JP3964729B2 - Groundwater treatment method, groundwater treatment apparatus, and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a groundwater treatment method, a groundwater treatment apparatus, and a method for producing the same, which are used for underground investigation, draining groundwater, condensing groundwater, and the like in treating groundwater.
[0002]
[Prior art]
In general, boring is conducted to investigate groundwater, soil quality, etc., and vertical boring, horizontal boring, oblique boring, and the like are known. In the following description, horizontal boring and oblique boring are collectively referred to as horizontal boring. 10 to 12 show a vertical boring method for a conventional underground survey. FIG. 10 shows an example in which four vertical borings 2 are performed on the slope 1. FIG. 11 shows a longitudinal section of a boring part. At each measurement position 3 a, 3 b, 3 c in the borehole 3 formed by the vertical boring 2, ground water and soil quality such as water pressure, flow velocity, flow direction, etc. are measured as point data. FIG. 12 is a schematic diagram of the groundwater and soil investigation and analysis method showing an example in which the vertical boring 2 and the horizontal boring 4 are combined. By performing this vertical boring 2 and horizontal boring 4, continuous investigation of groundwater and soil properties and three-dimensional analysis are possible. However, in order to perform the horizontal boring 4, the vertical boring 2 must be performed, which increases the number of boring required.
[0003]
FIGS. 13-16 is a conceptual diagram explaining the conventional water draining method in a natural slope and a banking slope. In the example shown in FIGS. 13 and 14, the water collection well 5 is drilled in the slope 1, and the horizontal boring 6 is radially formed from the water collection well 5 toward the slope to form a drain hole. Further, a drain pipe 8 is constructed from the water collection well 5 to the ground surface 7 toward the lower side of the slope 1, and the water collected from the drain hole and collected in the water collection well 5 is drained.
[0004]
15 and 16 are conceptual diagrams for explaining a conventional drainage countermeasure construction method on an embankment slope. When the embankment 10 is performed on the natural slope 9 and the road 11 is constructed at the top of the embankment, the horizontal boring 13 is performed from the embankment slope toward the water path 12 of the natural slope 9 to drain the water from the water path 12. Moreover, the horizontal boring 14 is performed from the embankment slope toward the underdrain 15 provided at the tip of the water channel 12, and the drainage from the underdrain 15 is performed.
[0005]
In addition, if water is drained as described above, the groundwater in the area decreases, and in some cases, new problems such as land subsidence occur. Therefore, as shown in FIG. Vertical drilling up to 16), drain pipe 17 is inserted into the drilled hole, water is injected from the end of drain pipe 17 to raise the water level in the ground and condense groundwater It is something to try.
[0006]
[Problems to be solved by the invention]
However, the above-described underground survey method using vertical boring cannot effectively investigate the continuity of groundwater between drilling holes formed by boring. Moreover, even if the continuity between drill holes is assumed, it is difficult to perform three-dimensional analysis only by two-dimensional analysis of groundwater and the like, and the three-dimensional distribution of groundwater cannot be effectively grasped. Therefore, it is difficult to set the position of the most effective countermeasure work (water path) only by vertical boring. Furthermore, if the three-dimensional distribution of groundwater or the like is to be grasped only by vertical boring, the number of boring must be increased, and boring must be performed even in landslide areas and dangerous areas as shown in FIG. It was.
[0007]
In addition, the survey method combining vertical and horizontal boring and the survey method using oblique boring can investigate groundwater continuity and three-dimensional analysis. However, as the number of bores increases, In some cases, for example, it is necessary to excavate a vertical shaft to perform boring, and the number of bores increases and construction is difficult. In addition, oblique boring was relatively difficult to construct.
[0008]
Moreover, in the conventional draining method on the inclined surface, the drainage hole is constructed by boring toward the natural mountain side, and water is collected at one end of the drainage hole and drained at the other end. For this reason, the flow direction of groundwater and the water collection direction of the drain pipe did not correspond, and the water collection area became small as a result. Therefore, since the amount of water collected per bowl is small and the drainage efficiency is low, the number of bowls is large. Moreover, the horizontal boring for constructing a horizontal drain hole at an effective water channel position could not be performed.
