JP2007270527A - Pumping well embedding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pumping well embedding method for embedding a pumping well which can pump up groundwater only from a region at a predetermined depth, in a waste disposal area, with favorable accuracy and favorable efficiency. <P>SOLUTION: An embedding device formed of a hollow steel pipe 30, a cover body 10 detachably attached to the tip of the steel pipe 30, and a water leading pipe 20, is squeezed into a waste layer 51, and when the tip reaches a predetermined depth, the cover body 10 is detached from the steel pipe 30, and the steel pipe 30 is axially pulled up by a predetermined height, to thereby expose the water leading pipe 20 in the waste layer 51. Thereafter the steel pipe 30 is left in the waste layer 51 as the external wall of the well and the steel pipe 30 is fixed into the waste layer 51 by a fixing member 52. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for burying a pumping well for collecting groundwater in a predetermined depth region in order to analyze the state of waste dumped in a waste disposal site.

  At treatment plants and landfills where waste is dumped and disposed of, methods for stabilizing it early have been developed in order to prevent harmful gases from diffusing into the atmosphere. For example, Patent Document 1 discloses a method in which a vent pipe is embedded in a waste layer, and harmful gas is sucked out from the waste layer through the vent pipe.

  On the other hand, in order to stabilize the waste efficiently, it is preferable to locally grasp the state in the waste layer. The waste disposal site is usually formed by deeply digging the soil of the disposal site site, and the depth of the waste layer varies depending on the location. Therefore, in order to analyze the state of the waste having a predetermined depth, it is necessary to bury a pumping well that can collect groundwater in a region having a predetermined depth.

JP 2001-269640 A

  An object of the present invention is to provide a method capable of accurately and efficiently burying a pumping well capable of collecting only groundwater of a predetermined depth in a waste disposal site.

The present invention is a pumping well burying method in a waste disposal site,
A pumping well burying device comprising a hollow steel pipe, a lid body detachably attached to the tip of the steel pipe, and a water flow pipe inserted inside the steel pipe and having one end attached to the lid body, Turn the body downward, rotate the steel pipe and embed it in the waste layer.When the lid reaches a predetermined depth, remove the lid from the steel pipe, and move the steel pipe in the axial direction by a predetermined height. A part of the water flow pipe is pulled up to be exposed in the waste layer, and the steel pipe left in the waste layer is used as an outer wall of the pumping well.

  According to the present invention, a pumping well that guides only groundwater in a desired region into a water pipe by pulling up a steel pipe by a predetermined height after screwing an embedding device into a waste layer to a predetermined depth. Can be embedded easily. The pumping well buried according to the present invention pumps up the groundwater leached into the water pipe, so that there is no risk of surrounding waste clogging the pump or the like. In addition, since the steel pipe is left in the waste layer as the outer wall of the well, there is no fear that the well will be buried by the soil around the well, and if further waste is dumped on the well, Since it can be easily extended by extending upward, it can be used semi-permanently as a pumping well.

  Hereinafter, the present invention will be described specifically and in detail with reference to preferred embodiments of the present invention.

  FIG. 1 is an exploded perspective view showing an example of a pumping well burying apparatus used in the present invention. 2 is a schematic cross-sectional view of the tip portion of the pumping well burying apparatus of FIG. 1, and FIG. 3 is a view of the lid body of FIG. 1 as viewed from above. In the figure, 10 is a lid, 11 is a main body, 12 is an outer cylinder, 13a and 13b are spiral wings, 14a and 14b are tip blades, 15 is a through hole, 18 is a wire, 19 is a locking piece, and 20 is a water passage. A pipe, 21 is a hard resin member, 22 is a perforated resin pipe, 30 is a steel pipe, 31 is a notch part, 32 is a locking part, and 33 is a taper part. Hereinafter, each member will be described.

[Cover 10]
The lid body 10 is a member that is attached to the tip of the steel pipe 30 to close the steel pipe 30 and prevents waste and earth and sand in the waste layer from entering the steel pipe 30, and water is taken inside the lid body 10. The tip of the water flow pipe 20 is attached.

