JP4420536B2 - Osmotic box culvert, osmotic pipe rod and construction method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an osmotic box culvert having a function of draining running water in a pipe and allowing it to permeate into the ground, or to absorb underground water in the ground into the pipe, an osmotic pipe culvert, and a construction method thereof.
[0002]
[Prior art]
Penetration by allowing a large amount of rainwater to flow into the box culvert, etc., so that a portion of the water flowing in the pipe penetrates into the ground outside the pipe from the rainwater penetration hole formed in the side wall of the box culvert. An expression box culvert is known (for example, Japanese Utility Model Publication No. 64-42377).
Further, in order to allow a larger amount of rainwater to permeate quickly, a required number of long holes for rainwater penetration and a required number of perforated pipe insertion holes are formed in the side wall, and a long perforated pipe is provided in the perforated pipe insertion hole. An attached osmotic culvert is also known (Japanese Patent Laid-Open No. 8-184090).
[0003]
[Problems to be solved by the invention]
However, the above-described penetrating culvert has the following problems.
[0004]
To form a box culvert with a rainwater permeation hole, a long rainwater permeation hole, or a perforated pipe insertion hole (hereinafter referred to as a rainwater permeation hole, etc.) with precast concrete, mold design, production, and die removal during molding Etc., and the cost is high. In addition, the rainwater infiltration holes, etc., are formed at a fixed shape (level) of the side wall, and the running water in the pipe is simply permeated into the ground through the holes for rainwater infiltration. The adjustment of the flow rate and the adjustment of the infiltration amount are not considered. If the level and shape dimensions of the rainwater infiltration hole and the like are variously changed, a new mold must be designed and manufactured for each change, which is unrealistic.
[0005]
Regardless of whether the water level is normal or increased, water can freely enter and exit from the rainwater infiltration hole. Therefore, even if the water level in the pipe is low, if it is above the rainwater infiltration hole, etc., the water flow in the pipe will always permeate into the ground through the hole for rainwater infiltration, etc. A situation that cannot be ensured occurs. In addition, a large amount of permeated water softens the local ground and causes unequal settlement of pipes.
[0006]
Therefore, a first object of the present invention is to enable adjustment of the flow rate in the planned pipe and adjustment of the permeation amount, thereby reducing manufacturing effort and cost. The second purpose is to enable the pipe flow rate to be secured when the pipe water level is low. The third purpose is to enable time-differential drainage in response to changes in pipe flow rate, and to prevent local ground softening and uneven settlement of pipe dredging.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the following osmotic box culverts (1), (2) and (3), osmotic tubs (4) and (5), and the construction method (6) were created. However, the penetrating box culvert (2) is a reference example.
[0008]
(1) Precast concrete box culvert body with a fitting window penetrating through the side wall, and a fitting that is formed so as to be able to be fitted into the fitting window and has a water intake / exhaust port for allowing water to enter and exit. Osmotic box culvert with side walls.
(2) An osmotic box culvert in which an inlet / outlet for allowing water to enter and exit at least at the upper and lower levels of the side wall is formed, and a flow rate adjusting valve for ensuring the flow rate in the pipe is provided at the lowest level inlet / outlet.
(3) A box culvert body made of precast concrete with a fitting window penetrating through the side wall, and a fitting side wall formed so as to be fitted into the fitting window, and at least two levels above and below the fitting side wall. An osmotic box culvert in which a water intake / drain port is formed to allow water to flow in and out, and a flow rate adjusting valve is provided at the lowest level water intake / drain port to ensure the flow rate in the pipe.
[0009]
In the above (1) and (3), the following modes can be exemplified.
The material and manufacturing method of the fitting side wall are not particularly limited, but are preferably made of precast concrete in terms of strength and low cost.
The aspect in which the hole used as an inlet / outlet port was penetrated by the insertion side wall may be sufficient as an inlet / outlet port, and the aspect by which the recess used as an inlet / outlet port was formed in the outer periphery of an insertion side wall may be sufficient. In the latter case, at the time of fitting, an inlet / outlet is formed by the recess and the inner peripheral edge of the fitting window facing it.
