JP2002081069A - Corner angle brace strut erecting device for slide type strut timbering - Google Patents

Abstract

PROBLEM TO BE SOLVED: To follow the pushing/pulling and introduction/release of preload of wales of a movable strut timbering, dispense with being detached from the strut timbering, immediately erect an earth retaining timbering, and to introduce preload to a corner part of the earth retaining wall in a corner angle brace for a slidable strut timbering in the underground skeleton construction method. SOLUTION: This corner angle brace strut erecting device 7 is so constituted that a horizontally extendable telescope type extension member 30 composed of an inner cylinder and an outer cylinder and a preload jack 31 for introducing preload to the earth retaining wall are serially connected together and diagonally disposed in the corner part of the strut timbering 1, one end of the extension member 30 is connected to one wale 11 by a horizontally rotatable pin hinge 32 and the like, and one end of the preload jack 31 is connected to the other wale 11 by the horizontally rotatable pin hinge 32 and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for erection of a corner cut-off beam for a slide-type beam supporting structure used in an underground framing construction method by a mountain retaining method required for safely constructing a building underground.

[0002]

2. Description of the Related Art Techniques for safely constructing a basement of a building in the ground are roughly divided into a method of constructing a retaining wall around the basement of the building and sequentially supporting the retaining wall with a temporary horizontal support. The underground construction space is created at the bottom of the building, and the basement is constructed from the lowest level.The basement is constructed sequentially from the upper floor to the lower floor while creating the minimum space to use the underground frame as a horizontal support. There is a reverse method. These techniques are employed in combination or alone depending on the construction conditions.

[0003]

The underpunch construction method has a high quality of the underground such as water stoppage because the underground skeleton is constructed in the same process as the construction on the ground, but it is necessary to temporarily secure the entire space for underground construction. Large amounts of temporary materials are required because The reverse beating method requires securing a space larger than the floor height required for the construction of the basement floor.However, in order to secure a space larger than this floor height without using temporary materials, The size of the mountain retaining wall is larger than that of.

Further, in order to secure the function as a shoring support by the conventional construction method, after excavation, a temporary horizontal support structure is erected and a preload is introduced in the forward driving method, or the main body horizontal structure is used in the reverse driving method. Needs to develop strength, and it takes about 1 to 3 weeks after completion of excavation. The deformation and stress that occur on the retaining wall is
During this period it has increased significantly.

[0005] In order to solve such problems, the present applicant has used a conventional beam-forming method using a permanent beam having a basement body structure and a movable cutting beam support as a support for underground construction. The large amount of temporary materials in the building can be eliminated, and the movable girder support can be quickly slid down and installed near the bottom of the excavation to suppress the deformation and stress generated on the retaining wall, thereby reducing the scale of the retaining wall. An application has been filed for a method of constructing an underground skeleton that can be made smaller and can simultaneously proceed with the construction of the underground skeleton and the ground excavation that can be expected to have an effect of shortening the construction period (Japanese Patent Application No. 9-20301).
3).

[0006] The present invention is an apparatus for erection of a corner fire cutoff beam erected at the corner of a corner of a slide-type beam supporter which is most suitable for carrying out this underground skeleton construction method. It is not necessary to remove the beam from the girder support by following the pushing and pulling of the support and the release and preload introduction / release, and after the girder support is slid down to the predetermined position, the retaining girder is immediately mounted. It is an object of the present invention to provide a corner fire beam erection device for a slide type shoring support that can be hung and can introduce a preload at a corner portion of a retaining wall.

[0007]

According to a first aspect of the present invention, there is provided an apparatus for erection of a corner fire-cutting beam for a slide-type beam support, as shown in FIGS. 1, 4 and 5, for example. A corner fire cutoff beam erection device that connects adjacent flares at the corners of a movable (vertical slide type) cutting beam support installed horizontally in a space, and a telescopic member that can expand and contract horizontally. A preload jack (hydraulic jack, etc.) that introduces a preload to the retaining wall is connected in series, and one end of the elastic member is rotatable horizontally with one end protruding by a connecting member (pin hinge, spherical hinge, etc.). The preload jack is connected to the other end of the preload jack by a horizontally rotatable connection member.

According to a second aspect of the present invention, there is provided a corner fire cutoff beam erection apparatus for a slide type beam support, wherein the expansion and contraction member is, for example, as shown in FIGS. As shown in the drawing, the outer cylinder, an inner cylinder movably housed in the outer cylinder, and a lock nut screwed to the inner cylinder to fix the outer cylinder and the inner cylinder are provided.

According to a third aspect of the present invention, there is provided a corner fire cutting beam erection device for a slide type beam supporter, wherein the preload jack is, for example, as shown in FIG. , As shown in FIG.
It is characterized by having a lock nut screwed to the rod and fixing the rod and the main body.

[0010] In the fourth aspect of the present invention, there is provided an apparatus for erection of a corner fire cutoff beam for a slide type beam support.
In the corner fire cutoff beam erection device described in the above, for example, as shown in FIG. A horizontal slide device comprising a moving member (a guide roller or the like) which is provided and moves with the connecting member as a guide is provided.

In the above configuration, the upper portion of the excavation space in the retaining wall is supported by the main beam and the floor of the underground main body structure, and the lower portion of the excavation space is supported by the cutting beam support. The preload of the girder support is released by the device and the bulge is retracted, and the girder support is slid down by the vertical slide device. At this time, the corner fire cutoff beam erection device located at the corner portion of the cutting beam support works by contracting the expandable member, so that the bulging X direction
It is possible to follow the pull-in operation in the Y direction. When the girder support slides down to a predetermined position near the bottom of the excavation, the jack device pushes out the bulge and introduces a preload. Also at this time, by extending the elastic member, it is possible to follow the pushing operation in the X and Y directions of the belly. Next, after locking the elastic member, the preload is introduced into the corner of the retaining wall by the preload jack. Thereby, when the deformation of the retaining wall is small, it is possible to quickly slide down the girder support and hang the support near the excavation bottom surface.