Moreover, when it is going to provide a water collection well in consideration of the efficiency of water collection and boring construction, there exists a subject that the construction is complicated.
[0009]
Further, when performing the back washing operation when the drain pipe is clogged during maintenance, the tip of the drain pipe is located in the ground and is not open, so that the back washing is difficult. Also, when exchanging the drain pipe, the work must be performed in the water collection well, which is very difficult.
Further, the condensate treatment has a drawback that the condensate efficiency to the condensate target layer is low because the infiltration area is small.
[0010]
In order to solve the above problems, the present invention continuously investigates soil quality, groundwater pressure, flow velocity, flow direction, etc. at any point in a curved borehole, and enables groundwater treatment that enables three-dimensional analysis with a small number of boreholes. It aims to provide a method.
In addition, for the purpose of providing a groundwater treatment method and apparatus capable of draining with a large amount of water collection and high drainage efficiency by inserting a perforated drainage pipe into a hole drilled by curved boring. Yes. Furthermore, it is possible to provide a groundwater treatment method and apparatus for collecting groundwater that can be discharged directly to the ground surface without the need of a drainage well or drain pipe, and that can be easily backwashed or replaced with a drain pipe during maintenance. It is aimed.
In addition, the present invention provides a groundwater treatment method capable of widening the infiltration area and efficiently recovering groundwater.
[0011]
[Means for Solving the Problems]
The present invention is characterized in that the ground in the survey range is drilled using curved boring, and water pressure, flow velocity, flow direction, soil quality, etc. are surveyed at an arbitrary point in the drilling hole.
Further, in the water treatment method of the present invention, the ground within the range for draining groundwater is drilled using curved boring, and the drain pipe is inserted into the drill hole, and water is collected from the side of the drain pipe. Water is drained from the end of the drain pipe.
In addition, a plurality of drilling holes that are included in a plurality of intersecting surfaces and do not communicate with each other are formed by curved boring.
In addition, the ground within the range where the groundwater is to be condensed is drilled by curved boring, a drain pipe is inserted into the drill hole, water is supplied from the upper end of the drain pipe, and this water is supplied to the drain pipe. It is characterized by being discharged from the side of the underground buried area and supplied to the groundwater in the ground.
The curved boring is characterized in that one end starts drilling from the ground surface and the other end communicates with the ground surface again.
Further, the curved boring is characterized in that the direction can be freely changed based on the result of the underground survey in the middle of drilling.
Moreover, the drainage by the drain pipe is performed from both ends of the drain pipe.
The drain pipe collects groundwater by gravity and discharges naturally from the end of the drain pipe.
Further, the drain pipe is characterized in that a water collecting material is wound around a perforated pipe.
The drain pipe can be back-washed by injecting cleaning water from one end and draining from the other end.
The drain pipe is used for a natural slope, a bank slope, a cut slope, or the like.
Further, the drain pipe is used for draining leachate in a waste disposal site.
In addition, it is a method of treating groundwater using curved boring, and after drilling the ground within the survey area and conducting a water pressure, flow rate, flow direction, etc. or soil survey at any point within the drill hole, A drain pipe is inserted into the drain pipe, and water collected from the drain pipe is drained from the end of the drain pipe.
Further, the water draining device of the present invention includes a hole drilled using curved boring in the ground within the range of draining groundwater, and inserted into the drilled hole, at least one of both ends from the ground. And a drain pipe having a hole that is open to the atmosphere and into which water in the ground is fed.
In addition, according to the survey results using curved boring, curved boring is performed so that it intersects with a predetermined range of formation where groundwater should be discharged, and water is drained from the ground by inserting a drain pipe into this curved boring hole. It is characterized by manufacturing equipment or equipment for punching.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing an underground survey method using curved boring of the present invention. Here, the term “curved boring” refers to boring that uses a steerable boring machine to cut a necessary underground area in a curved line or linearly from one side of the ground surface, and the other end is provided on the ground surface as necessary. In addition, an underground survey is performed in the middle of drilling, and the survey results are reflected in the correction of the drilling direction. Further, the drilling line shape refers to a boring that forms a line shape having a curved portion at least at one place in any of an arc shape, a combined curve, and a combination of a curve and a straight line. Further, the linear direction may be any one of a plane, a vertical, and a combination thereof.
