JP2007098258A - Apparatus for burying air pipe, burying method, and method for stabilizing waste - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for efficiently burying an air pipe in a layer of waste to a desired depth without using water. <P>SOLUTION: The apparatus for burying an air pipe constituted of a hollow steel pipe 20, a lid body 10 attached to the distal end of the steel pipe 20, and an air pipe 30 inserted in the steel pipe 20 with its distal end attached to the lid body 10 comprises an engaging cylinder 13 having a roughly L-shaped notch with a tapered part formed on the L-shaped opening that allows a protrusion 21 disposed at the distal end of the steel pipe 20 on its inner circumferential wall to pass through the lid body 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for embedding a ventilation pipe in a waste layer in order to stabilize waste dumped at a waste disposal site, a device used therefor, and stabilization of waste using the device. It relates to the conversion method.

  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.

  As a method of embedding a ventilation pipe in such a waste layer, a method of drilling a waste layer using a drilling type boring machine and inserting a ventilation pipe has been adopted.

JP 2001-269640 A

  In the above-described method for burying the aeration pipe, when the waste layer is drilled by a boring machine, water is used and waste, earth and sand, etc. are discharged to the ground. Also, elution of water-soluble harmful substances has been a problem.

  Moreover, in the conventional method, the length (depth) of the ventilation pipe that can be embedded is about 5 m, and it is difficult to confirm the depth.

  Furthermore, it was required to increase the construction speed.

  The object of the present invention is to solve the above-mentioned conventional problems, efficiently embed a water pipe into a waste layer at a desired depth, and further deeper than before, without using water. It is an object of the present invention to provide an embedding apparatus and an embedding method for stabilizing a waste layer, and to provide a method for stabilizing a waste using the apparatus.

A first aspect of the present invention is a ventilation pipe comprising a hollow steel pipe, a lid body detachably attached to the tip of the steel pipe, and a ventilation pipe inserted inside the steel pipe and having a tip attached to the lid body. An embedded device of
The steel pipe has at least one protrusion inside the tip;
The lid has a lid plate that closes the tip of the steel pipe, and a fitting cylinder that projects to the steel pipe mounting side of the lid plate and has an outer diameter that is equal to or smaller than the inner diameter of the projection and equal to or smaller than the inner diameter of the steel pipe. And
When the fitting cylinder is inserted into the tip of the steel pipe and the steel pipe is rotated in one direction with respect to the fitting cylinder, the protrusion provided on the inside of the steel pipe passes through. A substantially L-shaped notch portion on which the fitting tube and the steel tube are locked;
The vent pipe embedding device is characterized in that the opening end located at the top of the L-shape of the notch portion is widened in a taper shape on the side opposite to the L-shaped horizontal line in the rotation direction of the steel pipe.

The second of the present invention is a method for burying a vent pipe in a waste disposal site using the vent pipe burying apparatus of the present invention,
Insert a vent pipe with a lid attached to the tip into the steel pipe, rotate the steel pipe in one direction with respect to the lid, and provide a protrusion on the inside of the steel pipe at the notch of the fitting cylinder provided on the lid. Lock and turn the lid downward in this state, rotate the steel pipe and screw it into the waste layer, and when the lid reaches a predetermined depth, rotate the steel pipe in the opposite direction, A method for embedding a ventilation pipe, wherein the steel pipe is pulled up in the axial direction while leaving the body and the ventilation pipe.

A third aspect of the present invention is a method for stabilizing waste in a waste disposal site using the above-described apparatus for embedding a ventilation pipe according to the present invention,
Insert a vent pipe with a lid attached to the tip into the steel pipe, rotate the steel pipe in one direction with respect to the lid, and provide a protrusion on the inside of the steel pipe at the notch of the fitting cylinder provided on the lid. Lock and turn the lid downward in this state, rotate the steel pipe and screw it into the waste layer, and when the lid reaches a predetermined depth, rotate the steel pipe in the opposite direction, By leaving the body and the ventilation pipe and pulling up the steel pipe in the axial direction, the ventilation pipe is embedded,
A method for stabilizing waste, wherein at least pressurized air is fed into the waste layer through the ventilation pipe.