  The lid body 10 of this example has a cylindrical main body 11 having a bottom portion, and tip blades 14 a and 14 b are attached to the bottom portion of the tip, and the same position at the same height on the outer periphery of the tip of the main body 11. In the same spiral direction, the spiral blades 13a and 13b corresponding to half the outer circumference of the main body 11 are provided relatively discontinuously.

  In addition, the blade | wing and wing | blade attached to the cover body 10 used for this invention are not specifically limited, As shown in FIG. 4, V-shaped blade | wing 41a, 41b is also used preferably. Each of the V-shaped blades 41a and 41b in FIG. 4 is attached in a radial pattern from the normal line passing through the center of the bottom of the main body 11 of the lid plate 10, and has a right triangle shape that extends in a tapered shape from the tip toward the bottom of the main body 11. . In this example, the base of the triangle 41a that protrudes from the outer periphery of the outer cylinder 12 and 41b that fits in the outer cylinder 12 are used in combination so that the cross-section becomes a cross shape. The number of sheets and the shape of the cross section (the angle formed by two adjacent blades) are appropriately changed.

  Further, the outer cylinder 12 is concentrically disposed outside the main body 11 of the lid body 10 with a predetermined gap, and a locking piece 19 is attached so as to partially fill the gap. Note that the gap between the outer cylinder 12 and the main body 11 is closed at the front end side, and when the burying apparatus is embedded in the waste layer, the waste or earth and sand in the waste layer enters the gap. Is preventing.

[Water pipe 20]
The water flow pipe 20 used in the present invention is a member for collecting ground water in the waste layer after the buried device is buried in the waste layer. Therefore, the material is not particularly limited as long as it has good water permeability, but a material having flexibility is easy to handle. In particular, it is easy to handle when attaching to the lid 10 and inserting it into the steel pipe 30, and it is easy to work with. Specific examples include a perforated pipe in which holes are evenly formed in a vinyl chloride pipe and a pipe made of a nonwoven fabric with a spiral elastic body attached to the outside. Particularly preferably, as shown in this example In addition, a helical hard resin member 21 is wound around the outer side of a cylindrical flexible porous resin pipe 22. Specifically, “Kananet (registered trademark)” manufactured by Kanaflex Corporation is used. ". Since the water flow pipe 20 of this example is composed of a flexible perforated resin pipe 22, it can be wound up in a roll shape, so that it is supplied to the waste disposal site in a roll shape. Also, it can be used by being pulled out during the burying operation and cut into a required length. Moreover, when cutting at the time of work, it is easy to change the embedded length.

  In the present invention, the water flow pipe 20 is partially exposed in the waste layer as will be described later. However, since the exposed area is narrow, the length attached to the embedding device may be short. Specifically, it may be slightly longer than the height of the area where groundwater is collected, and the upper end portion is not exposed to the waste layer when the steel pipe 30 is pulled up. The tip of the water flow pipe 20 may be positioned about 100 cm above.

  Furthermore, it is preferable that the outer diameter of the water flow pipe 20 is slightly smaller than the inner diameter of the main body 11 so as to be along the main body 11 of the lid body 10. Specifically, the outer diameter of the water flow pipe 20 is preferably about 300 mm with respect to the inner diameter of the main body 11 of 305 mm.

  In the water pipe 20, a hole 18 is formed in the perforated resin pipe 22 near the tip and a wire 18 is attached, and the wire 18 is attached to the lid 10 through a through hole 15 provided in the main body 11.

[Steel pipe 30]
The steel pipe 30 used in the present invention acts as a pile when the embedding device is embedded in the waste layer, and after that, the steel pipe 30 disposed in the waste layer is left as it is after being pulled up by a predetermined height. This is a member used as the outer wall of the pumping well.

