JP6979642B2 - How to expand the capacity of drainage ditches - Google Patents

Description

The present invention relates to a drainage ditch provided on the side of a road, a railroad track, a small step on a slope, etc., and quickly and easily increases the cross-sectional area of the drainage ditch to cope with an increase in the amount of water due to torrential rain or the like. It relates to a method of expanding the capacity of a drainage ditch that can be used.

Conventionally, drainage ditches provided on the side of roads and small steps on the slopes beside railroad tracks are U-shaped blocks to guide rainwater to rivers and sewage without overflowing to roads and railroad tracks. Was placed side by side in the soil with the open side facing up to form a continuous drainage ditch.

By the way, heavy rains caused by typhoons and heavy rains that occur frequently in recent years may cause more rain than expected per unit time in all areas, and if more rainwater than can be drained in the drainage ditch flows into the drainage ditch, There was a problem that it overflowed from the drainage ditch and the roads, railroad tracks, slopes, etc. collapsed.

For water that overflows from the drainage ditch due to rainwater exceeding the design value, generally, the existing drainage ditch is dug up and removed, and a new drainage ditch that satisfies the design drainage capacity is replaced. Alternatively, there was a method of installing an emergency waterproof retaining wall in front of a road or a railroad track (see, for example, Patent Document 1).

Alternatively, there is also a method of extending the wall upward by providing a concrete wall on the upper side of the side wall of the U-shaped block constituting the drainage ditch to increase the running water capacity of the drainage ditch itself. For example, a concrete block can be used. There were methods such as stacking in the vertical direction and fixing these blocks with concrete, or creating a formwork to be a wall and then placing concrete to make a concrete wall.

Japanese Unexamined Patent Publication No. 2003-214049

However, installing an emergency waterproof retaining wall as in Patent Document 1 involves a large amount of time and labor because the structure of the retaining wall is heavy and it is difficult to introduce heavy machinery for the installation work. was there.

In addition, even if the wall surface of the U-shaped block for the drainage ditch is extended and expanded upward, it takes time and effort to stack concrete blocks and to install and remove concrete formwork, and then concrete is struck. There is a problem that it takes a long time from the installation to the solidification of concrete, and this method also requires a lot of time and labor.

The method of digging up and removing the existing drainage ditch and replacing it with a new large drainage ditch that satisfies the designed drainage capacity is to dig up the soil when removing the existing drainage ditch, which weakens the surrounding soil. There was a problem.

The present invention provides a method for solving the above-mentioned problems and quickly and easily expanding the capacity of a drainage ditch without weakening the soil around the drainage ditch.

In order to solve the above problems, the invention of claim 1 is
(1) A process of preparing a plurality of plate-shaped bodies composed of a substantially rectangular main surface and a locking piece that can be attached to the main surface and can be fixed to the ground.
(2) A process of laying a long tape-shaped sealing material on the upper part of the inner wall surface of the drainage ditch along the length direction of the drainage ditch.
(3) The main surface of the plate-shaped body is superposed on the sealing material on the inner wall surface of the drainage ditch, and the locking piece of the plate-shaped body is placed on the ground on the side surface of the drainage ditch and fixed, and the plurality of plate-shaped bodies are fixed. This is a method for expanding the capacity of a drainage ditch, which comprises a process of arranging and repeating the steps side by side.

Further, the invention of claim 2 is
(1) A process of preparing a plurality of plate-shaped bodies provided with locking pieces that can be fixed to the ground from the lower end of a substantially rectangular main surface.
(2) A process of arranging and fixing a plurality of plate-like bodies along the length direction of the drainage ditch on the sealed concrete on the side of the drainage ditch.
(3) A step of attaching a long tape-shaped sealing material on the boundary between the lower side of the main surface of the plate-shaped body and the sealing concrete.
It is a method of expanding the capacity of a drainage ditch, which is characterized by the above.

Further, the invention of claim 3 is
(1) A step of preparing a water-curable fabric covered with a flexible fabric and impregnated with a water-curable material inside.
(2) The process of arranging the tsuitates on the ground on the side of the drainage ditch at appropriate intervals.
(3) A process in which a water-curable fabric is erected along a tsuitate and the lower part is laid on the ground in the direction opposite to the tsuitate to form an L-shaped cross section and fixed side by side along the length of the drainage ditch.
(4) A step of curing a water-curable fabric with water to form a complex having an L-shaped cross section.
It is a method of expanding the capacity of a drainage ditch, which is characterized by the above.