  The embedding device according to the present invention is detachably attached by engaging a notch portion provided with a tapered portion in the opening and a protrusion provided on the steel pipe with a substantially L-shaped lid and steel pipe provided on the lid. Therefore, the lid can be easily detached from the steel pipe when the steel pipe is screwed into the waste layer and the steel pipe is pulled up while leaving the lid. There is no fear that the embedment distance of the ventilation pipe will be shortened or the embedment failure will not occur due to the detachment failure of the lid.

  Further, in the embedding method of the present invention, the ventilation pipe is attached to the lid and embedded at the same time as the screwing of the steel pipe, so that the screwing depth of the steel pipe becomes the embedding depth of the ventilation pipe as it is, and the confirmation of the depth is easy. The ventilation pipe can be reliably embedded to a predetermined depth.

  Therefore, it is possible to embed a ventilation pipe efficiently up to a predetermined depth, and the number of burials per day is greatly improved.

  Further, according to the present invention, waste or earth and sand in the waste layer is not discharged out of the layer without using water at the time of burying work, so that elution of harmful substances, discharged waste and earth and sand, etc. The processing problem does not occur.

  Therefore, according to the present invention, stabilization of the waste disposal site can be performed more quickly, reliably, and in a wide range.

  The embedding apparatus, embedding method, and stabilization method of the present invention will be described in detail with reference to preferred embodiments.

  FIG. 1 is a perspective view showing a preferred embodiment of the embedding device of the present invention. In the figure, 10 is a lid, 11a and 11b are V-shaped blades, 12 is a lid plate, 13 is a fitting cylinder, and 14 is a pipe. An attachment cylinder, 15 is a hole, 20 is a steel pipe, 21 is a projection, 30 is a ventilation pipe, 31 is an elastic body, and 32 is a nonwoven fabric. In addition, in order to show the internal structure, the steel pipe 20 in the figure is shown in a partially cutout state. Hereinafter, each member will be described.

[Cover 10]
The lid 10 is a member that attaches to the tip of the steel pipe 20 to close the steel pipe 20 and prevents the waste and earth and sand in the waste layer from entering the steel pipe 20. It is also a member which embeds the ventilation pipe 30 at the same time when the steel pipe 20 is screwed into the waste layer by being attached.

  FIG. 2 shows a front view (a), a side view (b), a top view (c), and a bottom view (d) of the lid 10 of this example.

  The lid body 10 of this example includes a lid plate 12 that closes the tip of the steel pipe 20 and V-shaped blades 11 a and 11 b that spread from the tip toward the lid plate 12 in a tapered shape. Each of the V-shaped blades 11 a and 11 b is attached radially from a normal line that penetrates the center of the lid plate 12 and has a right-angled triangle shape that tapers from the tip toward the lid plate 12. In this example, the triangle base 11b protruding from the cover plate 12 and 11a within the cover plate 12 are used in combination so that the cross-section is a cross shape. It is not limited, and the number and the shape of the cross section (an angle formed by two adjacent blades) can be appropriately changed as necessary.

  In this example, by using such a lid provided with V-shaped blades 11a and 11b, the V-shaped blades 11a and 11b efficiently push waste and earth and sand at the tip when the steel pipe is screwed. Encourage the progress of the steel pipe in the axial direction. In addition, since the V-shaped blades 11a and 11b do not protrude outward significantly from the steel pipe, waste does not get entangled in the blade, and therefore, the steel pipe can be screwed to a deeper depth than before. Can screw a steel pipe to a depth of up to about 30 m.

  The embedding device according to the present invention is characterized in that a fitting cylinder 13 for removably attaching the tip of the steel pipe 20 to the attachment side of the steel pipe 20 of the cover plate 12 is provided. The outer diameter of the fitting cylinder 13 is equal to or smaller than the inner diameter of the steel pipe 20 and is larger than the diameter corresponding to the tip of the protrusion 22 formed on the inner side of the tip of the steel pipe 20.

  The fitting tube 13 is formed with two substantially L-shaped notches, and when the fitting tube 13 is inserted into the steel pipe 20, the inside of the L-shaped vertical line of the notch is formed. The protrusion 21 in the steel pipe 20 passes, and further the steel pipe 20 is rotated in one direction with respect to the fitting cylinder 13, so that the protrusion 21 enters the L-shaped horizontal line (locking portion 13b) of the notch portion. The steel pipe 20 and the lid body 10 are locked.

  Furthermore, in the cutout portion formed in the fitting cylinder 13, one of the open ends of the L-shaped top portion, that is, the side opposite to the L-shaped horizontal line in the rotation direction of the steel pipe 20 extends in a tapered shape ( Tapered portion 13a).

