JPH0913364A - Joint structure of steel wall and reinforced concrete floor panel - Google Patents

Abstract

PURPOSE: To rapidly and surely join a steel wall to a reinforced concrete floor panel using a simple means. CONSTITUTION: In a joint structure of a steel wall 7, in which a pair of joints 3 each comprising a steel pipe with a groove provided on the outer periphery of each of a plurality of steel pipe sheet piles 6a are engaged with each other, and a reinforced concrete floor panel 9, a plurality of small steel pipes 4 each having openings at the upper and lower ends respectively are provided on the side wall of the pile 6a. An end of a concrete floor panel reinforcing bar 8 is inserted into each of the pipes 4 from the opening thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel wall and a reinforced concrete floor when a steel wall used in the field of civil engineering such as an open-cut tunnel, a sewage treatment plant, or a construction field is also used as a temporary earth retaining wall and a main body wall. Regarding the joint structure with the plate.

[0002]

2. Description of the Related Art Regarding the conventional joining of a steel wall and a concrete floor slab, for example, on November 1, 1984, Construction Bridge Co., Ltd., "Bridge and Foundation" Vol. 18, No. 11, No. 19-2
Those described on page 3 are known. The outline is shown in Figure 1.
As shown in FIG. 7, the gusset plate 21 is fixed by welding 28 to the side surface of the steel embedding member made of the steel pipe sheet pile 6a that constitutes the steel wall 7, and a plurality of short rebars 27 are fixed by welding 29 to the gusset plate 21. However, the short rebar 27 is embedded in the concrete floor slab 9.

[0003]

In the case of the above-mentioned conventional joint structure of the steel wall 7 and the concrete floor slab 9, the steel pipe sheet pile 6a and the gusset plate 21 are welded and the gusset plate 21 is welded in the field construction. Since there is welding work with the short rebar 27, the attachment thereof is complicated and the working time is long. In addition, especially when the working condition is underground, it is difficult to secure quality because of high humidity. Moreover,
Welding of the gusset plate 21 and the short rebar 27 is performed by fillet welding. However, when high quality fillet welding is not performed, tensile force due to a bending moment that complicates the welded joint is applied. There is a possibility that the necessary proof stress cannot be satisfied with respect to forces such as shearing force.

Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a joint structure capable of simply and quickly and reliably joining the steel wall 7 and the reinforced concrete floor slab 9.

[0005]

In order to solve the above-mentioned object, a joint structure of a steel wall and a reinforced concrete floor slab of the present invention has a plurality of steel sheet piles 6 with joints 3 in the joint 3 portion. A plurality of rebar insertion hole forming frames 26 for forming the rebar insertion holes 25 opened in the vertical direction are provided side by side on the side surface of the steel sheet pile 6 by engaging with each other to form a steel wall 7. The end portion of No. 8 is fixed by penetrating the reinforcing bar insertion hole 25.

The rebar insertion hole forming frame 26 may be composed of a small steel pipe 4 having upper and lower openings, and the small steel pipe 4 may be fixed to the side surface of the steel sheet pile 6.

The reinforcing bar insertion hole forming frame 26 may be made of grooved steel 5 having an appropriate cross-sectional shape with both ends fixed to the side surfaces of the steel sheet pile 6.

A steel plate 17 for fixing through which the concrete slab rebar 8 is inserted at the upper and lower ends of the frame 26 for forming the rebar insertion hole,
It is preferable that the concrete floor slab 8 is fixed to the fixing steel plates 17 and 24 by screwing means or welding on the outside of the fixing steel plates 17 and 24.

In the rebar insertion hole forming frame 26,
The grout material 11 may be filled so that the concrete floor slab 8 is buried.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 10 show an embodiment of the present invention. As an example of the steel sheet pile 6, a steel wall 7 formed by connecting steel pipe sheet piles 6a and a reinforced concrete wall 14 integrally fixed to the steel wall 7 are formed. An example of a structure is shown in which the composite wall 15 and the reinforced concrete floor slab 9 that are configured are joined by placing the floor slab concrete 12.

