JPS6187023A - Construction of banking structure - Google Patents

Abstract

PURPOSE:To obtain a durable banking structure by using a ground reinforcement material to be laid in the back side banking of a concrete panel erected, which is formed of a flexible, water-impervious outer shell, a tension member inserted into the outer shell, and a filler to be packed into the shell. CONSTITUTION:A flexible tension member 2 is inserted into an outer shell 1 made of a water-impervious flexible plastic tube, and a hardener 3, e.g., cement milk, etc., is packed into the shell 1 to form a ground reinforcement material A of a straight form or a meshed or jungle-jim form. The reinforcement material A is laid on the back of concrete panels erected on the ground, and banking is formed and compacted to integrate the material A with the ground. Since the outer shell of the material A is impervious to water, no corrosion by ground water occurs in the tension member 2, and the durable banking structure can thus be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a method for constructing an embankment structure, and particularly to a method for constructing an embankment structure that is easy to construct and highly durable.

[Prior art and its problems]

In recent years, upright vertical earth retaining structures (earth retaining walls) have been in demand in the construction industry from a socio-economic standpoint in order to make effective use of land.

Conventionally, this type of earth retaining structure has been constructed by installing multiple pillars upright on the ground at intervals, and constructing a wall by inserting concrete panels between the adjacent pillars. Embankment structures were constructed by laying reinforcing steel tensile materials, filling the earth, and rolling compaction to integrate the soil layer and the tensile materials.0However, in this type of embankment structure, the tensile materials were It corrodes and has poor permanence.As a construction method to improve this drawback, a flexible outer shell, a flexible tensile material inserted into this outer shell, and a ground surface inside the outer shell are used. Flexible soil reinforcement materials equipped with injection pipes for injecting consolidation material are laid on the ground at predetermined intervals, embanked, and compacted to form a soil layer. (A construction method is known in which the earth is turned back to form an embankment structure. (Invention of Japanese Patent Publication No. 18494/1983) 0 This construction method can construct a highly permanent embankment structure, but the structure Since consolidation material is injected into the outer shell after construction, in the case of structures with high wall heights, the tensile material may fall out of the outer shell due to earth pressure by the time the final wall height is reached. [Objective of the Invention] Therefore, the object of the present invention is to provide a structure that is easy to construct and requires a lot of time and effort. It is an object of the present invention to provide a method for constructing an embankment + 14 structure that is highly durable and that improves the drawbacks of the above-mentioned known techniques. A method for constructing an embankment structure in which a soil reinforcing material is laid down, embanked, and compacted to integrate the soil layer and the ground reinforcing material, wherein the ground reinforcing material has an impermeable and flexible outer shell. , consisting of a flexible tensile material inserted into the outer shell, and a consolidating material filled and consolidated into the outer shell to integrate the outer shell and the tensile material. It is characterized by

[Embodiments of the invention]

FIG. 1 shows a cross-sectional view of a specific example of the soil reinforcement material used in the present invention. In FIG. 1, l is a water-impermeable and flexible outer shell, which is made of a plastic tube such as a polyethylene tube. A flexible tensile material 2 such as reinforcing steel is inserted into the outer shell 1, and a solidifying material 3 such as cement milk, foamed cement, resin-mixed cement, or fiber-mixed cement is filled and solidified. , the outer shell 1 and the tensile material 2 are integrated by the consolidation material 3 to obtain the soil reinforcement material A according to the present invention. This type of soil reinforcement material A is manufactured under complete quality control in a factory. Since it is manufactured in Japan, you can expect a certain level of quality.

The above-mentioned soil reinforcing material A may have a net shape as shown in FIG. 2, or may be assembled into a jungle gym shape (not shown). In Fig. 2, 1 is the outer shell, 2 is the tensile material, and 3 is the consolidation material. This construction method will be specifically described in detail below, in which an embankment structure is constructed by integrating the soil layer and the ground reinforcement material A.

First, as shown in FIG. 3, a plurality of columns 4 are installed upright on the ground at arbitrary intervals.

