JP6975577B2 - Elevated structure and its construction method - Google Patents

Description

The present invention relates to an elevated structure and a method for constructing the elevated structure.

Conventionally, in order to construct a gantry (stage) on a pier, a joint to be joined to the top of the pier and a laterally overhanging portion from the joint as described in Patent Documents 1 and 2. A structure with and is seen.
In Patent Document 2, the pier column is a steel pipe pile, and the joint portion with the top of the steel pipe pile has a structure that fits outside or inside with respect to the top.

Japanese Unexamined Patent Publication No. 2002-206209 Japanese Unexamined Patent Publication No. 2016-217000

However, since the joint has an outer shape that exceeds the diameter of the steel pipe pile and is large in length because it fits with the top of the steel pipe pile for a sufficient length, it is inefficient in storage and transportation. be.
On the other hand, there may be natural or man-made objects that are difficult to move on one side of the steel pipe pile that has been press-fitted into the ground, and there is sufficient space on only the other side. When the above-mentioned joint and the overhanging portion extending in two opposite directions are integrated, the overall size is increased, and the problem is that the joint cannot be used when there is sufficient space on only one side of the steel pipe pile. There is.

The present invention has been made in view of the above problems in the prior art, and can be applied to overhang installation from the upper end to one side of a tubular pile such as a steel pipe pile, can be constructed and removed in a short time, and is advantageous for transportation and the like. It is an object of the present invention to provide an elevated structure having a small size and light weight of various materials and a method for constructing the elevated structure.

The invention according to claim 1 for solving the above problems includes an outer member as a cantilever deck receiving girder that is placed on the upper end of a tubular pile and is arranged outside the tubular pile to support the deck. A pedestal including an inner member inserted into the upper end opening of the tubular pile and arranged in the tubular pile is provided.
An elevated structure in which the inner member is inserted into the tubular pile in a state where the outer member and the inner member are integrally connected.
The upper end of the tubular pile constitutes an annular end face surrounded by an inner circle and an outer circle.
In a plan view, the outer member has a long overhanging portion that extends long in one direction to the outside of the outer circle, and a short overhanging portion that extends shortly to the outside of the inner circle is provided on the opposite side. It is formed so as to fit inside the inner circle, and the center of gravity of the gantry is located outside the one-way side of the outer circle.
The long overhanging portion rests on a part of the annular end face having a central angle of less than 180 degrees.
When the short overhanging portion is provided, the short overhanging portion is placed on a part of the annular end face having a central angle of less than 180 degrees.
The upper end of the inner member is coupled to the lower surface above the inner circle of the outer member.
Said member includes a short abutment the elongated projecting portion abuts against the inner surface of the tubular pile immediately below the portion contacting the end face of the annular, the tubular pile in the opposite side of the short contact portion It is an elevated structure having a long contact portion that abuts on the inner surface and has an insertion length into the tubular pile longer than the short contact portion.

In the invention according to claim 2, the long overhanging portion is mounted on a part of the annular end face having a central angle of 90 degrees or less.
The elevated structure according to claim 1, wherein when the short overhanging portion is provided, the short overhanging portion is placed on a part of the end face of the annular shape having a central angle of 90 degrees or less.

In the invention according to claim 3, the contact surface of the long contact portion is provided below the short contact portion, and above the contact surface, the inner surface of the tubular pile and the long contact portion are provided. The elevated structure according to claim 1 or 2, wherein a gap is provided between the two.

The invention according to claim 4 is a convex portion forming member which enters the gap and forms a convex portion having a lower surface on the inner surface of the tubular pile, which is hooked on the upper surface of a member constituting the contact surface of the long contact portion. The elevated structure according to claim 3.

According to a fifth aspect of the present invention, the contact surface of the short contact portion and the contact surface of the long contact portion are formed in a partially cylindrical surface having a diameter smaller than the inner diameter of the tubular pile. The elevated structure according to any one of claims 1 to 4.

In the invention according to claim 6, at least one of the member constituting the contact surface of the short contact portion and the member constituting the contact surface of the long contact portion is the short contact portion. The elevated structure according to any one of claims 1 to 5, which is removable so that the fitting width of the tubular pile with the long contact portion to the inner diameter can be adjusted. be.

The invention according to claim 7 is the elevated structure according to any one of claims 1 to 6, wherein the width of the gantry is smaller than the inner diameter of the tubular pile.

The invention according to claim 8 has two or more of the pedestals fixed to the upper ends of the two tubular piles constructed on the sides of each other.
The elevated structure according to any one of claims 1 to 7, wherein the stage is configured by a floor slab laid between the outer members of the two adjacent pedestals.

The invention according to claim 9 is claimed that the outer members of two adjacent mounts are arranged in parallel with each other or at a predetermined relative angle in a horizontal plane, and are connected via a horizontal connecting member. 8 is the elevated structure.

The invention according to claim 10 is a construction method for constructing an elevated structure according to any one of claims 1 to 9.
The inner member is arranged above the tubular pile, the inner member is inserted into the tubular pile while lowering the gantry in an inclined posture with the long overhanging portion side upward, and then the gantry is horizontally placed. It is a method of constructing an elevated structure including a pedestal installation process.

The invention according to claim 11 is a construction method for constructing an elevated structure according to claim 8 or 9.
The inner member is placed above the tubular pile, and the inner member is inserted into the tubular pile while lowering the gantry in an inclined posture with the long overhanging portion side facing up, and then the gantry is placed horizontally. The pedestal installation process and
A stage construction step of forming a stage by bridging between the outer members of the two adjacent pedestals is provided.
In the gantry installation step, two interlacing rods extended from the existing gantry side in order to take a predetermined relative angle in parallel to each other or in a horizontal plane of the outer members of the two adjacent pedestals, and each other. The gantry was lowered while being guided by an extension of the outer member from a position distant in the longitudinal direction, and the distance between the existing gantry and the gantry being installed was taken by the two interlacing rods. It is a method of constructing an elevated structure in which the distances are made substantially equidistant corresponding to the parallels or different predetermined distances corresponding to the relative angles.