  The steel pipe 30 has an inner diameter larger than the outer diameter of the main body 11 of the lid body 10 and an outer diameter smaller than the inner diameter of the outer cylinder 12, and the tip is detachably attached to the lid body 10. Specifically, it is only necessary to form portions that can be locked to each other. In this example, a notch 31 that cuts into a substantially inverted L shape from the tip is formed at the lower tip of the steel pipe 30, and the lid 10 is formed with a locking piece 19 that can be locked by a locking portion 32 protruding inside the cutout portion 31. When the steel pipe 30 is attached, the tip of the steel pipe 30 is placed between the main body 11 of the lid 10 and the outer cylinder 12 while confirming the position so that the locking piece 19 enters the notch 31 of the steel pipe 30. By inserting in between and then rotating the steel pipe 30, the locking portion 32 enters the gap below the locking piece 19, and the lid 10 and the steel pipe 30 are integrated. In addition, when removing the cover body 10 from the steel pipe 30, if the steel pipe 30 is pulled up after rotating the steel pipe 30 reversely, it will detach | leave easily. Moreover, in this example, since the taper part 33 is provided in one of the opening ends of the notch part 31 of the steel pipe 30 (on the opposite side to the locking part 32), the lid 10 is removed from the steel pipe 30. Since the locking piece 19 slides along the tapered portion 33, the removal is performed smoothly.

  Further, in this example, as shown in FIGS. 2 and 3, the engaging region between the steel pipe 30 and the lid body 10 is covered with the outer cylinder 12, and the gap between the outer cylinder 12 and the main body 11 is the tip portion. Therefore, when the embedded device is embedded in the waste layer, the locking region does not directly contact the waste layer, and the waste is entangled in the locking region. There is no possibility of causing inconveniences such as obstructing embedding and preventing the lid 10 from being removed from the steel pipe 30.

[Embedding method]
Next, the pumping well burying method of the present invention will be described by taking the case of using the burying apparatus of FIG. 1 as an example. FIG. 5 is a schematic diagram showing an embedding process. In the figure, 51 is a waste layer and 52 is a fixing member.

  In the present invention, the tip of the water pipe 20 is attached and fixed to the lid body 10 (FIG. 5A), and then the water pipe 20 is inserted into the steel pipe 30 and the steel pipe 30 is locked to the lid body 10. [FIG. 5B]. In addition, after inserting the water flow pipe 20 in the steel pipe 30 first, the front-end | tip of the water flow pipe 20 may be attached to the cover body 10, and the steel pipe 30 may be latched to the cover body 10 next.

  In this example, the attachment of the lid body 10 and the steel pipe 30 only needs to latch the locking piece 19 provided on the lid body 10 in the notch 31 of the steel pipe 30, so other members and tools are required. It can be easily attached without using it.

  Furthermore, in this example, since the water flow pipe 20 is made of resin and has sufficient flexibility, even after the ventilation pipe 3 is attached to the lid body 10, the steel pipe is used by utilizing the bending of the water flow pipe 20. The water flow pipe 20 can be easily inserted into 30. Accordingly, the steel pipe 30 can be attached to the burying heavy machine in a state where the tip of the steel pipe 30 is inclined downward, and the water pipe 20 can be inserted from the lower end of the steel pipe 30.

  Next, the embedding device in the waste layer 51 is screwed in while rotating the steel pipe 30 with a heavy machine [FIG. 5 (c)]. At this time, in this example, since the lid body 10 having the spiral blades 13a and 13b and the tip blades 14a and 14b is attached to the tip of the steel pipe 30, the waste and earth and sand are pushed away by these, and the waste and earth and sand are brought outside. The steel pipe 30 can be easily embedded to a predetermined depth without being discharged. Moreover, since the tip of the hollow steel pipe 30 is closed by the lid body 10, waste and earth and sand do not enter the steel pipe 30.

