JP7269197B2 - ROAD STRUCTURE AND METHOD FOR MANUFACTURING ROAD STRUCTURE - Google Patents

Description

The present invention relates to a road structure and a method for manufacturing the road structure.

A method for constructing an underpass is disclosed in which a wall is provided on the ground, a girder is erected on the upper frame head of the wall, and a pressure plate is installed at a predetermined interval below the girder (Patent document 1). Also disclosed is a bridge construction method in which a plate-like foundation frame is arranged along the ground, a plurality of legs are installed on the foundation frame, and a bridge that allows vehicles to pass is installed on the upper end of the leg. (Patent Document 2). Further, a method of constructing a bridge body by installing columns on an existing traffic road and attaching a top slab to the top of the columns is disclosed (Patent Document 3).

JP 2007-308995 A JP-A-2004-76368 JP 2004-316295 A

By the way, in a structure in which walls and supports are provided on the ground, it is necessary to construct the walls and supports that are larger than the piles, which prolongs the construction period and increases the construction cost. In addition, in a configuration in which a bridge is installed on the ground, an underground space cannot be effectively utilized. Therefore, there is a demand for a technology that can provide a road structure with a low construction cost and sufficient structural strength.

One aspect of the present invention includes a plurality of piles driven so as to have a protrusion with respect to the base, a lower precast plate fixed across the piles at the lower part of the protrusion, and the and an upper precast slab fixed across the piles on the upper part of the projecting part, and a space is provided between the upper precast slab and the lower precast slab.

Here, it is preferable that the lower precast plate is placed directly above the surface of the base.

Further, it is preferable that an injection solidifying agent is filled between the lower precast plate and the base.

Another aspect of the present invention includes a first step of driving a plurality of piles into the ground, a second step of fixing a lower precast plate across the piles at a lower portion of the protrusion of the pile, and the lower precast and a third step of fixing the upper precast plate across the piles at the upper part of the protrusion so that a space is provided between the road structure and the plate. is.

Another aspect of the present invention is a first step of driving a plurality of piles into the ground, a second step of fixing an upper precast plate across the piles at the top of the piles, and the upper precast plate. A fourth step of fixing a lower precast plate across the piles at the lower part of the protrusion of the piles so that a space is provided between them. be.

Here, the method of manufacturing a road structure, wherein the pile and the lower precast slab are joined by fixing the lower precast slab to a flange projecting radially from the pile.

Also, in the second step, it is preferable to dispose the lower precast plate immediately above the surface of the base.

Further, it is preferable to include a fourth step of filling a gap between the lower precast plate and the base with an injection solidifying agent between the second step and the third step.

According to the present invention, it is possible to provide a road structure with low construction cost and sufficient structural strength.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the structure of the road structure in embodiment of this invention. It is a side view showing composition of a road structure in an embodiment of the invention. It is a figure which shows the construction method (manufacturing method) of the road structure in embodiment of this invention. It is a figure which shows the construction method (manufacturing method) of the road structure in embodiment of this invention.

The road structure 100 according to the embodiment of the present invention includes a plurality of piles 12 that are driven into the ground, the floor, etc. that serve as the ground, protruding from the base 10, and a concrete precast slab 14 that is fixed and supported by the piles 12 ( An upper precast plate 14a and a lower precast plate 14b).

The piles 12 are used as pillars for supporting the concrete precast slabs 14 . The piles 12 are made of a material such as metal or concrete that has mechanical strength for supporting the concrete precast slab 14 . The pile 12 has a columnar shape such as a cylinder, a square column, or a cylinder. The pile 12 is in a state in which a portion of the pile 12 has a protruding portion that protrudes from the base portion 10 .

In this embodiment, the piles 12 are driven into the ground, and then the ground is excavated to make a part of the piles 12 protrude from the base 10 . Thereby, the road structure 100 is arranged in the underground space and the underground space is utilized. In addition, in FIG. 1, in order to clarify the explanation, the base 10 is hatched so that other structures can be seen through.

