JP2955423B2 - Cutting beam device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a stretched or squeezed freely plurality of first
The cutting beams are arranged in parallel at an interval, and a plurality of extendable and contractible second cutting beams are arranged at an interval in a posture orthogonal to the first cutting beam, and the first cutting beam group and The present invention relates to a girder device connecting a second girder group .

[0002]

2. Description of the Related Art Conventionally, Japanese Utility Model Publication No. 36-6723 has been disclosed.
As can be seen in the figure, multiple cut beams are
And stretch it, press against the stomach and stretch the retaining wall
Telescopic mechanism for supporting and fixing
Had only one.

[0003]

However, the above conventional technique
In case of surgery, only one telescoping machine for each girder
Since only a frame is provided, for example, in the Y-axis direction
Extend the telescoping mechanism provided on multiple beams that expand and contract
After pushing up the stake to support the retaining wall ,
Extend the telescopic mechanism provided on multiple beams that expand and contract in the axial direction.
Let's push the stomach up and stretch the retaining wall and support it
If there is only one telescopic mechanism,
Even if the telescopic mechanism is brought to the
Cut beams arranged along the Y-axis direction and arranged along the X-axis direction
To move the intersection point of the cut beam in the X-axis direction
Therefore, the cut beam extending in the Y-axis direction is bent in the X-axis direction.
Danger of being unable to resist earth pressure
was there. Therefore, in order to eliminate the bending stress of this girder
To shorten the expansion and contraction mechanism of the cutting beam
While releasing the tension support and eliminating the bending stress,
It is necessary to perform work such as newly extending and re-stretching
In short, workability was poor. Therefore, the present invention
The object of the present invention is to solve the above-mentioned problems and to make a plurality of cut beams X-axis and Y-axis.
Stretch in the axial direction, press the belly and press down
When trying to support a wall by bending, bending stress is applied to the beam.
Girder with good workability that can resist earth pressure without causing cracks
Equipment.

[0004]

Means for Solving the Problems The features of the invention of claim 1
The result is that a plurality of telescopic first cut beams are placed in parallel at intervals.
Arranging a plurality of telescopic second cut beams to the first cut beam;
Are arranged at an interval perpendicular to each other, and the first
In a girder device that connects the first girder group and the second girder group
And the other end of the first cutting beam is
The first pair of prongs are connected to each other, and the second pair of
A shape that connects one end of the cutting beam and the other end
A second pair of prongs is provided, and the first cutting beam and the second
A pair of each provided in a state connected to each of the two cut beams
The telescopic mechanism that presses the bulge against the retaining wall
Are provided separately at both ends.

[0005]

According to the first aspect of the present invention, a first pair of protruding portions are connected to each other so that one end and the other end of the first cut beam are connected to each other, and one end portion of the second cut beam. A second pair of prongs are provided in a state where the other and the other ends are connected to each other, and are connected to the first cut beam and the second cut beam, respectively.
The pair of prongs provided in the state are
Pressing expansion and contraction mechanisms are provided separately at both ends of each beam.
To extend the telescopic mechanism of the girder and press the belly
When trying to stretch and support the retaining wall,
No bending stress occurs. That is, for example, in the Y-axis direction
The extension and contraction mechanism of the plurality of second cutting beams that extend and contract in the
After pushing up the stake to support the retaining wall,
Extend a plurality of first cutting beams that expand and contract in the axial direction
If you try to push and support the retaining wall,
The distance between the first pair of bulges and the retaining wall is
Even if they are different, separate each beam at both ends
A telescoping mechanism extends each one to resolve the difference in distance.
Pressing the stomach while erasing it, strutting the retaining wall and supporting it
Cutting beams arranged along the Y-axis direction
And move the intersection of the cut beams arranged along the X-axis direction in the X-axis direction.
The moving stress is no longer applied, causing bending stress on the beam.
Never.

[0006]

