JPH0332647B2 - - Google Patents

Description

Detailed Description of the Invention (Technical Field) The present invention relates to partially woven cloth,
The present invention relates to a filter sheet for civil engineering, which is suitable for use as a pollution prevention film, etc., which is mainly used to prevent water pollution.

(Prior art and its problems) Various methods have been proposed to prevent water pollution in civil engineering works on the sea, rivers, lakes, etc. ``In a float fence having a float 1 in the upper part and a curtain 2 in the lower part that is tight enough to prevent the free passage of water, there is a curtain 2 in the middle of the curtain 2 to the extent that water can freely pass in the longitudinal direction. ``Structure of a curtain part of a float fence comprising a net-like material 3 having a mesh size of .'' has been proposed. In this structure, a net-like material 3 is provided in the middle of the curtain 2 and has a mesh size that allows water to freely pass through in the longitudinal direction.
This net-like material 3 is arranged only in a part, that is, in the middle of the float fence. Therefore, the mesh 3 in this structure has a mesh size that allows water to pass through freely, and this part cannot actively capture pollutants in the water, but simply traps water (pollutants). It allows objects (which may also contain substances) to pass through.

In addition, the conventional water pollution prevention membrane 20 that has been proposed for preventing water pollution, for example, as shown in FIG. This is to cover the area around the work site and isolate it from other areas in order to prevent fine earth and sand caused by the agitation of the water bottom from spreading around the work site. By the way, during this work, the water pollution prevention membrane 20
Even if wave force is applied to the water pollution prevention membrane 20, it is necessary to prevent the water pollution prevention membrane 20 from being displaced or damaged by this force. In order to solve this problem, for the conventional water pollution prevention membrane 20, a cloth as shown in, for example, Japanese Utility Model Application Publication No. 53-25751 has been proposed. This fabric has a low-density section in which a large number of fine strands are aligned only in the vertical direction to form a sash-like structure, and a low-density section in which a large number of fine strands are arranged perpendicularly to the longitudinal strands to form tissue binding or A low-density part consisting of bonded fine filaments is arranged vertically and alternately, and the low-density part is made up of a large number of fine filaments aligned only in the vertical direction to form a sash-like shape, which extends long in the horizontal direction. It is something that However, depending on the fabric, when the fabric is folded at the slit-like portion, the gaps between the threads forming the slit-like portion may be wide open. This is because the blind portion is formed by aligning a large number of fine fibers only in the vertical direction and extending long in the lateral direction of the cloth. If this happens, soil, sand, etc. that should not be allowed to leak out will flow out from the wide open portion, making it impossible to achieve the intended purpose.

(Purpose) The present invention was made in view of the above-mentioned circumstances, and its purpose is to provide a civil engineering film that is suitable for use as a water pollution prevention membrane and that can be easily constructed. Our purpose is to provide filter sheets for

(Structure) In order to achieve the above object, the gist of the present invention is to provide a woven part in which the warp and weft are woven together, and a woven part in which the warp and weft are woven together, and each thread that is continuous with the warp and weft is completely or partially woven. A filter sheet for civil engineering consisting of a non-woven intersecting part that is only woven in the woven fabric, and characterized in that these woven parts and non-woven intersecting parts are woven alternately so as to be continuous vertically and horizontally as a whole. This is a filter sheet for civil engineering.

(Example) The present invention will be explained below based on an example shown in the drawings. Fig. 1 shows a filter sheet 10 for civil engineering according to the present invention, and this filter sheet 10 for civil engineering uses: It is formed by weaving warp yarns 11 and weft yarns 12 that have the entire length of the filter sheet 10 and are made of unbroken synthetic fibers. Moreover, this filter sheet 10 for civil engineering has a woven portion 13 in which warp yarns 11 and weft yarns 12 are interwoven with each other, and a non-woven intersecting portion 14 in which warp yarns 11 and weft yarns 12 are completely or only partially woven. It is made up of The woven portion 13 is made by weaving the warp yarns 11 and the weft yarns 12 by a conventional method, while the non-woven intersection portion 14 is made by weaving the warp yarns 11 and the weft yarns 12 by a conventional method, while the non-woven intersection portion 14 is made by weaving the warp yarns 11 and the weft yarns 12 by a conventional method. This is a portion where the weft yarn 12 is simply present in the form of a blind.
Typically, this non-woven intersecting portion 14 has a side of 3 to 50 cm.
As shown in FIG. 1, they are arranged in large numbers at predetermined intervals in the vertical and horizontal directions, and the other part of the civil engineering filter sheet 10 is a woven part 13. It is. In other words, the woven portions 13 and the non-woven intersecting portions 14 are woven alternately in the vertical and horizontal directions. Of course,
This non-woven intersection 14 is not limited to the case where the warp yarn 11 and the weft yarn 12 are at the same position as shown in FIG. 12 or the warp threads 11 may be arranged alternately. Further, each non-woven intersection portion 14 may be partially formed with a local woven portion 15 similar to the woven portion 13, as shown in FIG. That is, in the non-woven intersection 14, each warp yarn 11
The weft yarn 12 may also be partially woven. Note that such local woven portions 15 are formed when one side of each non-woven intersection portion 14 is formed.
This is when the size is 50cm or more.

