JPH08144283A - Landslide protection wall timbering material - Google Patents

Abstract

PURPOSE: To conduct the assembly of a length-adjusting member mainly on the ground, to remove high-place operation and improve safety, to economize jack hire because a Jack is removed and a hydraulic jack can be diverted on its midway even when the hydraulic jack is used as a pre-load jack, to utilize the jack as one having large stroke width by previously combining the jack and an adjusting material and to introduce sufficient pre-load. CONSTITUTION: A landslide protection wall timbering material consists of an outer box material 11 and an extension material 12 inserted into the outer box material 11 from an end section as an expansion member previously bonded with a landslide protection wall timbering main material on the ground, and an opening 17 is formed to the top face of the end section in the outer box 11. A hydraulic jack 20, which is taken in and out freely from the opening 17, and adjusting materials 21a-21c are disposed in a clearance between the end of the extension material 12 and another end of the opening 17 in the outer box material 11, and the extension material 12 after movement by the hydraulic jack 20 and the outer box material 11 are fixed by temporary assembling bolts 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mountain retaining material for excavation work as a foundation work for construction of a basement floor of a building or construction of an underground structure.

[0002]

2. Description of the Related Art As a mountain retaining material, as shown in FIG. 12, an agitated main material 2 along a mountain retaining wall 1 and a beamed main material 3 orthogonal to the agitated main material 2 are provided. However, the length of the main beam 3 for cutting is adjusted at the final stage, and preloading or the like for counteracting earth pressure is performed.

As shown in FIG. 13, the length is adjusted by adjusting member 4.
It is done by arranging, and the preload is the giraffe jack 5.
This is done by incorporating a preload jack such as a hydraulic jack or a hydraulic jack and adding its propulsion force.

In the drawing, 6 is a main material for smashing, 7 is a piece for receiving smashing, and 8
Is a corner piece, 9 is a jack reinforcement piece, and 10 is an intersection piece. The structure of the mountain retaining wall 1 is H as shown in the figure.
There are various types such as steel pipe piles and sheet pile systems, as well as steel pipe piles and concrete column piles.

[0005]

The adjusting material 4 has a width of 100.
It is about 500 mm, and it is installed separately from the Kirin jack 5, which is a preload jack. Further, this assembling work also becomes an aerial work, but the preloading work for operating the giraffe jack 5 also becomes an aerial work at the final stage of the temporary construction of the beam.

Furthermore, since the giraffe jack 5 has a short stroke, it may not be possible to introduce a sufficient preload, and since earth pressure is applied during removal,
The giraffe jack 5 cannot be loosened and there is a problem that the jack handle is damaged by a large hammer.

On the other hand, even when the hydraulic jack is used instead of the giraffe jack 5, the adjusting material still has to be adjusted at the stage of erection of the main beam 3 with the beam, and this hydraulic pressure is applied to the end. The loss is high because the jack cannot be removed.

The object of the present invention is to eliminate the disadvantages of the above-mentioned conventional example, the member for adjusting the length can be incorporated mainly on the ground, work at height can be eliminated, and the safety can be improved. Even if a hydraulic jack is used as the preload jack, the jack can be removed and diverted on the way, which saves jack damage and the jack can be used with a large stroke width by combining it with an adjustment material in advance. The purpose of the present invention is to provide a mountain retaining material that can introduce various preloads.

[0009]

In order to achieve the above-mentioned object, the present invention firstly comprises an outer box material and an end portion inside the outer box material as an elastic member which is preliminarily connected to the mountain retaining support main material on the ground in advance. The outer box material has an opening formed on the upper surface of the end, and the hydraulic jack that can be inserted and removed freely through this opening and the adjustment material that the hydraulic jack abuts are placed inside the outer box material. The adjusting member is arranged in a gap between the moving member and the outer casing member after being moved by the hydraulic jack, and is fixed with a temporary assembly bolt. Secondly, the adjusting member is plate-shaped and has a different thickness. The main point is to select from several types, and thirdly, the hydraulic jack is to be put in and taken out from the opening together with the U-shaped jack receiving base.

