JP2002206238A - Coupling tool for strut in strut earth-retaining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coupling structure of a strut, which enables the installation of a reinforcing bar in accordance with a design without performing recovery even during the intersection of the strut and the reinforcing bar of a reinforced concrete structure to be constructed in a strut earth-retaining method. SOLUTION: In this structure, strut members are coupled and journaled in the position of the intersection of the vertical and horizontal reinforcing bars arranged in the strut and the reinforced concrete structure, and a coupling tool composed of a rigid body formed with a cavity is interposed between the strut members so as to enable the installation of the reinforcing bars, so that the reinforcing bars of the structure can be easily installed in accordance with the design.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting member for a girder supporting a girder wall in a girder girder method for constructing a reinforced concrete structure.

[0002]

2. Description of the Related Art Generally, a cutting beam for supporting a retaining wall is penetrated and installed in a reinforced concrete structure to be constructed. However, at the position where the vertical and horizontal rebars arranged in the building intersect with the girder, the girder is hindered by the girder and cannot be arranged as designed.

Therefore, conventionally, the reinforcing bar hindered by the girder is cut near the lower part of the girder, and the construction of the building by concrete casting is interrupted near the lower part of the girder. Rearrangement of cutting beams and scaffolding for performing the rearranging of the cutting beams are performed.

[0004]

However, the cutting of the rebar and the interruption of the concrete casting in the prior art have a problem in that the quality of the structure is deteriorated and the construction is prolonged.

[0005] In addition, the replacement of cutting beams and the replacement of scaffolds for replacing the cutting beams have problems in long-term construction, safety, and increase in construction costs.

[0006] Furthermore, seismic reinforcement in which the peripheral surface of an existing structure is rolled up with reinforced concrete is performed so that even when the cover concrete is peeled off near the plastic hinge region of the concrete and the axial reinforcement is exposed, it can function reliably. The rebar installed on the peripheral surface of an existing structure must not be provided with a joint structure for the rebar. Therefore, depending on the installation position of the cutting beam, the rebar cannot be cut.

[0007]

SUMMARY OF THE INVENTION According to the present invention for solving the above-mentioned problems in the prior art, a connecting member for a girder in a girder-to-girder method is firstly used for a reinforced concrete structure to be constructed with the girder. At a position intersecting with the vertical and horizontal reinforcing bars to be arranged, connecting and supporting the cutting beams, and forming a cavity capable of inserting the reinforcing bars, a connecting member made of a rigid body is provided at an intermediate portion of the cutting beams. Alternatively, it is characterized in that the structure is such that the reinforcing bars arranged in the structure can be easily installed by being interposed at the end portion and can be installed as designed.

Second, the connecting member is divided into a plurality of parts in the axial direction of the cutting beam and has a structure capable of being detached.
It is possible to adjust the length of the connecting tool, absorb the error between the connecting tool and the arrangement position of the rebar caused by the movement of the connecting tool and the construction of the structure caused by the uneven earth pressure, Further, even if the connecting tool protrudes, a part of the divided connecting tool can be removed from the inside of the structure.

Third, a removable box-extracting formwork is inserted or inserted between the connecting member and the cutting beam or between the connecting members, so that the finished surface of the building can be suitably formed. In addition, the position of the box-forming form can be moved in the axial direction of the cutting beam, so that the construction position of the building due to the movement of the connecting tool or the construction error of the building caused by the uneven earth pressure can be reliably established. It can be built.

[0010] Fourth, a detachable fastener is inserted into a connecting portion between the connecting tool and the cutting beam, and is fastened.
The connection tool and the cutting beam embedded in the building are easily detached.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a cutting beam retaining method constructed by applying the present invention. In the figure, 1 is a ground pile, 2 is a mountain retaining wall made of steel sheet pile which is cast on the ground 1, 20 is a ground pressure applied to the mountain retaining wall 2 from the ground 1
An upset 5 made of an H-shaped steel material to prevent the collapse of the ground 1
Supports the stomach 20 and between the opposed stomachs 20,
It is a girder directly erected.

As shown in FIG. 1, the cut beam 5 has two cut beam members 5a on both sides made of an H-shaped steel material having an appropriate length and the inside of the reinforced concrete structure 3 corresponding to the interval between the opposed ridges 20. Beam member 5 made of one H-shaped steel material embedded in
b. Then, at a position intersecting with the two reinforcing bars 4 installed in the building 3, the bridge 6 is provided by the connecting member 6 made of a steel material and interposed between the cutting member 5a and the cutting member 5b of the present invention. An example is shown. In addition, the connection tool 6 and the cutting beam member 5b in this embodiment are embedded in the building 3 after the completion of the building 3.