FIG. 1 shows an embodiment in which groundwater or the like on a natural slope 20 is investigated using curved boring. First, the ground in the survey range is drilled by curved borings 21 and 22 in directions substantially orthogonal to each other. At this time, boring is performed so that the curved borings 21 and 22 do not intersect (communicate). The water pressure, flow velocity, flow direction or soil quality is investigated at an arbitrary point in the drilling hole thus formed. When conducting a soil survey, samples are taken at arbitrary points in the curved borehole.
[0013]
Moreover, curved boring drills a necessary underground location using a curve or a straight line from the ground surface on one side. In the example shown in FIG. 1, the other end is again exposed to the ground surface, but the other end is not necessarily exposed to the ground surface. In the curved boring 21, a hole is drilled from point A on the natural slope 20 toward point B on a substantially equal contour line. Further, in the curved boring 22, a hole is drilled so as to protrude downward from point C on the slope 20 toward point D on the ground surface located below the slope. At this time, even if the range 23 including the point D is a slipping or dangerous place, the operator can perform the boring work without entering the range, and the groundwater and soil can be removed within the range including the dangerous place. Can investigate. In the present embodiment, groundwater pressure, flow velocity, flow direction, soil quality, etc. can be continuously investigated and analyzed three-dimensionally in the ranges indicated by a, b, c, and d. Therefore, it is possible to grasp the three-dimensional distribution of groundwater and soil, and to set the most effective water channel position.
[0014]
FIG. 2 is a cross-sectional view along curved boring in the underground survey method of the present invention. A downward curved boring 22 is performed from point C at the upper part of the slope toward point D at the lower part of the slope. At arbitrary points a1, a2, and a3 to a11 of the formed hole, the water pressure, flow velocity, flow direction, soil quality, etc. of the groundwater are continuously investigated. In addition, curved boring is performed along a cross section substantially orthogonal to the cross section shown in FIG. 2, and the groundwater pressure, flow velocity, flow direction, soil quality, etc. are continuously investigated at arbitrary points to obtain a three-dimensional view of groundwater, etc. Analysis is possible, and a three-dimensional distribution shape can be grasped.
[0015]
FIG. 3 shows the range of a three-dimensional region that can be investigated by curved boring. That is, the two substantially arc-shaped curved borings 24 and 25 are constructed so that the planes including the respective arcs are substantially orthogonal. The two drilling holes should not cross each other. By carrying out curved boring in this way, it becomes possible to analyze the three-dimensional distribution of groundwater and soil.
[0016]
Thus, after grasping the situation of groundwater or the like using the above-described curved boring, a location to be drained can be determined, and a drainage hole can be provided at the location by the following method.
FIG. 4 is an explanatory view showing a method of draining water from a natural slope by the groundwater treatment method of the present invention. The natural slope 26 is drilled by the curved boring 27 so as to protrude upward from the slope toward the E ′ point on the substantially equal contour line from the E point. Accordingly, the horizontal position of the point E or the point E ′ of the curved boring 27 is lower than the middle of any one of the drilling holes. In the curved boring 28, a hole is drilled from the point G on the slope 26 toward the point H on the ground surface located below the slope. At this time, even if the range 29 including the tip E point and the H point of the curved boring is a slip location or a dangerous location, the operator can perform the boring work without entering this range, and Groundwater can be discharged within the range. The direction of drilling may be performed from the lower side to the upper side of the slope.
[0017]
FIG. 5 is a cross-sectional view of a drain pipe used in the groundwater treatment method of the present invention. The drain pipe 30 is configured by winding a water collecting material 30b made of a porous material such as a loofah-like material around an outer periphery of a perforated pipe 30a having a large number of holes formed around it. By comprising in this way, the water collection function along the outer peripheral surface of a pipe material can be improved.
