as a pair, and the two sides of the L-shaped cross section of the upper support member 12 and the two sides of the H-shaped cross-section one end corner of the lower support member 13 are arranged as a pair at the four corners of a rectangle in plan view. A box-like structure is formed in which the four upper support members 12 serve as an inner cylinder, and the two lower support members 13, 13 serve as an outer cylinder.

To use this jack-down device, referring to FIG. 3, attach the upper support members 12 via the temporary support parts 11 at all the temporary support points 3 that support the beam parts 10 of the shed frame 1, The lower support member 13 is fixed to the top of the shoring 2, and a jack 15 is installed directly below the temporary support part 11, and the load of the shed frame 1 is transferred to the jack 15 via several support blocks 16, 16, . Place it so that it can be communicated.

The ram 15a of the jack 15 that supports the shed frame 1 is installed in a state where it is stretched to the size required for at least one descent, and at the beginning of the descent, the bolt insertion holes 14 of the upper and lower support members (12, 13) are installed. , 14, . . . The ram 15a of the jack 15 is slightly extended upward so that the jack 15 fully supports the load of the shed frame 1, which is supported by the bolts inserted through the bolts. While supporting the ram 15a, lower the ram 15a by the lowering unit dimension p, insert the bolts again into the locations where the bolt insertion holes 14, 14, etc. of the upper and lower supports (12, 13) match, and then lower the ram 15a of the jack 15. The support is released and the weight of the portal structure is transferred to the bolts.

At this time, if there is not enough room for lowering the ram 15a, remove the necessary number of height adjustment plates 17, 17, etc. while the load of the shed frame 1 is being supported by the bolts, or remove the support blocks 16, 16, . . . one by one to secure an upper space in which the ram 15 can be extended.

The above operation is performed for all the temporary support points 3, 3, . . . that support one block of the shed frame 1 to be jacked down, and one descent is completed. This operation is carried out in order for all the blocks of the shed frame 1, and is repeated until all the main supporting parts (column bases) of the shed frame 1 are placed on the foundation columns 2, 2, . . . .

FIG. 10 shows a case where one pair of upper and lower bolt insertion holes 14, 14, . shows. Part A has the same vertical arrangement of the bolt insertion holes 14, 14, . . . as shown in Fig. 9, and part B has the bolt insertion holes 14, 14, . It is placed on the contrary, and represents the descending steps up to the sixth time. It can be seen that the position of the overlapping holes (● marks) alternates between the A1 (B2) column and the A2 (B1) column each time it descends.

If all the permanent supporting parts (column bases) of the shed frame 1 are fixed to the foundation columns 2, 2, etc. using anchor bolts or the like and become self-supporting, all of the shorings 2, 2, etc. can be dismantled.

In each embodiment of the present invention, the descending unit dimension p of the shed frame 1 was set to 1 cm, but it goes without saying that the descending unit dimension p is not limited to 1 cm depending on the characteristics of the framework to be jacked down.

Further, the combination of the hole pitches of the upper and lower bolt insertion holes (L, U) is not limited to those shown in Table 1, and it goes without saying that the effect will be the same even if the hole pitch dimensions are reversed.

The present invention is capable of jacking down the entire structure at the same time when jacking down the entire structure that has been assembled as one in the construction of a long roof structure with a large number of temporary support points or a long platform shed at a railway station. The target is not a construction method, but a construction method in which the entire frame is divided into several blocks and sequentially jacked down each block, and provides a simple jackdown device that can reliably avoid damage to an integrated structure. At the same time, costs can also be reduced.

1: Shed frame 1a, 1b,..., 1f: Blocks of shed frame 2: Shoring 3: Temporary support point 4: Foundation column 5: Column 6: Slide rail 7: Wire rope winding device 10: Beam section 11 : Temporary support part 12: Upper support material 13: Lower support material 14: Bolt insertion hole 15: Jack 15a: Ram 16: Support block 17: Height adjustment plate L: Lower bolt insertion hole U: Upper bolt insertion hole

Claims (4)