The concrete precast slab 14 is a concrete plate that is manufactured in advance in a factory or the like for on-site assembly and installation. The concrete precast slab 14 may have a structure in which the ends and the inside are reinforced with steel frames or reinforcing bars. In this embodiment, as the concrete precast slabs 14, an upper precast slab 14a and a lower precast slab 14b are provided.

The upper precast plate 14a is fixed and supported on the upper part of the protrusion of the pile 12 driven into the base 10. As shown in FIG. The upper precast slab 14 a can be used as infrastructure such as roads and floors in the road structure 100 . That is, the surface of the upper precast plate 14a can be used as a road surface or a floor surface so that vehicles, people, and the like can come and go on the surface.

The lower precast plate 14b is fixed to and supported by the lower portion of the protrusion of the pile 12 driven into the base 10. As shown in FIG. By connecting the piles 12 with the lower precast plate 14b, a box culvert structure is formed in which the piles 12 are connected by the upper precast plate 14a and the lower precast plate 14b, and the structural strength of the road structure 100 can be increased.

Further, in the road structure 100, a space is formed between the bottom surface of the upper precast slab 14a and the top surface of the lower precast slab 14b. The space can be used as a free access space. The free access space can be used as an installation space for infrastructure equipment such as electric wires, communication lines, water pipes, sewage pipes, gas pipes, and the like. The free access space can also be used as a space for installing sensors, wiring and control devices for grasping the situation of the road structure 100 . Furthermore, since the lower precast slab 14b can be used as the floor of the free access space, work in the free access space is facilitated.

When constructing an infrastructure by combining a plurality of concrete precast plates 14, a grout material may be injected between the adjacent concrete precast plates 14 to fill the gaps.

Alternatively, the lower precast slab 14b may be installed directly above the surface of the base 10 that serves as the foundation of the road structure 100, as shown in the side view of FIG. Thereby, the lower precast slab 14b can be directly supported by the base 10, and the structural strength of the road structure 100 can be enhanced.

Furthermore, the bottom surface of the lower precast plate 14b is in surface contact with the surface of the base 10 over a wide area, thereby preventing the piles 12 coupled with the lower precast plate 14b from sinking into the base 10. In particular, the load on the upper precast plate 14a can be received not only by the piles 12 but also by the lower precast plate 14b, so that the piles 12 can be prevented from sinking and the load bearing capacity of the road structure 100 can be increased. As a result, the embedded length of the pile 12 with respect to the base portion 10 can be reduced.

Here, the gap between the bottom surface of the lower precast plate 14b and the surface of the base 10 may be filled with the injection solidifying agent 16. As shown in FIG. The injection hardening agent can be grout, mortar, or the like. In this case, a through hole may be provided from the front surface to the back surface of the lower precast plate 14b for filling the injection solidifying agent 16. FIG. By filling the gap between the bottom surface of the lower precast plate 14b and the surface of the base 10 in this way, the lower precast plate 14b can be supported more firmly by the base 10, and the structural strength of the road structure 100 can be increased. can be higher. Furthermore, the load resistance of the road structure 100 can be further enhanced.

Hereinafter, a construction method (manufacturing method) of the road structure 100 will be described with reference to FIG.

In step S10, a step of driving piles 12 into the ground is performed. A required number of piles 12 are driven at intervals required for fixing the upper precast plate 14a and the lower precast plate 14b.

In step S12, the process of fixing the upper precast plate 14a to the upper part of the pile 12 is performed. The upper precast plate 14a is fixed across the plurality of piles 12 so that a space is provided between the upper precast plate 14a and the lower precast plate 14b. Here, as shown in FIG. 2, flanges 12b may be provided at the upper ends of the plurality of piles 12, and the ends of the upper precast plate 14a may be fixed to the flanges 12b. The flange 12b may have an adjustment mechanism for adjusting the height of the pile 12. FIG.

In step S14, a step of excavating the ground below the upper precast plate 14a is performed. Excavation is performed up to an intermediate portion of the pile 12 driven into the ground. As a result, part of the upper side of the pile 12 protrudes from the base 10 .