The steel pipe sheet pile 6a is constructed by arranging a plurality of sets of joints 3 of steel pipes with grooves 2 necessary to form a wall by welding on both sides of a sheet pile body made of the steel pipe 1, and fitting these joints. The steel wall 7 is constituted by. Further, on the side surface on the outer side of the wall of the steel pipe sheet pile 6a, a plurality of sets of small steel pipes 4 for connecting reinforcing bars as an example of the reinforcing bar insertion hole forming frame 26 are connected to the same level to connect the concrete floor slab reinforcing bars 8 such as deformed reinforcing bars. It is arranged and fixed by welding.

The upper and lower ends of these connecting small steel pipes 4 are opened, and the ends of the concrete floor slab rebar 8 are fixed by penetrating through the respective openings. To FIG. That is, the upper fixing steel plate 17 is abutted on the upper end of the opening of the small steel pipe 4, and the lower fixing steel plate 24 is abutted on the lower end thereof to form the upper and lower fixing steel plates 17, 24. A downward vertical portion 33 at one end of the concrete floor slab 8 penetrates through the slit or hole 32. A male screw 22 is formed at the end of the reinforcing bar, and the fixing steel plates 17, 2 are formed.
On the outside of 4, the concrete floor slab rebar 8 is fastened and fixed to the small steel pipe 4 by the upper nut 10 and the lower nut 23 screwed onto the male screw 22. Then, the fixing of the concrete floor slab 8 is strengthened by the grout material 11 such as mortar injected into the small steel pipe 4. Further, the concrete floor slab 9 is reinforced by the floor slab distribution reinforcement 13.
Even if the male screw 22 is not provided on the entire length of the end portion of the concrete floor slab rebar 8, at least the nuts 1 in the upper and lower portions are provided.
It is preferable that 0 and 23 are screwed together and provided over the range necessary for tightening the fixing steel plates 17 and 24. Further, the other end side of the concrete floor slab rebar 8 is also attached to the rebar insertion hole forming frame 26 made of the small steel pipe 4 in the same manner.

In this embodiment, as shown in FIG.
This is a case where a tensile moment acts on the upper surface side of the reinforced concrete floor slab 9. When a bending moment acts, the tensile force of the reinforced concrete floor slab 8 is transmitted as an in-plane force in the axial direction of the steel wall 7. .

Next, the process for constructing the junction structure in the first embodiment will be described. First, a steel pipe sheet pile 6 in which a pair of joints 3 made of grooved steel pipes are arranged facing each other on both sides of the steel pipe 1.
A plurality of small steel pipes 4 for connecting reinforcing bars are previously provided in a, and the steel walls 7 are formed at intervals by driving them into the ground 16 with the joints 3 fitted to each other. After that, the ground inside the steel walls 7 is excavated (see FIG. 4).

Then, as shown in FIG. 7, the end of the concrete floor slab rebar 8 is penetrated into the connecting small steel pipe 4, and the tip of the rebar 8 is fixed to the upper fixing steel plate 17 and the lower part. The lower nut 23 is screwed into the male screw 22 at the tip of the reinforcing bar on the outer side of the lower fixing steel plate 24 as shown in FIG. After slightly lifting the upper fixing steel plate 17 from the upper end of 4, the mortar as the grout material 11 is poured into the upper steel plate 17 through the upper opening of the small steel pipe 4 as illustrated in FIG. Then, as illustrated in FIG. 10, the upper nut 10
Then, the upper fixing steel plate 17 is fastened to the upper end of the small steel pipe 4. In this case, the concrete floor slab rebar 8 is held at the bar arranging position by the floor slab force-reinforcing bar 13 connected to the concrete slab rebar 8 by a grid or the like, or other appropriate means.

