JP2507612Y2 - Structure of net bag for sand pile formation - Google Patents

Description

TECHNICAL FIELD The present invention relates to a structure of a net bag for forming a sand pile, and more particularly to a structure of a net bag for forming a sand pile having a vertically long tubular shape.

[Conventional technology]

Conventionally, many sand piles have been erected on soft ground to drain the moisture around the sand piles to the surface through the sand piles, promoting consolidation and stabilizing the soft ground in a short period of time. However, in soft ground with a relatively large amount of clay components, the amount of water squeezed out from the clay layer due to consolidation to sand piles is small, and even highly permeable sand piles, such as river sand, Nowadays, there is a shortage of high-quality materials, and even if alternative permeable materials are used, there is a problem in that there is no reliable water drainage capacity (water flow capacity). And, because such problems hinder the consolidation promoting effect of the vertical drain method and cause various obstacles to the improvement work of soft ground, it is the actual situation that the concerned parties are having difficulty in the measures. is there.

As a solution to these problems,
In the 83813 publication, at least one ear-shaped protrusion is continuously formed along the longitudinal axis of the net bag from the lower end to the upper end of the net bag on the side of the net bag body for forming a vertically elongated sand pile. And a net bag for forming sand piles, in which a nonwoven fabric is added to the ear-shaped protrusions.

[Problems to be solved by the device]

Further, by adopting the device of Japanese Utility Model Laid-Open No. 49-83813, drainage is performed not only through the sand pile but also through the non-woven fabric attached to the ear-shaped protrusions, so that the drainage efficiency is high. It is a thing. However, the ears are usually located at one location, or at most two diametrically opposed locations.
Since it is formed only at the places, the non-woven fabrics attached to the ear-shaped protrusions are at most two places. Therefore, in the entire circumference of the bag body, the area where the nonwoven fabric can drain water from the soft ground is limited, and there is a problem that the improvement of drainage efficiency has a certain limit.

[Means for solving the problem]

The present invention has been made to solve the above problems, and an object thereof is to provide one capable of draining water in soft ground from the entire circumference of the bag body. The gist is that the tubular mesh bag main body is composed of a warp yarn made of a water-impermeable material having high tensile strength and durability, and a warp yarn made of a water-permeable material arranged at intervals of several warp yarns. ,
Warp yarns formed by weaving yarns are formed, and warp yarns made of the water-permeable material are continuously arranged at desired intervals along the circumferential direction of the net bag body and along the longitudinal direction from the lower tip portion to the upper end portion. The structure of the net bag for forming sand piles is characterized in that

[Embodiment of Device]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. In the figure, 4 is a net bag body, and the warp yarn 1 made of an impermeable material having high tensile strength and durability and the net bag body 4 are provided. A plain weave structure in which wefts are driven into warp yarns 2 made of water-permeable fibers such as natural fibers arranged at intervals of several warp yarns 1 made of the water-impermeable material along the circumferential direction. It was formed. Therefore, the warp yarns 2 made of the water-permeable fiber are continuously arranged from the lower end portion to the upper end portion of the net bag body 4. In the figure, 3 is a net bag body 4
The reinforcing ears are provided in the diametrical direction.

Next, the operation of the sand pile forming net bag having the above structure will be described. First, an iron pipe 5 having an openable and closable tip is driven into the soft ground 6 with the tip closed, and then the iron pipe 5
Sand or the like is put into the bottom of the net bag body 4 at the closed end of the net bag body 4, and then the net bag body 4 is loaded into the iron pipe 5 while further inserting sand or a material having water permeability instead of sand. When the net bag body 4 reaches the desired depth, the iron pipe 5
The tip of the is opened and pulled out from the soft ground 6, and the net bag body 4 containing sand is left in the soft ground 6 to form sand piles.

Thus, when this sand pile drains the water collected from the soft ground 6 through the sand in the net bag body 4, it is continuously distributed from its lower tip portion to the upper end portion constituting the net bag body 4. The water is also drained through the warp yarns 2 made of the water-permeable fibers provided. In this case, the warp yarn 2 made of fibers having water permeability
Are arranged at a predetermined interval along the circumferential direction of the net bag body 4, so that they come into contact with the soft ground 6 over the entire circumferential surface. Therefore, as the number of contact points of the warp yarns 2 made of water-permeable fibers with the soft ground 6 increases, the area where water can be collected by each warp yarn 2 increases by the number of the warp yarns 2, and the drainage function improves. . In particular, when the soft ground 6 is made of clay, only a limited area adjacent to the warp yarns 2 can be drained, so that the effect is remarkable. Warp yarn 2
By using natural fibers for the water, the drainage capacity, that is, the water flow capacity can be further improved.
Is also composed of the warp yarns 1 made of a water-impermeable material having high tensile strength and durability, so that the strength is maintained even in the overall configuration of the net bag body 4.

[Effect of device]

As described above, the structure of the net bag for forming a sand pile according to the present invention comprises a tubular net bag main body, a warp yarn made of an impermeable material having high tensile strength and durability, and every few warp yarns. The warp yarns made of a water-permeable material are formed with a woven structure into which the weft yarns are driven, and the warp yarns made of the water-permeable material are provided at desired intervals along the circumferential direction of the mesh bag body. In addition, since it is configured to be continuous from the lower tip portion to the upper end portion along the longitudinal direction, when used, a warp yarn made of water-permeable fibers and a soft ground are arranged over the entire circumference of the net bag body. Since the number of contact points increases and the area where water can be collected by this warp yarn also increases, various effects such as improving the drainage function and not only reducing the strength of the net bag body but also having durability can be achieved. is there.

[Brief description of drawings]

FIG. 1 is an enlarged perspective view of a main part of a net bag for forming sand piles according to the present invention, and FIG. 2 is a longitudinal sectional explanatory view showing a usage state. 1 ... Warp yarn made of impermeable material, 2 ... Warp yarn made of water-permeable fiber, 3 ... Reinforcing ears, 4 ... Mesh bag body, 5 ... Iron pipe, 6 ... Soft ground .

Claims (1)

(57) [Scope of utility model registration request] 1. A tubular mesh bag main body comprising a warp yarn made of a water-impermeable material having high tensile strength and durability and warp yarns made of a water-permeable material arranged at intervals of several warp yarns. , Warp yarns are formed into a woven fabric structure, and the warp yarns made of the water-permeable material are arranged at desired intervals along the circumferential direction of the mesh bag body, and along the longitudinal direction from the lower tip portion to the upper end portion A structure of a net bag for forming a sand pile, which is characterized by being continuous.