In order to support the retaining wall after excavation using the permanent beam of the underground main body structure and the movable girder support, a large amount of temporary material in the conventional continuous construction method is eliminated, and the temporary material is minimized. It can be. In addition, the movable girder support is quickly slid down and installed near the bottom of the excavation, leaving only a short time after completion of the excavation. Suppress rheological deformation behavior due to passive earth pressure on the excavated ground as a reaction force against pressure, and redistribute the effect of concentrating the active earth pressure on the shoring position confirmed by geotechnical engineering The effect of reducing the passive earth pressure on the excavated ground by reducing the earth pressure exerted earlier and effectively reducing the deformation and stress generated on the retaining wall can be easily used, and the size of the retaining wall can be reduced. can do. Furthermore, as soon as the excavation is completed, the floor can be constructed by sliding down the permanent beam as a support, so that the construction of the underground skeleton to be the support and the excavation of the ground can proceed at the same time. Can be reduced.

[0013] The corner fire cutoff beam erection device is composed of a telescopic member, a preload jack, and a connecting member such as a hinge. Therefore, the bulges that move forward and backward in the X and Y directions at the corners of the retaining wall are separated. It can be integrated and can also introduce a preload at the corners of the retaining wall. Further, it is not necessary to remove the beam from the beam support by the expansion and contraction member, and after the beam is slid down, the push-out and preloading of the belly can be performed immediately.

The telescopic member is composed of a telescope type outer cylinder and an inner cylinder, and has a structure in which the outer cylinder and the inner cylinder are fixed by a lock nut screwed to the inner cylinder. Can introduce a preload. Also, the preload jack can be easily fixed with the lock nut.

A horizontal sliding device is provided on a pair of upper and lower sliding devices arranged at a corner firing portion which is expanded and contracted by an elastic member or a preload jack, so as to absorb advancing and retreating. It can be suspended and the girder support can be slid down safely.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on one embodiment shown in the drawings. This embodiment is an example in which a slide type mountain retaining support system provided with a corner fire cutoff beam erection apparatus of the present invention is applied to the construction of an underground skeleton of a building on the third basement floor. FIGS. 1 to 12 show one embodiment of a sliding type mountain retaining support system provided with a corner fire cutoff beam erection device of the present invention.
This is an example. FIGS. 13 to 16 show an example of an underground skeleton construction method using a slide type mountain retaining support system in the order of steps.

As shown in FIGS. 1 to 12, in the method of constructing an underground skeletal structure by a slide-type retaining girder support system equipped with a corner fire beam erection device of the present invention, as shown in FIGS.
When the deformation of the retaining wall W is small, it is slid quickly down to quickly support the retaining wall W near the bottom of the excavation, and a movable girder support 1 (FIG. 1) and a floor 1F which is used as an upper support of the retaining wall W. Slide down the permanent beam 2 and the movable permanent beams 3-1 and 3-2 of B1F and B2F (FIG. 6), the cutting beam support 1 and the permanent beams 3-1 and 3-2 on the basement floor. The vertical slide device 4 (FIGS. 9 to 12) according to the present invention and the suspension support device 5 (FIGS. 7 and 8) for suspending and supporting the permanent beams 3-1 and 3-2 on the basement floor are used.

As shown in FIG. 1, the cut beam support 1 incorporates a jack system 6 and a corner fire cutoff beam erection device 7 according to the present invention. By combining the devices 4 and the like, a slide type mountain retaining support system is configured.

For the beam support 1, for example, the one shown in the plan view of FIG. 1 can be used. This girder support 1
For example, it is a rectangular shape in a plan view corresponding to the underground skeleton, and the cutting beams 10 are arranged vertically and horizontally, the four prongs 11 arranged at the four sides of the rectangle, the fire beam 12, and the cutting beams. It is composed of a joining block 13 to be joined. An aerating fire block is connected to a joint block portion of a rectangular main block composed of a cutting beam 10 and a joint block 13 located at the center via jack systems 6 in the X and Y directions, and a jack system 6 (described later). By actuating, the bulges 11 on the four sides move forward and backward with respect to the retaining wall W, respectively.

In such a girder support 1, a space is provided between the ends of the bulges 11 in the X and Y directions, and the bulges 11 on four sides can move forward and backward, respectively. With such a configuration, a corner fire cutoff beam erection device 7 and a corner protuberance 8, which will be described in detail later, are provided at the four corners of the beam support 1. The lower part of the vertical slide device 4 is connected to the portion a (shown by an oval) in FIG. In addition, the girder 10 and the corner fire brace girder erection device 7 of the girder support 1 are arranged so as to correspond to the large girder and the small girder of the permanent girder shown in FIG.

The joining block 13 is, as shown in FIG.
The upper and lower two joining plates 13a, 13a are
And the like, and the ends of the beam 10 or the jack system 6 are respectively joined to the four joint ends. In addition, an insertion hole 13c through which a slide guide / temporary support (hereinafter simply referred to as a temporary support) P can be inserted with a margin is formed at the center of the joining plate 13a. It can be slid down along the column P.

The girder support 1 slid down to a predetermined position is pushed out by the jack system 6 to protrude.
Although it is fixed to the retaining wall W by the introduction of the preload, the wedge member 1 as shown in FIG.
4 is fixed by driving the gap between the joining block 13 and the temporary support P from above. By using the wedge member 14, the central portion of the girder support 1 can be easily fixed to the temporary column P, and the fixing can be easily released even when the girder support 1 is slid down. Can be. In addition, the joining block 13 is divided into four parts so as to easily assemble a cutting beam or the like, and has a structure in which each divided body can be bolted via a joint plate.