[0018]
When the drainage pipe 30 constructed as described above is constructed by the drainage method from the natural slope 26, the drainage pipe 30 is inserted into the hole formed by the curved borings 27 and 28. In the hole formed by the curved boring 27, the water collected by the drain pipe 30 is discharged from the open end point E or E ′. Further, in the hole formed by the curved boring 28, the water collected by the drain pipe 30 is discharged from the open end H. In this way, the drainage method can be constructed at an effective water channel position by curved boring. Moreover, as shown in FIG. 4, the flow direction F of the slope and the water collection direction R of the drain pipe substantially coincide with each other, and the water collection area can be increased. Therefore, the amount of collected water (amount of drainage) per bowl is large, and the drainage efficiency can be increased. Also, the number of bowls can be reduced. The side surface of the drainage pipe is a concept that includes not only the side part of the drainage pipe in the ground but also the end part of the pipe.
[0019]
Furthermore, the start end E and the end E ′ of the curved boring 27 are located on the ground surface, so that the collected groundwater can be discharged directly to the ground surface, and the water collecting well for temporarily storing the collected water as in the past. There is no need to install a drain pipe that drains water from the drainage well. The same applies to the curved boring 28.
[0020]
FIG. 6 is an explanatory view of a drainage pipe replacement operation in the drainage method from the natural slope of the present invention.
For example, even if the drainage pipe 30 is clogged due to long-term use and the water collection efficiency is reduced, both ends of the drainage pipe are open, so the wash water is injected from the drain outlet on one side. Then it can be backwashed and drained from other outlets. Moreover, since both ends are open, the exchanging operation of the drain pipe 30 is easy. Thus, the maintenance of the drain pipe 30 is facilitated.
[0021]
FIG. 7 is a plan view showing a draining method from the embankment slope according to the groundwater treatment method of the present invention, and FIG. 8 is a sectional view thereof. When embankment 32 is performed on natural slope 31 and road 33 is constructed at the top of the embankment, groundwater springs from water channel 34 on natural slope 31. Therefore, in order to drain these groundwaters, curved boring 35 is performed from the embankment slope toward the water channel 34. The curved boring 35 is bored in a circular arc shape from the slope toward the vicinity of the tip of the water groove 34, and when reaching the water groove 34, the hole is straightly drilled in parallel to the slope and advances a predetermined distance. Boring in a circular arc toward the surface, boring to the surface of the slope. The drainage pipe 30 is inserted into the drilling hole thus formed, and drainage from the water channel 34 is performed from the end points J and K of the drilling hole. Moreover, in order to drain from the underdrain 36 provided at the tip of the water channel 34, a curved boring 37 is performed from the embankment slope.
[0022]
As is clear from FIG. 7, the intermediate portion of the curved boring 35 can be arranged substantially in parallel to the exit width direction of the water channel 34 on the natural slope 31, and the groundwater flow direction F and the water collection direction of the drain pipe 30. Since R matches, water can be effectively collected by the drain pipe 30 inserted into the drilling hole. Similarly, with respect to the curved boring 37, the middle portion of the curved boring can be arranged substantially parallel to the exit width direction of the underdrain 36, and the drain pipe 30 can collect water effectively. Therefore, the number of curved borings can be reduced. The groundwater collected by the drain pipe can be naturally drained from the open end points J, K, L, and M.
[0023]
As described above, the drainage method of the present invention can be applied not only to a normal embankment slope, but also to leachate on a cut slope or a slope in a waste disposal site. In this case, forced drainage by a pump or the like is possible without being limited to natural drainage.
In the present embodiment, the drainage pipes are arranged in two stages, but may be arranged in multiple stages depending on the state of the groundwater.
[0024]
Further, when the drain pipe 30 is clogged, both ends J, K, L, and M are open, so that the cleaning water can be injected from one end and back cleaned. Moreover, since both ends are open, the exchanging operation of the drain pipe 30 is easy.
[0025]
FIG. 9 is a cross-sectional view showing condensate treatment by the groundwater treatment method according to one embodiment of the present invention. When restoring groundwater, curved boring 41 is performed from the ground surface 40. The curved boring 41 is excavated linearly until reaching the condensate target layer 42, and after reaching the condensate target layer 42, the curved boring 41 is bent in an arc shape to drill the ground in the condensate range. The inside of the condensate target layer 42 is penetrated and a hole is drilled substantially parallel to the target layer. After inserting the drain pipe 30 into the drilling hole, water is pumped from the upper end of the drain pipe 30 to raise the water level in the ground and recharge the groundwater as a recharge well. Moreover, the pumping of water is not limited to using gravity, and may be pumped by a pump.