  The lid 10 is removed from the steel pipe 30 and the steel pipe 30 is pulled upward in the axial direction by a predetermined height [FIG. 5 (d)]. In this example, the lid 10 and the steel pipe 30 are merely engaged with the notch 31 provided on the steel pipe 30 with the notch 31 provided on the lid 10, and the open end of the notch 31 is provided. Since the taper portion 33 is formed on the upper surface of the cover body 10, the locking piece 19 is pulled out of the notch portion 31 by pulling it up while rotating the steel pipe 30 in the direction opposite to that when the steel pipe 30 is attached to the cover body 10. Easily desorbs from 30.

  Moreover, the height which pulls up the steel pipe 30 at the said process is only for the area | region which extract | collects groundwater, and it needs to be careful so that the upper end part of the water flow pipe 20 may not be exposed in the waste layer 51 by pulling up the steel pipe 30. There is. In addition, since the steel pipe 30 is usually used by connecting a plurality of steel pipes of a predetermined length by welding or joints, if the steel pipe 30 is set to a length corresponding to the height at which the upper end steel pipe is pulled up in the process, The height of the pulled steel pipe 30 can be easily determined.

  After pulling up the steel pipe 30, an unnecessary upper end steel pipe is removed, concrete is placed on the upper end of the steel pipe 30, and the fixing member 52 is attached, and the steel pipe 30 remains in the waste layer 51. It fixes to this waste layer 51 [FIG.5 (e)]. The steel pipe 30 left in the waste layer 51 acts as an outer wall of the pumping well as it is.

  In the embedding process of FIG. 5, the steel pipe 30 to which the water flow pipe 20 and the lid body 10 are attached is directly embedded in the waste layer 51, but the steel pipe for drilling having a smaller diameter than the steel pipe 30 is discarded in advance. By screwing into the object layer 51 and confirming that the tip reaches the required depth, the work efficiency may be improved.

[Pumping method]
In the pumped well buried as shown in FIG. 5 (e), the groundwater is leached into the water flow pipe 20 exposed in the waste layer 51 at the tip of the well. Therefore, by inserting the tip of the hose into the water pipe 20 and pumping the other end to the pump, only the ground water in the region of the tip of the pumping well can be collected. Further, at this time, since waste and earth and sand are blocked by the water flow pipe 20, there is no concern that the collection of ground water is hindered by clogging with waste and earth and sand in the hose during the collection of ground water.

  In the pumping well according to the present invention, the steel pipe 30 used at the time of burial is left in the waste layer 51 as it is, so that it is extended upward by connecting a new steel pipe to the upper end of the steel pipe 30 exposed on the ground. Even when a new waste is dumped, there is no need to bury a separate pumping well and it can be used semi-permanently.

It is a disassembled perspective view of an example of the pumping well embedding apparatus used for this invention. It is the front-end | tip part schematic sectional drawing of the pumping well embedding apparatus of FIG. It is the figure which looked at the lid of Drawing 1 from the upper part. It is a perspective view which shows another form of the cover body used for this invention. It is process drawing of the embedding method of the pumping well of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cover body 11 Main body 12 Outer cylinder 13a, 13b Spiral blade 14a, 14b Tip blade 15 Through hole 18 Wire 19 Locking piece 20 Water pipe 21 Hard resin member 22 Perforated resin pipe 30 Steel pipe 31 Notch 32 Locking part 33 Tapered part 41a, 41b V-shaped blade 51 Waste layer 52 Fixing member

Claims (1)

A pumping well burying method at a waste disposal site,
A pumping well burying device comprising a hollow steel pipe, a lid body detachably attached to the tip of the steel pipe, and a water flow pipe inserted inside the steel pipe and having one end attached to the lid body, Turn the body downward, rotate the steel pipe and embed it in the waste layer.When the lid reaches a predetermined depth, remove the lid from the steel pipe, and move the steel pipe in the axial direction by a predetermined height. A pumping well burying method characterized in that a part of the water pipe is pulled up to be exposed in the waste layer, and the steel pipe remaining in the waste layer is used as an outer wall of the pumping well.

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