As the jack system 6, for example, the one shown in FIG. 3 can be used. This jack system 6
Are the stroke jack 20 and the preload jack 21
Are connected in series. The tip plate 20b of the stroke jack 20 and the preload jack 21
The base end plate 21a is bolted through a liner 22 to be integrated. The base end plate 20a of the stroke jack 20 is detachably joined to the joining block 13 by bolts, and the tip end plate 21b of the preload jack 21 is protruded and is detachably joined to the cut beam 10 of the fire block by bolts ( (See FIG. 1).

The stroke jack 20 is provided with a cutting beam support 1
So that they can slide down
A telescopic telescopic device 23 comprising an outer cylinder 23a fixed to the plate 20a and an outer cylinder 23b fixed to the plate 20b; and a cylinder base provided inside the telescopic device 23. The end and the end of the piston rod are end plates 20a and 20b, respectively.
To consist hydraulic cylinder 24 which is pivotally attached, a relatively large stroke S ₁ is to be obtained. Further, a male screw 25 formed on the outer surface of the inner cylinder 23a over the entire length, and a lock nut 26 screwed with the male screw 25
Thereby, the stroke jack 20 can be fixed.

The preload jack 21 is a hydraulic jack having a relatively small stroke S ₂ for introducing a preload to the retaining wall W. This jack 21 is also provided with a male screw 25 formed on the outer surface of the plunger rod 21c over the entire length.
And a lock nut 26 screwed into the male screw 25 so as to be fixed.

When the girder support 1 is slid down, the stroke jack 20 is contracted so that the bulges 11 on each side are largely pulled in, and the plane shape of the girder support 1 is reduced to slide down. Let it. After reaching the predetermined position, the stroke jack 20 is extended, and the lock nut 26 is tightened to the outer cylinder 23a to fix the stroke jack 20.
And a preload is introduced into the retaining wall W. Thereafter, the preload jack 21 is fixed by the lock nut 26.

In the case of the conventional beam support (progressive construction method),
After the excavation, it was a troublesome and time-consuming work to locate the position, attach the holding hardware, assemble the belly, assemble the girder, and introduce the preload, but the girder support 1 of the present invention Since the cutting beam 10 and the belly 11 are integrally assembled via the jack device 6, and since the jack device 6 is composed of the stroke jack 20 and the preload jack 21 having a large stroke, the jack device 6 protrudes. The simple and quick work of pushing and pulling the support 11 allows the girder support 1 to slide down, the girder support 1 to be installed at a predetermined position and a preload to be introduced. And the construction period can be shortened. In addition, since the retaining wall W can be supported early in the vicinity of the excavation bottom surface to suppress deformation and stress generated in the retaining wall, the size of the retaining wall W can be further reduced.

As the corner fire cutoff beam erection device 7, for example, the one shown in FIG. 4 can be used. This corner fire-cutting beam erection device 7 connects these belly-ups 11, 11 at the corners of the beam support 1 so that they can follow the up-and-down movement of the belly 11 in the X and Y directions. ,And,
It is configured so that a preload can be introduced together with the jack system 6 described above, and mainly includes a telescopic telescopic member 30.
And a preload jack 31.

The telescopic telescopic member 30 has a structure in which the hydraulic cylinder is removed from the telescopic telescopic device 23 of the jack system 6, and the inner cylinder 30 is formed inside the outer cylinder 30a.
When b moves forward and backward, it can freely expand and contract. The preload jack 31 may be the same as the preload jack 21 of the jack system 6.

The telescopic telescopic member 30 and the preload jack 31 are integrated by joining the end plates with bolts. The base plate of the telescopic telescopic member 30 and the side surface of the belly 11 are connected via a pin hinge 32 and a liner 33. The tip of the preload jack 31 and the side surface of the belly 11 are also pin hinges 32 and liners 33.
Connect through. The pin hinge 32 has a structure in which a pair of hinge members are connected by a vertical pin 32a.
The change in the horizontal angle of the telescopic telescopic member 30 due to the forward / backward movement of the telescope can be absorbed.

Such a corner fire cutoff beam erection device 7
When the planar shape of the girder support 1 is reduced in order to slide down the girder support 1, the telescopic telescopic member 30 contracts, slides down to a predetermined position, and moves to the predetermined position. When the planar shape is enlarged, the telescopic telescopic member 30 extends, and the belly 11 in the X direction and the belly 11 in the Y direction can be connected to each other while following the forward and backward movement of the belly 11.

At the time of preloading, the telescopic telescopic member 30 is fixed by tightening the lock nut 35 screwed to the male screw 34 of the inner cylinder 30b of the telescopic telescopic member 30 to the outer cylinder 30a. The preload jack 31 is extended to introduce the preload into the retaining wall W. Thereafter, the preload jack 31 is locked by a lock nut 35 screwed into the male screw 34 of the preload jack 31.
Is fixed.

FIG. 5 shows an example in which a spherical hinge (ball hinge) 36 is used in place of the pin hinge 32 in the corner fire cutoff beam erection device 7. In this case, the spherical hinge 36 is mounted on the protruding part 11 via the mounting piece 37 having the inclined mounting surface. Mounting piece 37 is corner piece 3
Reinforce with 8.

By providing the corner fire beam erection device 7 at the four corners of the beam support 1 as described above,
At the corners of the retaining wall W, the prongs 11 that move forward and backward in the X and Y directions can be integrated with each other,
Further, the preload can be introduced into the corner of the retaining wall W by the preload jack 31. In addition, since the telescopic telescopic member 31 and the hinges 30 and 36 can follow the expanding and contracting operation of the girder support 1, it is not necessary to remove the corner fire brace beam erection device 7 from the girder support 1, and the girder support is constructed. Immediately after sliding down 1, the bulging 11 can be pushed out and the preload can be introduced.

