JP4286737B2 - Construction method of pier - Google Patents

Description

  The present invention belongs to a technical field of a method for constructing a pier such as a road bridge and a railway bridge, and more specifically, relates to a method for constructing a pier rapidly to a stage where superstructure can be constructed.

Non-Patent Document 1 states that a steel pipe pile is placed and then a steel pipe with an external rib is directly welded to the steel pipe pile as a temporary support. It is described that the superstructure can be constructed as a pier that can be constructed.
Civil Engineering Technology Vol.59, No.4, pages 79-82

  The construction method of Non-Patent Document 1 can be noted that the steel pier pile and the outer rib can be constructed by simply welding the steel pipe with the outer rib as a temporary support to the cast steel pipe pile and starting it up. Since welding work with steel pipes in the field depends on the weather, it is an obstacle to shortening the construction period and there is also a problem in quality assurance of welding.

  The purpose of the present invention is to secure the strength and rigidity required for the bridge pier as a part of the structure of the foundation pile by building a structural pillar that supports the bridge girder and integrating it into a rigid structure. The purpose is to provide a rapid pier construction method that enables superstructure work such as erection.

  The object of the present invention is to eliminate the need for concrete footing, or to make it as small as necessary. Therefore, it is less likely to limit the road width on the ground as a pier of a bridge, contributing to the mitigation or elimination of traffic congestion. It is to provide a method for building a pier.

As a means for solving the problems of the prior art, the construction method of the pier according to the invention described in claim 1 is:
A method for constructing a pier 2 such as a road bridge 1 or a railway bridge,
The ground is excavated, a reinforcing bar 4 is inserted therein, the concrete 5 is filled, the foundation pile 3 of the bridge pier 2 is placed, and the concrete column 6 is replaced with the concrete 5 at the initial stage of curing the concrete 5. comprising the steps of: forming a steel reinforced concrete piles like an anchor into the rebar cage 4,
At the stage where the concrete 5 has developed a certain strength, the upper ends of the bridge pillars 6 and 6 of the pier 2 are connected by a girder 7 to construct the foundation pile 3, the mast pillar 6 and the girder 7 . The bridge pier 2 including the body is constructed such that superstructure work such as erection of the bridge girder 8 on the beam support 7 is possible.

The construction method of the pier according to the invention described in claim 2 is:
A method for constructing a pier 2 such as a road bridge 1 or a railway bridge,
The ground is excavated, a reinforcing bar 4 is inserted therein, the concrete 5 is filled, the foundation pile 3 of the bridge pier 2 is placed, and the concrete column 6 is replaced with the concrete 5 at the initial stage of curing the concrete 5. comprising the steps of: forming a steel reinforced concrete piles like an anchor into the rebar cage 4,
At the stage where the concrete 5 has developed a certain strength, the upper ends of the bridge pillars 6 and 6 of the pier 2 are connected by a girder 7 to construct the foundation pile 3, the mast pillar 6 and the girder 7. Constructing the bridge pier 2 including the body so that the construction of the superstructure such as erection of the bridge girder 8 on the girder support 7 is possible,
Construction work in which the foundation piles 3 and 3 are connected to each other by a footing 10, and the structural pillars 6 and 6 are firmly fixed to each other with concrete 11 and reinforced, and a bridge girder 8 is erected on the girder 7. It is characterized by proceeding with construction in parallel.
The invention described in claim 3 is the construction method of the pier according to claim 2,
The foundation piles 3 and 3 are connected to each other by the footing 10, and the construction columns 6 and 6 are firmly connected to each other by the steel beam 12 and the brace 13, and the bridge girder 8 is installed on the girder 7. It is characterized by proceeding in parallel with the superstructure construction.
The invention described in claim 4 is the construction method of the pier according to claim 2 or 3,
Without connecting the foundation piles 3 and 3 by footing, the structural pillars 6 and 6 are solidified with concrete 10 or the structural pillars 6 and 6 are firmly connected by the steel beam 12 and the brace 13 for reinforcement. It is characterized by doing.

  In the method for constructing a pier according to the present invention, a structural pillar supporting a bridge girder is built as a part of a structure of a foundation pile, and the strength and rigidity required for a pier are integrated. By connecting the upper ends of the structural pillars with a girder, the construction can be rapidly advanced to the stage where the superstructure such as a bridge girder can be constructed immediately. Therefore, after that, the construction work for the superstructure and the work for completing the pier can be carried out in parallel, and the construction period can be dramatically shortened.

  Since the strength and rigidity required for the pier can be basically secured by the foundation pile and the structural pillar, the concrete footing can be made useless or can be made as small as necessary. Therefore, there is little restriction on the road width as a pier of the bridge, and it can contribute to alleviation or elimination of traffic congestion.

  An embodiment of a pier construction method (hereinafter sometimes simply referred to as a construction method) according to the invention described in claims 1 and 2 will be described with reference to FIGS. The construction method of the present invention is suitably implemented as a method of constructing a pier 2 of a road bridge 1 (as well as a railway bridge, for example) as shown in FIG.

  Specifically, as shown in FIG. 2, first, in order to place foundation piles 3..., A ground at a predetermined position is excavated, and a reinforcing bar 4 is inserted therein to fill concrete 5.

