JPS60215914A - Soft ground draining work and multi-faced paper draining material therefor - Google Patents

Abstract

PURPOSE:To reduce the cost of soft ground draining work by driving a multi- faced paper drain material having multi-faced water absortive faces to be shaped into a cross-shaped form at its central axis line when absorbing water into the soft ground. CONSTITUTION:A paper drain material 2a is formed by bonding or sewing drain papers 2C of a cross-shaped form at its central axis line O-O at the central axis line. When the material 2a is inserted into a casing 1, it is guided into a guide hole 4, opened into a cross-shaped form 2b from the flat plate form slowly, and inserted into the drain hole 5. When pulling up the casing 1, the material 2b to be sensed of the draining material 2 is detected by a sensor 3 unless the material 2 is pulled up with the casing 1 for confirming the staying of the drain material 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a soft ground drain construction method and a multifaceted paper drain material used in the construction method.

(Prior Art and Object and Structure of the Present Invention) The paper drain material used in the conventional soft ground drain construction method is in the form of a single flat plate. However, since a single sheet of flat paper drain material has a water absorbing surface only on its negative side, the amount of water absorbed within the drain hole is naturally limited.

The present invention aims to increase the amount of water absorbed by a single piece of paper drain material by creating a multifaceted structure that can accommodate such a single-letter paper drain material in the drain hole.

(Example theory BA) First, the present invention will be described in detail following the reference numerals in the drawings.

1: A guide hole 4 into which the paper drain material 2 is inserted is bored using a mandrel of a paper drain material casting machine.

As shown in Fig. 2, the central axis (0
-0) in the center, cross-shaped drain paper 2
Glue or machine sew C, 2C, 2G, 2C,
New→terami, non-(m1e) Glue or machine sew drain paper 2C22c, 2c, 2c in a cross shape around the center axis line (0-0), and fold it into a flat plate when not absorbing water.

Then, at the central axis line (0-0), a crease line 2e is provided to make it easier to bend, and a curl is formed. The drain material in this state is referred to as material 2a.

This flat material 2a is the guide hole 4 of the casing 1.
When inserted, it is guided into the guide hole 4 and becomes a cross-shaped drain material 2b. In addition, sensing objects 2f are embedded in each or one of the drain papers 2c at predetermined intervals, and initially a flat plate-shaped drain material 1a is received.
The lower end of the guide hole 4 has a cross shape.

With five drain holes, the cross-shaped drain material 2 has a multifaceted structure such that it is accommodated in the drain hole 5.

6: A cross-shaped guide hole 6a is bored with the tip cone of the pouring machine.

(Explanation of Example) A, a,.

■ Supply paper drain material 2a to Se-Okigu 1. The material 2a is made by gluing or sewing 2d a cross-shaped drain paper 2c centered on the central axis O-O as shown in FIG. 2 along the central axis O-0. Then, there is a crease line on the - side near glued or machine-stitched 2d.
;le, 2e are attached, and each drain paper 2c, 2c is shaped so that it is easy to break, with the crease line 2e, 2e as the center.

■ When the drain material material 2a is inserted into the casing 1,
The drain material material 2a is guided through the guide hole 4, and is successively inserted into the drain hole 5 in the shape of a cross from the flat plate shown in FIG.

■ Insert drain material 2 into drain hole 5 together with casing 1.
(Fig. 5 ■) As shown in Fig. 5 ■,
Pull up casing 1.

At this time, a sensing device 3 is provided in a portion of the casing 1 where the drain material 2 is a flat plate. Therefore, if the drain material 2 does not rise together with the casing 1, the sensing device 3
senses the sensed object 2f of the drain material 2, and the drain material 2
It is possible to detect that the values are not rising together.

Moreover, if the drain material 2 goes up together, the sensing device 3 does not sense the sensed body 2f of the drain material 2, so it senses that the drain material 2 goes up together.

Further, in the present invention, since the sensing device 3 is provided at a position where the drain material 2 is in a flat plate shape, it is possible to detect whether or not the drain material 2 has come up together, as in the conventional case. if,
If the sensing device 3 is provided in the cross-shaped portion of the drain material 2, the structure of the casing 1 will become complicated, which is not preferable.