Next, the steel wall 7 and the reinforced concrete wall 14
And the composite wall 15 is formed. In this case, as shown in FIG. 4, the steel sheet pile 6 is provided with short slip preventing members 18 in an amount sufficient for integration with the reinforced concrete, and is arranged for the slip preventing members 18 and the reinforced concrete wall 14. The wall concrete 20 is placed so as to embed the wall reinforcing steel bar 19 and the composite wall 15 are constructed.

Further, the floor slab concrete 12 is placed by embedding the concrete floor slab rebar 8, the floor slab distribution bar 13, the rebar connecting small steel pipe 4 and the short length displacement preventing member 18, and the steel wall 7 is formed. Concrete slab 9 and synthetic wall 15
Is a structure in which

12 to 16 show a second embodiment of the present invention. In the second embodiment, the reinforcing bar insertion hole forming frame 26 uses a channel steel 5 for connecting reinforcing bars, which has a substantially U-shaped cross section, instead of the small steel pipe 4 of the first embodiment, and both ends thereof are welded 30. It is fixed to the side surface of the steel sheet pile 6.
Then, the end portion of the concrete floor slab rebar 8 is inserted into the channel steel 5 for connecting the reinforcing bars, the grout material 11 is filled in the channel steel 5, and the upper and lower portions are fixed to the upper and lower edges of the channel steel 5. Steel plate 1
The concrete floor slabs 8 can be fixed to the channel steel 5 by abutting 7, 24 and penetrating the concrete floor slabs 8 into the holes 32 and fixing the two with welding 31. The other structure is the same as that of the first embodiment.

In the case of the second embodiment, since the concrete floor slab 8 and the upper and lower fixing steel plates 17 and 24 are fixed by welding 31, the male screw 22 and the upper and lower nuts 10 and 23 in the first embodiment are fixed. Is unnecessary.

In the first and second embodiments, the steel pipe sheet pile 6a is shown as an example of the steel sheet pile 6, but the present invention is not limited to this, and steel sheet piles having various cross-sectional shapes with joints can be used. It can be applied when used to form the steel wall 7. Further, the rebar insertion hole forming frame 26 is not limited to the cross sectional shape of the tubular small steel pipe 4 or the semi-cylindrical U-shaped channel steel 5 of the first and second embodiments shown as specific examples. Further, as for the means for fixing the concrete floor slab 8 to the small steel pipe 4 and the channel steel 5 having a U-shaped cross section, the male screw 22 and the upper and lower nuts 10 and 23 and the welding 3 in the first and second embodiments are also used.
A fixing means other than 1 may be used.

When carrying out the present invention, the upper fixing steel plate 1
7 or the rebar insertion hole forming frame 26 may be provided with a grout material injection hole and an exhaust port if necessary. In the case of the first embodiment, the concrete slab rebar 8 can be fixed to the steel sheet pile 6 without performing the welding work in the field, so that the quality deterioration due to the field work such as welding does not occur.

[0022]

As described above, the joining structure of the steel wall and the reinforced concrete floor slab of the present invention has a small steel pipe for joining in which the steel sheet pile 6 forming the steel wall 7 is penetrated by the concrete floor slab rebar 8. 4 or the rebar insertion hole forming frame 26 of the channel steel 5 or the like is provided, the concrete floor slab rebar 8 can be fixed by penetrating from the opening of the small steel pipe 4 or the channel steel 5 at the time of site construction. The construction is simple and quick, and the structure is simple.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a joint structure between a steel wall and a reinforced concrete floor slab according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional plan view of FIG.

FIG. 3 is a cross-sectional view showing a joint structure of a steel wall, a concrete floor slab, and a composite wall according to the first embodiment.

FIG. 4 is an enlarged view of a part of FIG. 2;

FIG. 5 is a vertical cross-sectional side view showing a method of attaching the concrete floor slab rebar to the small steel pipe for connecting rebars according to the first embodiment.

FIG. 6 is an enlarged sectional view taken along line XX of FIG. 5;

FIG. 7 is a vertical sectional side view showing a first step of attaching the small steel pipes for connecting the reinforcing bars and the concrete floor slabs.