[0010]

According to the present invention as set forth in claim 1, the outer box material and the elongate material constituting the elastic member are preliminarily bonded on the ground to the sill beam main material which is the main material of the mountain retaining support, and the outer box. It can be erected with the stretched material inserted from the end into the material. And
If the hydraulic jack and the adjusting material with which this hydraulic jack abuts are arranged through the opening in the gap between the extending material end in the outer box material and the hydraulic jack is extended, the extending material is pushed out through the adjusting material. , Preload is applied. Then, if the stretched material and the outer casing material after being moved by the hydraulic jack are fixed by temporary assembly bolts, then the hydraulic jack and the adjusting material can be taken out from the opening and diverted to another.

When it is necessary to further push in the adjusting member in the work of removing the temporary assembling bolt at the time of disassembling the mountain retaining support, the hydraulic jack and the adjusting member may be installed again.

According to the second aspect of the present invention, in addition to the above-mentioned action, the adjusting material can be selected from several kinds having a plate shape and different thicknesses. Can be easily obtained.

According to the present invention as set forth in claim 3, the hydraulic jack can be arranged in a stable state because it is put in and taken out from the opening together with the jack receiving base, and the jack receiving base is an attachment material when the adjusting material is arranged. Also useful as.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a vertical sectional side view showing an embodiment of a mountain clasp support material of the present invention, and FIG. 2 is a plan view of the same.

Reference numeral 3 in the drawing is a main member of the beam, and as an elastic member to be preliminarily joined to the main member, an outer box member 11 and an extension member 12 to be inserted into the outer box member 11 from the end are used. Become.

As shown in FIG. 3, the extension member 12 is of a box type, and an opening 13 is provided near one end for bolting a cover plate 15 that is connected to the main member 3 of the beam. The bolt insertion holes 14 such as elongated holes are provided at appropriate intervals near the other end.

One end of the outer box material 11 is an open end into which the elongate material 12 is inserted, and the other end is provided with a connecting portion 16 for stopping a cover plate 15 for connecting with the main beam 3 for beaming. Provided. The connecting portion 16 may be an auxiliary piece used in mountain retaining support work.

Further, an opening 17 along the length direction is formed on the upper surface of the outer box material 11 on the side where the connecting portion 16 is present, and the outer box material 11 of the outer box material 11 corresponds to the bolt insertion hole 14. Bolt insertion holes 18 are also provided in the side portions at appropriate intervals.

A U-shaped jack cradle as shown in FIG. 7 is to be accommodated in the outer box member 11 through the opening 17.
19, a hydraulic jack 20 arranged so as to lie inside the jack cradle 19, and an adjusting member as shown in FIGS.
21a, 21b and 21c.

The adjusting member 21a is of a plate-like type having the same size as the cross section of the extending member 12, and there are several kinds of adjusting members as shown in FIG. Further, the adjusting member 21b has an outer shape similar to that of the adjusting member 21a, but is a horizontal U-shaped member having an opening through which the rod of the hydraulic jack 20 passes, which is also the thickness thereof. There are several types. In addition, adjustment material
21c is constructed as a box type frame, and has the same cross-sectional area as the adjusting material 21a, but a large thickness. A handle 22 is provided for each of these.

As shown in FIGS. 9 and 10, there are several types of hydraulic jacks 20 having different propulsive forces.
In order to cope with this, a plurality of jack pedestals 19 having different internal spaces and different wall thicknesses are prepared.

The above is the description of the members. The outer box member 11 and the extension member 12 are inserted into the outer box member 11 from the ends, and these are joined to the main beam 3 by the cover plate 15 in advance on the ground. In addition, through the opening 17, in the gap between the extension member 12 end inside the outer box member 11, the jack receiving base 19 and the hydraulic jack housed therein.
20, an adjusting member 21b in front of the jack receiving base 19, and an adjusting member 21a or an adjusting member 21c in front of the adjusting member 21b are arranged.

