JP2718362B2 - Construction method of concrete structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a concrete structure, and more particularly to a method for constructing a concrete structure suitable for application to box culvert construction.

[0002]

2. Description of the Related Art As shown in FIG. 13, a box culvert 1 is composed of two small box-shaped culverts 1a, 1
b are brought into contact with each other so as to form a rectangular tube, and both are connected. In addition, a plate-shaped small split body may be interposed between the U-shaped small split bodies 1a and 1b. The box culvert 1 assembled in a rectangular tube shape is, for example, as shown in FIG.
A culvert is constructed by connecting a large number of box culverts 1 arranged in a groove on the ground and adjoining one another.

Conventionally, a small box culvert split body 1a, 1
In order to connect the b box members with each other, as shown in FIG. 13, the PC steel rod 2 protruding from the end face of one box culvert small body 1a is passed through the sheath 3 penetrated through the other box culvert small body 1b. The PC steel rod 2 is tensioned, and a nut 4 is screwed into the tip of the PC steel rod 2. Note that an adhesive such as epoxy is applied between the end faces of the small box culvert split bodies 1a and 1b.

[0004]

In the method of assembling the box culvert by connecting the small box culvert split bodies 1a and 1b in the conventional manner, the PC steel rod 2 and the PC steel rod 2 are not connected until the adhesive is hardened. When stress in the orthogonal direction is applied, the small box culvert split bodies 1a and 1b are shifted from each other. For this reason, until the adhesive is fully cured,
The box culverts 1 composed of the assembly of the small split bodies 1a and 1b could not be attracted and connected together.

[0005]

According to the present invention, there is provided a method for constructing a concrete structure, comprising connecting small concrete members to form a unit, and connecting a plurality of the units to form a concrete structure. The small members are connected to each other by a CH joint via an adhesive therebetween to form the unit, and before the adhesive is cured, the units are connected to each other by a PC steel material. It is characterized by being connected by a PC steel material.

[0006]

According to the method for constructing a concrete structure of the present invention, since the small members are connected by the CH joint, the connection between the small members becomes extremely high strength and rigid immediately after the small members are connected. It will be. Therefore, the units can be connected with the PC steel immediately after the units are configured.

[0007]

Embodiments will be described below with reference to the drawings. 1 to 11 show a method of assembling a box culvert according to an embodiment of the present invention. FIG. 1 is an overall perspective view showing a method of assembling a box culvert, and FIG. FIG. 3 is a perspective view of a CH joint, FIG. 4 is an enlarged perspective view of a main part near a working port in FIG. 1, FIG. 5 is a perspective view showing a state where box culverts are connected to each other, and FIG. 5 is a sectional view taken along the line VI-VI of FIG. 5, FIG. 7 is a sectional view taken along the line VII-VII of FIG. 5, FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. 9 is an overall view showing a state in which a plurality of box culverts are connected to each other, FIG. 10 is a longitudinal sectional view near a work port in a state in which the box culverts are connected to each other, and FIG. It is a longitudinal cross-sectional view which shows the state which is tense.

In the present embodiment, the small box culvert corresponds to a small concrete member, and the small box culvert corresponds to a unit.

In this embodiment, the C-shaped joint 6 of the CH joint 10 is embedded in the end faces of the small box culvert split bodies 5 and 5. The C-shaped joint 6 has a C-shaped cross section, and an anchor bar 7 is screwed thereto.

After applying an adhesive such as epoxy to the end face of the box culvert small split body 5, the box culvert small split bodies 5 are brought into contact with each other with their end faces abutting each other. By inserting 8 into the central hole 6a of the C-shaped joint 6, the box culvert small split bodies 5 are connected to each other.

The box culvert small split body 5 includes:
A vertical sheath 11 and a horizontal sheath 12 are embedded. At the corner of the inner surface of the small box culvert 5, a working opening 13 is formed so as to face a middle part of the sheath 12 in the horizontal direction.

In the method of assembling the box culvert 9, the connection between the small box culverts 5 is extremely high in strength and rigid even immediately after the small box culverts 5 are connected by the CH joint 10. Therefore, the box culverts 9 can be immediately attracted to each other to perform the connecting operation.

In order to perform this connection operation, the box culverts 9A and 9B are butted together, and the PC steel rod 14 is passed through the sheath 12 as shown in FIG. Male screws are engraved on both ends of the PC steel rod 14. Box culvert 9A
As shown in FIG. 6, a nut 1 is inserted through a grout washer 15 into the tip of the PC steel rod 14 protruding into the work opening 13 of FIG.
Screw 6 in.

Since the rear end of the PC steel rod 14 protrudes into the working opening 13a of the box culvert 9B, a nut 16a is screwed through a grout washer 15a as shown in FIG.

