JPH11286928A - Drain material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the function by filling sand or crushed stones in a bag of mesh structure consisting of biodegradable plastics, and forming a packed drain material. SOLUTION: A plurality of packs A consisting of a bag 1 of mesh structure consisting of biodegradable plastics and sand or crushed stones filled therein are vertically stacked and buried in a water bearing ground 8 to form a vertical drain layer in the ground 8. The water in the ground 8 is sucked by the pack A to consolidate and strengthen the ground 8. Further, since the bag 1 is degraded in the ground 8, it never obstructs the excavation of the ground 8 later, and the environmental contamination can be prevented. Instead of this, a paper-like plate having a plurality of water holes provided at prescribed intervals is formed of biodegradable plastics, and it is vertically continuously buried, for example, in banking, so that the longitudinal direction of the water holes corresponds to the vertical direction of the banking to form a drain layer. According to this, the ground can be early strengthened, the trafficability can be enhanced, and the collapse of a slope or the like can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a drain material buried underground.

[0002]

2. Description of the Related Art Drain materials currently used are basically buried underground and left.

[0003]

Since the drainage material is left in the ground, it often hinders the construction of a shield or an underground structure after the ground is compacted.

[0004]

[Object of the present invention] The present invention has been made to solve the above-mentioned problems. After embedding in the ground, water is discharged in the short term to consolidate the ground, and in the long term, the ground is decomposed. It is another object of the present invention to provide a drainage material which is not hindered when excavating the ground later and which is environmentally friendly and leaves nothing in the ground.

[0005]

In order to achieve the above object, the drain material of the present invention comprises: (1) a biodegradable plastic formed into a mesh-shaped bag and filled with sand or crushed stone; (2) In addition, the biodegradable plastic is formed in a plate-like body, and the plate-like body is provided with a series of water holes at predetermined intervals. (3) The plate-like body in which biodegradable plastic is formed in a plate-like body and water holes are arranged in series at predetermined intervals; and a plate-like body having a network structure of biodegradable plastic. And a mat formed in a sandwich structure.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. <B> Characteristics of biodegradable plastics Biodegradable plastics have a certain degree of tensile strength,
It has the property of absorbing water and decomposing. In addition, it has a water permeation function itself. Using this as a material, bags and each plate-like body 2, 3,
4 is formed.

<B> Embodiment of drain material A [1]
(FIG. 1) As the drain material A, a biodegradable plastic is formed in a bag 1 having a mesh structure having appropriate softness. A plurality of packs A in which the bags 1 are filled with sand 7 or crushed stones are vertically stacked and buried in the wet ground 8 to form a vertical drainage layer in the ground 8. Then, the water in the ground 8 is sucked up by the water permeation / drainage function of the bagging pack A, and is compacted and strengthened. Eventually, the biodegradable plastic bag 1 is decomposed in the ground 8, so that it does not hinder the later excavation of the ground 8 to construct a structure and does not pollute the environment. The illustrated bag 1 is a short cylinder having a diameter of 10 cm to 30 cm, but a bag with a folded bag may be used.

<C> Embodiment of Drain Materials B and C [2] (FIGS. 2 and 3) The drain materials B and C are plate-like having biodegradable plastic water-permeable functions 5 and 6. Formed into bodies 2 and 3 (paper-like),
It has a characteristic that has both moderate flexibility and rigidity. A series of water passage holes 5 and 6 are provided at predetermined intervals in the plate-like bodies 2 and 3. By burying continuously or intermittently in the vertical direction so that the length direction of the holes 5 and 6 is the vertical direction of the embankment 8, a vertical drainage layer in the embankment 8 is formed. Further, the drain materials B and C are flexible and fit well with the surrounding ground 8, so that the space between the materials B and C and the soil 8 becomes dense.

FIG. 2 shows a drain material B in which water holes 5 are provided within the thickness of a slightly thick plate 2.

FIG. 3 shows a drain material C in which the thin plate-like body 2 and the water passage hole 6 are formed in a substantially honeycomb shape.
In addition, although each of the water passage holes 5 and 6 has a circular cross section, it is not limited to this.

The method for embedding the plate-like bodies 2 and 3 in the embankment 8 or the like is not limited to the above-described method in which the water holes 5 and 6 of the plate-like bodies 2 and 3 are vertically buried and buried. The plate-like body 2 may be buried in a horizontally laminated state, or the plate-like body 2 may be buried horizontally in an alternate layer with the embankment 8.

As described above, by the water permeation function of the plate-like bodies 2 and 3 of the drain members B and C and the drainage function of the water holes 5 and 6, the consolidation is promoted by sucking water in the ground 8. Finally, the same effect as <B> can be obtained.

<D> Embodiment of drain material D [3]
(FIGS. 4 and 5) The biodegradable plastic plate 2 having the water holes 5 described in the above <B> and the biodegradable plastic mesh plates 4 and 4 have a sandwich structure. A mat D is formed and buried in the underground 8 to form a drainage layer. Since the surface of the mat D has a mesh structure, the mat D has a large frictional resistance with the soil 8, and the mat D as a whole has a structure having water permeability and drainage.

The method of embedding the mat D in the embankment 8 includes embedding a plurality of mats D in a horizontally stacked state, embedding the mat D horizontally and alternately with the embankment 8, and embedding the mat D. The water hole 5 can be erected vertically.

[0015] With these, the water in the ground is sucked up by the permeation and drainage function of the mat D to consolidate the ground,
Finally, the mat D of the biodegradable plastic plates 2 and 4 is decomposed, so that there is no hindrance to the post-construction structure and the environment is not polluted.

The thickness of each of the drain members A, B, C, and D, the diameter and the interval of the water holes 5, 6 are appropriately determined according to the water content in the ground 8 and the burial depth of the drain members. Can be decided.

[0017]

Since the present invention has been described above,
The following effects can be obtained. <A> The drain material can easily and easily absorb water in the ground in the short term by embedding a bag packed pack, a plate-like body, or a mat having a sandwich structure in the ground to form a drainage layer. It quickly permeates and discharges and consolidates, and as a result, early reinforcement of the ground such as embankment, increase in trafficability and prevention of slope collapse can be achieved. <B> Since the drain material is made of biodegradable plastic, it will be decomposed in the ground for a long time, and will not pollute the environment. In addition, it does not hinder the subsequent excavation of the ground.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a bag-shaped drain material according to the present invention.

FIG. 2 is a perspective view showing an embodiment of a drain material having a water passage hole.

FIG. 3 is a perspective view showing another embodiment of a drain material having a water passage hole.

FIG. 4 is a perspective view showing a plate member of a drain material having a mesh structure.

FIG. 5 is a perspective view showing one embodiment of a drain material having a sandwich structure.

Claims (3)

[Claims] 1. A drain material comprising a biodegradable plastic formed into a bag with a mesh structure and a bag packed with sand, crushed stone, or the like. 2. A drain comprising: a biodegradable plastic formed in a plate-like body, wherein said plate-like body is provided with a series of water holes at predetermined intervals. Wood. 3. A plate having a biodegradable plastic formed in a plate and having a series of water holes at predetermined intervals, and a plate having a network structure of the biodegradable plastic. A drain material comprising a mat formed in a sandwich structure with a body.