JP2015117518A - Temporary earth retaining device and construction method for earth retaining structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To construct an earth retaining structure without driving a soldier pile.SOLUTION: An earth retaining device includes a decking material that is laid on existing ground to serve as a bottom plate surface, a support material that is vertically erected on the decking material, and a resistance material on the decking material, which is arranged in a position away from the support material in an opposed manner. An hole for an anchor material for fixing the temporary earth retaining device to a ground surface is provided in the decking material. The resistance material comprises a member that is arranged in such a direction as to be perpendicular to the erection direction of the support material and that has a surface for receiving earth pressure.

Description

The present invention relates to an earth retaining device that can be applied temporarily and a method for constructing an earth retaining structure using the earth retaining device.

When a temporary construction road is constructed by embankment of earth and sand, a slope is created on the edge of the embankment.
In particular, when the embankment edge side cannot be a slope, the embankment edge side needs to be vertical. Therefore, earth retaining to prevent collapse of the vertical plane must be used. As a conventional method, H steel called a parent pile is driven into the ground, and a vertical sheet is formed by crossing a horizontal sheet pile between parent piles (H steel) driven at intervals. There is a method of rolling out earth and sand and rolling them to form earth retaining.

JP 7-127066

Patent Document 1 uses a plastic surface reinforcing material, embankments while placing a sandbag, installs anchor bolts in the stacked embankment layer, and fixes a rigid panel to the anchor bolts. The method is shown. When construction is performed in such a process, the embankment layer is rolled out, and after the embankment layer has increased in thickness to some extent, anchor bolts are installed and a rigid panel is attached. When a rigid panel is attached and fixed, a gap with a sandbag is generated, and therefore a filling material must be input. In addition, when anchor bolts are tightened, the bolt tightening operation is performed in an area where no embankment is performed, and thus a work scaffold is required in an area where embankment is not performed. Furthermore, when a general earth retaining method is adopted, there are constructions that cannot be piled on the planned ground where the parent pile is used. For example, because piles cannot be placed on river dikes, it is impossible to adopt the earth retaining method using parent piles.

The invention of the temporary earth retaining device, which is the first invention created to solve such problems, was laid on the current ground to be the bottom plate surface, and was erected vertically on the floor plate material It consists of a strut material and a resistance material fixed on a floor plate material arranged at a position facing away from the strut material, and the floor plate material is provided with a hole of an anchor material that fixes the temporary earth retaining device to the ground, The resistance material is a temporary earthing device characterized in that the resistance material is arranged in a direction perpendicular to the standing direction of the support material and is made of a member having a surface that receives earth pressure.

According to such a earth retaining device, in order to construct the earth retaining structure, the temporary earth retaining device is transported and laid in a row on the current ground so that no slope is provided. It can be performed. Moreover, the earth retaining structure can be easily constructed without placing a pile in the ground.

In addition, the method of constructing the earth retaining structure using the earth retaining device, which is the second invention that has been invented, is a floor board material that is laid on the current ground and becomes a bottom board surface, and a vertical standing on the floor board material. And a resistance material on the floor plate material arranged at a position facing away from the column material, and the floor plate material is provided with a hole of an anchor material for fixing the temporary earth retaining device to the ground. Is a step of manufacturing a temporary earth retaining device comprising a member arranged in a direction perpendicular to the standing direction of the support material and having a surface to receive earth pressure, and the earth retaining device is spaced from the ground. A method for constructing a retaining structure, comprising: a step of laying in a row; a step of attaching a lateral sheet pile to a support material of a retaining device; and a step of unwinding and paving the roadbed material. .

In this way, since the temporarily built earth retaining device is simply laid out before the embankment construction work, the earth retaining structure can be easily constructed as compared with the method of placing a pile in the ground.

In addition, construction can be carried out without modifying the existing ground and without damaging it.

The earth retaining device starts to slide during operation on the road by the resistance material and the anchor material that complements the resistance material, and the earth retaining does not collapse.

The earth pressure due to embankment can be easily dealt with by adjusting the interval of the earth retaining device.

When this construction is completed, the embankment material and the temporary earth retaining device can be easily removed, and can be reused after collection.

Since the amount of work at the site is reduced, the workability of the construction can be improved and the construction period can be shortened.

(A) It is a perspective view of the earth retaining apparatus addressed to a sheet pile. (B) It is a side view of the earth retaining apparatus. (C) It is a top view of the earth retaining device. (A) It is a top view of the embankment vicinity using the earth retaining apparatus. (B) It is AA sectional drawing. (C) It is sectional drawing when it is paved. It is sectional drawing of a earth retaining structure.

The structure of the earth retaining device 1 according to the embodiment of the present invention will be described. As shown in FIG. 1A, the floor board material 11 is a steel sheet having a rectangular plan view. For example, as shown in FIGS. 1B and 1C, the width is 300 mm, the length is 900 mm, and the thickness is 9 mm.
The column material 12 erected on the floor plate material is H-shaped steel, and the cross-sectional shape of the H steel is 100 mm in width and height, for example, as shown in FIGS. C) 700 mm.

The column material 12 is vertically installed on the floor plate material 11 so that the center of the column material 12 coincides with a line passing through the center of the width dimension (300 mm) of the floor plate material 11, and is fixed by welding. The direction of the flange surface 12a of the H-shaped steel that is the support material 12 is erected on the floor plate material 11 so that the direction in which the earth retaining devices are arranged in a line is the same (parallel) as the direction B shown in FIG. Is done. Thus, the horizontal sheet pile 13 can be addressed to the flange surface 12a by standing the support | pillar material 12 upright.