Next, a pull rod 17 is passed through the sheath 12 from the rear end of the box culvert 9B.
7 is connected to the rear end of the PC steel rod 14 by a coupler (long nut-like member) 18.

At the rear end face of the box culvert 9B, an eighth
As shown in the figure, a center hole jack 19 is attached, and an anchor nut 21 is tightened to the rear end of the pull rod 17 via a washer 20. Next, hydraulic pressure is supplied to the jack 19, the plunger 19a is projected rearward (to the right in FIG. 8), and the PC steel bar 14 is tensioned via the pull rod 17. Therefore, the nut 16a at the rear end of the PC steel rod 14 is screwed firmly to maintain the tension of the PC steel rod 14.

Thereafter, the coupler 18 is removed, and the pull rod 17 is pulled out of the box culvert 9B. In addition,
The box culverts 9A and 9B are connected to each other through the PC steel rod 14 in the same manner for all the sheaths 12 of the box culverts 9A and 9B. As a result, the box culverts 9A and 9B are tied together.

Next, as shown in FIG. 9, a box culvert 9C is arranged adjacent to the box culvert 9B, and a new PC steel rod 14 (14A) is passed from the box culvert 9C to the box culvert 9B. Then, as shown in FIG. 10, a nut 16 is screwed into the end of the PC steel rod 14A via a grout washer 15, and then the PC steel rod 14A is screwed.
A and the rear end of the PC steel rod 14
Connect with. A nut is screwed into the rear end of the PC steel rod 14A via a washer as in FIG.

A pull rod is inserted from the rear end of the box culvert 9C, and the front end of the pull rod is connected to the rear end of the PC steel rod 14A in the working opening of the box culvert 9C.
The steel rod 14A is tensioned, and then the nut at the rear end of the PC steel rod 14A is tightened. As a result, the box culvert 9C is tied to the box culvert 9B.

Hereinafter, by repeating this procedure, box culverts 9D, 9E, 9F...
Are tied sequentially.

After a predetermined number of box culverts 9 have been tied, the upper and lower split bodies 5 are tied together in each box culvert 9. That is, as shown in FIG.
The C steel rod 24 is inserted, and the nut 16 is tightened to the lower end and the upper end of the PC steel rod 24 via the grout washers 15 respectively.

Then, the PC steel rod 2 is passed through the jack 19.
After tightening the nut 4, the nut 16 on the upper end side is tightened. Thereafter, the pressure of the jack 19 is released, and the jack 19 is removed. After the tension work of the PC steel bar 24 is completed, grouting is immediately performed.

In the above embodiment, the box culvert 9 is assembled only by the small box-shaped culverts 5 of the U-shape. The present invention can be applied to the case of constructing a culvert.

FIG. 12 shows an example thereof, and reference numeral 25 denotes a plate-like side wall material. A sheath 26 is also buried in the side wall material 25 in the vertical direction, and a PC steel rod 27 is inserted.

Although the above embodiment relates to a box culvert, the present invention can be applied to other concrete structure construction methods.

[0026]

As described above, according to the method of constructing a concrete structure of the present invention, small concrete members can be connected very easily, with high strength and rigidly. In addition, immediately after the connection of the small concrete members, the connection between them is high in strength and rigid. Therefore, after connecting the small members to form a unit, the units are immediately pulled together with a PC steel rod or the like. Can be connected.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a method of assembling a box culvert.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a perspective view of a CH joint.

FIG. 4 is an enlarged perspective view of a main part near a work port in FIG. 1;

FIG. 5 is a perspective view showing a state in which box culverts are connected to each other.

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 5;

FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 5;

FIG. 9 is an overall view showing a state where a plurality of box culverts are connected to each other.

FIG. 10 is a vertical cross-sectional view of the vicinity of a work port in a state where box culverts are connected to each other.

FIG. 11 is a longitudinal sectional view showing a state where upper and lower box culvert small split bodies are strained.

FIG. 12 is a plan view of a box culvert according to another embodiment.

FIG. 13 is an exploded perspective view of a conventional box culvert.

FIG. 14 is a perspective view showing a state in which a box culvert of a conventional example is arranged in a ground yard.

[Explanation of symbols]

 5 Box culvert small split body 6 C type joint 7 Anchor bar 8 H type joint 9 Box culvert 10 CH joint 11, 12 sheath 13 Work port 14 PC steel rod 15 Grout washer 16 Nut 17 Pull rod

Claims (1)

(57) [Claims] 1. A method for constructing a concrete structure by connecting concrete small members to each other to form a unit, and connecting the plurality of units to each other, wherein the small members are connected to each other with an adhesive therebetween. Building a concrete structure, wherein the unit is connected by a CH joint to form the unit, and before the adhesive is cured, the units are connected by a PC steel material, and then the small members are connected by a PC steel material. Method.