  As described above, by adopting a configuration in which one end of the open end is tapered and the lid body 10 and the steel pipe 20 are locked by the substantially L-shaped cutout portion and the projection 21 of the steel pipe 20, the lid body 10 is fixed to the steel pipe 20. When the fitting tube 13 is inserted into the steel pipe 20, the steel pipe 20 can be rotated in one direction relative to the lid body 10 when the end of the steel pipe 20 reaches the lid body 12. Can be easily locked. Further, when the steel pipe 20 is pulled up while leaving the lid 10 after the steel pipe 20 is screwed, if the steel pipe 20 is pulled up while rotating in the opposite direction, the protrusion 21 that reaches the tapered portion 13a extends along the upper surface of the tapered portion 13a. Therefore, the lid body 10 is easily detached from the steel pipe 20 because the notch is easily removed.

  Furthermore, a pipe attachment cylinder 14 for attaching the ventilation pipe 30 to the inside of the fitting cylinder 13 is formed in the lid body 10 of this example. The mounting cylinder 14 has an outer diameter equal to or smaller than the inner diameter of the ventilation pipe 30. The mounting cylinder 14 is inserted into the ventilation pipe 30, and the hole 15 formed in the pipe mounting cylinder 14 and a hole (not shown) of the ventilation pipe 30. The ventilation pipe 30 may be fixed to the lid 10 through a wire or the like.

  The lid 10 according to the present invention is preferably formed of the same steel as the steel pipe 20 because it exhibits sufficient strength at the tip when the steel pipe 20 is screwed and remains in the waste layer. However, the present invention is not particularly limited to steel.

[Steel pipe 20]
As described above, in the steel pipe 20 according to the present invention, the protrusion 21 corresponding to the notch provided in the fitting cylinder 13 of the lid 10 is formed inside the tip. FIG. 3 shows a state where the steel pipe 20 is viewed from the tip.

  The steel pipe 20 used in the present invention is provided with a spiral protrusion 41 on the outside in the vicinity of the tip as in the steel pipe 20 ′ shown in FIG. It is also possible to promote screwing. When the protrusion 41 protrudes larger than the steel pipe 20 ′, waste may get caught in the protrusion 41 during the burying operation and hinder the burying operation. Therefore, the diameter of the protrusion tip is at most the steel pipe 20 ′. It is preferable to form it so as to be within about 1.2 times the diameter. Further, as shown in FIG. 4B, the steel pipe 20 'shown in FIG.

[Ventilation pipe 30]
The vent pipe 30 used in the present invention adjusts the inside of the waste layer to an aerobic environment by actively sending air or water into the waste layer through the vent pipe 30 after being buried in the waste layer. It is a member that promotes stabilization by microorganisms. Accordingly, the material is not particularly limited as long as it has good air permeability. However, a material having flexibility is easy to handle, and is attached to the lid 10 and inserted into the steel pipe 20. Sometimes it is easy to handle and good workability, which is preferable. Specifically, for example, a perforated pipe in which holes are uniformly formed in a vinyl chloride pipe can be mentioned. Particularly preferably, a spiral elastic body 31 is wound around a cylindrical nonwoven fabric 32 as shown in FIG. Specifically, “Canadren (registered trademark)” manufactured by Kanaflex Corporation can be mentioned. Since the ventilation pipe 30 is formed of the nonwoven fabric 32, the wire can be passed through any position when the ventilation pipe 30 is attached to the pipe attachment cylinder 14 of the lid 10. Moreover, since it can be made into the state wound up in roll shape, it can supply to a waste disposal site in roll shape, can be pulled out at the time of embedding work, and can be cut | disconnected and used for required length. Moreover, when cutting at the time of work, it is easy to change the embedded length.

[Embedding method]
Next, the method for burying a ventilation pipe according to 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, 52 is a drilling hole, and 53 is a filler.

  In the present invention, the end of the ventilation pipe 30 is attached and fixed to the lid body 10 (FIG. 5A), and then the ventilation pipe 30 is inserted into the steel pipe 20 to lock the steel pipe 20 to the lid body 10 [ FIG. 5 (b)]. Note that the air pipe 30 may be inserted into the steel pipe 20 first, the tip of the air pipe 30 may be attached to the lid body 10, and then the steel pipe 20 may be locked to the lid body 10.

