JPH0711649A - Earth retaining method and earth retaining box - Google Patents

Abstract

PURPOSE:To increase rapidity and safety of the work in addition to the easy work. CONSTITUTION:The ground is excavated to reach a required depth (about 1m more or less) to form a trench A and an earth-retaining box 10 assembled in advance is hung down by a construction machine like a back hoe or the like and installed therein (a). Sheet piles 14 are inserted at every required interval in every other sheet or the whole faces for instance (b). Next, the trench is excavated to make it deeper (c), and the earth-retaining box 10 and the sheet piles 14 are pushed in by a back hoe to settle gradually the whole structure in order to complete the earth-retaining work (d).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil retaining method and a soil retaining box, and more particularly to a technique which is excellent in quickness and safety of work by a simple method in burying gas pipes, water and sewer pipes and the like. .

[0002]

2. Description of the Related Art Conventionally, this type of earth retaining method is disclosed in Japanese Examined Patent Publication Sho 55.
The one disclosed in Japanese Patent No. 32128 has been proposed. In other words, this is an expandable / contractible type that has two earth retaining plates fitted with connecting members provided with water stop members slidingly contacting the both ends with their upper ends protruding, and sliding wheels provided at both ends. After standing up with a desired number of supporters in a divergent manner at predetermined intervals in advance, excavate the ground between the earth retaining plates and let the earth retaining plates sink by their own weight, and move downward depending on the earth pressure due to the sinking of the earth retaining plates. The supporter is operated to gradually reduce its length, and the upper and lower supporters are kept parallel while retaining the soil.

[0003]

However, in the earth retaining method, other existing buried objects (gas pipes, water / sewer pipes, etc.) are excavated in the digging section in the burial work for gas pipes, water / sewer pipes, etc. If it exists across, the tip of the retaining plate cannot hit the existing buried object and cannot be built below it.
There was a problem that it hindered the progress of the burial work.

Further, since this structure is constructed such that the earth retaining box is assembled by fitting the earth retaining plate to the connecting tool in the excavation groove, the assembling work in the excavation groove does not progress and the work speed is increased. Will be missing. Further, since the earth retaining plate forming the earth retaining wall is large by one plate, there is a drawback that a large space for storage is required.

Further, as shown in FIGS. 13 and 14, after excavating the ground to a desired depth, an earth retaining member is installed in the excavation groove A and the earth retaining method is gradually performed. It is being appreciated. That is, this is shown in FIG.
As shown in (c), the number of soil retaining members in the depth direction is increased according to the excavation depth to build up, and the sidewall portion in the excavation groove A excavating the ground over a desired depth. The sheet pile 1 is built in and the sheet pile 1 is fixed by the beam member 3 while raising the sheet pile 1 and pressing it with the material 2. As the sheet pile 1, a steel sheet pile that can withstand more earth pressure than a wooden sheet pile is used as the excavation groove depth is deeper.

However, in this device, after excavating to a predetermined depth, the worker enters the excavation groove A and installs the earth retaining member (the sheet pile 1, the uprising member 2, the cutting beam member 3, etc.). Therefore, there is a problem that the earth and sand may collapse during the installation work and the workers may be buried alive, and sufficient safety cannot be ensured. The present invention has been made in view of such conventional problems, and an object of the present invention is to provide an earth retaining method and an earth retaining box which are simple construction methods and are excellent in quickness and safety of work.

[0007]

Therefore, according to the first aspect of the present invention, a pair of vertical members are previously formed by bridging a horizontal member between a pair of vertical members in a trench excavated to a desired depth. After building a box for retaining soil by connecting the retaining wall frame with a connecting member at an interval approximately equal to the excavation groove width, insert sheet piles into the through holes formed in the lateral member of the retaining box. The soil retaining side wall is formed by inserting the soil at a desired interval, and then the excavation trench is further dug to gradually settle the whole box to retain the soil.

It is also possible to stack a plurality of the soil retaining boxes in accordance with the depth of the excavation groove and settle them to retain the soil. In the invention according to claim 3, the horizontal members are bridged between the pair of vertical members to form the earth retaining wall frame, and the pair of earth retaining wall frames are provided with a spacing substantially equal to the excavation groove width to connect the connecting members. To form a box, and through holes for inserting a plurality of sheet piles at desired intervals are formed in the lateral member.

It is also possible to stack a plurality of boxes in accordance with the depth of the excavation groove and form them freely for connection. Further, the retaining wall frame and the connecting member can be formed by freely disassembling them.

[0010]

According to this construction, the pre-assembled earth retaining box is installed in the excavation trench excavated to the desired depth, and the sheet piles are provided at the desired intervals in the plurality of through holes formed in the lateral member. Opening and inserting to form a retaining wall, and then gradually excavating the excavation ditch to settle the entire box and retain soil, for example, burying construction of gas pipes, water and sewer pipes, etc. it can.