[0010]
Although the insertion side wall may be one step, an embodiment in which it is divided into at least two upper and lower steps is preferable. Even with one stage, it is possible to adjust the flow rate in the planned pipe and adjust the amount of penetration by preparing fitting side walls with different levels and shape dimensions of the inlet and outlet, and fitting them appropriately. If it is possible to form a water inlet / outlet at each stage, it is easy to increase variations in the level and shape of the water inlet / outlet.
In this case, it is possible to adopt a mode in which a recess serving as the water intake / drainage port is formed at the lower edge of the relatively upper fitting side wall or the upper edge of the relatively lower fitting side wall. In this case, at the time of fitting, a suction / drainage port is formed by the recess and the lower edge or upper edge of the fitting side wall facing it.
[0011]
The shape of the water inlet / outlet by the recess is not particularly limited, and examples thereof include a horizontally long slit shape, a square hole, and a semi-round hole. Moreover, the shape of the water inlet / outlet port by the said hole is not specifically limited, A square hole, a round hole, a semicircle hole etc. can be illustrated.
[0012]
In the above (2) and (3), the following modes can be exemplified.
The flow regulating valve is preferably a valve that closes the water intake / drainage when the water level in the pipe is higher than the groundwater level in the ground and opens the water intake / drainage when the water level is low.
In this case, the structure of the flow rate adjusting valve is not particularly limited, and an example is an embodiment in which the valve is close to the inner wall surface at the periphery of the water inlet / outlet port, closes the water inlet / outlet port, and opens from the inner wall surface to open the water inlet / outlet port.
[0013]
(4) An osmotic tube constructed by connecting a plurality of the osmotic box culverts of the above (1), (2), (3) or each aspect.
(5) The above-described (1), (2), (3) or the penetrating type box culvert of each aspect is arranged in parallel to the outside of the side wall of the box culvert of the existing pipe rod, and is formed on the side wall adjacent to both box culverts. An osmotic tube constructed by expanding the cross-section of the existing tube by aligning the holes and communicating.
[0014]
In the above (4) and (5), it is preferable to form a drainable ground on the outer side of the side wall of the penetrating box culvert. The drainage ground is not particularly limited, but is preferably formed using a granular material such as crushed stone, crushed stone, and waste concrete glass, and more preferably formed using the granular material and a water purification material.
[0015]
Moreover, it is preferable to arrange | position the suction prevention material which has flow resistance and a filter effect | action at an inlet / outlet port.
Moreover, it is preferable to lay foundation concrete directly under the permeation type box culvert.
Furthermore, it is preferable to lay the foundation concrete directly under the permeation type box culvert or at the groove bottom of the site ground that protrudes directly under the penetration box culvert.
[0016]
(6) After carrying the box culvert body of the above (1), (3) or each aspect into the site, the side wall is fitted into the fitting window and assembled into the penetrating box culvert, and the penetrating box culvert is A method for constructing an osmotic tube fistula, wherein a plurality of pipes are connected.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
[First embodiment]
1 to 9 show an osmotic tube tube according to the first embodiment. As shown in FIG. 2, the osmotic box culvert 1 used for this osmotic pipe rod includes a bottom plate 3, a pair of side walls 4 and a top plate 5, and a fitting window 6 is provided through the side wall 4. A precast concrete box culvert body 2 and precast concrete fitting side walls 10 and 15 which can be fitted into the fitting window 6 and are divided into two upper and lower stages (or three or more stages). It has. The fitting window 6 is formed as a large square hole that leaves the four sides of the side wall 4 in a frame shape.