The invention according to claim 12 is a construction method for constructing an elevated structure according to claim 8 or 9.
The pile press-fitting process of press-fitting the tubular pile into the ground,
A gantry installation step of arranging the inner member above the tubular pile and inserting the inner member into the tubular stake while lowering the gantry.
A stage construction step of forming a stage by bridging between the outer members of the two adjacent pedestals is provided.
By repeatedly executing the pile press-fitting process, a pile row of a plurality of continuous tubular piles that are press-fitted into the ground is extended, and the pedestal installation process and the stage construction for the tubular piles constituting the pile row are extended. In extending the stage by repeating the process,
Using a pile press-fitting machine capable of self-propelling on the pile row and a crane capable of self-propelling on the pile row,
Along the extending direction of the pile row, the pile press-in machine is arranged at the head, the crane is arranged behind the pile press-in machine, and the gantry installation step and the gantry installation process for the tubular pile behind the crane. Execute the stage construction process
Materials including the tubular pile, the pedestal, and the deck are transported on the stage, and at the same time.
It is a method of constructing an elevated structure in which the crane is used to transport the material from the stage, the tubular pile is delivered to the pile press-fitting machine, and the gantry installation step and the stage construction step are executed. ..

The invention according to claim 13 comprises a first step of constructing the stage having a desired extension distance behind the crane and then removing the floor slab and the gantry behind the crane, the pile press-fitting machine, and the above. The first step, the second step, the second step of moving the crane backward, and the third step of executing the gantry installation step and the stage construction step on the tubular pile in front of the pile press-fitting machine. The method for constructing an elevated structure according to claim 12, which is repeatedly executed in the order of the third step.

According to the present invention, the gantry that supports the stage can be installed so as to project to one side by inserting the inner member into the upper end opening of a tubular pile such as a steel pipe pile, and can be stabilized by the moment of its own weight. , Elevated structures can be constructed and removed in a short time.
In addition, the width of the gantry, which is the main material, can be made smaller than the inner diameter of the tubular pile, and the inner member inserted into the tubular pile can be inserted on only one side when the insertion length is relatively long, so it is compact and lightweight, which is advantageous for transportation. Have sex.

It is a side view which shows the state of carrying out the gantry installation process which concerns on one Embodiment of this invention. It is a side view (a) which shows the state of carrying out the gantry installation process following FIG. 1, and is a side view (b) which shows the state of installing a lining plate after that. It is a side view of the elevated structure which concerns on one Embodiment of this invention. It is a perspective view of the gantry which concerns on one Embodiment of this invention. It is a plan view (a) and a side view (b) which show the connection part with the steel pipe pile of the gantry which concerns on one Embodiment of this invention. It is a bottom view which shows the connection part with the steel pipe pile of the gantry which concerns on one Embodiment of this invention. It is a perspective view of the elevated structure which concerns on one Embodiment of this invention. However, the lining board (floor slab) is excluded. It is a perspective view of the elevated structure which concerns on one Embodiment of this invention. However, the lining board (floor slab) is excluded. It is a work landscape diagram of the construction method of the elevated structure which concerns on one Embodiment of this invention. It is a plan view (a) and a side view (b) which show the kaishakunin rod which concerns on one Embodiment of this invention. It is a side view (a) and a plan view (b) which show one step in the construction method of the elevated structure which concerns on one Embodiment of this invention. It is a front view which shows one step in the construction method of the elevated structure which concerns on one Embodiment of this invention. It is a front view (a) and a partially enlarged view (b) which shows one process following FIG. It is a top view which shows the same one process as FIG. It is a top view which shows one step following FIG. It is a top view which shows one step following FIG. 16 is a plan view (a), a front partial view (b), and a front partial view (c) showing one step following FIG. Figure (c) is a time point after Figure (b). It is a top view which shows one step following FIG. It is a plan view (a) which shows one step which follows FIG. It is a top view of the convex portion forming member which concerns on one Embodiment of this invention. It is a side view of the elevated structure which concerns on another embodiment of this invention. It is a front view which shows one step in the construction method of the elevated structure which concerns on one Embodiment of this invention. It is a front view which shows one process following FIG. 22. It is a front view which shows one process following FIG. It is a front view which shows one step following FIG. 24. It is a front view which shows one process following FIG. It is a front view which shows one process following FIG. It is a front view which shows one process following FIG. 27. It is a front view (a) and the tip side view (b) which show the modification of the connection structure of a connection bar and an outer member. It is a figure which shows the connection process of the connection structure shown in FIG.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. The following is an embodiment of the present invention and does not limit the present invention.

First, the configuration of the elevated structure according to the embodiment of the present invention will be described.
As shown in FIGS. 1 to 9, the elevated structure of the present embodiment includes a gantry 2, a connecting bar 51 as a tension member, a brace 52, a lining plate 53 as a floor slab, and a slip prevention member 54 for the lining plate. It is composed of a convex portion forming member 55 or the like that forms a convex portion in the steel pipe pile 1, and constitutes a stage 60 with a lining plate 53 as a floor slab on a pile row of a plurality of steel pipe piles 1.

(Mount)
The gantry 2 is supported by the upper end of one steel pipe pile 1.
As shown in FIGS. 1 to 6, the gantry 2 is arranged inside the steel pipe pile 1 by being inserted into the outer member 20 placed on the upper end of the steel pipe pile 1 and arranged outside the steel pipe pile 1 and the upper end opening of the steel pipe pile 1. It is composed of an inner member 30.
In the present embodiment, the outer member 20 is composed of a base plate 21 and an assembly of two retaining members 22 and 23 having different lengths. Optional.
The steel pipe pile 1 constitutes an annular end face 13 surrounded by an inner circle 11 and an outer circle 12. Of the portions of the outer member 20, the portion overhanging the inner circle 11 of the steel pipe pile 1 is referred to as the overhanging portion.
The outer member 20 has a long overhanging portion 20L extending long in one direction Y1 to the outside of the outer circle 12 in a plan view, and a short overhanging portion 20S extending shortly to the outside of the inner circle 11 on the opposite direction Y2 side. .. Further, the portion between the long overhanging portion 20L and the short overhanging portion 20S is defined as 20M directly above the inner circle. The upper portion 20M directly above the inner circle is a portion arranged directly above the inner circle 11.

It suffices if the short overhanging portion 20S is overhanging to the extent that it rests on the end face 13 of the annular shape.
On the other hand, the long overhanging portion 20L is a portion that supports most of the stage 60 and overhangs for a long time.
It is a condition that the position of the center of gravity G of the gantry 2 is located outside the outer circle 12 of the steel pipe pile 1 on the Y1 side in one direction by extending the long overhanging portion 20L longer than the short overhanging portion 20S. .. As a result, a moment M for stably fixing the inner member 30 to the inside of the steel pipe pile 1 is generated.