Further, the invention of claim 4 is
(1) The process of arranging sandbags filled with sand etc. along the drainage ditch on the sealed concrete beside the drainage ditch.
(2) A step of continuously covering the sandbag from the upper part of the drainage ditch with a water-curable cloth covered with a flexible cloth and impregnated with a water-curable material (3) Fixing the sandbag and the water-curable cloth. Process,
(4) A process of impregnating a water-curable fabric with water and curing it.
It is a method of expanding the capacity of a drainage ditch, which is characterized by the above.

Further, in the invention of claim 5, in the method for expanding the capacity of a drainage groove according to any one of claims 1 to 4, after these steps, a step of applying a waterproof coating to a water passage cross section is performed. It is a method of expanding the capacity of the drainage ditch, which is characterized by the addition.

As described above, according to the inventions of claim 1 and claim 2, the surrounding soil is fragile because the area around the drainage ditch is not dug up in the work of expanding the capacity of the drainage ditch due to the increase in the amount of water due to torrential rain or the like. Since a light plate-shaped body can be used without using a heavy concrete block or the like, the tools can be easily moved and installed at the installation location.

In addition, compared to the conventional example in which concrete is placed in the formwork, the time to complete can be shortened because there is no construction of the formwork or concrete.

Next, according to the invention of claim 3, it is possible to form a strong concrete or mortar wall, and when installing the heavy concrete block as in the case of creating a conventional concrete wall. There is no need to carry and stack concrete, and there is no need to create a concrete leak-free formwork like making concrete with a formwork. And you can get ready in a short time.

In addition, since the composite that is solidified by sprinkling water on the water-curable fabric has an L-shaped cross section, if it is installed with the horizontal part below the L-shape inside and the drainage groove sandwiched between them, the part above the drainage groove. The width of the water flow is widened, the water capacity is improved for the height, and the horizontal part below the L-shape is also hardened with concrete to prevent water from passing through, so the soil is exposed on both sides. Even if it is a drainage ditch, it can be constructed as it is.

Furthermore, since the water-curable fabric is flexible, the water-curable fabric adheres to the ground even if the drainage ditch itself is curved or the circumference of the drainage ditch is uneven and uneven or uneven. It can be constructed by letting it work.

Next, according to the invention of claim 4, in the method of stacking sandbags on the side of the drainage ditch, since the sandbags have poor weather resistance and are difficult to install for a long period of time, the sandbags are water-curable around the sandbags. Since the water-curable fabric is hardened by covering it with a cloth and then sprinkling water, the surface of the sandbag is hardened with a hard material to ensure weather resistance. In addition, it is not necessary to create concrete using a formwork, or it is not necessary to stack concrete blocks exactly on top of each other as in the case of stacking concrete blocks, and the capacity of the drainage ditch can be easily expanded.

In the method for expanding the capacity of the drainage ditch according to the above claims 1 to 4, usually, the existing drainage ditch is dug up and removed, and a new large drainage ditch that satisfies the designed drainage capacity is replaced, or drainage. It is necessary to raise both sides of the ditch, but if one side of the drainage ditch is a slope or a concrete wall, the construction of the present invention is performed only on the slope of the drainage ditch or the side surface opposite to the concrete wall surface. Just by doing the method, the drainage capacity can be increased without digging up the area around the drainage ditch.

It is sectional drawing of the drainage ditch. It is sectional drawing which shows 1st Embodiment. It is sectional drawing which shows 1st Embodiment. It is sectional drawing which shows 1st Embodiment. It is sectional drawing which shows 1st Embodiment. It is sectional drawing which shows 1st Embodiment. It is sectional drawing which shows the 2nd Embodiment. It is sectional drawing which shows the 2nd Embodiment. It is sectional drawing which shows the modification of 2nd Embodiment. It is sectional drawing which shows the 3rd Embodiment. It is sectional drawing which shows the 3rd Embodiment. It is sectional drawing which shows the 3rd Embodiment. It is sectional drawing which shows the 3rd Embodiment. It is sectional drawing which shows the modification of 3rd Embodiment. It is sectional drawing which shows the other modification of the 3rd Embodiment. It is sectional drawing which shows the 4th Embodiment. It is sectional drawing which shows the 4th Embodiment. It is sectional drawing which shows the 4th Embodiment. It is sectional drawing which shows the 4th Embodiment.

