JPH086325B2 - How to build a reinforced soil retaining wall - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for constructing a reinforced soil retaining wall, and in particular, construction by using a wall member having a height corresponding to almost the entire height of the reinforced soil retaining wall. It relates to a method for constructing a reinforced soil retaining wall that simplifies and reduces wall displacement.

[Prior art and its problems]

Structures such as soil retaining structures that are susceptible to vibration and shock from traffic, deterioration due to ultraviolet rays, and corrosion due to rainwater are less susceptible to deterioration such as concrete, reinforced concrete, PS concrete, etc., and have mechanical strength. It is desirable to use a rigid material of large size. From such a point of view, a reinforced earth construction method has been developed in which concrete panels are stacked to form a wall surface, and a backing material is laid and a reinforcing material is laid on the wall for rolling.

In such a reinforced earth construction method, it is necessary to roll the embankment to integrate the reinforcement and the embankment, but at this time, the compaction layer compresses, so relative displacement occurs at the connection part between the concrete panel and the reinforcement. Therefore, the connecting portion is likely to be broken due to stress concentration.

In order to prevent this kind of defect, it has been attempted to use small concrete panels in the past, stack them to form a wall surface and sandwich a compressible cork plate between the concrete panels, thereby accommodating the compression of the embankment. It was being done.

However, this type of construction method requires a compressible cork plate approximately every 1.5 m in order to adapt to the compression of the embankment, and therefore requires a large number of concrete panels with a width of approximately 1.5 m. It requires a crane to assemble concrete panels until the construction of almost all steps of the retaining wall is completed, and the construction is very troublesome. Further, in this construction method, the displacement of the wall surface becomes extremely large in response to the earth pressure, which causes aesthetic problems or strength problems such as collapse and pull-out.

[Object of the Invention]

The object of the present invention is to remedy the above-mentioned drawbacks existing in the prior art, which simplifies the construction, adapts to the compression of the embankment, and makes it difficult for wall displacement to occur, thus strengthening the reinforcement. It is to provide a method of constructing a retaining wall.

[Main points of the invention]

In order to achieve the above-mentioned object, according to the present invention, it has a height corresponding to almost the entire height of the retaining wall, the column fixing member on the upper part of the front surface side, and the slide type reinforcing member connecting member on the rear surface side. Installed upright on the ground wall member consisting of each mounted concrete panel, prior to installing the reinforcing material to the slide-type reinforcing material connecting member to form the embankment layer, on the surface side of the wall surface member A pillar is applied to hold the wall member upright, and this pillar has one end connected to a pillar fixing member mounted on the upper surface side of the wall member and the other end fixed to a fulcrum member on the ground. This is applied to the front surface side of the wall surface member.

Example of Invention

Hereinafter, a detailed description will be given with reference to the accompanying drawings of the present invention.

FIG. 1 is a sectional view of a wall surface structure according to the present invention, FIG. 2 is a perspective view thereof, and FIGS. 3 (a), (b), and (c) show a connecting state of a connecting member and a reinforcing member, respectively. FIG.

Reference numeral 1 is a wall member, which is a prefabricated concrete panel based on a rectangle having a height corresponding to almost the entire height of the retaining wall, for example, a height of 2 m or more, usually 3 to 15 m, and having a width. It is approximately 1 m or more. When the wall surface member 1 is installed on the ground 2, first, the ground 2 is excavated, then the foundation 3 is formed on the excavated surface, and the foundation 3 is installed upright on the foundation 3 by a crane over a desired section. On this occasion,
A pillar 6 for vertically supporting the wall member 1 is applied to the front surface 4 of the wall member 1 at least until the wall member 1 is stably installed. The pillar 6 is, for example, a pillar fixing member 5 mounted on the upper surface 4 of the wall member 1.
It is applied to the front surface side 4 of the wall surface member 1 by connecting one end to the fulcrum member 7 and fixing the other end to the fulcrum member 7 on the ground 2.
On the back side 8 (or the embankment side 8) of the wall surface member 1 described above, a plurality of slide-type reinforcing material connecting members 9 are attached from the lower side to the upper side of the back side 8 at intervals of 1.5 m or less. The reinforcing member 10 is slidably connected vertically.

For example, as shown in FIG. 3 (a), the connecting member 9 fixes a pair of fixing fittings 11 and 12 at upper and lower symmetrical positions on the rear side 8 respectively, and further connects a connecting rod 13 between the upper and lower fixing fittings 11 and 12. It is configured by fixing. In this case, a reinforcing member is formed by forming a hole at one end of the reinforcing member 10 and inserting the connecting rod 13 into the hole.
10 is connected to the connecting member 9, so that the reinforcing member 10 can freely slide vertically between the metal fittings 11 and 12 along the connecting rod 13. Reference numerals 14 and 14 'are nuts for fixing the connecting rod 13 between the fixing fittings 11 and 12.