[0026]
When comprised as mentioned above, the osmosis | permeation area of the drain pipe 30 located in the condensate object layer 42 becomes large, and high condensate efficiency can be obtained.
Curved boreholes that are drilled for underground surveys, draining groundwater, and condensing groundwater should be the same as those drilled for previous purposes (for example, surveys). For example, it may be used for draining or condensing) or may be drilled according to the purpose.
[0027]
【The invention's effect】
As described above, the present invention is a method for treating groundwater using curved boring, in which the ground in the survey area is drilled, and water pressure, flow rate, flow direction, etc. or soil survey is conducted at an arbitrary point in the drilling hole. As a result, three-dimensional analysis of groundwater can be performed with a small number of bores.
In addition, the ground within the range to drain groundwater is drilled, a drain pipe is inserted into the drill hole, and the water collected from the drain pipe is drained from the end of the drain pipe. Efficient groundwater can be collected by the number of bores. Moreover, since a water collection well and a drain pipe are unnecessary, construction cost can be reduced. Furthermore, even when the drain pipe is clogged, both ends are open, so that the back cleaning can be easily performed by press-fitting the cleaning water from one end. In addition, it is easy to replace the drain pipe.
Moreover, since two curved borings in which the surfaces including the drilling holes intersect each other are performed, three-dimensional analysis of groundwater or the like can be performed with a small number of borings.
In addition, after drilling the ground within the condensate range, a drain pipe is inserted into the drill hole, and water is injected from the end of the drain pipe so that water can be introduced into the ground from the side of the drain pipe. As the water level in the ground is increased by effectively absorbing water, groundwater can be recharged effectively.
In addition, since one end is drilled from the ground surface and the other end is again communicated to the ground surface, drainage can be performed directly from the end of the drilling hole, and no drainage well or drain pipe is required. Therefore, the construction cost can be reduced. Moreover, the back washing | cleaning and replacement | exchange operation | work of a drain pipe can be performed easily.
In addition, since the curved boring freely changes the excavation direction based on the result of the underground survey in the middle of drilling, the drainage and condensate of the groundwater can be performed according to the ground conditions, and an optimal boring hole can be formed. .
Moreover, since the drainage by the drainage pipe is performed using both ends of the drainage pipe, drainage efficiency can be improved, and condensate construction can be performed from both ends of the drainage pipe, which is efficient. Further, when draining, the backwashing and replacement work is easy when the drain pipe is clogged.
Since the drain pipe has a water collecting material wound around a perforated pipe, the water collecting function of the drain pipe can be improved.
Since the drain pipe can be back-washed by injecting wash water from one end and draining from the other end, maintenance and inspection of the drain pipe is facilitated.
Since the drain pipe is used for natural slopes, embankment slopes, cut slopes, and the like, it is possible to efficiently perform drainage treatment and condensate treatment on these slopes.
Since the drain pipe is used to drain the leachate in the waste disposal site, the leachate in the waste disposal site can be efficiently drained.
After drilling the ground in the survey area using curved boring and investigating water pressure, flow velocity, flow direction or soil quality at any point in the drill hole, insert a drain pipe into the drill hole, Since the water collected from the drain pipe is drained from the end of the drain pipe, drainage treatment can be performed using the borehole for investigation as it is.
Drilling the ground within the treatment range using curved boring, inserting a drain pipe into the drill hole, draining the water collected from the drain pipe from the end of the drain pipe, and then draining the water Since water is pumped from the end of the pipe and the water level in the ground is increased, the same boring hole can be used for both draining and condensing.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an underground survey method using curved boring of the present invention.
FIG. 2 is a perspective view along curved boring in the underground survey method.
FIG. 3 is a schematic diagram of curved boring for the underground survey.
FIG. 4 is an explanatory view showing a method of draining water from a natural slope by the groundwater treatment method.
FIG. 5 is a cross-sectional view of a drain pipe used in the groundwater treatment method of the present invention.
FIG. 6 is an explanatory view of a drain pipe replacement work in the drain method from the natural slope.