[First Embodiment]
Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 to 6.
FIG. 1 is a cross-sectional view of the ground near the drainage ditch 1, in which a drainage ditch 1 having a U o'clock cross section is buried in the soil 2 which is horizontal in a stepped manner on a slope. The soil surface on the side surface is covered with a sealed concrete 3 having a certain width and a thickness of about 5 to 10 cm from the drainage ditch 1. It should be noted that there is no such seal concrete, and it may be due to soil 2.

The size of the drainage ditch 1 is, for example, about 240 mm in width and about 240 mm in depth, but the size of the drainage ditch to which the present invention is applied is not limited, and can be applied to a drainage ditch larger than this.

Next, the plate-shaped body 4 shown in FIG. 1 is composed of a substantially rectangular main surface 5 and a locking piece 6 attached to the main surface 5 with fasteners such as bolts, and the main surface 5 is substantially lateral 2. It is a plate with a size of ~ 3m x length 35cm and a thickness of about 2mm, is made of metal, synthetic resin, or a composite material of these, and is not too heavy in consideration of workability. Anything that is durable will do. Examples thereof include galvanized steel sheets, stainless steel sheets and FRP plates.

Further, the locking piece 6 is a triangular combination of L-shaped steel or the like by bolt fixing or welding, and is a member for connecting the main surface 5 and the anchor 8 installed on the soil 2. The installation interval is not particularly limited, but an interval of approximately 1 to 2 m is desirable in consideration of the dimensions of the main surface 5.

The dimensions of the main surface 5 of the plate-shaped body 4, the mounting position and dimensions of the locking piece 6, and the like can be appropriately changed according to the size of the drainage ditch 1 to be used and the surrounding environment. In the figure, reference numeral 10 denotes a separate plate-shaped body connecting steel material for horizontally connecting the tops of adjacent plate-shaped bodies 4.

The plate-shaped body 4 is placed in the drainage ditch 1, but before that, a long tape-shaped sealing material 7 is previously placed on the upper side of the inner wall surface of the drainage ditch 1 or on the contact surface side of the drainage ditch 1 at the lower end of the main surface 5. It is laid along the length direction of the drainage ditch 1.

The long tape-shaped sealing material 7 is in the form of a long sheet having a predetermined width, and is such that one side adhesive surface is adhered to the wall surface at the lower end of the drainage groove 1 or the main surface 5, and is in the form of a liquid. The work can be done more easily and efficiently than applying it directly to the wall surface. The material of the sealing material 7 is not particularly limited, but in short, any material may be used as long as it closes the gap between the wall surface of the drainage groove 1 and the main surface 5 of the plate-shaped body 4 to maintain watertightness and adhesiveness.

Next, as shown in FIG. 3, the anchor 8 threaded at the top is driven into the soil 2, and the height is adjusted by the adjusting nut 8-1 so that the locking piece 6 has a predetermined height. The stop piece 6 is installed on the anchor 8, the horizontal position of the locking piece 6 is adjusted, and then the stop piece 6 is fixed by the fastening nut 8-2.

After that, as shown in FIGS. 3 to 4, the lower end portion of the main surface 5 of the plate-shaped body 4 is placed on the sealing material 7 on the inner wall surface of the drainage groove 1, and the main surface 5 and the locking piece 6 are bolted or the like. Fix it.

It should be noted that the adjacent portions of the main surface 5 are overlapped a little (several cm), or if there is a slight gap, it is appropriately filled with a sealing material.

Further, it is desirable to apply a waterproof coating 23 so as to cover the plate-shaped body 4, the drainage ditch 1, and the sealed concrete 3 which are the drainage cross sections.

By arranging and fixing the plate-shaped body 4 on one side surface of the drainage ditch 1 in this way, as shown in FIG. 5, even if water W exceeding the capacity of the drainage ditch 1 flows due to torrential rain or the like, the slope surface. The water capacity can be secured up to the upper end portion of the plate-shaped body 4 at the portion sandwiched between the upper inclined surface.

As shown in FIG. 6, a screw hole or a locking portion (not shown) may be provided at the top of the anchor 8 so that the pole 9 can be erected. This pole 9 can be used when stretching a rope for safety measures.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 7 to 9.
The plate-shaped body 4 in the second embodiment is composed of a substantially rectangular main surface 5 and a locking piece 6, and the materials of the main surface 5 and the locking piece 6 are the same as those in the first embodiment. The explanation is omitted.