[0018]
At the bottom of the lower fitting side wall 10, for example, three round holes that form the lowest level water intake / discharge port 11 are formed side by side, and the flow rate adjustment valve for securing the flow rate in the pipe is formed in the water intake / discharge port 11. 12 is provided. The flow rate adjusting valve 12 is a flap type valve whose upper end is attached to the inner wall surface of the peripheral edge of the water inlet / outlet port 11 by a hinge (not shown), and when the water level in the pipe is higher than the groundwater level in the ground, the water inlet / outlet port 11. The inlet / outlet port 11 is closed in close contact with the inner wall surface of the periphery of the rim, and when it is low, the inlet / outlet port 11 is opened away from the inner wall surface.
[0019]
In the lower edge and the upper edge of the upper fitting side wall 15, horizontally long recesses serving as a medium level water intake / drain port 16 and an uppermost level water intake / drain port 17 are formed. That is, when the fitting side walls 10 and 15 are fitted into the fitting window 6, the medium-level water intake and discharge port 16 is formed by the recess at the lower edge of the fitting side wall 15 and the upper edge of the fitting side wall 10 facing it. The uppermost level water intake / discharge port 17 is formed by the recess at the upper edge of the insertion side wall 15 and the inner peripheral edge of the insertion window 6 facing it. Further, in this example, the uppermost intake / exhaust port 17 is set to have a larger mouth height and opening area than the medium level intake / exhaust port 16.
[0020]
Note that a modified example as shown in FIG. 3 or FIG. 4 can also be used as the permeation type box culvert 1.
The first modification shown in FIG. 3 does not employ the fitting window 6 and the fitting side walls 10 and 15, but directly adopts the lowest level water intake / drain port 11, the medium level water intake / drain port 16, and the uppermost side wall 4. The level water intake / drain port 17 is provided so that each level water intake / drain port has, for example, three round holes.
[0021]
The second modified example shown in FIG. 4 is a modified version of the bottom plate 3 whose upper surface was flat in the example of FIG. 2, and (a) is an example in which the upper surface of the bottom plate 3 is formed in a circular arc shape with a low center, (b ) Is an example in which the upper surface of the bottom plate 3 has a low slope at the center and a groove 7 is formed in the center, and (c) is a bottom plate 3 in which the groove 7 is formed in the center of the upper surface of the bottom plate 3 and thick on both sides. In this example, a hollow portion 8 (which may be clogged with foamed resin or the like) is formed. Mud or the like is likely to accumulate in the central low place or the groove 7, but the sediment deposited in the low place or the groove 7 has an advantage that it can be cleaned very easily.
[0022]
Now, an osmotic tube culvert constructed using the osmotic box culvert 1 will be described together with a construction method (construction procedure).
<Step 1>
The local ground 20 is excavated into a groove shape in which the width of the groove bottom 23 is wider than the width of the box culvert 1, and the groove inner side surface 21 is formed as an upwardly-sloped slope. 22 is laid. As the sucking prevention material 22, for example, trade name “Toughnel EX” of Mitsui Ishika Co., Ltd. can be used.
[0023]
<Step 2>
The basic crushed stone 24, the basic concrete 25, and the floor mortar 26 are laid in order on the groove bottom 23 leveled substantially flat. After the box culvert body 2 is carried out of the groove on the site, the fitting side walls 10 and 15 are fitted into the fitting window 6 to assemble the penetrating box culvert 1. Since the joints of the fitting side walls 10 and 15 have an auxiliary water permeability function, it is not necessary to perform a special water stop treatment (of course, it may be performed). In addition, the flow regulating valve 12 is attached to the insertion side wall 10 before this assembly (in a factory or the field). The assembled osmotic box culvert 1 is placed on the mortar 26.
[0024]
<Step 3>
A suction prevention member 27 (filter) having a flow resistance and a filter action is disposed on each of the water intake and discharge ports 11, 16, and 17 and their peripheral portions on the outer surfaces of the side wall 4 and the fitted side walls 10 and 15. As the sucking prevention material 27, for example, the above-mentioned “Toughnel EX” can be used. On both sides of the permeation type box culvert 1 on the foundation concrete 25, for example, a drainage ground 30 is formed by alternately laying back crushed stones 28 and water purification materials 29. As the water purification material 29, for example, the product name “Bioloop” of Kureha Gosei Co., Ltd. can be used. A suction preventing material 31 is laid on the drainage ground 30. As the sucking prevention material 31, for example, the above-mentioned “Toughnel EX” can be used.