FIG. 7 is a plan view showing a method for draining water from the embankment slope by the groundwater treatment method.
FIG. 8 is a cross-sectional view showing a method of draining water from the embankment slope by the groundwater treatment method.
FIG. 9 is a cross-sectional view showing condensate treatment by a groundwater treatment method according to an embodiment of the present invention.
FIG. 10 is a perspective view showing a conventional method for examining groundwater by vertical boring.
11 is a cross-sectional view of FIG.
FIG. 12 is a schematic view showing an investigation method combining conventional vertical boring and horizontal boring.
FIG. 13 is a perspective view for explaining a conventional drainage method on a natural slope.
FIG. 14 is a perspective view for explaining a conventional drainage method on a natural slope.
FIG. 15 is a plan view for explaining a drainage method on a conventional embankment slope.
FIG. 16 is a cross-sectional view illustrating a drainage method on a conventional embankment slope.
FIG. 17 is a cross-sectional view illustrating a conventional groundwater condensate method.
[Explanation of symbols]
20 Natural Slope 21 Curved Boring 22 Curved Boring 23 Range 24 Curved Boring 25 Curved Boring 26 Natural Slope 27 Curved Boring 28 Curved Boring 29 Range 30 Drain 31 Natural Slope 32 Filling 33 Road 34 Waterway 35 Curve Boring 36 Dark Bore 37 Curve Boring 40 Ground surface

Claims (13)

A method of drilling the ground in the survey area using curved boring and investigating water pressure, flow velocity, flow direction, soil quality, etc. at any point in the drill hole, which is included in each of a plurality of intersecting surfaces. A groundwater treatment method characterized by forming a plurality of drilling holes that do not communicate with each other by curved boring . Drill the ground in the range where drainage of groundwater is performed using curved boring, insert the drain pipe into the drill hole, and collect the water collected from the side of the drain pipe from the end of the drain pipe A method for draining water, wherein the drainage is performed from both ends of a drain pipe . The curved boring according to claim 1 or 2, wherein one end of the boring is started from the ground surface, and the other end is communicated with the ground surface again. The curved boring according to claim 1 or 2, wherein the direction is freely changed based on a result of an underground survey in the middle of drilling. A drainage pipe is inserted into the drilling hole according to claim 1, and the water collected from the side surface of the drainage pipe is drained from both ends of the drainage pipe . The groundwater treatment method according to claim 2 , wherein the drainage pipe collects groundwater by gravity and naturally drains water from an end of the drainage pipe. The drainage pipe according to any one of claims 2, 5, and 6, wherein a water collecting material is wound around a perforated pipe. The drainage pipe according to any one of claims 2, 5, 6, and 7 can be backwashed by injecting wash water from one end and draining from the other end. The drainage pipe according to any one of claims 2, 5, 6, 7, and 8 is used for slopes such as natural slopes, embankment slopes, and cut slopes. The drainage pipe according to any one of claims 2, 5, 6, 7, 8, and 9 is used for draining leachate in a waste treatment plant. It is a method of treating groundwater using curved boring, which is formed by curved boring after drilling the ground within the survey area and conducting water pressure, flow rate, flow direction etc. or soil investigation at any point in the drilling hole. A drainage pipe is inserted into the drilled hole, and the water collected from the drainage pipe is drained from the end of the drainage pipe, and is included in a plurality of surfaces intersecting each other and not communicating with each other. A groundwater treatment method characterized by forming a hole by curved boring . A hole drilled using curved boring in the ground within the range where water is drained from the groundwater, and inserted into the drilled hole, at least one of both ends is opened to the atmosphere from the ground, An apparatus having a drain pipe having a hole into which water is fed, wherein the drainage is performed from both ends of the drain pipe . After drilling the ground in the survey area using curved boring and conducting water pressure, flow rate, flow direction, etc. or soil investigation at any point in the drilling hole, collect the ground from the side into the drilling hole formed by curved boring. A method of inserting a drain pipe for draining drained water from an end, and forming a plurality of drilling holes that are included in a plurality of intersecting surfaces and do not communicate with each other by curved boring, and draining the drainage A method for producing a groundwater treatment apparatus, which is performed from both ends of a pipe .

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