The width of the gantry 2 is smaller than the inner diameter of the steel pipe pile 1, and the length of the long overhanging portion 20L is set to be large enough to be placed on a part of the annular end face 13 having a central angle of less than 180 degrees. The short overhanging portion 20S is also set to be large enough to rest on a part of the annular end face 13 having a central angle of less than 180 degrees. As a result, the gantry 2 can be made thinner in the width direction X. Preferably, both of them have a size such that they can be placed on a part of the annular end face 13 having a central angle of 90 degrees or less.

The upper end of the inner member 30 is connected to the lower surface of the outer member 20 across the inner circle 11. That is, it is connected to the base plate 21 on the lower surface of 20M directly above the inner circle.
The inner member 30 has a short contact portion 30S and a long contact portion 30L.
The short contact portion 30S is a portion where the long overhanging portion 20L abuts on the inner peripheral surface 11a of the steel pipe pile 1 just below the portion in contact with the end surface 13 of the annular shape, and the insertion length into the steel pipe pile 1 is relatively short. be. Since the short contact portion 30S is pushed down by the moment M, it does not float up and come off from the inside of the steel pipe pile 1, so that the insertion length into the steel pipe pile 1 may be short. It is configured to the extent that it does not come off due to vibration or the like, and that the vertical dimension of the contact surface 32 can be sufficiently taken.
The long contact portion 30L is a portion where the short overhanging portion 20S abuts on the inner peripheral surface 11a of the steel pipe pile 1 just below the portion in contact with the end surface 13 of the annular shape, and the insertion length into the steel pipe pile 1 is relatively long. be. Since the long contact portion 30L tends to be lifted by the moment M, it is lengthened so as not to come off from the inside of the steel pipe pile 1. The contact surface 34a of the long contact portion 30L is provided below the short contact portion 30S. The long contact portion 30L is long, and the contact surface 34a is arranged at a position deep from the upper end of the steel pipe pile 1, so that the moment M of its own weight and the moment due to the heavy object placed on the stage 60 cause it. The pressing force applied from the contact surface 34a to the inner peripheral surface 11a is reduced, deformation of the steel pipe pile 1 is suppressed, and the long contact portion 30L does not come off from the inside of the steel pipe pile 1.

As shown in FIG. 5, the front attachment 31 in which the short contact portion 30S and the unidirectional Y1 side portion 21a of the base plate 21 are integrated is configured. The contact surface 32 is formed by a short contact portion 30S.
The long contact portion 30L is composed of a support frame 33 and a rear attachment 34 attached to and detached from the lower end portion of the support frame 33. The contact surface 34a is formed by the rear attachment 34. The upper surface of the support frame 33 is integrally coupled with the Y2 side portion 21b in the reverse direction of the base plate 21.
As shown in FIG. 5, different front attachments 31 are configured corresponding to the diameters of the steel pipe piles 1 and replaced to correspond to the steel pipe piles 1 having different diameters. That is, in different types of front attachments 31, the curvature of the contact surface 32 and the position of the contact surface 32 when attached are different, and by exchanging these, steel pipe piles 1 having different diameters can be accommodated. Further, it is possible to change the curvature of the contact surface 34a by exchanging the rear attachment 34.

Above the contact surface 34a of the long contact portion 30L, a gap 14 is provided between the inner peripheral surface 11a of the steel pipe pile 1 and the long contact portion 30L (support frame 33) as shown in FIG. Be done. As a gantry installation process, the inner member 30 is placed above the steel pipe pile 1, and as shown in FIG. 1 (a), the gantry 2 is lowered while the long overhanging portion 20L side is facing upward and the gantry 2 is lowered. This is to facilitate the insertion of the inner member 30 into the steel pipe pile 1 as shown in b). After that, by leveling the gantry 2 as shown in FIG. 2A, the installation of the gantry 2 is completed, and a gap 14 is formed up to the upper end of the steel pipe pile 1.
Since the inner member 30 is inserted into the steel pipe pile 1 while lowering the gantry 2 in an inclined posture in this way, the rear attachment is attached to the convex portion forming member 55 previously welded to the inner peripheral surface 11a of the steel pipe pile 1. A structure can be formed in which the 34 is hooked to prevent the end portion of the gantry 2 on the Y2 side in the opposite direction from rising. That is, the convex portion forming member 55 is a member that enters the gap 14 between the support frame 33 and the inner peripheral surface 11a above the contact surface 34a and constitutes the contact surface 34a of the long contact portion 30L. It has a lower surface 55b that is hooked on the upper surface 34b of the rear attachment 34.
The upper surface 34b of the rear attachment 34 abuts on the lower surface 55b of the convex portion forming member 55. Since the steel pipe pile 1 has a dimensional error, it is designed so that there is a gap between the contact surface 34a and the inner peripheral surface 11a regardless of the present embodiment, and the Z-axis direction distance between the end surface 13 and the lower surface 55b is accurately determined. By configuring the structure, the gantry 2 can be accurately and horizontally held at the upper end of the steel pipe pile 1 even if there is a dimensional error in the inner diameter of the steel pipe pile 1. As described above, in addition to the inner peripheral surface 11a, the lower surface 55b of the convex portion forming member 55 can also be the inner surface of the steel pipe pile 1 with which the long contact portion 30L abuts, and the long abutting portion abutting with the inner surface of the steel pipe pile 1 The contact surface of 30L may be only the upper surface 34b.
As shown in FIG. 20, the convex portion forming member 55 is an arc-shaped member having a central angle of less than 180 degrees and is welded to the inner peripheral surface 11a. Therefore, as another method of executing the gantry installation process, the inner member 30 is made of a steel pipe by setting the rear attachment 34 at an angle around the central axis O that does not overlap the convex portion forming member 55 in the vertical direction Z while keeping the gantry 2 horizontal. After inserting into the pile 1, the gantry 2 can be installed even if the gantry 2 is rotated around the central axis O so that the rear attachment 34 enters under the convex portion forming member 55.

The contact surface 32 of the short contact portion 30S and the contact surface 34a of the long contact portion 30L shown in FIG. 6 may be formed in a partially cylindrical surface having a diameter equivalent to the inner diameter of the steel pipe pile 1. Here, it is formed in a partially cylindrical surface shape having a diameter smaller than the inner diameter of the steel pipe pile 1. This makes it easier to insert the inner member 30 into the steel pipe pile 1. Further, the contact surface 32 and the contact surface 34a have a radius of curvature smaller than the inner diameter of the steel pipe pile 1, but it is preferable that the radius of curvature is close to the inner diameter of the steel pipe pile 1. As a result, it is possible to prevent the steel pipe pile 1 from being distorted from a circular shape due to the pressing force received by the steel pipe pile 1 from the contact surface 32 and the contact surface 34a. Further, since the contact surface 32 and the contact surface 34a are in contact with the inner peripheral surface 11a on the surface, the fixing of the gantry 2 to the steel pipe pile 1 is stable.