After that, the main beam 3 of the beam is erected. The jack receiving base 19 and the hydraulic jacks 20 and the adjusting members 21a, 21b, 21c housed therein are arranged on the main beam 3 of the beam. You may go after erection.

When the hydraulic jack 20 is extended in this manner, the extension material 12 is pushed out of the outer box material 11 via the adjustment material adjustment material 21a and the adjustment material 21c and preloaded. As described above, since the rod of the hydraulic jack 20 passes through the adjusting member 21b, the adjusting member 21a and the adjusting member 21c are used.
Between the jack and the cradle 19 to prevent rattling. Further, the jack cradle 19 allows the hydraulic jack 20 to be stably installed, and the adjustment material 21a to
It also serves as a support when placing 21c.

After the extension member 12 has been moved by the hydraulic jack 20, the temporary assembly bolt 23 is inserted at the place where the bolt insertion holes 14 and 18 are aligned with the outer box member 11 and fixed there. The hydraulic jack 20, the jack pedestal 19 and the adjusting material can be taken out from the opening and used for other purposes.

[0026]

As described above, in the mountain retaining support material of the present invention, the member for adjusting the length can be incorporated mainly on the ground, and the work at high places can be eliminated to enhance the safety. Is.

Further, even when a hydraulic jack is used as the preload jack, the jack can be removed and diverted in the middle, so that the jack damage can be saved, and the jack can be adjusted in advance in stroke width by combining it with an adjusting material. It can be used as a large one and can introduce sufficient preload.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view showing an embodiment of a mountain retaining support material of the present invention.

FIG. 2 is a plan view showing an embodiment of a mountain retaining support material of the present invention.

FIG. 3 is a perspective view showing a configuration of an elastic member of the mountain clasp support member of the present invention.

FIG. 4 is a perspective view showing an example of an adjusting material.

FIG. 5 is a perspective view showing another example of the adjusting material.

FIG. 6 is a perspective view showing still another example of the adjusting material.

FIG. 7 is a perspective view of a jack pedestal.

8 is a cross-sectional view taken along the line BB of FIG.

9 is a cross-sectional view taken along the line AA of FIG.

10] AA of FIG. 1 in the case of another example of a jack cradle
It is a line sectional view.

FIG. 11 is an explanatory view showing a built-in state of the mountain retaining material of the present invention.

FIG. 12 is a perspective view showing a general example of mountain retaining support work.

FIG. 13 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

1 ... Mountain retaining wall 2 ... Raised main material 3 ... Girder main material 4 ... Adjusting material 5 ... Kirin jack 6 ... Firing main material 7 ... Firing piece 8 ... Corner piece 9 ... Jack reinforcing piece 10 ... Crossing part Piece 11 ... Outer box material 12 ... Stretching material 13 ... Opening 14 ... Bolt insertion hole 15 ... Cover plate 16 ... Coupling 17 ... Opening 18 ... Bolt insertion hole 19 ... Jack cradle 20 ... Hydraulic jack 21a-21c ... Adjusting material 22 … Handle 23… Temporary assembly bolt

Claims (3)

[Claims] 1. An expansion / contraction member that is preliminarily joined to the mountain retaining support main material on the ground. The expansion / contraction member is composed of an outer box material and an elongate material inserted into the outer box material from the end. An opening is formed, and a hydraulic jack that can be inserted and removed through this opening and an adjusting material are placed in the outer box material in the gap between the extension material end, and the extension material and the outer box material after moving by the hydraulic jack are temporarily A mountain clasp support material characterized by being fixed with assembled bolts. 2. The mountain retaining material according to claim 1, wherein the adjusting material is plate-shaped and is selected from several kinds having different thicknesses. 3. The mountain retaining support material according to claim 1, wherein the hydraulic jack is put in and taken out from the opening together with the U-shaped jack receiving base.