[0025]
<Step 4>
The excavated soil 32 is backfilled on the osmotic box culvert 1 and the evacuation preventing material 31, and the flowing water in the box culvert 1 is allowed.
[0026]
The mechanism of drainage / penetration into the ground and water absorption from the ground using the permeation type pipe constructed as described above will be described. First, in the case where the groundwater level in the drainage ground 30 is lower than the in-pipe water level of the osmotic box culvert 1, and when the in-pipe water level is changed, the grounds 30 and 20 are taken from the intake and discharge ports 11, 16 and 17 of the flowing water in the pipe. The following (1) to (4) show the state of penetration into the water.
[0027]
(1) As shown in FIG. 5 (a), when the flow rate in the pipe is small and the water level in the pipe is at a low place near the flow rate adjustment valve 12, the water pressure due to the flow water in the pipe acting on the flow rate adjustment valve 12 is small. Although 12 hits the inner wall surface, the adhesion is low. Therefore, a part of the running water in the pipe is drained from the suction / drain 11 and penetrates into the drainage ground 30 and then penetrates into the local ground 20.
[0028]
(2) As shown in FIG. 5 (b), when the flow rate in the pipe increases from the situation (1) and the water level in the pipe approaches the medium-level intake / drain port 16, the water pressure due to the pipe running water acting on the flow rate adjustment valve 12 is increased. As a result, the flow rate adjusting valve 12 increases the adhesion to the inner wall surface. For this reason, a small amount of in-pipe water leaks out from the suction / drain port 11 and permeates into the ground 30 and 20, but most of the in-pipe flow is secured in the pipe.
[0029]
(3) As shown in FIG. 6 (a), when the flow rate in the pipe increases from the situation (2), and the water level in the pipe reaches or exceeds the medium-level intake / drain port 16, the flow regulating valve 12 ensures the flow rate in the pipe. Is the same as situation (2), but due to the head difference between the water level in the pipe and the groundwater level, the water in the pipe is drained from the medium-level intake 16 and penetrates into the drainage ground 30 and the groundwater level rises. Penetrating into the local ground 20. That is, the penetration into the ground 30 and 20 is possible in a state in which the pipe flow rate is secured to some extent. At this time, since the suction prevention material 27 arranged at the suction / drain port 16 has flow resistance, the pipe running water gradually permeates into the ground 30 and 20. Moreover, since the suction prevention material 27 has a filter function, the discharge of dust and earth and sand contained in the pipe running water is stopped, and the drainage ground 30 is prevented from being clogged.
[0030]
(4) As shown in FIG. 6 (b), when the flow rate in the pipe increases further than in the situation (3), and the water level in the pipe reaches or exceeds the highest level water intake / discharge port 17, the flow rate adjustment valve 12 ensures the pipe flow rate. The action is the same as in the situation (2), but the in-pipe water is also drained from the top level water intake / outlet 17 and penetrates into the drainable ground 30,20. That is, when the inside of the pipe is filled with running water, the running water in the pipe is efficiently drained from the suction and drain ports 16 and 17 and permeated into the ground 30 and 20. The function of the suction preventing material 27 is the same as in the situation (2).
[0031]
Next, when the in-pipe water level of the osmotic box culvert 1 is lower than the groundwater level in the drainage ground 30, and when the in-pipe water level changes, the groundwater inlets 11 and 16 in the ground 30 are changed. , 17 show the water absorption state into the pipes in the following (5) to (8).
[0032]
(5) As shown in FIG. 7 (a), the amount of drainage supplied to the pipe (rainfall) decreases, the pipe drainage becomes faster than the drainage ground 30, and the pipe flow rate is higher than the situation (4). When the water level in the pipe 30 becomes lower than the groundwater level of the drainable ground 30, the groundwater in the ground 30 is absorbed into the pipe from the top level water intake / drainage port 17 due to the head difference between the water level in the pipe and the groundwater level. At this time, since the suction preventing material 27 disposed in the water suction / drain port 17 has flow resistance, the groundwater is gradually absorbed into the pipe with a time difference (time delay).