As described above, the member constituting the contact surface 32 of the short contact portion 30S is the front attachment 31, and the member constituting the contact surface 34a of the long contact portion 30L is the rear attachment 34. ..
The front attachment 31 is removable, and as shown in FIG. 5A, a plurality of types of front attachments 31 having different sizes and shapes are configured corresponding to the steel pipe piles 1 having different diameters, and the front attachment 31 is formed. By exchanging with different types, for example, it is possible to cope with the difference in diameter of the steel pipe pile 1 from φ800 to φ1200. Thereby, the fitting width of the steel pipe pile 1 to the inner diameter of the steel pipe pile 1 by the short contact portion 30S and the long contact portion 30L, that is, the dimension from the contact surface 32 to the contact surface 34a can be adjusted.
Further, the rear attachment 34 is removable. The fitting width can be further finely adjusted by engaging a shim (spacer) with the fixing bolt of the rear attachment 34 and selecting the total thickness of the shim (spacer). For example, steel pipe piles having a common outer diameter and different thicknesses have a slight difference in inner diameter, and thus can be adjusted in response to such steel pipe piles.

(stage)
The stage 60 can be used as a work scaffold, a place for transporting or temporarily storing materials, a place for running or installing a work machine, or a passage regardless of other uses.
As shown in FIGS. 7 and 8, the stage 60 has two or more pedestals 2 fixed to the upper ends of two steel pipe piles 1, 1 constructed on the sides of each other, and the two adjacent pedestals 2, It is composed of a lining plate 53 erected between the outer members 20 and 20 of No. 2 (see FIG. 2B, FIGS. 3, 12, etc.). In the present embodiment, the lining plate 53 is erected between the outer members 20 and 20, but there are cases where the length of the lining plate 53 is insufficient for the distance between the outer members 20 and 20. Alternatively, a steel material may be erected between the outer members 20 and 20 and the lining plate 53 may be laid on the steel material (the longitudinal direction of the lining plate 53 may also be in the Y1-Y2 direction, etc.). May be.). That is, since the stage 60 may be formed by bridging between the outer members 20 and 20 of two adjacent pedestals, a member bridging between the outer members 20 and 20 (a member erected between the outer members 20 and 20). Does not matter. The member that bridges between the outer members 20 and 20 (the member erected between the outer members 20 and 20) may be a lining plate 53, another member, or the lining plate 53. And each of the other members.
In addition, another steel pipe pile (steel pipe pile in which the gantry 2 is not installed) may be present between the steel pipe piles 1 and 1 supporting the two adjacent pedestals 2 and 2, or 1 as in the present embodiment. There may be a space where a book or two or more steel pipe piles can be press-fitted.

(Reinforcement and others)
Further, a connecting bar 51 and a brace 52 are used as reinforcement (horizontal connecting material).
The outer members 20 and 20 of the two adjacent pedestals 2 and 2 are arranged in parallel with each other.
The connecting bar 51 is erected between the tip portions of the outer members 20 and 20 on the long overhanging side (one-way Y1 side), and is connected so as to withstand the compressive load in the longitudinal direction thereof.
The braces 52, 52 connect the two outer members 20, 20 on a diagonal line of a quadrilateral with a pair of opposite sides, and apply a tensile force to the braces 52, 52.
As described above, the quadrilateral assembly consisting of the two pedestals 2 and 2 connected to the upper ends of the two steel pipe piles 1 and 1, the connecting bar 51, and the two braces 52 and 52 is formed. Assembly stress is applied to strengthen it.
The connecting bar 51 may be erected not only between the tip portions on the long overhang side (Y1 side in one direction) but also between the opposite end portions (Y2 side end portions in the reverse direction). Reinforcement becomes even stronger.
Further, the slip prevention member 54 of the lining plate is erected and attached to the Y1 side end in one direction and the Y2 side end in the opposite direction, respectively. As shown in FIG. 3 and the like, a lining plate 53 is laid between the slip prevention members 54 and 54 on both sides.
The slip-preventing member 54 is also configured to have the material strength as a tension member and the connecting strength of the connecting portion with the gantry 2, or the connecting bar 51 and the slip-preventing member 54 are integrated as appropriate. It may be changed and implemented.

(Construction method)
Next, the method of constructing the elevated structure of the present embodiment will be described again.
(Explanation of construction method 1)
First, the method of constructing the elevated structure of the present embodiment will be described with reference to the work landscape diagram shown in FIG.
As shown in FIG. 9, the pile press-fitting process of press-fitting the steel pipe pile 1 into the ground by the pile press-fitting / pulling machine 70 is repeatedly executed while moving the press-fitting position, so that the steel pipe piles 1, 1, 1 ... The pile line will be extended.
FIG. 9 shows a method of constructing pile rows using a self-propelled adapter 73 at intervals equal to or larger than the diameter of the pile. The self-propelled adapter 73 is fixed to the upper end of the existing steel pipe pile 1 by fixing the self-propelled adapter 73 to the upper end. The pile press-fitting / pulling machine 70 crosses over the self-propelled adapter 73, and one or more piles are skipped with respect to the normal pile press-fitting pitch by the pile press-fitting / pulling machine 70 to press-fit the steel pipe pile 1. The self-propelled adapter 73 is provided with a plurality of holes that can be gripped by the clamp of the pile press-fit / pull-out machine 70 corresponding to a normal pile press-fit pitch, and the self-propelled adapters 73 are also connected to each other. The extraction machine 70 can grip and stabilize the hole of the self-propelled adapter 73 by a plurality of clamps. As a result, a gap larger than the diameter of the steel pipe pile 1 is generated between the steel pipe pile 1 and the steel pipe pile 1 adjacent to the steel pipe pile 1, and the pitch of the pile rows of the steel pipe piles 1, 1, 1 ... Can be increased. Therefore, the construction period can be shortened, and the stage 60 having a required length can be constructed in a shorter period of time.