Further, the tip cone 6 is provided with a cross-shaped guide hole 6a for maintaining the cross-shaped shape of the drain material 2b. Without the tip cone 6, the shape of the cross-shaped F lane material 2b may not be maintained when the casing 1 is pulled out.

■ The drain material 2 of the present invention is made of four sheets of rune paper 2C /I61, /I62, waste 3, /
I64 is bonded together, and at this time, the bonding center axis 0-
0, a slit 7 is provided between the joint portions 2d. The position of the slit 7 is AI, as shown in Figure 6.
It is preferable that the position of the joint 8 between the peno ξ- of 42 and the paper of 3 and /I64 is made so that it does not slide in the central axis O=0 direction.

By providing the slit 7 in this way, when the ground G subsides as shown in FIG.
This part will bend in response to ground subsidence and will not be destroyed. Therefore, capillary action of groundwater can be carried out without any problem.

(2) Although the above embodiments have been described assuming that the drain material 2 has a cross-shaped multifaceted structure, the present invention can also be applied to a three-faced or six-faced multifaceted structure other than a cross.

(Effects of the present invention) (1) Since the drain material has a polyhedral shape such as a cross shape, its water absorption capacity is significantly increased compared to the conventional drain material having a single character shape. Therefore, the number of drain materials placed per unit area can be reduced, and the ground improvement cost can be significantly reduced.

(2) Since the sensing device 3 is provided in the part where the drain material 2 forms a single letter, it can be detected whether or not the drain material 2 has risen together with the same structure as the conventional one.

If the sensing device 3 is provided in the cross-shaped portion, the structure of the casing will become complicated, which is not preferable.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the action of the drain material of the present invention, Fig. 4 is a plan view of the drain hole 5, Fig. 5 is an explanatory diagram of the action of the casing 1, Fig. 5 is a plan view of the tip cone 6, Figure ■■: Skeleton diagram when the slit 7 is provided in the drain material of the present invention, Figure 7: Also an explanatory diagram of the action of the slit 7, 1...
・Casing, 2... River/drain material, 2a...
・・Flat material, 2b・Old・Cross-shaped drain material, 2c・・Mark・drain paper, 2d・・・・
Adhesive or machine stitch, 2e, old... crease line, 2f
... Sensed object, 3 ... Sensing device, 4.
... Drain material guide hole, 5... Drain hole, 6... Tip cone, 6a old... Guide hole,
7. River... Vertical slit, 0-0... Center axis line. @ ■ 0 Fl(33 104 106

Claims (1)

[Claims] ■ A soft ground drain in which the paper drain material (2) is cast into soft ground using a casting machine provided with a guide hole (4) for inserting the paper drain material (2) into the casing (1). In the construction method, a polyhedral paper drain material (2) having a polyhedral water absorption surface that forms a cross shape around the central axis (0-0) when absorbing water is used, and the guide hole (4) The type paper drain material (2) is aligned with the center axis (0
-0) is folded into a single flat plate material (
After being inserted into the guide hole (4) of the casing (1) as 2a), when it reaches the lower end of the guide hole (4), the center axis line (〇-〇)
The paper drain material (2) is characterized by having a crisscross-shaped multi-sided water absorption surface that absorbs water inside the drain hole (5). Soft ground drain construction method. ■ Place the sensing object (2f) on the multifaceted paper drain material (2).
) is embedded, and the sensing device (3) is provided at a position where the paper drain material (2) of the casing (1) is a flat material (2a), and the paper drain material (2) is the same as the casing (1). The soft ground drain construction method according to claim 1, which detects whether or not the drain is going up. ■ It is a multifaceted paper drain material that has a polyhedral water absorption surface that forms a cross shape around the central axis (0-0) when water is absorbed, and when it does not absorb water, it is centered around the central axis (0-0).
A multifaceted paper drain material used in a soft ground drain construction method, characterized in that a cross-shaped polyhedron is folded around 0) to form a single flat plate. ■ It has slits (7) intermittently along the central axis (0-0) of the cross-shaped polyhedron, and can bend when the ground subsides. The paper drain material described in item 1.