In step S16, a step of fixing the lower precast plate 14b to the lower portion of the projecting portion of the pile 12 is performed. Here, as shown in FIG. 2, a flange 12a projecting in the radial direction is provided at the lower part of the protrusion of the pile 12, and the end of the lower precast plate 14b is attached to the flange 12a so as to straddle the plurality of piles 12. It may be fixed. Also, the lower precast slab 14b may be arranged directly above the surface of the base 10 that serves as the foundation of the road structure 100 .

In step S18, a step of filling the injection solidifying agent 16 between the bottom of the lower precast plate 14b and the surface of the base 10 is performed. By pouring the injection solidifying agent 16 from the through hole provided in the lower precast plate 14b or the gap between the lower precast plate 14b and the pile 12, the injection solidifying agent is formed between the bottom portion of the lower precast plate 14b and the surface of the base portion 10. Fill 16.

As shown in FIG. 4, the ground is excavated in step S14, the lower precast plate 14b is fixed to the lower part of the protrusion of the pile 12 in step S16, and the upper precast plate 14a is attached to the upper part of the protrusion of the pile 12 in step S12. Construction may be performed in the order of fixing.

As described above, according to the road structure 100 of the present embodiment, it is possible to provide a road structure with a low construction cost and sufficient structural strength. In particular, by providing the lower precast slab 14b, the structural strength of the road structure 100 can be further enhanced.

10 base, 12 pile, 12a flange, 12b flange, 14 concrete precast plate, 14a concrete precast plate 14 (upper precast plate, 14a upper precast plate, 14b lower precast plate, 16 injection hardening agent, 100 road structure.

Claims (12)

a plurality of piles driven to have projections relative to the base;
A lower precast plate fixed across the piles at the lower part of the protruding part and placed in surface contact with the base or directly above the base ;
An upper precast plate fixed across the piles at the upper part of the protrusion, and provided so that an underground space is formed by the lower precast plate and a part of the base;
road structure with A road structure according to claim 1,
A road structure, wherein said pile is a box culvert structure functioning as a support for supporting said lower precast slab and said upper precast slab. The road structure according to claim 1 or 2 ,
A road structure, wherein the lower precast slab is placed directly above the surface of the base. A road structure according to any one of claims 1 to 3 ,
A road structure characterized in that an injection hardening agent is filled between the lower precast plate and the base. A road structure according to claim 4,
A road structure, wherein the lower precast slab is provided with through-holes for filling the injection solidifying agent. A road structure according to any one of claims 1 to 5,
A road structure, wherein a height adjusting mechanism is provided between the pile and the upper precast plate. A first step of driving a plurality of piles into the ground;
a second step of excavating the ground to an intermediate portion of the plurality of piles driven into the ground to project a portion of the plurality of piles from the excavated ground;
A third step of fixing a lower precast plate so as to straddle the piles and face the excavated ground at the lower part of the protrusion of the pile protruding from the excavated ground;
A fourth step of fixing the upper precast plate across the piles at the upper part of the protrusion so that a space is provided between the lower precast plate and the lower precast plate;
A method of manufacturing a road structure, comprising: A first step of driving a plurality of piles into the ground;
A second step of fixing an upper precast plate across the piles at the upper part of the piles;
a third step in which the ground below the upper precast plate is excavated to the intermediate portion of the pile, and a part of the upper side of the pile protrudes;
A fourth step of fixing the lower precast plate across the piles at the lower part of the protrusion of the pile so that a space is provided between the upper precast plate and the upper precast plate;
A method of manufacturing a road structure, comprising: A method for manufacturing a road structure according to claim 7 or 8,
A method of manufacturing a road structure, comprising constructing a box culvert structure by using the piles as supports for supporting the lower precast slab and the upper precast slab. A method for manufacturing a road structure according to any one of claims 7 to 9 ,
A method for manufacturing a road structure, wherein the pile and the lower precast slab are joined by fixing the lower precast slab to a flange projecting radially from the pile. A method for manufacturing a road structure according to any one of claims 7 to 10 ,
A method of manufacturing a road structure, characterized in that the lower precast slab is placed directly above the surface of the base. A method for manufacturing a road structure according to any one of claims 7 to 11 ,
A method for manufacturing a road structure, comprising a fifth step of filling an injection hardening agent between the lower precast plate and the base.

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