The installation position of the convex portion forming member 55 with respect to the steel pipe pile 1 is set to a position lower than the depth (inner position) where the clamps of the pile press-fitting / pulling machine 70 and the crane 71 enter the steel pipe pile 1. This is to prevent the clamps of the pile press-fitting / pulling machine 70 and the crane 71 from interfering with the convex portion forming member 55.
Further, it is preferable that the installation position of the convex portion forming member 55 in the circumferential direction with respect to the steel pipe pile 1 is an angle having a mark that can be confirmed on the appearance of the steel pipe pile 1 and a known relative angle. For example, the outer peripheral surface at the position where the center line 55a of the convex portion forming member 55 shown in FIG. 20 and the outer peripheral surface of the steel pipe pile 1 intersect is marked with a paint or a welding member. Since the pile press-fitting / pulling machine 70 can rotate the steel pipe pile 1 around its central axis, the steel pipe pile 1 is rotated by the pile press-fitting / pulling machine 70 to reverse the position of the mark (position of the center line 55a). Turn to direction Y2.

After the construction of the pile row by the pile press-fitting process has progressed to some extent, the above-mentioned pedestal installation process is repeatedly executed for the steel pipe pile 1 constituting the pile row behind the crane 71, and the lining plate 53 is used to follow this. The stage 60 is extended by executing the stage construction step of forming the stage 60 by bridging between the outer members 20 and 20 of the two adjacent pedestals 2 and 2 and the reinforcement step of performing the above-mentioned reinforcement.

The pile press-fitting / pulling machine 70 and the crane 71 have a plurality of clamps for gripping the upper end portion of the steel pipe pile 1 from the inside. Further, the pile press-fitting / pulling machine 70 has a pile chuck that grips the steel pipe pile 1 from the outside. By re-grabbing the steel pipe pile 1 with this clamp, it is possible to cross over the pile row. That is, it is self-propelled on the pile row. Further, the pile press-fitting / pulling machine 70 can grip the steel pipe pile 1 with a pile chuck, rotate the steel pipe pile 1 and move it up and down with respect to the clamp, whereby the steel pipe pile can be press-fitted and pulled out. ..

The X direction shown in FIG. 9 is the extension direction of the pile row. A pile press-in / pull-out machine 70 is placed at the head along the extension direction X of the pile row, a crane 71 is placed behind the pile press-in / pull-out machine 70, and a gantry installation process is provided for the steel pipe pile 1 behind the crane 71. And the stage construction process (including the reinforcement process) will be executed.

As shown in FIG. 9, a self-propelled power unit 72 is arranged on the stage 60 already constructed behind the crane 71, and power is supplied from the power unit 72 to the pile press-in / pull-out machine 70 and the crane 71. The power unit 72 is a self-propelled type (vehicle) on a flat road surface.
Further, as shown in FIG. 9, a steel pipe pile 1 is placed on the stage 60 in parallel with the power unit 72. Even if the power unit 72 is placed near the crane 71 on the stage 60 in this way, the steel pipe pile 1 can be transported to the vicinity of the crane 71 on the stage 60 as well. Therefore, it is possible to maximize the working radius of the crane, and since the working radius is close, the suspension load can be increased, and therefore the length of the steel pipe pile can be increased (in the case of a joint pile, the joint points can be reduced. can). Therefore, there is a merit that the daily progress of construction increases.

Materials including the steel pipe pile 1, the gantry 2 and the lining plate 53 are transported on the stage 60 and placed on the stage 60 close to the crane 71.
A crane 71 is used to transport the materials from the stage 60, and the steel pipe pile 1 is delivered to the pile press-in / pull-out machine 70, and the gantry installation step and the stage construction step are executed. This enables efficient work.
As shown in FIG. 9, even if there is a building or the like that cannot be easily moved on one side of the pile row due to the steel pipe pile 1, the stage 60 is constructed by projecting the stage 60 on the opposite side (center side of the river K in FIG. 9). , Work scaffolding, etc. can be secured.
Further, since crawler and other work vehicles and transport vehicles can run on the stage 60, the pile press-fitting / pulling machine 70 and the crane 71 are no longer needed and can be moved on the stage 60 even after or before they are removed. By using the stage 60 as a work scaffold or as a storage place for materials, tools, and work machines, it is possible to easily perform the post-process of the structure and the construction work of the surrounding area, and the pile is press-fitted. The stage 60 can be effectively used during and after the work.

The stage 60 can be removed without the crane 71, and can be removed by using a crawler crane or the like arranged on the stage 60. One unit of the stage 60 at the head in the X direction is set as the removal target, and a crawler crane or the like is placed on the stage 60 behind the one unit to be removed to perform the work, and all of them can be sequentially retracted and removed. At that time, if it is not necessary to remove the steel pipe pile 1, the pile press-in / pull-out machine 70 and the crane 71 may have already been removed.
Further, it is possible to cut and remove the upper end portion of the steel pipe pile 1 protruding from the ground of the steel pipe pile 1 which has been removed up to the gantry 2. After removing one unit of the stage 60 at the beginning in the X direction, the upper end of the steel pipe pile 1 that supported it was cut, and it was lifted by a crawler crane placed on the rear stage 60 that had not been removed yet. The cut upper end can be carried out. Further, when removing the steel pipe pile 1, the pile press-fitting / pulling machine 70 can be pulled out and similarly carried out using the stage 60.
As described above, the stage 60 can be used as a work scaffold, a passage, or the like.

(Explanation of construction method 2)
Next, the method of constructing the elevated structure of the present embodiment will be described with reference to the process chart.
FIG. 10 shows the kaishakunin rod 80, and FIGS. 11 to 19 show process diagrams.
As shown in FIG. 10, the kaishakunin rod 80 is a rod-shaped member having a tip connecting portion 81 and a handle portion 82 at the opposite end thereof, and has an elongated hole 83 for measuring near the handle portion 82. The kaishakunin 80 is configured so that it can be used as a kaishakunin bar for manipulating the direction of the gantry 2 suspended by a crane, and as a distance between adjacent pedestals 2 and 2 being set to a certain amount.

After the pile press-fitting process, as shown in FIGS. 11 to 14, the hanging tool 93 is fixed to the gantry 2, the gantry 2 is suspended by the crane 71, and one kaishakunin rod 80 is attached to the unidirectional Y1 side end of the gantry 2. The tip connecting portion 81 is connected, and the tip connecting portion 81 of another kaishakunin rod 80 is connected to the opposite end of the gantry 2 on the Y2 side. Manipulate the posture of 2 and lower the gantry 2 while guiding it to execute the gantry installation process. The worker 90 works from the already constructed adjacent stage 60 (initially, such as the ground).
After installing the gantry 2 on the first steel pipe pile in the predetermined overhanging direction, the positioning poles 91 are set up in advance at the predetermined positions of the gantry 2 (existing pedestal) next to the gantry 2 during the installation work, and the two pedestals are set. The positioning pole 91 is inserted into each of the long holes 83 for measuring the kaishakunin rod 80. As a result, the parallelism of the outer members 20 and 20 of the two adjacent mounts 2 and 2 is ensured.
Further, the parallelism can be improved by aligning the position of the positioning pole 91 with respect to the elongated hole 83 with the two kaishakunin rods 80.