  At the initial stage of curing the concrete 5, as shown in FIG. As a result, the foundation pile 3 becomes a steel-framed reinforced concrete pile and the H-shaped steel 6 is firmly integrated as a part of the structure, so that the strength and rigidity required for the pier 2 can be secured. . When the concrete 5 exhibits a certain strength, the upper ends of the H-shaped steels 6 and 6 are connected by a girder 7 (see FIG. 4). In this way, the construction has progressed rapidly to the stage where construction of so-called superstructure such as erection of the bridge girder 8 on the girder 7 is possible. Therefore, the construction period can be dramatically shortened.

  Incidentally, the H-section steel 6 of the present embodiment has a stud 9 on a flange or the like as shown in FIG. 5, and depends on the adhesion force of the outer peripheral surface of the H-section steel 6 to the concrete 5 and the resistance force of the stud 9. It is firmly integrated with the concrete 5.

  After that, as shown in FIG. 6, superstructure work such as erection of bridge girder 8 on girder 7, foundation piles 3 and 3 are connected with footing 10, and H-section steels 6 and 6 The construction of the substructure that hardens and reinforces each other with concrete 11 can proceed in parallel. As described above, since the strength and rigidity required for the pier 2 are already secured by the structure composed of the foundation pile 3 and the H-shaped steel 6, the footing 10 can be made as small as necessary. . Therefore, there is little restriction on the road width as a pier of the road bridge 1, and it can contribute to the mitigation or elimination of traffic congestion during construction.

  However, the footing 10 can be omitted depending on the design strength of the structural pillar and the reinforcing effect of concrete or the like that reinforces the structural pillar.

In the embodiment described above, the bridge pier 2 is hardened and reinforced with the concrete 11, but this is not restrictive. As shown in FIG. 7, it can be similarly implemented as a steel structure in which adjacent H-section steels 6 and 6 as a structural pillar are firmly connected and reinforced by a steel beam 12 and a brace 13 (claim 3 ). invention). In addition, the bracing 13 can be omitted when the strength and rigidity required for the pier 2 can be ensured only by reinforcing with the beam 12.

  In the above embodiment, the H-section steel 6 is employed as the structural pillar, but this is not restrictive. Generally, any steel material may be used as a structural pillar. For example, as shown in FIG. 8, a square steel pipe 14 having a stud 9 on the outer peripheral surface (however, the cross-sectional shape may be round) is adopted. May be. Even in this case, it is firmly integrated as a part of the structure of the foundation pile 3 by the adhesion force of the outer peripheral surface of the steel pipe 14 to the concrete 5 and the resistance force of the stud 9.

  Although not particularly mentioned in the above embodiment, when placing a plurality of foundation piles 3 on one pier 2, at least two pairs are arranged in a face-to-face arrangement with the foundation piles 3. Build a true pillar.

  In the above embodiment, the studs 9 are provided on the outer peripheral surfaces of the H-section steel 6 and the steel pipe 14, but may be omitted if the adhesion force to the concrete 5 is large.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and can be implemented in various forms without departing from the gist of the present invention.

It is the front view which showed an example of the road bridge. It is sectional drawing which showed notionally the process of driving a foundation pile. It is sectional drawing which showed notionally the process of building a construction pillar in a foundation pile. It is sectional drawing which showed notionally the process of connecting the upper end part of a construction pillar mutually with a girder. A is the front view which showed the H-section steel which is a true pillar. B is a cross-sectional view of A. FIG. It is sectional drawing which showed notionally the process which advances simultaneously the superstructure which constructs a bridge girder, and the substructure which connects foundation piles with footings, and also solidifies and strengthens H section steel with concrete. . 1 is a perspective view conceptually showing a steel pier. It is the perspective view which showed the steel pipe which is a construction pillar.

Explanation of symbols

1 Road Bridge 2 Pier 3 Foundation Pile 6 H-section Steel (Structure Column)
7 Girder holder 8 Bridge girder 11 Concrete 12 Steel 14 Steel pipe (Structure column)

Claims (4)

A method of building piers such as road bridges and railway bridges,
Excavate the ground, insert a reinforcing bar into it, fill the concrete and drive the foundation pile of the pier, and build the built-up column into the concrete reinforcing bar at the initial stage of curing the concrete A stage with a built-in steel-framed reinforced concrete pile,
At the stage where the concrete has developed a certain strength, the upper ends of the bridge pillars are connected with a girder, and the bridge pier including the foundation pile, the mast column and the girder as a structure is included in the girder. A construction method for bridge piers, which is constructed to allow construction of superstructure such as erection of bridge girder on top of the bridge. A method of building piers such as road bridges and railway bridges,
Excavate the ground, insert a reinforcing bar into it, fill the concrete and drive the foundation pile of the pier, and build the built-up column into the concrete reinforcing bar at the initial stage of curing the concrete A stage with a built-in steel-framed reinforced concrete pile,
At the stage where the concrete has developed a certain strength, the upper ends of the bridge pillars are connected with a girder, and the bridge pier including the foundation pile, the mast column and the girder as a structure is included in the girder. A stage where construction of superstructure such as erection of a bridge girder on top of it is possible,
The foundation piles are connected to each other by footing, and the construction column is fixed with concrete and reinforced, and the construction of the superstructure such as erection of bridge girder on the girder is advanced in parallel. The construction method of the bridge pier that is characteristic.   The foundation piles are connected to each other by footing, and the construction column is firmly connected to each other by steel beams and braces to reinforce and the superstructure work such as erection of bridge girder on the girder support is performed in parallel. The method for constructing a pier according to claim 2, wherein the method is advanced.   The structural columns are solidified with concrete each other without being connected to each other by footing, or the structural columns are firmly connected and reinforced by steel beams and braces. The construction method of the pier described in 2.

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