Transpiration method and transpiration promotion sheet

Abstract

To provide a method for efficiently and simply transpirating water present in a target area such as soil or a pond.SOLUTION: A lower part 2a of a transpiration promotion sheet 2, in which absorbent fibers 6 are woven in a predetermined direction, is positioned inside the soil S, and an upper part 2b of the transpiration promotion sheet 2 is positioned outside the soil S, so that moisture present in the soil S is absorbed by the lower part 2a, and the moisture absorbed by the lower part 2a is guided to the upper part 2b and transpires from the upper part 2b.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an evaporation method for evaporating moisture present in a target area such as soil or a pond, and an evaporation promotion sheet for promoting evaporation of moisture present in a target area such as soil or a pond. [Background technology]

[0002] Ground improvement is necessary to carry out construction work on soft ground that contains a lot of moisture. Known ground improvement methods include, for example, driving a large number of vertical drains such as sand drains vertically from the ground surface to shorten the drainage distance, promote consolidation settlement, and increase the ground strength (see, for example, Patent Document 1).

[0003] In addition, when removing stagnant water or groundwater from soil that contains a lot of moisture, the water may be pumped up from the soil using a pump and then spread on the ground surface to allow it to evaporate. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-323897 Summary of the Invention [Problem to be solved by the invention]

[0005] The sand drain method is a large-scale method that requires a large amount of money and a considerable number of days to complete. On the other hand, the method of evaporating water by pumping it onto the ground surface is somewhat simpler than the sand drain method, but it still requires a lot of time and effort and there is room for improvement in terms of efficiency.

[0006] The object of the present invention is to provide a method for efficiently and simply evaporating moisture present in a target area such as soil or a pond, and an evaporation-promoting sheet for efficiently and simply evaporating moisture present in a target area such as soil or a pond. [Means for solving the problem]

[0007] According to the present invention, there is provided the following evaporation method for solving the above problems. "A method of transpiration that transpires stagnant water or groundwater, A lower portion of a transpiration-promoting sheet in which absorbent fibers are woven in a predetermined direction is positioned inside a target area, and an upper portion of the transpiration-promoting sheet is positioned outside the target area; The present invention provides an evaporation method for absorbing moisture present in the target area by the lower part, and guiding the moisture absorbed by the lower part to the upper part and evaporating it from the upper part.

[0008] Preferably, the fibers are woven into the transpiration-promoting sheet to form a plurality of lines extending in the predetermined direction at intervals in a direction perpendicular to the predetermined direction. One or more linear recesses extending in the predetermined direction may be formed in the fibers. It is preferable that a main portion of the transpiration-promoting sheet is formed as a geotextile, and that the fibers are woven into the main portion. It is preferable to provide a support means for supporting the upper portion of the transpiration-promoting sheet.

[0009] In addition, according to the present invention, there is provided the following transpiration-promoting sheet that solves the above problems. It is an "evaporation-promoting sheet that promotes the evaporation of moisture present in a target area such as soil or a pond, in which absorbent fibers are woven in a specified direction."

[0010] Conveniently, the fibres are woven to form a plurality of spaced lines extending in the predetermined direction at right angles to the predetermined direction. Advantageously, the fibres are formed with one or more linear recesses extending in the predetermined direction. Preferably, the main body is formed as a geotextile and the fibres are woven into the main body. Effect of the Invention

[0011] According to the present invention, it is possible to efficiently and simply transpire water present in a target area such as soil or a pond. [Brief description of the drawings]

[0012] [Figure 1] FIG. 2 is a plan view of the transpiration promotion sheet according to the present invention. [Diagram 2] Schematic diagram of soil moisture evaporation. [Diagram 3] Schematic diagram of evaporating water from a pond. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, preferred embodiments of the evaporation method and evaporation-promoting sheet of the present invention will be described with reference to the drawings.

[0014] (Transpiration promotion sheet 2) First, the transpiration-promoting sheet 2 will be described with reference to Fig. 1. The transpiration-promoting sheet 2 includes a main portion 4 and water-absorbent fibers 6 woven into the main portion 4 along a predetermined direction.

[0015] (Main part 4) The main part 4 may be a woven or nonwoven fabric made of synthetic resin. The material of the main part 4 may be a polyolefin such as polypropylene or polyethylene, or a polyester. The main part 4 is preferably formed as a geotextile, which can reduce damage when installing the transpiration-promoting sheet 2 and facilitate construction.