FIG. 2 is a perspective view showing a schematic configuration of the connecting member 6 and the reinforcing bar 4 interposed between the cutting member 5a and the cutting member 5b shown in FIG. Cut beam member 5a and cut beam member 5b
The vertical direction reinforcing bar 4a and the horizontal direction reinforcing bar 4b which are arrange | positioned in the structure 3 are inserted in the connection tool 6 interposed between them.

FIG. 3 shows a connector 6 according to the first embodiment.
It is a perspective view of. The connecting member 6 in the present embodiment includes a cylindrical column member 8 made of eight steel materials for connecting and supporting the cutting beam member 5a and the cutting beam member 5b, and a single sheet for fixing the cylindrical column member 8 thereto. A contact plate 9 made of steel material, a cylindrical column member 8 and a reinforcing rib 10a made of a plurality of steel materials for reinforcing the contact plate 9;
10b and 10c.

The connecting member 6 has a function of connecting and supporting the cutting member 5a and the cutting member 5b, and a plurality of reinforcing ribs 10a and 10b for reinforcing are arranged in a truss shape. A cavity 11 is formed so that the rebar 4a and at least one rebar 4b can be inserted. Thereby, the conventional rebar is cut around the lower part of the girder, the concrete placement of the structure is interrupted, and the girder of the girder and the scaffold for performing the rearrangement of the girder become unnecessary.

The connecting member 6 of the present embodiment connects the cutting beams.
If the function of supporting the shaft and the cavity 11 can be secured, the cylindrical column member 8 and the plurality of reinforcing ribs 10a, 10b, 10c
Or may be constituted only by the cylindrical column member 8.

As shown in FIG. 4, the connecting member 6 of this embodiment is a connecting member 7 of a hollow block made of a lattice-like steel material so that the reinforcing bars 4a and 4b can be installed. Good.

FIG. 5 shows a connector 6 according to a second embodiment of the present invention.
FIG. The connecting tool 60 in the present embodiment includes a cylindrical column member 80 made of eight steel materials for connecting and supporting the cutting beam member 5a and the cutting beam member 5b, and a single steel material fixing the cylindrical column member 80. Plate 9, cylindrical column member 80, and reinforcing ribs 10 made of a plurality of steel materials for reinforcing the contact plate 9
a.

The cylindrical column member 80 is divided into three in the axial direction X of the cutting beam, and the divided cylindrical column member 80a
Is formed with a screw 80e shown in FIG. 7, and an end face of the other cylindrical column member 80b has a hole 8 through which the screw 80e is inserted.
0d is formed and the structure is removable. Therefore, the length of the cylindrical column member 80 can be adjusted, and an error between the movement of the connecting member 60 caused by the uneven earth pressure and the arrangement position of the connecting reinforcing member 60 and the reinforcing bar 4 due to the construction of the building 3 is absorbed. Even if the cylindrical column member 80 protrudes outside the building 3 after completion, the divided cylindrical column member 80a can be removed from the inside of the building.

FIG. 6 is a sectional view showing an embodiment according to claim 3 of the present invention. Between the connecting member 6 and the cutting beam member 5a, a box removing mold frame 13 made of a detachable steel material is sandwiched via bolts 12, and in the construction of the building 3, the vicinity of the cutting beam member 5a and The joint between the cutting beam member 5a and the connecting member 6 facilitates the processing and installation of the formwork of the building 3, and the finished surface of the building 3 is suitably formed.

FIG. 7 is a sectional view showing an embodiment according to claim 3 of the present invention. The box blanking frame 13a having a hole larger than the outer diameter of the cylindrical pillar member 80 is passed through the cylindrical column member 80, and the position of the box blanking frame 13a is set in the axial direction X of the cutting beam 5. Can move, the construction position of the building 3 can be reliably established due to the movement of the connecting tool 60 caused by the uneven earth pressure and the construction error of the building 3.

The fastening structure of the fourth embodiment will be described with reference to FIG. 6. The connecting portion between the connecting member 6 and the cutting beam member 5a is attached to and detached from the inner space 8a of the cylindrical column 8 constituting the connecting member 6. A bolt 12 which is a fastener that can be fitted is fitted, so that after the construction of the building 3, the cutting beam member 5 a can be easily removed from the connecting tool 6.

As described above, in the present embodiment, the case of directly erection between the opposed belly uplifts 20 has been described.
For example, as shown in FIG. 8, when the surface of the existing structure 14 is seismically reinforced by the reinforced concrete roll-up structure 3a, a cutting beam member 5a is erected between the barb 20 at one end and the existing structure 14, and the connection is made. If the abutment plate 9 of the tool 6 is directly fixed to the existing structure 14 by the anchor bolt 15, the cut beam members installed at both ends of the connecting tools 6, 7, 60 shown in the previous embodiment It is not necessary to have a form interposed only between 5a and 5b.