Since the dimension of the main surface 5 is a dimension that increases the capacity from the upper end of the drainage ditch 1 as it is in the vertical dimension, when the same water capacity as that of the first embodiment is secured, the main of the first embodiment is used. It may be smaller than the size of the surface 5, and has a size of about 2 to 3 m in width × 15 to 20 cm in length and a thickness of about 2 mm in a plate shape.

Further, in this embodiment, since the main surface 5 is installed not on the side surface of the drainage ditch 1 but on the upper part of the sealed concrete 3, the point that the heights of the locking piece 6 and the main surface 5 are almost the same is the first embodiment. It is different from the structure of the plate-shaped body 4 of.

As shown in FIG. 7, the anchor 8 threaded at the top is driven into the soil 2, the plate-shaped body 4 is installed on the anchor 8, and the anchor 8 is fixed with the fastening nut 8-2. It should be noted that the pole 9 may be erected as shown in FIG. 6 of the first embodiment.

Next, a long tape-shaped sealing material 7 is attached on the boundary between the plate-shaped body 4 and the sealing concrete 3 along the length direction of the drainage groove 1 so as not to have a gap. Further, it is desirable to apply a waterproof coating 23 so as to cover the plate-shaped body 4, the drainage ditch 1, and the sealed concrete 3 which are the drainage cross sections.

In FIG. 8 of this second embodiment, since the plate-shaped body 4 can be installed away from the side surface of the drainage ditch 1, the distance from the inclined slope (right side in the drawing) becomes large, and water flows in this portion. The capacity is increasing, and it becomes possible to flow a large amount of water for the height dimension of the vertical portion of the plate-shaped body 4.

FIG. 9 is a modification of the second embodiment for increasing the capacity of the drainage ditch 1 provided in a place where the soil 2 is a flat surface without an inclined surface, and is a modification of both sides of the drainage ditch 1. By installing the plate-shaped body 4 in the water capacity, it is possible to increase the water capacity at the portion sandwiched between the two plate-shaped bodies 4.

The method of installing each plate-shaped body 4 on both sides of the drainage ditch 1, the method of installing the long tape-shaped sealing material 7, the waterproof coating 23, and the optional pole 9 are based on FIGS. 1 to 8. It is the same as the one described in the above description, and detailed description thereof will be omitted.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIGS. 10 to 15.
First, as shown in FIG. 10, the tsuitates 11 are arranged and fixed along the side surface of the drainage ditch 1.

In this embodiment, the tsuitate 11 is provided at the lower end of the angle steel 12 with a horizontal piece protruding to one side for vertically standing the angle steel 12, and the material of the angle steel 12 has outdoor durability. As long as it is made of steel, it is not particularly limited to that of steel, and it may be one that is permeated with water, so that various materials such as metal, synthetic resin, and wood material can be used.

The tsuitate 11 has a shape-retaining property and plays a role of erecting a flexible hydraulic fabric 14 described later, and is arranged on the side surface of the drainage ditch 1 at intervals of about 1 m to 2 m. However, it does not necessarily have to be the angle steel 12 as shown in the figure, and as long as the hydraulic fabric 14 can be leaned against it, its shape does not matter, and its installation interval is also limited. No. In the figure, 13 is a separate angle steel (or steel plate) for horizontally connecting the tops of adjacent angle steels 12.

Further, the height dimension of the countersunk 11 is not particularly limited depending on the height of the extension portion in the upward direction of the drainage ditch to be formed, but is about 10 to 30 cm, and the width in the lateral direction is not particularly limited.

As shown in FIG. 10, as shown in FIG. 10, the anchor 8 is fixed to the lower horizontal member by driving the anchor 8 from the upper surface through the seal concrete 3 until it reaches the soil 2.

Next, a rectangular hydraulic fabric 14 covered with a flexible fabric and impregnated with a water-curable material is prepared, and as shown in FIG. 11, the hydraulic fabric 14 is used as the angle steel 12 of the tsuitate 11. A vertical part is formed by leaning against it, and the remaining part is placed along the ground on the opposite side of the sill 11 and fixed with an anchor pin 17 as necessary to form a horizontal part, which is viewed from the side. When it is used, it has an L-shaped cross section.

The hydraulic fabric 14 hardens itself once it contains water and keeps its shape as it is. As shown in FIG. 12, the hydraulic fabric 14 is sprinkled with water 15 to the hydraulic fabric 14. Is cured to form a complex 16.

In this third embodiment, the composite 16 cured into an L-shaped cross section by sprinkling water 15 on the hydraulic fabric 14 is installed so that the horizontal portion is continuous with the drainage groove 1 as shown in the figure. Even if there is no seal concrete 3 next to 1, the composite 16 does not allow water to pass through, so that water does not seep into the soil 2.