[0016] (Textile 6) It is preferable that the fibers 6 have hydrophilicity in addition to water absorption. Examples of the material of the fibers 6 include nylon, polyester, polyolefin, and cellulose ester.

[0017] The fibers 6 are woven into the main part 4 along a predetermined direction (the direction indicated by the arrow X in FIG. 3). As shown in FIG. 1, the fibers 6 form a plurality of lines extending in the X direction at intervals in the direction indicated by the arrow Y in FIG. 1 (the up-down direction in FIG. 1, a direction perpendicular to the X direction). Each of the multiple lines formed by the fibers 6 (a single line) is made up of a large number of fibers 6. The multiple lines formed by the fibers 6 are parallel to one another.

[0018] In the transpiration-promoting sheet 2, moisture absorbed by the fibers 6 is guided in a predetermined direction (X direction) and is evaporated from the exposed portion. Specifically, in the transpiration-promoting sheet 2, moisture in a target area such as soil or a pond is absorbed by capillary action into gaps between the fibers 6 in a portion positioned within the target area, and the absorbed moisture is guided in the X direction to be evaporated from a portion positioned outside the target area (exposed portion). Therefore, the transpiration-promoting sheet 2 can efficiently and easily transpire moisture present in a target area such as soil or a pond.

[0019] The fibers 6 may have one or more linear recesses (not shown) extending in the longitudinal direction (X direction) of the fibers 6. In this case, the evaporation-promoting sheet 2 can absorb moisture in a target area into the linear recesses of each fiber 6 by capillary action and transport the moisture in a predetermined direction (X direction) via the linear recesses of each fiber 6.

[0020] As described above, in the transpiration-promoting sheet 2, the fibers 6 absorb moisture within the target area by capillary action, so that not only can they absorb moisture above the transpiration-promoting sheet 2, but they can also draw up moisture from below the transpiration-promoting sheet 2 against gravity.

[0021] Next, the evaporation method will be described with reference to FIG. 2 and FIG.

[0022] (If the target area is soil S) 2 shows an example of the case where moisture present in soil S as a target area is allowed to transpire. In this case, a hole (not shown) for installing the transpiration-promotion sheet 2 is dug to an appropriate depth, and then the lower portion 2a of the transpiration-promotion sheet 2 is positioned in the hole, and the hole is backfilled. When backfilling the hole, the upper portion 2b of the transpiration-promotion sheet 2 is exposed from the soil S. In other words, the lower portion 2a of the transpiration-promotion sheet 2 is positioned inside the soil S as the target area, and the upper portion 2b of the transpiration-promotion sheet 2 is positioned outside the soil S as the target area.

[0023] When burying a portion of the transpiration promotion sheet 2 in the soil S in this manner, it is preferable to align the longitudinal direction of the fibers 6 (the X direction in Fig. 1) with the vertical direction indicated by the arrow A in Fig. 2. However, as long as a portion of the line formed by a large number of fibers 6 is located inside the soil S and the other portion of the line is located outside the soil S, it is not necessary for the longitudinal direction of the fibers 6 to be strictly aligned in the vertical direction.

[0024] 2, the lower portion 2a of the transpiration-promoting sheet 2 is placed inside the soil S at an angle of 45° with respect to the vertical direction. However, the angle θ of the lower portion 2a of the transpiration-promoting sheet 2 with respect to the vertical direction is not limited to 45° and may be any angle. For example, the lower portion 2a of the transpiration-promoting sheet 2 may be placed so as to be aligned with the vertical direction (θ=0°).

[0025] As shown in Fig. 2, it is preferable to provide a support means for supporting the upper portion 2b of the transpiration-promoting sheet 2. As the support means, for example, a plurality of supports 8 arranged at intervals in a direction perpendicular to the paper surface in Fig. 2 can be used. However, the support means is not limited to supports 8. Any support means may be used as long as it can support the upper portion 2b of the transpiration-promoting sheet 2 and separate the upper portion 2b from the ground.

[0026] If a support means is not provided and the upper portion 2b of the transpiration-promoting sheet 2 is not supported, the upper portion 2b of the transpiration-promoting sheet 2 will sag and cover the ground, causing the upper portion 2b to block transpiration from the ground near the transpiration-promoting sheet 2. In this regard, by providing a support means and separating the upper portion 2b from the ground, it is possible to prevent the upper portion 2b of the transpiration-promoting sheet 2 from blocking transpiration from the ground.