As described above, in order to make the outer members 20 and 20 of the two adjacent pedestals 2 and 2 parallel to each other, the two kaishakunin rods 80 and 80 extended from the existing pedestal 2 side are the outer members of each other. The pedestal 2 is lowered while being guided by an extension from a position extended in the longitudinal direction (Y1-Y2) of 20, and the distance between the existing pedestal 2 and the pedestal 2 being installed is the distance between the two kaishakunin rods 80. , 80 to make the distances taken by, approximately equidistant.
If a round hole that fits into the positioning pole 91 without play is used instead of the long hole 83, the pedestal 2 cannot be installed on the steel pipe pile 1 because an error cannot be tolerated, or if the pedestal 2 is forcibly installed on the steel pipe pile 1, the positioning pole 91 It is preferable to use a long hole 83 because the scale cannot be taken accurately after all. That is, a long hole 83 long in the longitudinal direction of the kaishakunin rod 80 is applied.
Further, it may be further devised such as adding a scale of the elongated hole 83. Although it can be carried out by eliminating the long hole 83 and using only the scale, it is easy for the operator to make a human error, and the long hole 83 is easier to work and secures a certain degree of accuracy.
In addition, when the outer members 20 and 20 are parallel to each other (in the case of straight line construction) and when a predetermined relative angle is taken in the horizontal plane of the outer members 20 and 20 (in the case of curved construction), the two interstitial rods 80 , 80 may be set to different predetermined distances corresponding to the relative angles. Therefore, even if the two kaishakunin rods are used, the ones that are suitable for taking the relative angle are manufactured in advance.

Next, as shown in FIG. 15, the hanger 93 is removed, the lining plate 53 is temporarily placed so that the operator can work on it, and the lining plate is displaced to the Y1 side in one direction and the Y2 side in the opposite direction. The stop member 54 is connected to the gantry 2. The connection position and connection bolt of the slip stopper 54 to the gantry 2 are the same as those used for connecting the tip connecting portion 81 of the kaishakunin rod 80 and fixing the base of the positioning pole 91. Since the kaishakunin rod 80 and the positioning pole 91 are used only during the construction work, they are simplified by standardization.

Next, as shown in FIG. 16, four lining plates 53 are installed from the Y1 side in one direction so that the operator can work on them. In the present embodiment, a total of five lining plates 53 are installed, so that one on the Y2 side in the reverse direction has not been installed yet.

Next, as shown in FIG. 17, both ends of the connecting bar 51 are connected and fixed to the unidirectional Y1 side end faces of the mounts 2 and 2 with bolts.
At this time, since the connecting bar 51 has a span adjusting portion 51b that expands and contracts to change the distance (span) between both ends, the fixing of the span adjusting portion 51b is released.
The span is adjusted by the span adjusting portion 51b, and once determined, the span adjusting portion 51b is fixed (that is, the span of the connecting bar 51 is fixed).
After that, both ends of the connecting bar 51 are fastened to the mounts 2 and 2 with bolts.

Next, as shown in FIG. 18, the brace 52 having one end connected to the gantry 2 and the other end freed and held is pulled out, and the other end of the brace 52 is connected to the gantry 2 with a clevis pin 96 as shown in FIG. Then, the tension of the brace 52 is adjusted with the turnbuckle 52a.
Next, install the remaining one lining plate.
With the above, the floor portion of the stage 60 is completed, but further necessary steps such as fixing the handrail to the lining plate 53 are performed.

(Explanation of construction method 3)
Next, the method of constructing the elevated structure of the present embodiment will be described with reference to the process diagrams of FIGS. 22 to 28.

It is assumed that the steel pipe pile 1 is repeatedly press-fitted into the ground by the pile press-fitting / pulling machine 70 described above, and the pile row is extended to the steel pipe pile 1A as shown in FIG. That is, it is assumed that the first pile in the extension direction X of the pile row is the steel pipe pile 1A. Then, it is assumed that the pile row of the plan is press-fitted in this situation. Further, it is assumed that there is no ground area in which the pile press-fitting / pulling machine 70 and the crane 71 can be moved in the X direction. For example, in a mountainous area, an urban area, etc., there may be an obstacle in the X direction of the pile press-in / pull-out machine 70, or a pile row may be extended from the shore over a lake or the ocean to stop offshore.
In such a case, there are the following two problems.
One is that the stage 60 cannot be extended to the steel pipe pile 1A-1G occupied by the pile press-fitting / pulling machine 70 and the crane 71.
The other one is how to remove the pile press-fitting / pulling machine 70 and the crane 71.

The construction method for solving the above problems will be described below.
First, the main points are the first step of removing the lining plate 53 and the gantry 2 (including reinforcement and auxiliary tools; the same applies hereinafter) behind the crane 71, and the second step of moving the pile press-fitting / pulling machine 70 and the crane 71 backward. And the third step of executing the gantry installation step and the stage construction step for the steel pipe pile 1 in front of the pile press-fitting / pulling machine 70 are repeatedly executed in the order of the first step, the second step, and the third step.
Next, it will be described with reference to the figure. If the self-propelled adapter 73 is not used, the part related to the self-propelled adapter 73 is unnecessary.