As the corner protuberance 8, for example, the one shown in FIG. 4 can be used. The corner bulge 8 is a plate-shaped member having the same thickness as the bulge 11, and includes a corner bulge block 8a, a pair of wedge members 8b, a wedge pressing member 8c, and the like.

First, before the cutting beam support 1 is slid down, the corner bulging block 8a is connected to the cutting beam support 1.
Is suspended by a vertical moving device such as a chain block or the like to a predetermined position for installation, and is fixed to a corner of the retaining wall W with a bolt. Next, the cut beam support 1 having a reduced planar shape is slid down to the installation position, and the bulge 11 is set on the retaining wall W by extrusion and preload introduction. The wedge member 8b is inserted from the inside into the gap between the end and the wedge member 8b, and then the wedge pressing member 8c is fixed to the corner protruding block 8a by the bolt and nut 8d so that the wedge member 8b does not come off.

The four corner portions of the girder support 1 are integrally connected by the corner protuberances 8 as described above, so that a complete mountain retaining support can be formed.

Using the girder support 1 having the above structure, the jack system 6, the corner fire brace beam erection device 7, and the corner prong 8, the slide down of the girder support 1 is performed in the following procedure. I do.

(I) In sliding down the girder support 1 supported by the below-described vertical slide device 6, the retaining wall above the girder support 1 is supported by the permanent beam and the floor. After confirming that the preload jacks 21 and 31 of the jack system 6 and the corner fire cutoff beam erection device 7 are in place.
After releasing the preload in the X and Y directions, the wedge member 8b for the corner belly is held down and the bolt / nut 8 of the holding member 8c is released.
By loosening d, it is separated from the belly 11, and the stroke jack 20 of the jack system 6 pulls the belly 11 in the X direction and the Y direction sequentially or simultaneously, thereby reducing the planar shape of the girder support 1. At this time, since the joint portion between the corner fire cutoff beam erection device 7 and the bulge 11 is a rotatable mechanism, it can follow the reduction operation of the cutoff beam support 1.

(Ii) The corner protruding block 8a is lowered by the vertical moving device, and is fixed to the corner of the retaining wall W at the installation position of the girder support 1.

(Iii) The girder support 1 having a reduced planar shape is slid down to the installation position by the vertical slide device 4.

(Iv) The girder 10 on the protruding side of the girder support 1
Is movably supported by a horizontal slide device (described later) provided below the vertical slide device 4, and is moved by the stroke jack 20 of the jack system 6 in the X direction and the Y direction.
After pushing out the belly 11 in the direction, and then locking the stroke jack 20, the preload jack 21
A certain preload is introduced in advance (preload before final predetermined preload introduction).

(V) The corner fire breaking beam erection device 7 is suspended by the vertical slide device 4 and is movably supported by a horizontal slide device described later.
The telescopic telescopic member 30 extends following the movement of the belly 11 in the X and Y directions. From this state, after locking the telescopic telescopic member 30, the preload jack 31 is pushed out (preload before the final predetermined preload introduction), and the plane shape of the girder support 1 is adjusted.

(Vi) The preload jack 21 of the jack system 6 in the beam support 1 is used for the final X direction.
A predetermined preload in the Y direction is introduced. Thereafter, a predetermined preload at the final corner is introduced by the preload jack 31 of the corner fire beam erection device 7.

(Vii) Finally, insert the wedge member 8b, fix it to the corner protruding block 8a, and protrude the four sides.
Are integrated through the corner protruding part 8. From the above,
The girder support 1 slid down to a predetermined position functions as a support for the retaining wall W. The corner fire beam erection device 7 does not need to be removed from the beam support 1,
Immediately after the slide-down of the girder support 1, the work of setting up the girder support can be started.

1F, B1F, B2F main beams 2, 3-
As 1 and 3-2, for example, those shown in the plan view of FIG. 6 can be used (B1F and B2F in the illustrated example). These permanent beams have, for example, a rectangular shape in plan view similarly to the girder support 1 and have large beams 40 arranged vertically and horizontally, diagonal small beams 41 arranged at corners, and large beams at the center. And a joining plate 43 that joins the girders together at four sides of the outer periphery. In addition, girder 4
0 and the small beam 41 are arranged at the same position as the cutting beam 11 and the corner fire cutoff beam erection device 7 in FIG. 1, respectively.

Main beams 3-1 and 3 on basement floors B1F and B2F
-2 is slid down to a predetermined installation position by a vertical slide device 4 described later. The vertical slide device 4 is
It is connected to the part a (shown in common with the girder support 1) and the part b (dedicated to the permanent beam) shown by the oval in FIG.

As shown in FIG. 7, the joining plate 42 at the center is provided in a pair so as to sandwich the joining end of the girder 40 from above and below, and the upper and lower flanges of the girder 40 are joined together by bolts. You. In addition, an insertion hole 42a through which the temporary support P can be inserted with a margin is formed at the center of the joining plate 42, and the permanent beams 3-1 and 3-1 on the basement floor are formed along the multiple temporary support P. You can slide down. As shown in FIG. 6, the joining plate 43 on the outer peripheral portion also
It has the same configuration as the joining plate 42 at the center. However,
There is no temporary support P in the joint plate 43, and a through hole 43a for the support is formed.

The suspension support device 5 is a device for suspending and fixing the main beams 3-1 and 3-2 of the underground floor having the above-described configuration at a predetermined position. As shown in FIG. A bar rebar 50 (suspension rod) can be used. The screw rebar 50 is provided so as to penetrate the joint plate 42 at the center so as to surround the temporary support P, and is extended integrally to the base slab by adding the lower portion with a coupler. It is used as a part of the reinforcement of RC column or SRC column C. Similarly, a threaded reinforcing bar 50 is also provided on the outer peripheral joint plate 43.