As a result, as a result, the distance of the retaining wall against bulging is reduced.
Bending stress occurs in the girder beam even if the separation is different
Without damaging the earth pressure.
And workability can be improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In accordance with the following steps (1) to (11), the present invention is used, for example, when a portion of a concrete underground wall 1 of a deep underground structure such as an underground parking lot is formed on the second or lower basement floor. This is the cutting beam device A. First, each step will be described. (1) As shown in FIG. 4, the retaining wall 2 is created around the planned location of the underground structure. The retaining wall 2 is a soil pile column wall or an underground continuous wall. In the figure, a soil pile column wall in which a core material 2B is inserted into a soil pile 2A is shown. (2) As shown in FIG. 4, the underground floor is excavated, and the upper part of the retaining wall 2 is supported by the bulge 3 and the cutting beam 4. (3) As shown in FIG. 5, after excavating the ground surrounded by the retaining wall 2 to a set depth, the upper part 1A of the underground wall 1 and the foundation 5 of the first basement are formed in a series of states. . The creation includes the construction of the formwork M, the reinforcement arrangement work, and the concrete placing work. (4) As shown in FIG. 6, the strength of the upper portion 1A is such that the upper portion 1A cannot withstand earth pressure by itself, but can be supported by a cut beam (hereinafter referred to as bearing strength).
After reaching the height of the upper portion 1A and the upper portion 1A of the retaining wall 2 while supporting the upper portion 1A and near the upper portion 1A, to a unit depth sufficient to create a unit portion U connected to the lower end of the upper portion 1A Excavate. The retaining wall 2 is supported using a first beam device A1, and the upper portion 1A is supported using a second beam device A2. First cutting beam device A1 and second
The details of the cutting beam device A2 will be described later. (5) As shown in FIG. 7, the first cutting device A1 is lowered to support the retaining wall 2 near the bottom of the excavation. (6) As shown in FIGS. 7 and 8, a unit portion U connected to the lower end of the upper portion 1A is created, and the unit portion U is connected to the lower end of the created unit portion U to a depth sufficient to create the unit portion U. Excavate the ground. The creation of the unit portion U also includes the construction of the formwork M, the reinforcing arrangement work, and the concrete placing work. (7) As shown in FIG. 9, the excavation is completed, and
If the strength of the unit part U under construction reaches the bearing strength,
After lowering the second cutting device A2 to support the lower end of the unit portion U being formed, lower the first cutting device A1 and support the excavation bottom 2 near the excavation bottom. That is, the support position of the retaining wall 2 by the first cutting beam device A1 is shifted to the excavated bottom. (8) As shown in FIG. 10, a unit part U is formed to be continuous with the lower end of the previously created unit part U, and the ground is excavated as shown in FIG. (9) As shown in FIG. 12, when the excavation is completed and the strength of the unit portion U being formed reaches the bearing strength, the second cutting beam device A2 is lowered to be formed. After supporting the lower end of the unit portion U, the first cutting device A1 is removed, and then the concrete 8 is poured into the excavated bottom, and the concrete supporting the retaining wall 2 is placed thereon. A pressure plate 9 made of a metal. The preparation of the pressure plate 9 includes a reinforcing work and a concrete placing work. (10) As shown in FIG. 13, a lower portion 1B connected to the lower end of the unit portion U is created. (11) As shown in FIG. 14, when the created unit portion U develops strength, the second cutting device A2 is removed. In the underground wall 2, the basement first floor portion 1C above the upper portion 1A is performed at an appropriate time after the upper portion 1A has developed strength. As shown in FIGS. 1 and 2, the first cutting beam device A1 of the cutting beam devices A has a plurality of first cutting beams 6A that can be expanded and contracted and fixed freely, and are arranged in parallel at intervals.
On the group of the cut beams 6A, a plurality of second cut beams 6B, which are also expandable and contractible and can be fixed similarly, are placed and fixed at an interval perpendicular to the first cut beam 6A, and the first cut beam 6A is fixed. Cut beam 6A
A pair of first bulges 6C are provided in a state where one end and the other end are connected to each other, and a pair is formed in a state where the one end and the other end of the second cut beam 6B are connected. The second belly 6D is provided. In other words, the cutting beams 6A and 6B are extended and fixed to protrude, and the supporting state in which the cutting beams 6C and 6D are pressed against the underground wall 2 is shortened. It is configured to be freely switchable to a support release state separated from the wall 2. The first beam 6A and the second beam 6B are both a beam 6a made of H-shaped steel and a jack 6b mounted at both ends in the longitudinal direction so as to expand and contract in the longitudinal direction.
And expands and contracts by expansion and contraction of the jack 6b.
As shown in FIGS. 1 and 3, the second cutting beam device A2 of the cutting beam device A also has a first cutting beam 6A and a second cutting beam 6B, like the first cutting beam device A1. , A first belly 6C and a second belly 6D. That is, the cutting beams 6A and 6B are extended and fixed, and the bulging parts 6C and 6D are connected to the upper part 1A or the unit part
, And can be freely switched between a support state in which the cutting beams 6A and 6B are shortened and lowered so that the cutting beams 6A and 6B can be lowered and the support beams 6C and 6D are separated therefrom. Said
Both the first and second cutting beam devices A1 and A2 are bulging 6C,
6D is pressed against the basement wall 2 or the unit part U,
If you try to hold it, you will get upset and underground for 6C and 6D
The distance from the wall 2 or the unit part U was different at each part
However, separate beams are provided at both ends of each of the beams 6A and 6B.
Jacks 6b are extended separately to solve the difference in distance.
It is configured to be able to support the strut while erasing
Have been. The first cutting device A1 and the second cutting device A
2, only the length of the cutting beams 6A, 6B is different. And both cutting beam devices A1 and A2 are prone to bulging by shortening the cutting beam.
Separate from the basement wall 2 or the unit part U,
Lowering the beam W without disassembling the beam
You can descend to the next support point with your body condition. Although not shown, the lifting and lowering of the suspension wire W is performed using a lifting and lowering device such as a center hole jack generally used for tensioning the winch or the wire. In the above embodiment, the undercut wall 1 was used to create the underground wall 1. However, as shown in FIGS. 15 to 18, the girder device A of the present invention repeats excavation and creation by diverting the formwork M0 in order. Accordingly, the basement floor B of a plurality of floors can be used for supporting the retaining wall 2 in each work process in the case where the basement floors B are sequentially created from the upper one. The present invention may be implemented as follows. As shown in FIG. 19, the bulges 6C and 6D are placed on the spar members 6a of the slats 6A and 6B so as to be slidable only in the longitudinal direction of the slabs to support the bulges 6C and 6D. The placing material 8B is fixed. As shown in FIGS. 20 and 21,
A hanging member that slidably engages only in the longitudinal direction of the cut beam with a receiving member 7 fixed to the cut beam 6A of the cut beams 6A and 6B and that is fixed to the cut beams 6C and 6D, and suspends and supports the cut beams 6C and 6D. 8A is fixed. In the above embodiment, the second cutting beam 6B is directly mounted on the first cutting beam 6A, that is, the cutting beams 6A and 6B are brought into contact with each other, but the cutting beams 6A and 6B are arranged close to each other. Both may be connected by a connecting member. As shown in FIG. 22, when the underground wall 1 of a structure having a large area is used as the cutting beam device A, the number of the cutting beams 6A and 6B is increased to make the cutting beam device A large. In the drawing, two first cutting beams 6A are provided in the same manner as in the above embodiment, but it is needless to say that two or more first cutting beams may be provided. In the above embodiment, the first cutting beam 6A and the second cutting beam 6B are brought into contact in the vertical direction. However, as shown in FIG. 23, the first cutting beam 6A and the second cutting beam 6B Can be located in the same horizontal plane. In the figure, as a joining structure of the both cut beams 6A and 6B, a structure in which the both cut beams 6A and 6B are joined using a joining unit TU having a joint J for joining the respective cut beams 6A and 6B is shown. However, the joining structure can be appropriately changed.