As described above, the pre-assembled soil retaining box is directly built in the excavation trench excavated to the desired depth, and the sheet pile is inserted from above to form the soil retaining side wall. It is not necessary for an operator to enter the excavation trench to install a clasp member (such as a sheet pile, an upholstery material, a cutting beam material), and work safety can be ensured. In addition, since the soil retaining side wall is formed simply by constructing the soil retaining box and manually inserting a lightweight sheet pile, the assembly work in the excavation trench is unnecessary, and thus the promptness of the work can be secured. .

Since a plurality of sheet piles are independently inserted at desired intervals, other existing buried objects (gas pipes, water / sewer pipes, etc.) exist across the excavated cross section. Also, even if you insert it and leave the sheet pile whose tip hits the already buried object, you can insert the other sheet pile to form the retaining wall, which will not hinder the progress of the burial work. It is also possible to secure soil retaining at the upper position of the object.

When a plurality of earth retaining boxes are piled up and settled down to retain the soil, the soil can be retained according to the depth of the excavation groove in the burial work. Further, when the soil retaining wall frame and the connecting member are formed by disassembling and assembling freely, they do not become bulky, so that a sufficient storage space can be secured and transportation to the burying site becomes easy.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. First, referring to FIGS. 1 to 4, the structure of the earth retaining box used in the earth retaining method according to the present invention will be described. That is, the two horizontal members 12, 12 are bridged and connected between the pair of vertical members 11a, 11b to form the earth retaining wall frame 13. The vertical members 11a and 11b have an H-shaped cross section and are formed with an acute lower end to facilitate sinking into the excavation trench. Further, through holes 12 for inserting a plurality of sheet piles 14 at desired intervals are formed on the upper surfaces of the lateral members 12, 12.
a is provided.

Then, the pair of soil retaining wall frames 13 and 13 are connected with a connecting member 15 at an interval substantially equal to the excavation groove width to form the soil retaining box 10. Box 10 for soil retention
Is transported to the burying construction site in a disassembled state together with the connecting member 15 and the earth retaining wall frames 13, 13 which are composed of a cut beam jack whose expansion and contraction are adjustable, and is assembled there. When assembling this box, if the soil retaining wall frame 13 is installed on the stand 16 as shown in FIG. 5, it will not fall down, so that the assembly work can be performed safely.

The sheet pile 14 is formed in a strip shape as shown in FIG. 6, and a wooden sheet pile or a steel sheet pile is used according to the depth of the excavation groove. Next, the earth retaining method according to the present invention will be described with reference to FIG. First, the ground is excavated to a desired depth (about 1 m) to form an excavation groove A, and the earth retaining box 10 previously assembled is hung in the excavation groove A by a construction machine such as a backhoe. (See FIG. 7A).

Next, the sheet piles 14 are inserted into the through holes 12a at desired intervals, and are inserted into the through holes 12a formed in the lateral member 12 one by one (see FIG. 7B). In this case, depending on the soil quality, for example, in the case of brittle sandy soil, the sheet pile 14 is inserted over the entire surface for reinforcement. The sheet pile 14 is
When the depth of the excavation trench is shallow, wood sheet piles are used. Since it is lightweight, it is installed and removed manually. If the excavation groove is deep, steel sheet piles will be used, and they will be installed and removed by a backhoe, etc. as appropriate.

Next, the excavation groove A is further dug by a backhoe or the like (see FIG. 7C). After that, the soil retaining box 10 and the sheet pile 14 are pushed in by the backhoe to gradually settle the whole and soil retaining is completed (see FIG. 7 (d)). It should be noted that, as shown in FIG. 8, it is preferable to cover the upper end of the vertical member 11a with the pressure hood 17 in order to prevent damage when pushing it with the backhoe.

Finally, buried pipes such as a gas pipe and a water supply / sewer pipe are buried, and the earth retaining box 10 and the sheet pile 14 are pulled out by a backhoe while backfilling and compacting the earth and sand. As described above, since the soil retaining side wall is formed only by constructing the soil retaining box 10 and inserting the lightweight sheet pile 14 by human power, the assembling work in the excavation groove A becomes unnecessary, and the promptness of the work is ensured. You can

Further, the excavation groove A excavated to a desired depth
Since the pre-assembled soil retaining box 10 is directly installed therein to form the soil retaining side wall by inserting the sheet pile 14, the worker enters the excavation groove A to store the soil retaining member (sheet pile, abdomen upright). Material, wood beams, etc.)
Work safety can be secured. Next, another embodiment will be described with reference to FIGS. 9 and 10.