The resistance material 14 shown in FIG. 1 (a) is a section steel having an L-shaped cross section, and is an equilateral angle steel as shown in FIGS. 1 (b) and 1 (c). For example, the cross-sectional dimensions are 90 mm × 90 mm, length (direction B) 280 mm, and thickness 10 mm.
Further, the resistance material 14 is welded to a position on the floor plate facing away from the support material 12 so that the longitudinal direction B of the resistance material 14 is perpendicular to the standing direction C (vertical direction) of the support material 12. It is fixed. As shown in FIG. 1B, the flange surface 12 a of the support member 12 is separated from the flange surface 14 a of the equilateral angle steel 14 that is the resistance material 14. Preferably it is 810 mm.
Further, as shown in FIG. 1B, the equilateral angle steel 14 is fixed so that one flange surface 14 a of the equilateral angle steel 14 is perpendicular to the plane of the floor plate material 11.

As shown in FIG. 1 (c), a hole 16 through which an anchor material 15 for fixing the earth retaining device 1 to the ground is provided in the vicinity of the fixed resistance material 14. The holes 16 are formed in two places as holes 16 that can be used by inserting a round bar having a diameter of 18 mm into the ground, for example.

As shown in FIGS. 1 (b) and 1 (c), the support member 12 and the resistance member 14 have a suspension hole 17 for lifting with a crane (lifter) used when the earth retaining device 1 is laid on the ground. Is provided. A suspension jig (not shown) can be taken in the suspension hole 17.

This earth retaining device is manufactured in a factory or the like before being used in construction.

This embodiment of the method of constructing the earth retaining structure using the earth retaining device 1 according to the embodiment of the present invention is shown. FIGS. 2A, 2B, and 2C show an example in which the earth retaining device 1 is used to construct the temporary road 20. FIG.

As shown in FIG. 2 (a), the earth retaining device 1 manufactured in advance in the factory is arranged in a line at intervals along the shoulder portion 5 at the end of the existing road 4 (slope) on the embankment 3. Lay it down. A block retaining wall 6 is provided on the opposite side of the road 4 from the shoulder portion 5 shown in FIG. In the laying / laying work, the earth retaining device 1 can be installed by using the suspension holes 17 in the support material 12 and the resistance material 14 and lifting it with a crane.

The interval between the earth retaining devices 1 is determined by the thickness of the roadbed material 21 of the temporary road 20 to be newly installed. Preferably it is 1m-1.5m.

The H steel flange surface 12a of the support material 12 is made to coincide (parallel) with the direction B in which the support material 12 is laid.

As shown in FIG. 2 (b), after laying, the round steel bar of the anchor material 15 that fixes the earth retaining device 1 is inserted into the hole 16 in the floor plate material 11, and the earth retaining device 1 is fixed to the road shoulder 5 portion. .

Next, from the state shown in FIG. 2 (b), as shown in FIG. 1 (a), the horizontal sheet pile 13 is attached to the H steel flange surface 12a of the support member 12 to make a retaining surface. The lateral sheet piles 13 are attached to the upper, lower, left and right sides without any gaps so that the roadbed material 21 does not spill out from the connecting portion of the lateral sheet piles 13. Thereafter, as shown in FIG. 2 (c), the roadbed material 21 is unwound, rolled, and paved as a temporary road 20.

FIG. 3 is a sectional view of the finished earth retaining structure 30. As shown in FIG. 3, the pavement surface 22 is at a position lower than the height of the lateral sheet pile 13. The resistance material 14 is integrated with a sufficiently compacted roadbed material 21. Therefore, the resistance material 14 does not become a resistance against the earth pressure due to the weight of the passing vehicle and does not slide to the slope side. When used as a temporary road 20, for the safety of traffic, a single pipe is attached to the upper part of the column material 12 in a state of protruding from the pavement surface 22, and a passage handrail is provided. Furthermore, it protects using a cushioning material for a handrail as a protective material. The earth retaining structure 10 using the earth retaining device can be constructed by such a procedure.

In the above description, the floorboard material 11 has a rectangular shape, but is not limited to a shape as long as it has a function as a floorboard. Moreover, although the support | pillar material 12 is demonstrated with H steel, I-type steel which has the flange surface 12a to which the cross sheet pile 13 addresses, or T-type steel may be sufficient. Further, although the resistance material 14 is described as equilateral angle steel, a thick plate having the function of the flange surface 14 a may be directly fixed to the floor plate material 11 by welding. In addition, the space | interval and roadbed thickness of a earth retaining apparatus are determined by the vehicle dimension and weight to pass.

1 Earth retaining device 3 Embankment 4 Existing road (slope)
5 Road shoulder 6 Retaining wall 11 Base plate material 12 Prop material (H steel)
12a Flange surface 13 Horizontal sheet pile 14 Resistance material (equal edge angle steel)
14a Flange surface 15 Anchor material 16 Hole 17 Suspension hole 20 Temporary road 21 Roadbed material 22 Pavement surface 30 Earth retaining structure B Direction in which earth retaining devices are arranged, resistance material longitudinal direction C Standing material standing direction

Claims (2)

A temporary earth retaining device used for embankment on the existing ground,
The earth retaining device is laid on the current ground and becomes the bottom plate surface, the column material standing vertically on the floor plate material, and the resistance on the floor plate material arranged away from the column material The floor plate material is provided with a hole for anchor material that fixes the temporary earth retaining device to the ground, and the resistance material is arranged in a direction perpendicular to the standing direction of the column material and earth pressure A temporary earth retaining device comprising: a member having a surface for receiving. When constructing the embankment structure, a step of manufacturing the temporary earth retaining device according to claim 1, an operation step of arranging the earth retaining devices on the ground at intervals, and a horizontal sheet pile of the earth retaining device A method for constructing an earth retaining structure comprising a work process directed to a support material and a paving process for unwinding and paving the roadbed material.

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