[0033]
(6) As shown in FIG. 7 (b), when the pipe flow rate is lower than the situation (5) and the water level in the pipe is lower than the medium level water intake / discharge port 16, the groundwater in the ground 30 is at the medium level water intake / drain port. Water is absorbed into the pipe from 16. The function of the suction preventing material 27 is the same as in the situation (5).
[0034]
(7) As shown in FIG. 8 (a), when the flow rate in the pipe is further reduced from the situation (6) and the water level in the pipe is lower than the lowest level water intake / discharge port 11, the groundwater in the ground 30 flows into the flow control valve. 12 is opened and water is absorbed into the pipe from the lowest level water intake / drain 11. The function of the suction preventing material 27 is the same as in the situation (5).
[0035]
(8) As shown in FIG. 8 (b), when the flow rate in the pipe increases again and the water level in the pipe rises, the water absorption into the pipe stops and the situation similar to situation (1) is obtained.
[0036]
According to the osmotic tube constructed as described above, the following effects can be obtained.
[0037]
(1) Improvement of the original effect of osmotic pipe dredging With respect to the problem that the flow rate in the pipe increases and flooding frequently occurs, even if the diameter of the pipe dredging is not increased, the surrounding ground becomes the drainage ground 30, and this drainage ground This can be accommodated by efficiently infiltrating the water in the pipe 30.
In addition, it is possible to cope with problems such as lowering or depletion of groundwater by infiltrating a part of the pipe running water into the local ground 20 through the drainable ground 30 and improving the water retention / restoration function of the local ground 20.
[0038]
(2) Adjustment of the planned pipe flow rate and adjustment of the amount of inflow water into the ground is possible. Precast the fitting side walls 10 and 15 having the suction outlets 11, 16 and 17 separately from the box culvert body 2. By fitting in the fitting window 6, the shape of the fitting side walls 10, 15 and the level (height) and shape dimensions of the water intake / drain ports 11, 16, 17 can be arbitrarily determined.
And it is possible to adjust the flow rate in the planned pipe and the amount of penetration into the ground 30 and 20 only by forming the fitting side walls 10 and 15 in which the levels and shape dimensions of the water intake and discharge ports 11, 16 and 17 are adjusted.
[0039]
(3) Manufacturability and cost can be reduced when manufacturing The box culvert is integrally formed because the fitting side walls 10 and 15 having the suction and drain ports 11, 16 and 17 are precast separately from the box culvert body 2. As a result, the manufacturing effort can be reduced and the cost can be reduced. In particular, when the water intake / drain opening is a hole, the present invention is effective because it takes a lot of time to integrally form the box culvert.
[0040]
(4) It is possible to ensure the flow rate in the pipe when the water level in the pipe is low. By providing the flow rate adjusting valve 12 at the lowest level water intake / outlet port 11, the water level in the pipe is as described in the above situations (1) to (3). It is possible to ensure the flow rate in the pipe that should flow (in the pipe) when the flow rate is low.
[0041]
(5) By providing a flow rate adjusting valve 12 at the lowest level water intake and discharge port 11 capable of time difference water intake and discharge corresponding to the change in the flow rate in the pipe, and further by arranging a suction prevention material 27 at the water intake and discharge ports 11, 16 and 17, As described in the above situations (1) to (8), the time-differential drainage corresponding to the change in the pipe flow rate becomes possible. Thereby, the rapid weakening of the local ground 20 can be prevented.
[0042]
(6) Prevention of uneven settlement of ground and pipe dredging The time difference drainage of (5) above can prevent uneven settlement of the local ground 20 and the penetrating pipe dredging.
In addition, laying the foundation concrete 25 directly under the penetrating box culvert 1 also helps prevent the uneven settlement. Furthermore, by laying the foundation concrete 25 that is usually laid only directly under the box culvert 1 up to the groove bottom 23 that protrudes directly under the box culvert 1, the uneven settlement can be further prevented.