As shown in FIG. 23, the lining plate 53 and the gantry 2 supported by the steel pipe pile 1H behind the pile press-fitting / pulling machine 70 and the crane 71 are removed, and the crane 71 can move backward to the steel pipe pile 1H (self-propelled to the steel pipe pile 1H). Adapter 73 can be installed). The removed material can be temporarily placed on the stage 60 further behind. The pile press-fitting / pulling machine 70 is retracted to the steel pipe pile 1C-1D so that the stage can be constructed on the steel pipe pile 1A-1B in front of the pile press-fitting / pulling machine 70 (self-propelled adapter 73 can be removed).
Next, as shown in FIG. 24, the self-propelled adapter 73 held in the steel pipe pile 1B in front of the pile press-fitting / pulling machine 70 is removed and attached to the steel pipe pile 1H.
Next, as shown in FIG. 25, the gantry installation process is executed on the steel pipe pile 1A.
Next, as shown in FIG. 26, the pile press-in / pull-out machine 70 and the crane 71 are moved backward, the lining plate 53 and the gantry 2 supported by the steel pipe pile 1I are removed, and the steel pipe pile 1C in front of the pile press-in / pull-out machine 70 is further removed. The self-propelled adapter 73 held in the steel pipe pile 1I is removed, attached to the steel pipe pile 1I, and the gantry installation step is executed on the steel pipe pile 1B. The work by the worker 90 using the kaishakunin 80 is performed from the scaffolding attached to the pile press-fitting / pulling machine 70, and the overhanging direction of the gantry 2 can be measured with reference to the pile press-fitting / pulling machine 70. After the stage 60 is formed on the front side of the pile press-fitting / pulling machine 70, the kaishakunin rod 80 can be extended backward from the stage 60 in front of the stage 60.
Next, as shown in FIG. 27, a stage construction step is executed between the steel pipe piles 1A-1B.
Further, the above removal of the rear stage (first step), reverse movement (second step), and construction of the front stage (second step) are repeatedly executed, and the pile press-fitting / pulling machine 70 and the crane 71 move out of the pile row. By the time you do, you can build the stage 60 from end to end of the pile row.
As described above, the stage 60 can be extended to the leading steel pipe pile 1A, and the pile press-fitting / pulling machine 70 and the crane 71 can be removed. Further, since the elevated structure by the gantry 2 or the like of the present embodiment can be constructed and removed in a short time, the time required for the pile press-fitting / pulling machine 70 and the crane 71 to move backward for a certain distance can be suppressed in a relatively short time. be able to.

(Summary, others)
According to the above embodiment, it is possible to construct an elevated structure overhanging to one side with respect to the steel pipe pile 1. However, as shown in FIG. 21, a pedestal 2B inserted into each of the vertically divided halves of the steel pipe pile 1 can be configured, and beams overhanging on both sides can be configured by the pedestals 2B and 2B oriented in opposite directions.
Further, according to the above embodiment, the gantry 2 can be easily installed and the elevated structure can be constructed and removed in a short time.
Further, according to the above embodiment, the inner member 30 does not need to be fitted inside the steel pipe pile 1 at 360 degrees, and only the long contact portion 30L is required for the portion having a long insertion length, as in the present embodiment. Since the width of the gantry 2 can be smaller than the inner diameter of the tubular pile (1), the gantry 2 can be made small and lightweight, which is advantageous for transportation and the like.
It is also possible to carry out without applying the convex portion forming member 55. In that case, the dimension of the contact surface 34a in the vertical direction Z may be lengthened so that the upper end of the rear attachment 34 is brought closer to the base plate 21, but the inner member 30 is inserted into the steel pipe pile 1 by tilting as shown in FIG. A gap 14 (see FIG. 2) is left in the lower portion of the base plate 21 for ease of use. Further, the narrow lower end of the inner member 30 (support frame 33) also makes it easier to insert the inner member 30 into the steel pipe pile 1.

Further, the outer member 20 may not be provided with the short overhanging portion 20S, and the Y2 side in the opposite direction of the outer member 20 may be formed so as to fit within the inner circle 11 in a plan view. That is, in FIG. 3, the outer member 20 is formed only by the long overhanging portion 20L and the inner circular upper portion 20M without providing the short overhanging portion 20S. Even in this way, the gantry 2 is stabilized by being engaged with the steel pipe pile 1 by the lower surface of the long overhanging portion 20L, the contact surface 32, and the contact surface 34a due to the action of its own weight and its own weight moment M. be able to.
However, if the short overhanging portion 20S is provided, when the lower surface of the short overhanging portion 20S comes into contact with the upper end of the steel pipe pile 1 at the stage shown in FIG. You can start the rotation to return to the horizontal. Since the gantry 2 is supported by the crane during this rotation, a large load is not applied to the steel pipe pile 1 from the short overhanging portion 20S. On the other hand, when the installation of the gantry 2 is completed, there is almost no load from the short overhanging portion 20S to the steel pipe pile 1. Therefore, even if the short overhanging portion 20S is provided to function as the fulcrum, the area of the short overhanging portion 20S in a plan view may be extremely small within a range sufficient to function as the fulcrum. The short overhanging portion 20S is not limited to the one shown in the drawing, and is not limited to the one that includes the direction directly opposite to the overhanging direction Y1 of the long overhanging portion 20L, and is not limited to the one that overhangs, for example, from 30 degrees with respect to the opposite direction. It may be divided into two parts on the side of about 60 degrees. This is because even in this case, it functions as the fulcrum.

In the above embodiment, the connecting bar 51 and the brace 52 are used as the horizontal connecting material, but as the horizontal connecting material, for example, between the tips of the outer members 20 and 20 on the long overhanging side (one-way Y1 side) and between the tips. It may be a connecting bar (without braces) placed on both sides between the opposite ends.
When the lining plate 53 is erected between the outer members 20 and 20, the lining plate 53 may be used as a horizontal connecting material after ensuring rigidity, connection strength, and the like. In addition, the horizontal connecting material may be any material as long as it can connect the outer members 20 and 20 to ensure the required rigidity, strength, and the like.

In the above embodiment, from the middle of the pile press-fitting process, the pedestal installation process and subsequent steps were carried out for the steel pipe piles 1 constituting the pile row, but regardless of this, in order to construct the elevated structure of the present invention. May carry out the gantry installation process on the already completed pile rows. Further, the already completed pile row is not limited to the pile row that has been press-fitted, and may be a pile row constructed by any construction method.

Further, instead of the connecting structure of the connecting bar 51 and its outer members 20 and 20 of the above embodiment, for example, the structures shown in FIGS. 29 and 30 may be implemented.
As shown in FIG. 29, the connecting bar 51B is connected between the outer members 20 and 20 via the connecting plate 51C. Both ends of the connecting bar 51B are connected to the outer member 20 via the connecting plate 51C, respectively. The connecting plate 51C extends above the upper surface of the outer member 20 and is connected to the connecting bar 51B at a position above the upper surface of the lining plate 53.
As shown in FIG. 30 (a), the connecting bar 51B is lowered, and as shown in FIG. 30 (b), the connecting bar 51B is supported by the connecting plate 51C, and then the connecting plate 51C and the connecting bar 51B are formed. With bolts. Since this work can be performed at a position above the upper surface of the lining plate 53, the work is easy and safe. The connecting plate 51C is fixed to the tip of the outer member 20 of the gantry 2 on the long overhanging side (one-way Y1 side) in advance before the gantry installation process.