[0008] In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part.

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

FIG. 3 is a cross-sectional plan view of a main part.

FIG. 4 is a longitudinal sectional view showing a construction procedure.

FIG. 5 is a longitudinal sectional view showing a construction procedure.

FIG. 6 is a longitudinal sectional view showing a construction procedure.

FIG. 7 is a longitudinal sectional view showing a construction procedure.

FIG. 8 is a longitudinal sectional view showing a construction procedure.

FIG. 9 is a longitudinal sectional view showing a construction procedure.

FIG. 10 is a longitudinal sectional view showing a construction procedure.

FIG. 11 is a longitudinal sectional view showing a construction procedure.

FIG. 12 is a longitudinal sectional view showing a construction procedure.

FIG. 13 is a longitudinal sectional view showing a construction procedure.

FIG. 14 is a longitudinal sectional view showing a construction procedure.

FIG. 15 is a longitudinal sectional view showing a construction procedure of another embodiment.

FIG. 16 is a longitudinal sectional view showing a construction procedure of another embodiment.

FIG. 17 is a longitudinal sectional view showing a construction procedure of another embodiment.

FIG. 18 is a longitudinal sectional view showing a construction procedure of another embodiment.

FIG. 19 is a longitudinal sectional view of a main part showing another embodiment.

FIG. 20 is a longitudinal sectional view of a main part showing another embodiment.

FIG. 21 is a cross-sectional view of a main part showing another embodiment.

FIG. 22 is a cross-sectional view of a main part showing another embodiment.

FIG. 23 is a perspective view of a main part showing another embodiment.

[Explanation of symbols]

 6A, 6B Cut beam 6C, 6D

──────────────────────────────────────────────────続 き Continuing on the front page (72) Mineo Kobayashi 1-12-19 Minamihorie, Nishi-ku, Osaka-shi, Osaka Hirose Co., Ltd. Osaka Main Store (72) Kameyoshi Nakata Ungamachi 3 (No. 3) Nihatsunai Co., Ltd. (72) Inventor Motonobu Sekoguchi 4-1-1, Honcho, Chuo-ku, Osaka-shi, Osaka Takenaka Corporation Osaka Main Store (56) References Jiko 2-40091 (JP) , Y2) J. 36-6723 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) E02D 17/04

Claims (1)

(57) [Claims] 1. A plurality of telescopic first cut beams (6A) are arranged in parallel at an interval, and a plurality of telescopic second cut beams (6B) are attached to the first cut beams (6A). A cutting beam device in which the first cutting beam (6A) group and the second cutting beam (6B) group are connected at a distance from each other in a posture perpendicular to the cutting beam.
Then , the first pair of prongs (6A) is connected to one end of the first cutting beam (6A) and the other end of the first cutting beam (6A).
And C), only setting a second pair of wale (6D) one portions and the other portions in a state that connects each of the second Setsuhari (6B), said first Setsuhari (6A) and the second cut
Each pair provided to be connected to each of the beams (6B)
(6C) and (6D) are pressed against the retaining wall
Girder with a telescopic mechanism provided at each end of each girder
apparatus.