[0043]
(7) Additional drainage ground 30 for water purification function Since not only the backside crushed stone 28 that has the effect of purification of water quality between gravels, but also a water purification material, its water purification function (in this example, “ Purification of water quality can be expected by the biochemical removal mechanism of "Bioloop".
As the backing material, not only crushed stones such as single-grain crushed stones and cracked stones, but also waste concrete trash as construction by-products can be used. When the waste concrete glass is used, it is preferable to use one that has been neutralized to some extent, or otherwise, an alkali neutralizer is added.
[0044]
By the way, when there is a longitudinal gradient as shown in FIG. 9, when no treatment is performed as shown in (a), the relative levels of the water intakes 11, 16, and 17 with respect to the groundwater level are too shifted. It is not possible to efficiently infiltrate the running water from the suction outlets 11, 16, and 17 to the ground. Therefore, as shown in (b), for example, a water-impervious sheet 33 that can arrange the groundwater level stepwise is installed at intervals of about 20 m, or as shown in (c), the shapes of the water intake and discharge ports 11, 16, and 17. By adjusting the dimensions, efficient penetration can be achieved.
[0045]
[Second Embodiment]
Next, FIG. 10 shows an osmotic tube fist according to a second embodiment. When digging the local ground 20 into a groove shape, this osmotic pipe rod does not make the inner surface of the groove an upwardly expanding slope, but is driven by a sheet pile 35 to form a vertical surface, and between the sheet pile 35 and the drainage ground 30 This is different from the first embodiment in that a waterproof sheet 36 is disposed therebetween. This embodiment is suitable when there is a restriction on land such as an urban area.
[0046]
[Third embodiment]
Next, FIG. 11 shows an osmotic tube tube according to a third embodiment. In this permeation type tube rod, the permeation type box culvert 1 of the first embodiment is connected to the outside of both (or one) side walls of the box culvert 40 of the existing tube rod, and both the box culverts 40, 1 are arranged side by side. The cross section of the existing pipe is widened by matching and communicating the communication holes (core punched holes) 41 formed in adjacent side walls. According to the present embodiment, for example, an existing pipe cross section in an urban area where the pipe cross section (in-pipe water passage cross section) is insufficient can be arbitrarily widened.
[0047]
Note that the present invention is not limited to the above-described embodiments, and can be embodied with appropriate modifications without departing from the spirit of the present invention.
[0048]
【The invention's effect】
The invention according to claim 1 enables the adjustment of the flow rate in the planned pipe and the adjustment of the infiltration amount, thereby reducing the labor and cost in manufacturing.
The invention according to claim 2 enables the effect of the invention according to claim 1, the securing of the flow rate in the pipe that should flow originally when the pipe water level is low, the time-difference drainage, the softening of the local ground, It also has the effect of contributing to the prevention of uneven settlement of pipes.
The invention which concerns on Claims 3-19 has both these effects and each effect mentioned above.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an osmotic tube fist according to a first embodiment of the present invention.
FIG. 2 is a perspective view of an osmotic box culvert used in the osmotic tube tub.
FIG. 3 is a perspective view of a first modified example of the same penetration type box culvert.
FIG. 4 is a cross-sectional view of a second modified example of the same infiltration type box culvert.
FIG. 5 is a cross-sectional view showing a state of drainage by the same osmotic pipe rod.
FIG. 6 is a cross-sectional view showing the continuation of the state of drainage by the same osmotic pipe rod.
FIG. 7 is a cross-sectional view showing a state of water absorption by the osmotic pipe tube.
FIG. 8 is a cross-sectional view showing the continuation of the state of water absorption by the same osmotic type pipe rod.
FIG. 9 is a side view in the case where there is a longitudinal gradient in the osmotic tube fistula.
FIG. 10 is a cross-sectional view of an osmotic tube fist according to a second embodiment of the present invention.