As shown in FIG. 8, the upper part of the suspension support device 5 using the screw rebar 50 is fixed to the main beam 2 on the first floor. That is, the upper joint plate 42 (4
3) A hairdressing member 51 made of a pair of channel materials is disposed on the upper part, and the upper part of the screw rebar 50 is inserted into a gap between the hairpinning members 51 and fixed with a nut 52. For example, as shown in FIG. 8C, if the nut 52 is divided into two parts in the lateral direction and the divided bodies 52a and 52b are fastened with bolts 52c, the nut 52 can be easily fixed from the lateral direction. As shown in FIG. 7 (b), basement floor B1F / B2F
The main beams 3-1 and 3-2 also have nuts 52 mounted vertically.
To fix to the screw reinforcement 50. As shown in FIG. 13, only the permanent beam 3-2 of B2F is fixed to the threaded reinforcing bar 50, and the permanent beam 3 of the basement floor B1F is placed on the permanent beam 3-2 of B2F via a stand. -1 may be placed.

Some of the threaded reinforcing bars 50 arranged in the column C shown in FIG. 7 are used as suspension rods of the suspension support device 5. For example, as shown in FIG.
A total of eight screw rebars 50 are used as suspension rods as two pairs at the corners.

The above-mentioned suspension support device 5 can be composed of the suspension rod 50, the hairpin member 51 and the nut 52.
1, 3-2 can be suspended and supported. In addition, by using the hanging rod 50 as a part of a reinforcing bar of a column on the basement floor as a threading reinforcing bar, it is possible to reduce the apparatus cost and speed up the operation.

The vertical slide device 4 grips the cutting beam support 1 and slides it down, and the basement floor B1F / B2F
The main beams 3-1 and 3-2 are stacked and slid down. For example, the devices shown in FIGS. 9 to 12 can be used. As shown in FIG. 9, the vertical slide device 4 is roughly divided into an elevating device 60 and a grip device 61.
It is composed of

The lifting device 60 comprises an electric chain block 62 and a chain 63 as shown in FIG. The electric chain block 62 includes the large beam 40 of the main beam 2 on the first floor.
It is suspended and fixed by a hook or the like to one end of a horizontal suspension member 65 installed on the (a small beam 41 in the corner portion) via a bundle member 64. This electric chain block 62
The chain 63 extended from the pulley 6 of the gripping device 61
After being wound around 6, the front end is fixed to the other end of the horizontal suspension 65. Accordingly, the gripping device 61 can be moved up and down by winding up and feeding out the chain 63 by the electric chain block 62.

The gripping device 61 is used to cut the beam 10 of the beam support 1.
And a stack 70 of a pair of arms 70a which can be opened and closed in the horizontal direction, as shown in FIGS. 9 and 10, for example.
Fixing member 71 attached to lower flange of cutting beam 10
And a mounting plate 73 installed on the horizontal mounting member 72 of the chuck 70.

As shown in FIG. 10, the upper ends of a pair of arms 70a of the chuck 70 are rotatably mounted on both ends of a horizontal mounting member 72 via shafts 74 in the horizontal direction. The pulley 66 of the chain 63 is rotatably attached to the shaft 74. Lower ends of a pair of left and right arms 70a, 70a of such a chuck 70 are detachably attached to lower portions of a pair of left and right fixing members 71, 71 by fixing pins 75, respectively. The shaft 74 has a chuck 70.
A torsion coil spring 76 for pressing the arm outward is attached, and the chuck 70 can be kept open.

Here, as shown in FIG.
When the fixing member 71 of the vertical slide device 4 is fixed to the moving cutting beam 10, the device is damaged. The pair of up-and-down sliding devices 4 and 4 arranged in the fire block are connected by a horizontal sliding device 80, and guide and support the cutting beam 10 so that it can move forward and backward.

The horizontal slide device 80 includes a connecting member 81
And the sliding bearing 82. As shown in FIG. 9, the connecting member 81 is disposed below the jack system 6 and the cutting beam 10, and the end on the temporary support P side is fixed to the lower plate of the joining block 13. The four fixing members 71 are fixed to the side surfaces at both ends of the connecting member 81, respectively. The slide bearing 82 is fixed to the upper surface of the connecting member 81 at the position of the vertical slide device 4 on the protruding side, and the sliding support 82 supports the cut beam 10 on the prone side so as to be able to move forward and backward.

FIG. 10A shows the details of the vertical slide device 4 on the prone side on which the sliding bearing 82 is located.
Is fixed on the plate 83, and the slide bearing 82 is fixed on the plate 83 with screws. In the fixing member 71,
The one having the upper hook 71a is used, and
1 is fixed from both right and left sides by bolts and nuts 84, and the lower flange of the cutting beam 10 is movably guided and supported by the upper hook 71a.

As shown in FIG. 9, the fixing member 71 of the vertical slide device 4 on the temporary support column side has no upper hook, and is fixed to both side surfaces of the connecting member 81. Further, since the vertical slide device 4 disposed in the portion b dedicated to the main beam (see FIG. 6) inside the temporary support P only needs to place the main beam, the fixing member 71 is attached to the lower surface of the cutting beam 10. It does not have to be fixed.

FIG. 11 shows an example of the vertical slide device 4 connected to the corner fire breaking beam erection device 7 (small beam 41) at the corner. In this case, too, the horizontal slide device 90 is used for the same reason as described above. Used. The horizontal slide device 90 includes a connecting member 91 also serving as a guide rail made of a pair of channel members disposed opposite to each other, and the connecting member 91.
A guide roller 92 that rolls inside is used.