1 Steel pipe pile 2 Stand 11 Inner circle 11a Inner peripheral surface 12 Outer circle 13 Circular end face 14 Gap 20 Outer member 20L Long overhang part 20S Short overhang part 21 Base plate 30 Inner member 30L Long contact part 30S Short contact part 31 Front attachment 32 Contact surface 33 Support frame 34 Rear attachment 34a Contact surface 51 Connecting bar 52 Brace 53 Lining plate 54 Slip prevention member for lining plate 55 Convex forming member 60 Stage 70 Pile press-fitting / pulling machine 71 Crane 72 Power unit 73 Self-propelled adapter 80 Intersection rod 81 Tip connecting part 83 Long hole for scale 90 Worker 91 Positioning pole G Center of gravity of pedestal K River M Self-weight moment of pedestal

Claims (13)

An outer member as a cantilever deck receiving girder that rests on the upper end of the tubular pile and is placed outside the tubular pile, and is inserted into the upper end opening of the tubular pile and placed inside the tubular pile. Equipped with a pedestal consisting of internal members
An elevated structure in which the inner member is inserted into the tubular pile in a state where the outer member and the inner member are integrally connected.
The upper end of the tubular pile constitutes an annular end face surrounded by an inner circle and an outer circle.
In a plan view, the outer member has a long overhanging portion that extends long in one direction to the outside of the outer circle, and a short overhanging portion that extends shortly to the outside of the inner circle is provided on the opposite side. It is formed so as to fit inside the inner circle, and the center of gravity of the gantry is located outside the one-way side of the outer circle.
The long overhanging portion rests on a part of the annular end face having a central angle of less than 180 degrees.
When the short overhanging portion is provided, the short overhanging portion is placed on a part of the annular end face having a central angle of less than 180 degrees.
The upper end of the inner member is coupled to the lower surface above the inner circle of the outer member.
Said member includes a short abutment the elongated projecting portion abuts against the inner surface of the tubular pile immediately below the portion contacting the end face of the annular, the tubular pile in the opposite side of the short contact portion An elevated structure having a long contact portion that abuts on an inner surface and has an insertion length into the tubular pile that is longer than the short contact portion. The long overhanging portion rests on a part of the annular end face having a central angle of 90 degrees or less.
The elevated structure according to claim 1, wherein when the short overhang is provided, the short overhang is partly placed on a part of the annular end face having a central angle of 90 degrees or less. The contact surface of the long contact portion is provided below the short contact portion, and a gap is provided between the inner surface of the tubular pile and the long contact portion above the contact surface. The elevated structure according to claim 1 or 2. The third aspect of claim 3 has a convex portion forming member having a convex portion forming an inner surface of the tubular pile having a convex portion having a lower surface that enters the gap and is hooked on the upper surface of the member constituting the contact surface of the long contact portion. Elevated structure. Any of claims 1 to 4, wherein the contact surface of the short contact portion and the contact surface of the long contact portion are formed in a partially cylindrical surface having a diameter smaller than the inner diameter of the tubular pile. The elevated structure described in Kaichi. At least one of the member constituting the contact surface of the short contact portion and the member constituting the contact surface of the long contact portion is based on the short contact portion and the long contact portion. The elevated structure according to any one of claims 1 to 5, which is removable so that the fitting width to the inner diameter of the tubular pile can be adjusted. The elevated structure according to any one of claims 1 to 6, wherein the width of the gantry is smaller than the inner diameter of the tubular pile. It has two or more of the pedestals fixed to the upper ends of the two tubular piles constructed on the sides of each other.
The elevated structure according to any one of claims 1 to 7, wherein a stage is formed by bridging between the outer members of two adjacent pedestals. The elevated structure according to claim 8, wherein the outer members of the two adjacent pedestals are arranged in parallel with each other or at a predetermined relative angle in a horizontal plane, and are connected via a horizontal connecting member. The construction method for constructing the elevated structure according to any one of claims 1 to 9.
The inner member is arranged above the tubular pile, the inner member is inserted into the tubular pile while lowering the gantry in an inclined posture with the long overhanging portion side upward, and then the gantry is horizontally placed. How to build an elevated structure with a pedestal installation process. The construction method for constructing the elevated structure according to claim 8 or 9.
The inner member is placed above the tubular pile, and the inner member is inserted into the tubular pile while lowering the gantry in an inclined posture with the long overhanging portion side facing up, and then the gantry is placed horizontally. The pedestal installation process and
A stage construction step of forming a stage by bridging between the outer members of the two adjacent pedestals is provided.
In the gantry installation step, two interlacing rods extended from the existing gantry side in order to take a predetermined relative angle in parallel to each other or in a horizontal plane of the outer members of the two adjacent pedestals, and each other. The gantry was lowered while being guided by an extension of the outer member from a position distant in the longitudinal direction, and the distance between the existing gantry and the gantry being installed was taken by the two interlacing rods. A method for constructing an elevated structure in which the distances are substantially equidistant corresponding to the parallels or different predetermined distances corresponding to the relative angles. The construction method for constructing the elevated structure according to claim 8 or 9.
The pile press-fitting process of press-fitting the tubular pile into the ground,
A gantry installation step of arranging the inner member above the tubular pile and inserting the inner member into the tubular stake while lowering the gantry.
A stage construction step of forming a stage by bridging between the outer members of the two adjacent pedestals is provided.
By repeatedly executing the pile press-fitting process, a pile row of a plurality of continuous tubular piles that are press-fitted into the ground is extended, and the pedestal installation process and the stage construction for the tubular piles constituting the pile row are extended. In extending the stage by repeating the process,
Using a pile press-fitting machine capable of self-propelling on the pile row and a crane capable of self-propelling on the pile row,
Along the extending direction of the pile row, the pile press-in machine is arranged at the head, the crane is arranged behind the pile press-in machine, and the gantry installation step and the gantry installation process for the tubular pile behind the crane. Execute the stage construction process
Materials including the tubular pile, the pedestal, and the deck are transported on the stage, and at the same time.
A method for constructing an elevated structure in which the crane is used to transport the materials from the stage, and the tubular piles are delivered to the pile press-fitting machine, and the pedestal installation step and the stage construction step are executed. A first step of constructing the stage with a desired extension distance behind the crane and then removing the deck and the gantry behind the crane, and a second step of moving the pile press-in machine and the crane backward. , The third step of executing the gantry installation step and the stage construction step on the tubular pile in front of the pile press-fitting machine is repeated in the order of the first step, the second step, and the third step. The method for constructing an elevated structure according to claim 12 to be executed.

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