(Effects) When the filter sheet 10 for civil engineering constructed as described above is used as the water pollution prevention cloth 20 shown in FIG. 5, water can freely flow in and out from each non-woven intersection portion 14. The reason for this is that the warp yarns 11 and weft yarns 12 constituting the non-woven intersecting portion 14 are in a free state, so that the non-woven intersecting portion 14
This is because the ``sudare'' in the vertical direction and the ``blind'' in the horizontal direction exist at the same time. That is, in this non-woven intersection part 14, each warp thread 11 and weft thread 12 forming this part are free, and each warp thread 11 and weft thread 12 forming this part are free.
Unlike the woven portion 13, which is formed in a dense manner, the non-woven intersecting portion 14 is designed to allow water to pass through easily. At the same time, each warp yarn 11 and weft yarn 12 of the non-woven intersecting portion 14 captures the contaminants contained in the water as it passes through.

Therefore, even if force from waves is applied to the water pollution prevention cloth 20, the water can escape from the blind-like portions of each non-woven intersecting portion 14, and the force from the waves is directly applied to the water pollution prevention cloth 20. It has no effect. Also, at this time, the water pollution prevention cloth 2
The floating soil, sand, etc. inside the water pollution prevention fabric 20 are prevented from coming out by the warp yarns 11 and weft yarns 12 that constitute each non-woven intersection portion 14. The water in the area will not become extremely polluted. Furthermore, each non-woven intersecting portion 14 is held in its upper and lower sides by the woven portion 13 located around it, and each non-woven intersecting portion 14 is held by the warp yarns 11 and the weft yarns 12. The water pollution prevention cloth 2
Even if the threads 0 are bent or pulled horizontally, vertically, and vertically, the warp threads 11 and weft threads 12 will not be separated from each other by a large distance. Of course, the woven portion 13 of the civil engineering filter sheet 10 is impermeable to both water and dirt. Therefore, this filter sheet 10 for civil engineering does not allow leakage of earth and sand, which has been a problem in the past, and can therefore be fully used as the water pollution prevention cloth 20. Moreover, the filter sheet 10 for civil engineering according to the present invention
can be used not only as the water pollution prevention cloth 20, but also as a surface treatment sheet for soft ground formed by reclaiming sludge or the like in other cases. In this case, when force is gradually applied to the soft ground on which the civil engineering filter sheet 10 is laid, water is slowly drained from the non-woven intersection 14, and when force is suddenly applied to the soft ground. Since sludge and the like are sometimes discharged from each non-woven intersection part 14, it goes without saying that it can be used satisfactorily as a surface treatment sheet for soft ground. It will not be damaged either. Of course, this filter sheet 10 for civil engineering can be constructed by simply using a conventional weaving machine and changing the weaving method between each warp yarn 11 and weft yarn 12.
This is extremely easy to implement.

(Summary) As described in detail above, in the present invention, as exemplified in the above embodiment, the woven portion where the warp and weft are woven together, and each yarn that is continuous with the warp and weft are completely Alternatively, it is a filter sheet for civil engineering consisting of non-woven intersecting parts that are only partially woven, and these woven parts and non-woven intersecting parts are woven alternately so as to be completely continuous vertically and horizontally. This makes it possible to provide a civil engineering filter sheet suitable for use as a water pollution prevention membrane with a simple structure.

[Brief explanation of drawings]

FIG. 1 is a plan view of a filter sheet for civil engineering according to the present invention, FIG. 2 is an enlarged perspective view of the main part of FIG.
FIG. 3 shows a second embodiment of a non-woven intersection.
FIG. 4 is a perspective view showing still another embodiment of the non-woven intersecting portion, and FIG. 5 is a longitudinal cross-sectional view for explaining the water pollution prevention cloth. Explanation of symbols, 10... Filter sheet for civil engineering, 11... Warp, 12... Weft, 13...
Woven portion, 14...Non-woven intersecting portion, 15...Local woven portion, 20...Water pollution prevention fabric.

Claims (1)

[Claims] 1. A filter sheet for civil engineering consisting of a woven part in which warp and weft threads are woven together, and a non-woven intersecting part in which threads continuous with the warp threads and weft threads are completely or only partially woven. A filter sheet for civil engineering is characterized in that these woven portions and non-woven intersecting portions are woven alternately so as to be continuous in the vertical and horizontal directions.