The vertical slide device 4 is the same as that arranged on the cutting beam 10, but a fixing member 71 is fixed to a connecting member 91, and a pair of left and right vertical slide devices 4 is connected and integrated. The guide rollers 92 are provided below the liner 33 of the telescopic telescopic member 30 and the preload jack 31, respectively, so that the telescopic telescopic member 30 and the preload jack 31 can move forward and backward as the belly 11 moves forward and backward, respectively. Guide and support.

In the vertical slide device 4 having the above-described structure, as shown in FIG. 12, the cutting beam support 1 and the permanent beams 3-1 and 3-2 are slid down in the following procedure.

(I) When the lower space is excavated in the state shown in FIG. 9, as shown in FIG. 12 (i), the electric chain blocks 62 of the many vertical slide devices 4 are operated synchronously,
Slide the girder support 1 down to near the bottom of the excavation.

(Ii) After confirming that the cutting beam support 1 is functioning as a shoring support by the operation of the jack system 6, as shown in FIG. 70 is opened and detached from the fixing member 71. Next, the chuck 70 is
Is lifted up, and B2 abuts on the mounting plate 73 on the upper surface of the chuck.
The main beam 3-2 of F is fixed to the mounting plate 73 with bolts. A rod that suspends and supports the main beam 3-2 (screw bar)
And leave it in the chuck 70. Main beam 3-1 of B1F
Is mounted on the B2F permanent beam 3-2 via a table.

(Iii) The electric chain blocks 62 of the many vertical slide devices 4 are operated in synchronization with each other, and FIG.
As shown in (2), the main beams 3-1 and 3-2 placed on the back of the chuck 70 are slid down so that the main beam 3-1 is located on the first basement floor. Main beam 3-1 and 3-2
Is suspended by a rod and fixed. The chuck 70 is located above the girder support 1 in an open state.

(Iv) After confirming that the permanent beams 3-1 and 3-2 are suspended and fixed, the chuck 70 and the permanent beams 3-2 are fixed.
And the chuck 70 is slightly lowered by the electric chain block 62, as shown in FIG.
The chuck 70 is closed, and the tip of the arm is fixed to the fixing member 71 of the girder support 1 with the fixing pin 75. Next, the above steps are repeated, and the cutting beam support 1 is slid down,
The main beam 3-2 is slid down to the second basement floor.

The vertical slide device 4 as described above is composed of a lifting device 60 such as an electric chain block and a gripping device 61 having a chuck, a mounting plate and the like. Both the support 1 and the main beams 3-1 and 3-2 on the basement can be slid down quickly and safely. Further, horizontal slide devices 80 and 90 are provided on a pair of upper and lower slide devices 4 arranged at the bellows fired block portion and the corner fired portion where the cutting beam support 1 moves forward and backward to absorb the forward and backward movement. The beam support 1 can also be suspended at a portion where the beam support 1 moves forward and backward, and the cutting support 1 can be slid down safely.

An example of constructing an underground skeleton using the above-described various devices will be described in the order of steps (FIG. 1).
3 to 16). [A] Until the start of the slide construction (a-1) As shown in Fig. 13, a temporary support P is erected on the foundation pile which is cast in the ground where the building is to be constructed, and a mountain retaining wall (soil) (Mortar column wall) W is constructed.

(A-2) After the construction of the retaining wall, primary excavation is performed to a predetermined depth in the retaining wall W as shown in FIG.
Pile concrete between the excavations as needed.

(A-3) As shown in FIG. 13, the girder support 1 is assembled near the bottom surface of the excavation in the primary excavation space, and the jack system 6 and the corner fire brace beam erection device 7 are used to protrude. Introduce extrusion and preload.

(A-4) As shown in FIG. 13, the permanent beam 3-2 of B2F is arranged on the cutting beam support 1, the deck plate is laid, and the floor is laid. Temporarily assemble the floor structure of B2F. Next, on this permanent beam 3-2 of B2F, B
Arrange the main beam 3-1 on the first floor, lay a deck plate,
Arrange floor reinforcement and temporarily assemble the floor structure of B1F.

(A-5) As shown in FIG. 13, the main beam 2 on the first floor is provided, a deck plate is laid, the floor is laid, concrete is cast, and the floor on the first floor is laid. To construct. In addition, the floor of this 1F can also utilize a precast member.

(A-6) As shown in FIG. 13, in the state where the main beam 2 of 1F is erected, the vertical slide device 4 and the upper part of the suspension rod 50 are attached to the main beam 2, and The lower part of the device 4 is connected to the girder 10 of the girder support 1, and the B2F main beam 3-2 is suspended from the main beam 2 of the 1F by a hanging rod 50 and fixed. B1F permanent beam 3-
1 is mounted and fixed on the B2F main beam 3-2 via a table.

[B] Sliding work (reverse construction method) (b-1) As shown in FIG. 13, the upper part of the retaining wall W is supported by the cutting beam support 1 and the permanent beam 2 of 1F. Then, secondary excavation is performed to a predetermined depth. This secondary drilling and 1
The floor construction of F can be performed simultaneously.

(B-2) When the secondary excavation is completed, as shown in FIG. 13, after confirming that the floor on the first floor can function as a support, the jacking systems 6 and 7 can be used to support the cutting beam support 1.
Release the preload and pull in the stomach. Thereafter, the cutting beam support 1 is slid down to a predetermined position by the vertical slide device 4.

(B-3) As shown in FIG. 13, when the girder support 1 is located near the bottom of the excavation, the jack system 6
・ Use 7 to push out the stomach and introduce preload.

(B-4) As shown in FIG. 13, after the vertical slide device 4 is changed from the cutting beam support 1 to the B2F permanent beam 3-2, the B2F permanent beam 3-2 is replaced with the B2F permanent beam 3-2. The fixing of the suspension rod 50 is released.

(B-5) As shown in FIG. 14, the B1F / B2F permanent beams 3-1 and 3-
Slide down 2 to position the main beam 3-1 of B1F at the first basement level.