Further, as shown in FIG. 13, it is desirable to apply a waterproof coating 23 so as to cover the complex 16, the drainage ditch 1, and the sealed concrete 3 which are the drainage cross sections.

Since the complex 16 has a horizontal portion, the vertical portion of the complex 16 is installed away from the side surface of the drainage groove 1, the distance from the inclined slope (right side in the figure) becomes large, and water W flows in this portion. The capacity is increasing, and it becomes possible to flow a large amount of water for the height dimension of the vertical portion of the complex 16. It should be noted that the pole 9 may be erected arbitrarily as shown in FIG. 6 of the first embodiment and FIGS. 8 and 9 of the second embodiment.

FIG. 14 is a modified example showing a capacity expansion method in a place where a slope is adjacent to the drainage ditch 1 by using the water-hardening cloth 14 used in the second embodiment, and as shown in the figure, at the time of installation. Due to the flexibility of the water-hard cloth 14, the soil 2 adheres to the shape of the soil 2 around the drainage ditch 1, so that the construction can be performed even if the soil 2 is an inclined portion.

In the figure, on the valley side of the slope with respect to the drainage ditch 1, the strut 11 is erected using the anchor 8 according to the procedure shown in FIGS. 10 to 13, and then the water-hard cloth 14 is installed to drain the water. On the mountain side of the slope with respect to the groove 1, the water-hard cloth 14 is laid and fixed as it is along the soil on the slope with an anchor pin 17 or the like, and the water-hard cloth 14 is hardened by watering to form a composite 16, which is necessary. Accordingly, a waterproof coating 23 is applied so as to cover the composite 16 and the drainage ditch 1 which are the drainage cross sections.

Of course, due to the flexibility of the hydraulic fabric 14, it is possible to install the hydraulic fabric 14 according to the shape of the drainage groove 1 even if it is a curved portion, in addition to the inclined portion as shown in FIG. The complex 16 can be freely installed even in such a terrain.

FIG. 15 is a modification of the third embodiment for increasing the capacity of the drainage ditch 1 provided in a place where the soil 2 is a flat surface without an inclined surface, and is a modification of both sides of the drainage ditch 1. By installing the tsuitate 11 and the complex 16 in the water capacity, it is possible to increase the water capacity in the portion sandwiched between the two complexes 16.

The method of installing the respective counters 11 and the composite 16 on both sides of the drainage ditch 1 and the method of arbitrarily installing the pole 9 are the same as those described with reference to FIGS. 10 to 13, and are detailed. The explanation is omitted.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIGS. 16 and 19.
First, as shown in FIG. 16, a large number of sandbags 21 are prepared, and the sandbags 21 are placed on the sealed concrete 3 along the drainage ditch 1, but before that, a long sandbag 21 is placed on the inner wall surface of the drainage ditch 1 in advance. A tape-shaped sealing material 7 is laid along the length direction of the drainage ditch 1.

As shown in FIG. 17, after arranging a plurality of sandbags 21 on the side of the drainage ditch 1 without gaps so as to come into contact with the long tape-shaped sealing material 7 provided in advance, the water-curable fabric 14 is placed. It is laid so as to cover from the drainage ditch 1 side to the sealing material 17, the sandbag 21, and the sealing concrete 3.

The water-curable fabric 14 is covered with a flexible fabric and impregnated with a water-curable material, and is water-curable as used in the third embodiment shown in FIGS. 10 to 15 above. It may be the same as the cloth 14, but it is preferably relatively thinner and more flexible than the one used in the third embodiment because it covers the sandbag 21 and the ground having an irregular surface.

Further, the sandbag 21 may be a normal sandbag, but if a sandbag with a reinforced surrounding cloth (for example, a shrunk sandbag (trade name)) is used, the durability after installation can be improved.

After that, each sandbag 21 is fixed by driving an anchor 8, the hydraulic fabric 14 is fixed by an anchor pin 22, and water is sprayed onto the water curable fabric 14 on the surface to obtain a hydraulic material. Solidify. If necessary, a waterproof coating 23 is applied so as to cover the sandbag 21, the sealing material 17, the drainage ditch 1, and the sealing concrete 3, which are the cross sections of the drainage.

In this way, the water capacity can be increased by a simple operation such as arranging sandbags and covering them with hydraulic fabric, and the surface of the hydraulic fabric 14 on which the hydraulic material is cured has improved durability against water. , It can be installed for a longer period of time than a normal stack of sandbags.