Further, as shown in FIG. 3 (b), the connecting member 9 may be formed by elongating a long elongated hole 15 at an arbitrary position of the wall surface member 1. In this case, the reinforcing material 10 is The tip of the reinforcing material 10 (anchor bar) is passed through the hole 15 and the nut 16 is fitted to be connected to the connecting member 9.
You can freely slide up and down along.

Furthermore, as shown in FIG. 3 (c), the connecting member 9 is provided with a "U" -shaped or semi-arcuate fixing metal fitting 17 at an arbitrary position on the back side 8 of the wall surface member 1 and a space 18 laterally. So that there are a plurality of such metal fittings 17 and space 18
May be fixed at positions facing each other, and further, the connecting rod 19 may be configured to be suspended in the space 18 of the fixing metal fittings 17 adjacent to each other. In this case, the reinforcing member 10 uses a net-like sheet, which is a connecting rod. The reinforcing member 10 can be freely slid up and down by the width of the space 18 so that the reinforcing member 10 is connected by being wound around the space 19.

In the construction, the wall surface A for a reinforced soil retaining wall according to the present invention configured as described above is provided in a predetermined section in the extending direction of the retaining wall prior to the embankment reinforcing process such as spreading of the embankment, compaction, and installation of a reinforcing material. First, the reinforcing member 10 is connected to the connecting member 9 from the lower side after the wall surface is continuously erected, and the embankment is spread on the connecting member 9 and rolled, and the operation is repeated until the upper portion is reached. Reinforcing material 10 is connected, and the embankment is compacted to the upper side. As a result, wall member 1
The embankment compaction layer 20 is formed on the back side 8 of the to construct a reinforced soil retaining wall. The pillars 6 are removed when the wall surface member 1 can be stably erected upright after the embankment rolling of the rear surface sand.

In the above-described present invention, since the reinforcing member 10 is slidably connected to the connecting member 9 in the vertical direction, the reinforcing member 10 adapts to the compression of the embankment and stress concentration does not act on the connecting portion. Is continuous for a specified length in the extension direction of the retaining wall, and the height corresponding to almost the entire height of the retaining wall stands upright before embankment reinforcement, so use the crane only when installing the wall member 1 at the initial stage of construction. It is sufficient that the wall surface is not assembled after the embankment reinforcement process, and therefore the construction is simplified, and there is no fear that the wall surface member 1 is displaced by earth pressure.

Further, since the wall member 1 is supported by the pillars 6 and is held upright and stable from the initial stage of construction at least until it is stably installed, a series of laying of the reinforcing material 10 and rolling of embankment is performed. During repeated construction, the wall surface is stably held upright and there is no risk of displacement. Therefore, the present invention also simplifies construction and shortens the construction period. A reinforced soil retaining wall with almost no displacement is possible.

〔The invention's effect〕

As described above, the present invention uses a wall member having a height substantially equivalent to the entire height of the retaining wall, and the reinforcement member is slidable up and down on the back surface of the wall member after standing upright in advance for a predetermined section in advance. Since the embankment is carried out while being connected to, the construction is simplified, the compression of the embankment is adapted, the displacement of the wall surface is unlikely to occur, and the strength is excellent.

[Brief description of drawings]

FIG. 1 is a sectional view of a specific example of a wall structure according to the present invention,
FIG. 2 is a perspective view thereof, and FIGS. 3 (a), (b), and (c) are cross-sectional views showing a connecting mechanism of a connecting member and a reinforcing member according to the present invention, respectively. 1 ... Wall member, 2 ... Ground, 4 ... Front side, 6 ... Post, 8 ... Back side, 9 ... Connecting member, 10 ... Reinforcing material, 20 ... Embankment rolling layer, A ... … Wall surface for reinforced soil retaining wall

Claims (1)

[Claims] 1. A wall surface made of a concrete panel having a height corresponding to almost the entire height of a retaining wall, and a pillar fixing member mounted on an upper portion of the front surface side and a slide type reinforcing member connecting member mounted on a rear surface side of the retaining wall. The member is installed upright on the ground, and before the reinforcing material is installed on the slide type reinforcing material connecting member to form the embankment layer, a pillar is applied to the surface side of the wall surface member to attach the wall member. Is held upright, this strut is connected to the strut fixing member mounted on the upper part of the surface of the wall member at one end, and the other end is fixed to a fulcrum member on the ground to contact the surface of the wall member. A method for constructing a reinforced soil retaining wall characterized by being removed.