FIG. 11 is a cross-sectional view of an osmotic tube fist according to a third embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Osmosis type box culvert 2 Box culvert main body 3 Bottom plate 4 Side wall 5 Top plate 6 Fitting window 10 Fitting side wall 11 Bottom level water intake / drain 12 Flow rate adjusting valve 15 Insert side wall 16 Middle level water intake / drain 17 Top level Suction and discharge port 20 Local ground 25 Foundation concrete 27 Suction prevention material 28 Back crushed stone 29 Water purification material 30 Drainable ground 32 Excavated soil 40 Box culvert 41 of existing pipe

Claims (19)

  A box culvert body made of precast concrete in which a window for fitting is provided in the side wall; a fitting side wall formed so as to be able to be fitted into the window for fitting and having an inlet / outlet for allowing water to enter and exit; Osmotic box culvert with   A box culvert body made of precast concrete having a fitting window penetrating through the side wall; and a fitting side wall formed so as to be fitted into the fitting window; and at least two levels above and below the fitting side wall. An osmotic box culvert with an inlet / outlet for water to enter and exit, and a lower-level inlet / outlet provided with a flow adjustment valve to ensure the flow rate in the pipe.   The penetration type box culvert according to claim 1 or 2, wherein the fitting side wall is made of precast concrete.   The permeation type box culvert according to claim 1, 2, or 3, wherein a hole serving as the water suction / drainage hole is formed through the fitting side wall.   The infiltration type box culvert according to claim 1, 2, or 3, wherein a recess serving as the water suction / drainage port is formed on an outer peripheral edge of the fitting side wall.   6. The penetrating box culvert according to claim 1, wherein the fitting side wall is divided into at least two upper and lower stages.   The permeation type box culvert according to claim 6, wherein a recess serving as the water intake / drainage port is formed at a lower edge of the relatively upper fitting side wall or an upper edge of the relatively lower fitting side wall.   The permeation type box culvert according to claim 5 or 7, wherein the water suction / drainage port by the recess is in the shape of a horizontally long slit.   3. The osmotic box culvert according to claim 2, wherein the flow rate adjusting valve is a valve that closes the suction / drainage port when the pipe water level is higher than the groundwater level in the ground and opens the suction / drainage port when the water level is low.   The osmotic box culvert according to claim 9, wherein the flow rate adjusting valve is a valve that is in close contact with the inner wall surface of the peripheral edge of the water intake / drain port, closes the water intake / drain port, and opens the water intake / drain port away from the inner wall surface.   An osmotic tube tub constructed by connecting a plurality of the osmotic box culverts according to any one of claims 1 to 10.   The permeation type box culvert according to any one of claims 1 to 10 is juxtaposed on the outside of the side wall of the box culvert of the existing pipe rod, and the communication holes formed in the adjacent side walls of both box culverts are matched. Osmotic pipe constructed by expanding the cross section of the existing pipe.   The osmotic pipe tube according to claim 11 or 12, wherein a drainage ground is formed on the outer side of the side wall of the osmotic box culvert.   The osmotic pipe according to claim 13, wherein the drainage ground is formed by using a granular material such as crushed stone, cracked stone, and waste concrete glass.   The osmotic pipe tube according to claim 14, wherein the drainage ground is formed using the granular material and a water purification material.   The osmotic pipe tube according to any one of claims 11 to 15, wherein a suction prevention material having flow resistance and filter action is disposed at the water suction / drainage port.   The osmotic pipe tube according to any one of claims 11 to 16, wherein foundation concrete is laid immediately below the osmotic box culvert.   The osmotic pipe tube according to any one of claims 11 to 16, wherein the foundation concrete is laid immediately below the osmotic box culvert or on the groove bottom of the ground of the projecting area.   After carrying the box culvert main body according to claim 1, 2, 3, 4, 5, 6, 7 or 8 into the field, a penetration side wall is fitted into the fitting window to constitute a permeation type box culvert. A method for constructing an osmotic tube culvert comprising connecting a plurality of osmotic box culverts.

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