The cutting beam member 5b in this embodiment is
Although buried in the building 3 after completion, as shown in FIG. 9, when a wall-shaped reinforced concrete building 16 is to be constructed, the contact plates 9 of at least two of the connecting tools 6 are bolted by bolts 12a. A cutting beam 5 in which the fastener 12 and the box-forming form 13 are attached to both ends of the connecting tool 6.
The present invention is also applicable to the connecting devices 6, 7, 60 of the first embodiment.

Further, as shown in FIG. 10, when a narrow wall-shaped reinforced concrete structure 17 is to be constructed, the fasteners and the box punches are provided at both ends of the connector 6 from which the abutment plate 9 is omitted. The present invention is also applied to the connecting members 6, 7, 60 of the cutting beam 5 to which the forming form 13 is attached.

Further, the connecting members 6, 7, 6 of the present embodiment
0 is not limited to the arrangement of the rebars 4a and 4b arranged in the building 3, but may be a water pipe or a gas pipe.

Further, although not shown, the connecting members 6, 7, and 60 of the present invention are not only applied to horizontal members as cutting beams in the cutting beam staking method, but also to the intermediate piles in the cutting beam staking method. It can also be applied to vertical members.

[0028]

As described above, according to the present invention, according to the present invention, at the position where the cutting beam and the rebar intersect, the connecting member for connecting and supporting the cutting beam and forming a cavity is interposed. Thereby, the rebar is installed as designed, and the rebar can be easily arranged without performing reversion.

Further, since the connecting member is divided into a plurality of parts in the axial direction of the cutting beam and can be attached and detached, the length of the connecting member can be adjusted, and the movement of the connecting member caused by uneven earth pressure can be achieved. Error of the connection position between the connecting tool and the reinforcing bar due to the construction of the building or the structure can be absorbed, and even if the connecting tool projects outside the completed structure, some of the divided connecting tools can be removed from the inside of the structure .

Further, the detachable box-cutting formwork is interposed between the connecting member and the cutting beam, so that the peripheral surface of the cutting beam and the joint between the cutting beam and the connecting member are formed. In addition, the processing and installation of the formwork of the structure are facilitated, the finished surface of the structure is suitably formed, and even after casting of the post-cast concrete, the joint surface after removing the cut beam is excellent in appearance.

[0031] Further, by providing a detachable form for removing the box through the connecting member, the position of the form for removing the box can be moved in the axial direction of the cutting beam, thereby reducing the earth pressure. The construction position of the structure can be reliably established due to the generated movement of the connecting tool and the construction error of the structure.

Further, at the connecting portion between the connecting tool and the cutting beam,
The insertion of the detachable fastener makes it easy to remove the connecting tool and the cutting beam embedded in the building.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a cutting beam staking method constructed by applying the present invention.

FIG. 2 is a perspective view showing a schematic configuration of a connecting portion of a cutting beam.

FIG. 3 is a perspective view of the connector according to the first embodiment.

FIG. 4 is a perspective view when a connecting member is a lattice-shaped hollow block body.

FIG. 5 is a perspective view of a connector according to a second embodiment.

FIG. 6 is a cross-sectional view of the box cutting formwork according to the first embodiment.

FIG. 7 is a cross-sectional view of the box cutting formwork according to claim 2;

FIG. 8 is a sectional view of a connecting member of a cutting beam to which a connecting reinforcing member is directly fixed to an existing building, and a box-forming form and a fastener are attached.

FIG. 9 is a cross-sectional view of a connecting member of a cutting beam in which two connecting tools are connected and a box-forming form and a fastener are attached to both ends of the connecting tool.

FIG. 10 is a cross-sectional view of a connecting member of a cutting beam in which a box-cutting formwork and a fastening member are attached to both ends of the connecting member without the contact plate.

[Explanation of symbols]

 3 Reinforced concrete structure 4 Reinforcing bar 5 Cutting beam 6, 60 Connecting tool 8 Cylindrical column member 11 Cavity 12 Bolt 13, 13a Forming box

Claims (4)

[Claims] In the construction of a girder in the girder staking method, the girder is connected to a position where the girder intersects a vertical and horizontal reinforcing bar arranged in a reinforced concrete structure to be constructed.
Pivotally supported, and formed a cavity into which the rebar can be inserted,
A connecting member for a cut beam in a cut beam mountain retaining method, wherein a connecting member made of a rigid body is provided at an intermediate portion or an end portion of the cut beam. 2. The method according to claim 1, wherein the connecting member is divided into a plurality of parts in the axial direction of the cutting beam, and the structure is detachable. Utensils. 3. The detachable box-cutting formwork is sandwiched or passed between the connecting member and the cutting beam or between the connecting members. Cut beam connecting tool in the cut beam stake method. 4. The method according to claim 1, wherein a detachable fastening tool is inserted into a connecting portion between the connecting tool and the cutting beam and fastened. Of the cutting beam in