(B-6) As shown in FIG.
The suspension rod is added to the lower part of the suspension rod 50 used in the step by a coupler, and the permanent beam 3-2 of B2F is suspended and fixed by the suspension rod 50. Main beam 3-1 of B1F
Is suspended and fixed by a newly provided suspension rod 50.

(B-7) As shown in FIG. 14, the vertical slide device 4 is changed from the B2F main beam 3-2 to the cutting beam support 1.

(B-8) As shown in FIG. 14, the outer peripheral beam portion of the B1F is reinforced, and concrete is poured into the outer peripheral beam portion and the floor (where the reinforcement is provided on the deck plate). ,
Build B1F floor. In some cases, the B1F floor may be constructed with the B2F main beam 3-2 suspended by the vertical slide device 4.

(B-9) As shown in FIG. 14, B1F concrete is poured, and tertiary excavation is started.

(B-10) As shown in FIG. 14, when the tertiary excavation is completed, after confirming that the floor of B1F can function as the support, the jack system 6.7 performs the preloading of the cutting beam support 1. Perform opening and prostration.

(B-11) Thereafter, as shown in FIG.
The girder support 1 is slid down to a predetermined position by the vertical slide device 4, and the jack systems 6 and 7 are used to push out the belly and introduce a preload.

(B-12) As shown in FIG. 14, after the vertical slide device 4 is changed from the cutting beam support 1 to the B2F permanent beam 3-2, the B2F permanent beam 3-2 is replaced with the B2F permanent beam 3-2. The fixing of the suspension rod 50 is released.

(B-13) As shown in FIG. 15, the B2F main beam 3-2 is slid down by the vertical slide device 4, and the B2F main beam 3-2 is positioned at the second basement level. .

(B-14) As shown in FIG. 15, a suspending rod is added to the lower part of the suspending rod 50 on which the main beam 3-2 of B2F was suspended in the previous process by a coupler. Is suspended and fixed.

(B-15) As shown in FIG. 15, the vertical slide device 4 is changed from the permanent beam 3-2 of the B2F to the cutting beam support 1.

(B-16) As shown in FIG. 15, the outer peripheral beam portion of the B2F is reinforced, and concrete is poured into the outer peripheral beam portion and the floor (the deck plate is reinforced). ,
Build a B2F floor. In some cases, the B2F floor may be constructed while the B2F main beam 3-2 is suspended by the vertical slide device 4.

(B-17) As shown in FIG. 15, B2F concrete is poured, and the fourth excavation is started.

(B-18) When the fourth excavation is completed, as shown in FIG. 15, after confirming that the floor of the B2F can function as a support, the jack systems 6 and 7 perform preloading of the cutting beam support 1. Perform opening and prostration.

(B-19) Thereafter, as shown in FIG.
The girder support 1 is slid down to a predetermined position by the vertical slide device 4, and the jack systems 6 and 7 are used to push out the belly and introduce a preload.

(B-20) Next, as shown in FIG.
Next excavation is performed.

[C] Construction of an underground skeleton in accordance with the progressive driving method (c-1) From the state shown in FIG.
Of the floor (RC construction).

(C-2) Foundation slab and B3F floor (RC construction)
After confirming that can function as a shoring, cut beam shoring 1
To dismantle and remove.

(C-3) Build a rising wall / column of B3F. (c-4) Build the rising wall and pillar of B2F.

(C-5) Build a rising wall / column of B1F. For the column, a suspension rod (screw bar) 50 is used as a part of the reinforcing bar. Thus, the construction of the underground skeleton is completed.

[0099] With respect to the foundation slab, it is difficult to construct the foundation slab when the girder support is laid at or near the foundation slab in order to resist a large earth pressure. In such a case, two-stage striking of the base slab is used. In addition, the girder support 1 can also be used as a permanent beam of B3F by replacing the jack system 6, the corner fire brace beam erection device 7, and the like with a beam member.

FIG. 17 shows another example of the corner bulging, in which a square auxiliary piece 100 and two jacks 101 are used in plan view, and the jack 101 is attached to one end of the bulging 11. In advance, the auxiliary piece 100 and the jack 101 are set after the bulging 11 is overhanging.

[0101]

According to the present invention, the corner fire breaking beam erection apparatus for a sliding type beam supporting structure according to the present invention has the above-described structure, and the following effects can be obtained.

(1) Since the corner fire breaking beam erection device is composed of a telescopic member, a preload jack, and a connecting member such as a hinge, the flank which moves forward and backward in the X direction and the Y direction at the corner of the retaining wall, respectively. Can be integrated with each other.

(2) The preload can be introduced into the corners of the retaining wall, and the retaining wall can be reliably supported.

(3) It is not necessary to remove the beam from the beam support by the elastic member.
It is possible to immediately push out the bulge and introduce a preload, thereby enabling quick support work and shortening the construction period.

(4) The telescopic member is composed of a telescope-type outer cylinder and an inner cylinder, and the outer cylinder and the inner cylinder are fixed by a lock nut screwed to the inner cylinder. Thus, a preload can be easily introduced. Also, the preload jack can be easily fixed with the lock nut.

(5) A corner which expands and contracts by a telescopic member or a preload jack. A pair of vertical sliding devices arranged on a fired portion is provided with a horizontal slide device to absorb the advance and retreat movement, so that the corner for moving the cutting beam support forward and backward. It can be hung even at the fired part, and the girder support can be slid down safely.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a girder support used in a slide type mountain retaining support system of the present invention.

FIGS. 2A and 2B are an example of a joining block of the girder support of FIG. 1, in which FIG. 2A is a plan view and FIG. 2B is a perspective view.

FIG. 3 is an example of the jack system of the girder support of FIG. 1, (a) is a side view in a contracted state, (b) is a view seen from the left,
(c) is a view seen from the right, and (d) is a side view in an extended state.