That is, this is one in which a plurality of soil retaining boxes are piled up and settled down to retain the soil, and the soil retaining boxes 10a and 10b are connected by bolts via the connection plate 18. According to this, soil retention can be performed by appropriately stacking a plurality of soil retention boxes 10a and 10b according to the depth of the excavation groove in the burial work.

Next, another embodiment will be described with reference to FIGS. 11 and 12. That is, this is an example of the case where another existing buried object (gas pipe, water / sewer pipe, etc.) exists across the excavation cross section, and the sedimentation of the earth retaining box 10 is caused by the lower end surface of the lateral member 12. Is stopped at the position where it abuts the existing buried object B, and the sheet pile 14a that hits the existing buried article B is left as it is, and another sheet pile 14 is inserted to form the soil retaining side wall. Even if there is the buried object B, it does not hinder the progress of the burial work, and the soil retaining at the upper position of the existing buried object B can be secured by the sheet pile 14a.

[0023]

As described above, according to the present invention,
A pre-assembled soil retaining box is directly built in the excavation trench that has been excavated to a desired depth, and a sheet pile is inserted from above to form the soil retaining side wall. It is not necessary to install the soil retaining member after entering, and it is possible to ensure work safety.

Further, since the soil retaining side wall is formed only by constructing the soil retaining box and manually inserting the lightweight sheet pile, the assembling work in the excavation trench becomes unnecessary, thereby ensuring the promptness of the work. be able to. In addition, since it is configured to insert a plurality of sheet piles at desired intervals independently,
Even when other existing buried objects (gas pipes, water / sewer pipes, etc.) exist across the excavation cross section, leave the sheet pile whose tip is the already buried object and leave the other sheet piles open. The earth retaining wall can be formed by inserting it, so that it does not hinder the progress of the burial work, and it is possible to secure the earth retaining at the upper position of the existing buried object.

Further, when a plurality of earth retaining boxes are piled up and settled down for earth retaining, the earth retaining can be performed according to the depth of the excavation groove of the burial work. In addition, when the earth retaining wall frame and the connecting member are formed by being freely disassembled and formed, a sufficient storage space can be secured and transportation to the burial site becomes easy.

[Brief description of drawings]

FIG. 1 is a perspective view showing an earth retaining box according to the present invention.

FIG. 2 is a front view showing a soil retaining box according to the present invention.

FIG. 3 is a side view of FIG.

FIG. 4 is a plan view of FIG.

FIG. 5 is a partial perspective view showing a state where the soil retaining box according to the present invention is assembled using a stand.

FIG. 6 is a perspective view showing a sheet pile used in the earth retaining method according to the present invention.

FIG. 7 is a process drawing showing a soil retaining method according to the present invention.

FIG. 8 is a partial perspective view showing a state in which the upper end of the vertical member is covered with the pressure hood and the soil retaining box is pushed in.

FIG. 9 is a sectional view showing another embodiment of the present invention.

FIG. 10 is a side sectional view of FIG. 9.

FIG. 11 is a sectional view showing another embodiment of the present invention.

FIG. 12 is a side sectional view of FIG. 11.

FIG. 13 is a plan view showing a conventional earth retaining method.

FIG. 14 is a side sectional view showing a conventional earth retaining method.

[Explanation of symbols]

 10 Soil retaining box 11a, b Vertical member 12 Horizontal member 12a Through hole 13 Soil retaining wall frame 14 Sheet pile 15 Connecting member 16 Stand 17 Pressure hood 18 Connection plate

Claims (5)

[Claims] 1. A pair of earth retaining wall frames formed by bridging a horizontal member between a pair of vertical members in advance in a trench excavated to a desired depth with a gap substantially equal to the trench width being connected. After building the soil retaining box that is connected by members, insert sheet piles at desired intervals into a plurality of through holes formed in the transverse member of the soil retaining box to form the soil retaining side wall, and then perform the excavation. The earth retaining method is characterized in that the trench is further dug to gradually settle the whole box and retain the soil. 2. The earth retaining method according to claim 1, wherein a plurality of earth retaining boxes are piled up in accordance with the depth of the excavation groove and settled to retain the soil. 3. A box is formed by bridging a lateral member between a pair of vertical members to form a retaining wall frame, and connecting the pair of retaining wall frames with a connecting member at an interval substantially equal to the excavation groove width. A box for retaining soil, characterized by being formed with through holes for inserting a plurality of sheet piles into the transverse member at desired intervals. 4. The box for retaining soil according to claim 3, wherein a plurality of boxes are stacked in accordance with the depth of the excavation groove to be freely connected. 5. The earth retaining box according to claim 3, wherein the earth retaining wall frame and the connecting member are formed by freely disassembling them.