Next, a concrete panel 6 is fitted between the mutually adjacent columns 4, 4 to form a wall surface 7, and a back surface 8 of this wall surface 7 is formed.
The ground reinforcing material A is laid on the ground 5 on the side. During this installation, the ground reinforcing material A is connected to the back of the pillar 4 or the concrete panel 6. This connection is made by fixing the tensile material 2 to the pillar 4 or the concrete panel 6 with nuts 9 as shown in the third figure. Alternatively, as shown in FIG. 4, a rod-shaped retaining piece 10 is fixed to the tip of the soil reinforcing material A, and the retaining piece 1 is fixed to the concrete panel 6 (or the pillar 4).
Drill a hole 11 that matches 0, and insert a gold piece 1 into this hole 11.
After inserting 0, the ground reinforcement material A may be rotated in the direction of the arrow.
It is possible to freely slide up and down by the height and width of , and therefore, even if the ground reinforcement material A is displaced downward due to compaction as described later, stress concentration does not occur in the connecting part and it can adapt to the compression of the embankment. 0 Next, embankment is placed on the laid ground reinforcement material A, and the soil layer and soil reinforcement material A are integrated by rolling, and by repeating this process, an embankment structure B is created as shown in Figure 5. The embankment structure B to be constructed may be constructed of blocks as shown in FIG. 5(a), and as shown in FIG. 5(b).
It may be constructed by overlapping two blocks as shown in , and in the construction method of the present invention described above,
As shown in Figure 6, even if the soil reinforcement material A is partially destroyed due to displacement of the embankment soil layer due to compaction, unevenness of the ground, etc. The broken part of the binder 3 is indicated by X0), and the outer shell 1a of this broken part X is subjected to tension to suppress the deformation of the binder 3.
The solidifying material 3 inside will not be destroyed over its entire length.

Rather, the reinforcing material A adapts to the displacement of the embankment due to the occurrence of partial failure of the consolidation material 3, and furthermore, both the tensile material 2 and the outer shell 1 exhibit flexibility. It is easy for these to adapt to the displacement, and therefore, since the reinforcing material A is a reinforcing material made of a rigid member, it can exhibit the effect of a flexible reinforcing material.

In addition, in the soil reinforcement material A according to the present invention, if joint materials 12 made of plastic, rubber, etc. are installed in the outer shell 1 at predetermined intervals as shown in FIG.
Since the joint material 12 adapts to the displacement of the embankment soil layer described above, destruction of the consolidation material 3 can be prevented. 13 is a hole through which the consolidation material 3 passes. Further, although not shown, the same effect as using the joint material 12 described above can be obtained even if spaces or cracks are formed in the consolidation material 3 instead of the joint material described above.

In addition, since the outer shell 1 is water-impermeable, groundwater will not infiltrate into the reinforcing material A, and therefore the tensile material 2
There is no fear that the embankment will be corroded by groundwater, and therefore, the present invention makes it possible to construct an embankment structure that maintains its permanence.

Furthermore, in the method of the present invention, the consolidation material 3 is completely hardened at the time the reinforcing material A is laid in the embankment, and the outer shell 1 and the tensile material 2 are completely integrated. The tensile strength of the tensile material 2 is imparted to the soil layer, so there is no need to lay a sort or connect anchor plates as in the known technology, and construction is easy even for a sufficiently large embankment structure.

In addition, in the above-mentioned present invention, when laying the soil reinforcement material A on the ground, a layer of cement, lime, or a mixture of these and soil is formed around the reinforcement material A, and then earth and sand are applied. By rolling it out and compacting it, you can build an even stronger embankment structure. The reason for this is that the reinforcing material A and the soil layer are not simply integrated by frictional force, but are integrated by a chemical consolidation effect, and the pull-out resistance is greatly increased.

〔Effect of the invention〕

As described above, the present invention uses a special ground reinforcing material in place of conventional tensile material when constructing an embankment structure, so it has excellent effects such as easy construction and high durability. is 0

[Brief explanation of drawings]

FIG. 1 shows a cross-sectional view of one specific example of the soil reinforcement material used in the present invention, and FIG. 2 shows a plan view of another soil reinforcement material,
FIG. 3 shows a plan view of a state in which the soil reinforcement material according to the present invention is installed, FIG. 4 shows a perspective view showing the state in which the soil reinforcement material according to the present invention is connected to a wall surface, and FIG. A model diagram showing the construction state of the embankment structure according to the present invention is shown, FIG. 6 is an explanatory diagram of the effect of the soil reinforcement material according to the present invention, and FIG. 7 is a diagram showing the effect of the soil reinforcement material according to the present invention. O showing a cross-sectional view of a specific example 1... Outer shell, 2... Tensile material, 3... Consolidation material, 4...
... Support column, 5 ... Ground, 6 ... Concrete panel, 7 ... Wall surface, 8 ... Back, A ... Ground reinforcement material,
B... Embankment structure patent applicant Reinforced Earth Engineering Co., Ltd.

Claims (1)

[Claims] A method for constructing an embankment structure in which a soil reinforcing material is laid on the ground, embanked, and compacted to integrate the soil layer and the ground reinforcing material, wherein the ground reinforcing material is impermeable and non-flexible. It is composed of a shell, a flexible tensile material inserted into the outer shell, and a consolidating material filled and consolidated into the outer shell to integrate the outer shell and the tensile material. A method of constructing an embankment structure.