FIG. 8 is a vertical cross-sectional side view showing a second step of attaching small steel pipes for connecting reinforcing bars and concrete floor slabs.

FIG. 9 is a vertical cross-sectional side view showing a third step of attaching small steel pipes for connecting reinforcing bars and concrete floor slabs.

FIG. 10 is a vertical cross-sectional side view showing a fourth step of attaching small steel pipes for connecting reinforcing bars and concrete floor slabs.

FIG. 11 is an explanatory diagram showing the action of force in the joint structure of FIG. 1.

FIG. 12 is a partially longitudinal side view showing a state in which a steel wall is formed by fitting and driving a steel pipe sheet pile having a large number of small steel pipes for connecting reinforcing bars according to a second embodiment of the present invention.

FIG. 13 is an enlarged plan view of a part of FIG.

FIG. 14 is a vertical cross-sectional side view showing a method of attaching the concrete floor slab rebar according to the second embodiment to the steel pipe sheet pile.

15 is an enlarged cross-sectional view taken along the line YY of FIG.

FIG. 16 is a cross-sectional view showing a joint structure of a steel wall, a concrete floor slab, and a composite wall according to the second embodiment.

FIG. 17 is a vertical sectional side view showing a conventional joint structure between a steel wall and a concrete floor slab.

[Explanation of symbols]

 1 Steel Pipe 2 Groove (slit) of Joint 3 Joint 4 Small Steel Pipe for Reinforcing Bar Connection 5 Channel Steel for Reinforcing Bar Connection 6 Steel Sheet Pile 6a Steel Pipe Sheet Pile 7 Steel Wall 8 Concrete Deck Reinforcing Bar 9 Concrete Deck 10 Top Nut 11 Grout Materials 12 Floor slab concrete 13 Floor slab distribution reinforcement 14 Reinforced concrete wall 15 Synthetic wall 16 Ground 17 Steel plate for upper fixing 18 Short length slip prevention member 19 Wall reinforcing steel bar 20 Wall concrete 21 Gusset plate 22 Male screw 23 Lower nut 24 Steel plate for lower fixing 25 Reinforcing Bar Insertion Hole 26 Reinforcing Bar Insertion Hole Forming Frame 27 Short Reinforcing Bar 28 Welding 29 Welding 30 Welding 31 Welding 33 Vertical Part

Claims (5)

[Claims] 1. A steel wall 7 is formed by engaging a plurality of steel sheet piles 6 with joints 3 at the joints 3, and a reinforcing bar insertion hole is formed on a side surface of the steel sheet pile 6 in a vertical direction. A plurality of rebar insertion hole forming frames 26 for forming 25 are arranged side by side,
A joint structure of a steel wall and a reinforced concrete floor slab, characterized in that an end of a concrete floor slab 8 is fixed by penetrating the reinforcing bar insertion hole 25. 2. The rebar insertion hole forming frame 26 is composed of a small steel pipe 4 having upper and lower openings, and the small steel pipe 4 is fixed to a side surface of a steel sheet pile 6. Joint structure of steel wall and reinforced concrete floor slab. 3. The joint between a steel wall and a reinforced concrete floor slab according to claim 1, characterized in that the reinforcing bar insertion hole forming frame (26) is composed of a channel steel (5) having both ends fixed to a side surface of a steel sheet pile (6). Construction. 4. A steel plate 1 for fixing through which concrete floor slabs 8 are inserted at the upper and lower ends of the frame 26 for forming the reinforcing rod insertion holes.
7. The concrete floor slabs 8 are fixed to the fixing steel plates 17 and 24 by screwing means or welding outside the fixing steel plates 17 and 24. A joint structure of a steel wall and a reinforced concrete floor slab according to any one of 1 to 3 above. 5. The steel wall according to any one of claims 1 to 4, wherein a grout material 11 is filled in the frame 26 for forming the reinforcing bar insertion hole so that the concrete floor slab 8 is embedded. Joint structure of reinforced concrete floor slab.