JP2000087344A - Drainage material casting casing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such a drainage material casting casing as it is not crushed by resistance, etc., in the case drainage material is to be cast in the ground. SOLUTION: A drainage material casting casing 10 is used for holding drainage material in the case it is cast in the ground. In that case, in the case a pair of long casing materials 11, 12 are combined with each other, a drainage material storage section 14 for storing the drainage material is formed between both casing materials and, at the same time, bearing pieces 15 projected in the direction of the inside of one casing material 12 are provided in at least the inside of the other casing material 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage material casting casing, and more particularly to a drainage material (drain material) which is used for holding a drainage material when the drainage material is drained into the ground by a press-fitting machine. The present invention relates to a drainage casting casing.

[0002]

2. Description of the Related Art Since drainage materials used for ground improvement and drainage of embankments are made of a flexible material such as a synthetic resin nonwoven fabric,
When placing drainage material in the ground, the drainage material is stored and held in a special casing.

However, since the conventional casing is formed in a simple flat plate shape corresponding to the outer shape of the drainage material, the casing has insufficient rigidity, and the casing collapses inward during casting depending on the soil quality of the casting portion. When removing the casing, the drainage material may be damaged or the drainage material may be pulled out.

Accordingly, an object of the present invention is to provide a drainage material casting casing having a structure for preventing a casing holding a drainage material from being crushed during casting.

[0005]

In order to achieve the above-mentioned object, a drainage material casting casing according to the present invention is a drainage material placement casing for holding a drainage material when it is poured into the ground. When a pair of long casing materials are combined, a storage portion for storing the drainage material is formed between the two casing materials, and at least one casing material has an inner surface facing the inner surface direction of the other casing material. A supporting piece protruding therefrom is provided.

[0006]

FIG. 1 is a sectional view showing a first embodiment of a drainage material casting casing according to the present invention, and FIG. 2 is a side view showing a state at the time of drainage material placement. The casing 10 for placing drainage material includes a pair of flat casing materials 11 and 1.
And a drainage material storage portion for storing a planar drainage material between both ends in the width direction when the both ends are combined by an appropriate fixing means such as a bolt nut 13 or fitting. 14 are formed.

A support piece 15 is provided on the inner surface of one casing member 11 so as to protrude in the direction of the inner surface of the other casing member 12 and the tip of which contacts the inner surface of the other casing member 12. The support piece 15 is provided over the entire length of the casing material 11, and the support piece 15 partitions the drainage material storage section 14 into three chambers in the width direction.

As shown in FIG. 2, the casing 10 in which the drainage material 1 is stored in each room of the drainage material storage unit 14 is horizontally moved from the bottom of the embankment 3 to the ground inside the embankment by the press-in machine 2. Pressed in the direction. When the casing 10 is pulled out after press-fitting for a predetermined length, the drainage material 1 remains in the ground by the anchor 4 provided at the tip of the drainage material 1, whereby the drainage material 1 is placed at a predetermined position.

At this time, since the support piece 15 is provided on the inner surface of the casing member 11, the casing 10 does not collapse even if a large force is applied in the thickness direction of the casing 10 during casting. When draining, the drainage material 1 is not damaged, and the drainage material 1 is not pulled out. Furthermore, by providing the support piece 15 over the entire length, the rigidity in the longitudinal direction of the casing 10 can be improved, and the casing 10 does not bend.

The sheet-like drainage material 1 is provided with a water-permeable layer made of a resin-based nonwoven fabric around a core made of a long sheet made of, for example, a synthetic resin such as polyvinyl chloride. Can be used. Normally, the thickness is about 10 mm and the width is about 300 mm, but as described above, when the drainage material storage section is divided into three chambers by the support pieces 15, if the width dimension of the casing 10 is the same, The width of the drainage material 1 may be reduced to 1/3 of 100 mm. However, when the width of the casing 10 is increased to, for example, 450 mm by the effect of improving the rigidity of the support piece 15, three drainage materials having a width of 150 mm, which is の of the normal size, can be simultaneously poured.

The length of the drainage material 1 depends on the size and shape of the embankment 3.
When the width is 0 m and the back width is 30 m, about 10 m is appropriate. Furthermore, the interval between the castings is arbitrary, for example,
Two sets of planar drainage materials 1 with a total width of 300 mm are arranged side by side to set a width of 60.
When burying at 0 mm, the interval is about 400 mm,
It may be cast at a pitch of 1 m.

FIG. 3 is a sectional view showing a second embodiment of the drainage material casting casing according to the present invention. This casing 20
Is provided on the inner surfaces of a pair of casing members 21a, 21b with supporting pieces 22a, 22b each having a height at which the tips contact each other when the drainage material storage part 22 is formed by combining the two casing members 21a, 21b. It is a thing.
By forming in this way, the casing members 21a,
The same shape can be used as 21b.

FIG. 4 is a sectional view of a main part showing another example of the shape of the support pieces 22a and 22b.
The concave / convex fitting portion 23 that fits with each other is provided on the distal end face of the tip 22b. In this manner, the casings 20 are formed by fitting the tips of the support pieces 22a and 22b with each other.
When the torsion is generated, not only the contact state of the support pieces 22a and 22b can be maintained, but also the rigidity against the torsion can be increased.

Note that the support pieces need not necessarily be provided over the entire length of the casing material, and columnar support pieces may be provided at appropriate intervals. Further, in the above-described embodiment, an example in which the drainage material is cast in the horizontal direction has been described. However, the drainage material casting casing of the present invention can also be used when the drainage material is cast in the vertical direction.

[0015]

As described above, according to the casing for casting drainage material of the present invention, it is possible to prevent the casing from being crushed by the resistance at the time of press-fitting. The material will not be pulled out.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of a drainage material casting casing of the present invention.

FIG. 2 is a side view showing a state at the time of drainage casting.

FIG. 3 is a sectional view showing a second embodiment of the drainage material casting casing of the present invention.

FIG. 4 is a sectional view of a main part showing another example of the shape of the support piece.

[Explanation of symbols]

1 ... drainage material 2 ... press-in machine 3 ... embankment 4 ... anchor 1
0: Casing, 11, 12: Casing material, 13: Bolt and nut, 14: Drainage material storage part, 15: Support piece, 20
... casing, 21a, 21b ... casing material, 22
a, 22b: support piece, 23: concave and convex fitting portion

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasuo Fujishima 5-8, Mitsuya-cho, Nagahama-shi, Shiga Prefecture F-term (reference) in Mitsubishi Plastics' Nagahama Plant 2D043 DA09 DB06

Claims (1)

[Claims] 1. A drainage material casting casing for holding a drainage material at the time of casting in the ground, wherein when a pair of long casing materials are combined, the casing is disposed between the two casing materials. A casing for forming a drainage material, comprising a storage portion for storing a drainage material, and a support piece protruding in an inner surface direction of the other casing material provided on an inner surface of at least one casing material.