FIG. 18 shows that the pole 9 is erected on the anchor 8 at an appropriate interval (1 to 2 m) with respect to the anchor 8 for fixing the sandbag 21, and is used when a rope for safety measures is stretched. Here is an example. The method of installing the pole 9 is the same as that described with reference to FIGS. 8, 9, 13, and 15, and detailed description thereof will be omitted.

FIG. 19 shows an example in which the water capacity is increased by installing the sandbag 21 at a position slightly away from the side of the drainage ditch 1 from the examples of FIGS. 16 to 18, and the sandbag 21 is slightly separated from the drainage ditch 1. After installing on the seal concrete 3 at a distant position, a long tape-shaped seal material 7 is attached on the boundary between the sandbag 21 and the seal concrete 3 along the length direction of the drainage ditch 1 so as not to leave a gap. ..

Further, after laying the water-curable fabric 14 in order from the drainage ditch 1 side so as to cover the drainage ditch 1, the seal concrete 3, the seal material 17, the sandbag 21, and the seal concrete 3, the sandbag 21 is an anchor 8. The water-curable fabric 14 is fixed by the anchor pins 22 respectively.

After that, the water-hard cloth 14 is solidified by sprinkling water or the like, and further, the inner wall of the drainage groove 1 is included from above the hardened water-hard cloth 14 so as to cover the sandbag 21, the sealing material 7, and the sealing concrete 3 which are the drainage cross sections. It is desirable to apply waterproof coating 23.

1 Drain groove 2 Soil 3 Sealed concrete 4 Plate 5 Main surface 6 Locking piece 7 Seal material 8 Anchor 8-1 Adjustment nut 8-2 Fastening nut 9 Pole 10 Plate connecting steel 11 Strut 12 Angle steel 13 Steel plate 14 Water-hard cloth 15 Watering 16 Composite 17 Anchor pin 21 Sandbag 22 Anchor pin 23 Waterproof coating W Water

Claims (5)

(1) A process of preparing a plurality of plate-shaped bodies composed of a substantially rectangular main surface and a locking piece that can be attached to the main surface and can be fixed to the ground.
(2) A process of laying a long tape-shaped sealing material on the upper part of the inner wall surface of the drainage ditch along the length direction of the drainage ditch.
(3) The main surface of the plate-shaped body is superposed on the sealing material on the inner wall surface of the drainage ditch, and the locking piece of the plate-shaped body is placed on the ground on the side surface of the drainage ditch and fixed, and the plurality of plate-shaped bodies are fixed. The process of arranging and repeating side by side,
A method of expanding the capacity of a drainage ditch, which is characterized by being composed of. (1) A process of preparing a plurality of plate-shaped bodies provided with locking pieces that can be fixed to the ground from the lower end of a substantially rectangular main surface.
(2) A process of arranging and fixing a plurality of plate-like bodies along the length direction of the drainage ditch on the sealed concrete on the side of the drainage ditch.
(3) A step of attaching a long tape-shaped sealing material on the boundary between the lower side of the main surface of the plate-shaped body and the sealing concrete.
A method of expanding the capacity of a drainage ditch, which is characterized by being composed of. (1) A step of preparing a water-curable fabric covered with a flexible fabric and impregnated with a water-curable material inside.
(2) The process of arranging the tsuitates on the ground on the side of the drainage ditch at appropriate intervals.
(3) A process in which a water-curable fabric is erected along a tsuitate and the lower part is laid on the ground in the direction opposite to the tsuitate to form an L-shaped cross section and fixed side by side along the length of the drainage ditch.
(4) A step of curing a water-curable fabric with water to form a complex having an L-shaped cross section.
A method of expanding the capacity of a drainage ditch, which is characterized by being composed of. (1) The process of arranging sandbags filled with sand etc. along the drainage ditch on the sealed concrete beside the drainage ditch.
(2) A step of continuously covering the sandbag from the upper part of the drainage ditch with a water-curable cloth covered with a flexible cloth and impregnated with a water-curable material (3) Fixing the sandbag and the water-curable cloth. Process,
(4) A process of impregnating a water-curable fabric with water and curing it.
A method of expanding the capacity of a drainage ditch, which is characterized by being composed of. The method for expanding the capacity of a drainage ditch according to any one of claims 1 to 4, wherein a step of applying a waterproof coating to a water passage cross section is added after the above steps.

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