JP2933418B2 - How to fill underground cavities - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for embedding an underground cavity, in which a cavity formed in the soil by pulling and removing a buried pipe is buried by an embedding body.

[0002]

2. Description of the Related Art Conventionally, in embedding the above-mentioned hollow hole, after removing and removing the buried pipe to be removed, the hollow hole is filled with muddy soil by a pump, or a columnar resin block having a diameter substantially equal to the diameter of the hollow hole. Has been adopted.

[0003]

In the case of the embedding method based on earth and sand filling, it is difficult to pull out and move the hose inserted into the hollow hole at a speed equal to the pump discharge amount with earth and sand discharge. Was not evenly clogged in the hollow hole, and the embedding accuracy tended to be poor. Furthermore, the necessity of installation and cleaning of a pump and the like requires time and effort and increases the implementation cost. SUMMARY OF THE INVENTION An object of the present invention is to provide a method for embedding an underground cavity which can be easily and accurately embedded at a low cost.

[0004]

Means for Solving the Problems In order to achieve the above object, the first invention is directed to an underground cavity after removing a buried pipe.
On the side of the opening, a long bag for storing soil and sand that has been inverted and wound up is held, and the long bag is fed out while filling the long bag with earth and sand. The second invention is characterized in that earth and sand are pushed into the underground cavity, and in the underground cavity after removal of the buried pipe, a guide cylinder is inserted into the opening side of the underground cavity, and then inverted and wound up. The long bag for storing earth and sand stored in the state is held at the opening side, and the long bag is fed out while filling and hardening the long bag in the guide cylinder, and the solid bag is solidified. The obtained earth and sand is pushed into the underground cavity together with the long bag, and the underground cavity is buried by this repetition, and the operation and effect are as follows.

[0005]

In other words, according to the first aspect of the present invention, since the earth and sand are pushed into the underground forming hole while being stored in the long bag, for example, when the hollow hole is directly filled with the earth and sand using a push rod, In comparison, the frictional resistance received from the inner wall surface of the hollow hole is reduced, and the soil and sand can be smoothly pushed into the hollow hole together with the long bag.

Since the long bag is turned upside down and compactly wound, even if the pit as a working hole is narrow and the hollow hole is long, it can be easily handled. By filling the sand into the cavity while filling the cavity with the soil according to the shape of the cavity sequentially from the tip of the shakubag, the earth and sand can be spread evenly to the corners of the cavity, and the embedding accuracy Can be better.

[0007] Further, when a long bag is filled with dried earth and sand and pushed into the cavity, the soil absorbs moisture around the cavity and expands, thereby eliminating the void in the cavity. Can be.

According to the second aspect of the invention, in addition to the above operation, even when the amount of earth and sand is excessively large, the earth and sand can be formed in the same shape as the hollow portion of the guide cylinder around the opening of the hollow hole. Because it is possible, when pushing the earth and sand into the hollow hole, the frictional resistance received from the inner wall surface of the hollow hole can be further reduced, and further, the guide cylinder guides the hollow hole, and the earth and sand is very much It can be pushed in smoothly.

[0009]

Therefore, according to the first aspect of the present invention, there is no need to install a pump or the like, the pits are narrow,
In addition, the earth and sand can be easily pushed in even if the cavity is long, and the earth and sand can be easily pushed in, and the embedding accuracy can be improved. A method of embedding an underground cavity hole which is excellent in efficiency and economic efficiency and hardly causes ground collapse after embedding can be provided.

According to the second aspect of the present invention, since the earth and sand can be more smoothly pushed into the cavity, it is possible to provide a method of embedding the underground cavity having very good workability in addition to the above-mentioned effects. Was.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1 (a), with respect to the underground hollow hole H after removing the buried pipe in the soil, the earth and sand storage turned upside down to the opening side in the working hole 8 in the working hole 8. Holding a long bag for use. The long bag 1 is to be embedded in the hollow hole H together with the earth and sand 2 at the site, and is made of cotton, hemp, or paper so as to be easily rotten after being embedded.

The long bag 1 in the above-mentioned state is filled with earth and sand 2 at a predetermined amount from the tip side thereof, and the earth and sand 2 is artificially pressed with the push rod 4 to be rolled up. A certain long bag 1 is fed out, and the sand-filled portion is pushed into the hollow hole H. By this repetition, the tip portion reaches the inside of the hollow hole H as shown in FIG. , Hollow hole H
Is filled with earth and sand 2.

In order to ensure a sufficient and reliable filling of the hole, the soil 2 is filled with an expanding material 3 capable of expanding in volume by water absorption and lime as a soil stabilizer at a predetermined ratio. Added.

[Alternative Embodiment] As shown in FIG.
On the other hand, the iron-made guide tube 5 is fitted into the opening side thereof, and the long bag 1 which has been turned upside down and wound is held at the opening side, and the long bag 1 is inserted into the guide tube 5. 1 is filled with earth and sand 2, and the long bag 1 is fed out while being solidified, and the solid earth and sand 2 which has been solidified are pushed into the underground hollow hole H together with the long bag 1, and the underground hollow hole H is thereby repeated.
May be embedded.

The long bag 1 may be made of thin rubber.

Dry soil or fine-grained soil may be used instead of the site soil 2. When the dry soil is used, after being pushed into the hollow hole H, the dry soil absorbs the surrounding moisture well and expands, so that the void in the hollow hole H can be effectively eliminated, and the embedding accuracy can be improved. .

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIGS. 1A and 1B are explanatory diagrams of an embedding point, and FIGS.

FIG. 2 is an explanatory view of an embedding point of another embodiment.

[Explanation of symbols]

 1 long bag 2 earth and sand H underground cavity

Claims (2)

(57) [Claims] 1. A long bag (1) for storing soil and sand which has been turned upside down and wound up in the opening side of an underground hollow hole (H) after removal of a buried pipe. Shakubukuro (1)
The long bag (1) is paid out while filling the soil and the sand (2) into the underground cavity, and the earth and sand (2) is pushed into the underground cavity (H) together with the long bag (1). Method. 2. An underground hollow hole (H) from which a buried pipe has been removed, a guide cylinder (5) is fitted into the opening side thereof, and the bag is turned upside down and wound into a long bag for storing soil and sand (H). 1)
The guide tube (5) is held at the opening side and the guide tube (5).
Inside, the long bag (1) is filled with earth and sand (2) and solidified, the long bag (1) is fed out, and the solid earth and sand (2) is solidified into the long bag (1). 1) A method of embedding an underground cavity hole in which the entire underground cavity hole (H) is pushed into the underground cavity hole (H) and the above operation is repeated to embed the underground cavity hole (H).