[0027] If the upper portion 2b has enough strength to be able to stand on its own without touching the ground, a support means may not be provided. For example, if the main portion 4 of the transpiration-promoting sheet 2 is formed as a geotextile and the upper portion 2b exposed from the soil S does not come into contact with the ground, a support means may not be provided even if the upper portion 2b sags slightly.

[0028] By placing the transpiration promotion sheet 2 in the soil S in this manner, moisture present in the soil S is absorbed by the fibers 6 in the lower portion 2a, and the absorbed moisture is guided to the upper portion 2b and transpires from the upper portion 2b exposed from the soil S. Therefore, according to the illustrated embodiment, moisture present in the soil S (target area) can be efficiently and simply transpired.

[0029] (If the target area is Pond P) 3 shows an example of evaporating water present in a pond P as a target area. In this case, by hanging an evaporative sheet 2 on a bar 10 extending in a direction perpendicular to the paper surface in FIG. 3, a lower portion 2a can be positioned inside the pond P and an upper portion 2b can be positioned outside the pond P.

[0030] In this case, too, it is preferable to align the longitudinal direction of the fibers 6 (the X direction in Fig. 1) with the vertical direction indicated by the arrow A in Fig. 3. However, it is sufficient that a part of the line formed by a large number of fibers 6 is located inside the pond P, and the other part of the line is located outside the soil S.

[0031] 3, the bar 10 serves as a support means for supporting the upper portion 2b of the transpiration-promoting sheet 2. When the target area is a pond P, similarly to when the target area is soil S, the support means may be any means capable of supporting the upper portion 2b of the transpiration-promoting sheet 2 and separating the upper portion 2b from the water surface of the pond P (the upper surface of the target area).

[0032] Furthermore, if the upper portion 2b has sufficient strength to be able to stand on its own without coming into contact with the water surface of the pond P, it is not necessary to provide the bar 10 as a support means for supporting the upper portion 2b. If no support means for supporting the upper portion 2b is provided, a fixing means (not shown) for fixing the lower portion 2a can be provided inside the pond P or the like to position the transpiration promotion sheet 2 at a required position.

[0033] By installing the transpiration promotion sheet 2 in the pond P in this manner, moisture present in the pond P is absorbed by the fibers 6 in the lower portion 2a, and the absorbed moisture is guided to the upper portion 2b and transpires from the upper portion 2b exposed from the pond P. Therefore, according to the illustrated embodiment, moisture present in the pond P (target area) can be efficiently and simply transpired. [Explanation of symbols]

[0034] 2: Transpiration promotion sheet 2a: Lower part 2b: Upper part 4: Main part 6: Fiber 8: Prop 10: Bar S: Soil P: Pond

Claims

1. A method for evaporating water present in a target area, such as soil or a pond, comprising the steps of: A lower portion of a transpiration-promoting sheet in which absorbent fibers are woven in a predetermined direction is positioned inside the target area, and an upper portion of the transpiration-promoting sheet is positioned outside the target area; An evaporation method in which moisture present in the target area is absorbed by the lower part, and the moisture absorbed by the lower part is guided to the upper part and evaporated from the upper part.

2. The evaporation method according to claim 1 , wherein the fibers are woven into the evaporation promotion sheet so as to form a plurality of lines extending in the predetermined direction at intervals in a direction perpendicular to the predetermined direction.

3. The evaporation method according to claim 1 , wherein the fiber has one or more linear recesses formed therein and extending in the predetermined direction.

4. The transpiration method according to claim 1 , wherein a main portion of the transpiration promotion sheet is formed as a geotextile, and the fibers are woven into the main portion.

5. The evaporation method according to claim 1 , further comprising a support means for supporting the upper portion of the evaporation promotion sheet.

6. A transpiration promotion sheet that promotes the transpiration of water present in a target area such as soil or a pond, A transpiration-promoting sheet in which absorbent fibers are woven in a specific direction.

7. The transpiration promoting sheet according to claim 6 , wherein the fibers are woven to form a plurality of lines extending in the predetermined direction at intervals in a direction perpendicular to the predetermined direction.

8. The transpiration promoting sheet according to claim 6 , wherein the fibers have one or more linear recesses extending in the predetermined direction.

9. The transpiration-promoting sheet according to claim 6 , wherein the main portion is formed as a geotextile, and the fibers are woven into the main portion.

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