A jack-down device used for jacking down a structure, comprising at least one jack per temporary support point of the structure, and a jack-down device that replaces the jack when the supporting force of the jack is released. a sliding support part that supports the structure, the sliding support part comprising:
1) Consists of an upper support member attached to a temporary support point of the structure, and a lower support member erected from below so as to overlap a certain area with the upper support member.
2) The upper support material and the lower support material are provided with at least two or more vertical rows of bolt insertion holes that are equally spaced at a vertical hole pitch P in accordance with the vertical gauge line, and the upper support material and the vertical gauge lines of the lower support material overlap each other, and at least one row of the vertical row bolt insertion holes in the range where the upper support material and the lower support material overlap. The bolt insertion holes overlap each other so that the bolt can be inserted through the upper and lower support members.
3) The vertical arrangement of the bolt insertion holes formed in either the upper support member or the lower support member is at the same height as the bolt insertion holes in the adjacent vertical row.
4) The vertical arrangement of the bolt insertion holes drilled in the other upper support member or lower support member is such that the bolt insertion holes are arranged at equal intervals with respect to the bolt insertion holes in the adjacent vertical row. The openings are sequentially shifted one step at a time upward or downward by the dimension P/m, which is the directional hole pitch P divided by the number of descents m required to lower the structure by the vertical hole pitch P. There is.
5) The number of vertical rows of bolt insertion holes drilled in the upper support member and the lower support member is equal to or greater than the number of descents m.
6) One or more pairs of the upper support material and lower support material as described above are installed at all temporary support points of the structure.
A jack-down device characterized by having the above configuration. A jack-down device used for jacking down a structure, comprising at least one jack per temporary support point of the structure, and a jack-down device that replaces the jack when the supporting force of the jack is released. a sliding support part that supports the structure, the sliding support part comprising:
1) Consists of an upper support member attached to a temporary support point of the structure, and a lower support member erected from below so as to overlap a certain area with the upper support member.
2) The upper support member and the lower support member are each provided with one or more vertical rows of upper and lower bolt insertion holes opened at equal intervals in accordance with the vertical gauge line; The vertical gauge lines of the upper and lower supports are arranged to overlap each other.
3) The vertical hole pitches of the vertical rows of the upper and lower bolt insertion holes are different from each other, and in the range where the upper support member and the lower support member overlap, at least one row of the upper and lower bolts of the vertical row The insertion holes overlap each other at positions corresponding to the least common multiple of the respective vertical hole pitches, so that bolts can be inserted through both the upper and lower supporting members.
4) In the range where the vertical rows of bolt insertion holes drilled in the upper support material and the lower support material overlap, when p is the descending unit dimension in which the structure is lowered only once, the upper and lower bolt insertion holes the minimum distance between the upper bolt insertion hole and the nearest lower bolt insertion hole located below the upper bolt insertion hole is n×p (n: a natural number of 1 or more), and the The number N of vertical rows of the upper and lower bolt insertion holes satisfies N≧n.
5) One or more pairs of the upper support member and lower support member as described above are installed at a temporary support point of the structure.
A jack-down device characterized by having the above configuration . In claim 2, the upper support member and the lower support member are provided with two or more vertical rows of the upper and lower bolt insertion holes opened at equal intervals in accordance with a vertical gauge line, respectively. hand ,
1) The vertical arrangement of either the upper or lower bolt holes is at the same height as the upper and lower bolt holes of the adjacent vertical row.
2) The vertical arrangement of the other upper or lower bolt insertion holes is the vertical arrangement of the bolt insertion holes in the vertical row adjacent to any one vertical row of bolt insertion holes. The directional position is sequentially shifted upward or downward by the descending unit dimension p .
3) One or more pairs of the above-mentioned upper support member and lower support member are installed at a temporary support point of the structure.
A jack-down device characterized by having the above configuration. A jack-down device used for jacking down a structure, comprising at least one jack per temporary support point of the structure, and a jack-down device that replaces the jack when the supporting force of the jack is released. and a sliding support section that supports the structure, the sliding support section comprising:
1) Consists of an upper support member attached to a temporary support point of the structure, and a lower support member erected from below so as to overlap a certain area with the upper support member.
2) The upper support material and the lower support material are each provided with two vertical rows of upper and lower bolt insertion holes that are equally spaced along the vertical gauge line, and the upper support material and the lower support material The vertical gauge lines of the bolt insertion holes of the lower support material are arranged to overlap each other.
3) The vertical hole pitches of the vertical rows of the upper and lower bolt insertion holes are different from each other, and the upper and lower bolts belong to either one of the two vertical rows in the range where the upper support material and the lower support material overlap. The insertion holes overlap each other at positions corresponding to the least common multiple of the respective vertical hole pitches, and it is possible to insert the bolt through both the upper and lower supporting members.
4) The vertical arrangement of either the upper or lower bolt holes is at the same height as the bolt holes in the adjacent vertical row.
5) The vertical position of the other upper or lower bolt insertion hole is such that the vertical position of the bolt insertion hole in either one of the two vertical rows is set as above with respect to the bolt insertion hole in the other vertical row. When the structure is shifted upward or downward by the descent unit dimension p when lowering the structure once, and when the upper and lower bolt insertion holes of either vertical row overlap, the upper bolt insertion of the other vertical row At least one of the holes has a minimum distance p from the nearest lower bolt insertion hole located below it.
6) One or more pairs of the upper support member and lower support member as described above are installed at a temporary support point of the structure.
A jack-down device characterized by having the above configuration.

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