FIG. 4 is an example of a corner fire brace beam erection device and a corner bulge of the girder support of FIG. 1, (a) is a plan view of the whole, and (b) is a side view of a joint portion.

5 is a plan view showing an example in which a joint portion of the corner fire cutoff beam erection device of FIG. 4 is different.

FIG. 6 is a plan view showing an example of a permanent beam used in the method of constructing an underground skeleton according to the present invention.

7 is an example of a connection plate (basement floor) and a suspension support device of the permanent beam shown in FIG. 6, (a) is a plan view, and (b) is a front view.

8 is an example of a connection plate (first floor) of a permanent beam and a suspension support device of FIG. 6, (a) is a plan view, (b) is a front view,
(c) is a transverse sectional view of the nut, and (d) is a longitudinal sectional view of the nut.

FIG. 9 is an example of a vertical slide device used in the method of constructing an underground skeleton according to the present invention, wherein (a) is a side view and (b) is a front view.

10 is an example of a gripping device and a horizontal sliding device of the vertical sliding device of FIG. 9, (a) is a front view, and (b) is a side view.

11 is an example of a gripping device and a horizontal sliding device of the vertical sliding device in the corner fire cutoff beam erection device of FIG. 4, (a) is a front view, and (b) is a side view.

12 is a side view showing the cutting beam support and the sliding down of the main beam (basement floor) by the vertical slide device of FIG. 9 in the order of processes.

FIG. 13 is a cross-sectional view illustrating steps of a method of constructing an underground skeleton according to the present invention.

FIG. 14 is a cross-sectional view showing steps of a construction method for an underground skeleton according to the present invention.

FIG. 15 is a cross-sectional view showing steps of a method of constructing an underground skeleton according to the present invention.

FIG. 16 is a cross-sectional view showing the steps of the construction method of the underground skeleton according to the present invention.

FIG. 17 is a plan view showing another example of the corner protuberance of the present invention.

[Explanation of symbols]

 W ... Mounting wall P ... Slide guide / temporary column C ... RC column or SRC column 1 ... Movable beam support 2 ... Permanent beam (1F) 3 ... Movable permanent beam (B1F B2F) 4 Vertical sliding device 5 Hanging support device 6 Jack system 7 Corner fire beam erection device 8 Corner bulging 8a Corner bulging block 8b Wedge member 8c Wedge Holding member 10 Cutting beam 11 Bending 12 Fire beam 13 Joining block 13a Joining plate 13b Vertical rib 13c Inserting hole 14 Wedge member 20 Stroke jack 20a, 20b End Part plate 21 Preload jack 21a, 21b End plate 21c Plunger rod 22 Liner 23 Telescopic telescopic device 23a Outer cylinder 23b Inner cylinder 24 ... Hydraulic cylinder 25 ... Male screw 26 ... Lock nut 30 ... Telescopic telescopic member 30a ... Outer cylinder 30b ... Inner cylinder 31 ... Preload jack 32 ... Pin hinge 32a ... Vertical pin 33 ... Liner 34 ... Male screw 35 Lock nut 36 Spherical hinge 37 Mounting piece 38 Corner piece 40 Large beam 41 Small beam 42 Joint plate (central part) 42a Inserting hole 43 Joint plate ( Outer peripheral portion) 43a Through hole 50 Screw rebar (suspension rod) 51 Cross hair member 52 Nut 60 Lifting device 61 Gripping device 62 Electric chain block 63 Chain 64 Bundle Member 65 Horizontal suspension member 66 Pulley 70 Chuck 70a Arm 71 Fixed member 71a Upper hook 72 Horizontal mounting member 73 Mounting plate 74 Shaft 75 Fixing pin 76 Torsion coil spring 80 Horizontal sliding device 81 Connecting member 82 Sliding bearing 83 Plate 84 Bolt / nut 90 horizontal slide device 91 connecting member (guide rail) 92 guide roller 100 auxiliary piece 101 jack

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideo Ouchi 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Takeshi Isano 1-2-1-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 Inside Kashima Corporation (72) Inventor Norihiko Iwata 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Corporation (72) Inventor Yukio Uda 1-2-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 Kashima Construction Co., Ltd. (72) Inventor Junichi Motohashi 4-4 Midori, Sumida-ku, Tokyo Yoshinaga Machinery Co., Ltd. F-term (reference) 2D047 AB04

Claims (4)

[Claims] 1. A corner fire cutoff beam erection device for connecting adjacent bellows at a corner portion of a movable cutoff beam support installed horizontally in an excavation space in a retaining wall,
A telescopic member that can expand and contract in the horizontal direction and a preload jack that introduces a preload to the retaining wall are connected in series, and one end of the expandable member is connected to one protruding part by a horizontally rotatable connection member, A corner fire cutoff beam erection device for a sliding cutoff beam support, wherein one end of a preload jack is connected to the other prong by a horizontally rotatable connection member. 2. The corner fire cutoff beam erection device according to claim 1, wherein the elastic member includes an outer cylinder, an inner cylinder movably housed in the outer cylinder, and an outer cylinder screwed into the inner cylinder. A slidable cutting beam support corner erection beam erection device, comprising a lock nut for fixing the cylinder and the inner cylinder. 3. The corner fire cutoff beam erection device according to claim 1, wherein the preload jack is provided with a lock nut screwed into the rod and fixing the rod and the main body. The corner fire cutoff beam erection device of the slide type beam support. 4. A connecting member to which a lower part of a pair of upper and lower sliding devices for sliding down a movable cutting beam supporter is connected, in the corner fire cutting beam erection device according to claim 1, 2 or 3. And a horizontal slide device comprising a movable member which is provided on each of the telescopic member and the preload jack and moves with the connecting member as a guide.