  In the present invention, the lid 10 and the steel pipe 20 can be attached only by locking the protrusion 21 provided on the steel pipe 20 in the cutout portion of the fitting cylinder 13 provided on the lid 10. And can be installed easily without the need for tools.

  Further, in this example, the ventilation pipe 30 is formed of a non-woven fabric and has sufficient flexibility. The ventilation pipe 30 can be easily inserted into the inside 20. Accordingly, the steel pipe 20 can be attached to the screwing heavy machine in a state where the tip of the steel pipe 20 is tilted downward in advance, and the ventilation pipe 30 can be inserted from the lower end of the steel pipe 20.

  Next, the steel pipe 20 is screwed into the waste layer 51 while rotating the steel pipe 20 by a heavy machine [FIG. 5 (c)]. At this time, since the lid 10 having the V-shaped blade is attached to the tip of the steel pipe 20 in this example, the waste and the earth and sand are pushed away by the V-shaped blade, and it is easy without discharging the waste and the earth and sand to the outside. The steel pipe 20 can be screwed to a predetermined depth. Further, since the tip of the hollow steel pipe 20 is closed by the lid body 10, waste and earth and sand do not enter the steel pipe 20.

  The steel pipe 20 is pulled upward in the axial direction leaving the lid body 10 and the ventilation pipe 30 in the hole 52 (FIG. 5D). In the embedding device of the present invention, the protrusion 10 of the steel pipe 20 is merely engaged with the notch of the fitting cylinder 13 provided with the lid 10 and the steel pipe 20 on the lid 10, and the notch Since the taper portion 13a is formed at the opening end of the fitting tube 13, the protrusion 21 passes through the notch portion of the fitting tube 13 by pulling up while rotating the steel pipe 20 in the opposite direction to that when the steel tube 20 is attached to the lid body 10. The lid 10 is easily detached from the steel pipe 20.

  After pulling up the steel pipe 20, a lid (not shown) or the like is attached to the opening of the hole 52 as necessary to hold the ventilation pipe 30.

  In the embedding process of FIG. 5, the steel pipe 20 to which the ventilation pipe 30 and the lid body 10 are attached is directly screwed into the waste layer 51. By screwing into 51 and confirming that the tip reaches the required depth, it is possible to more easily grasp the inability to embed a ventilation pipe due to the contents of waste, etc., and to minimize the reduction in work efficiency .

[Stabilization method]
In the stabilization method of the present invention, the aerobic bacteria present in the waste layer 51 are activated by sending at least pressurized air into the waste layer 51 through the ventilation pipe 30 embedded by the above-described embedding method. To promote stabilization of waste by the aerobic bacteria. In addition, when wastes are dried by sending only pressurized air and the function of aerobic bacteria decreases, it is also preferable to supplement the necessary moisture by moistening the pressurized air. Alternatively, pressurized water may be separately fed from the ventilation pipe 30.

  Moreover, you may fill with the filler 53 between the drilling hole 52 and the ventilation pipe 30 as needed [FIG.5 (e)]. The filling 53 may be filled between the steel pipe 20 and the ventilation pipe 30 before the steel pipe 20 is pulled up, or may be supplied and filled in the gap between the hole 52 and the ventilation pipe 30 after the steel pipe 20 is pulled up. Good.

  As the filler 53, gravel and various additives are used. For example, when the waste layer 51 is contaminated with a volatile organic chlorine compound (VOC), reductive dechlorination can be achieved by filling with iron powder. Alternatively, when the waste layer 51 is contaminated with oil, a nutrient that activates microorganisms in the soil is packed as an additive and packed between the ventilation pipe 30 and the hole 52 together with the iron powder. It can be purified by pressurizing pressurized air from the ventilation pipe 30.

  Further, when the waste layer 51 is contaminated with heavy metal, another conductive pipe is inserted as an electrode between the drilling hole 52 and the ventilation pipe 30 in the two adjacent drilling holes. It is also possible to recover the heavy metal ions by flowing a current through the waste layer 51 by connecting a plus electrode to the other hole electrode and a minus electrode to the other hole electrode. .

  Furthermore, in the case where water accumulates at the bottom of the waste layer 51 and stabilization by aerobic bacteria remains, a large-diameter ventilation pipe is embedded using the burying apparatus of the present invention, and the ventilation It is also possible to drain by dropping a pump into the pipe.

It is a perspective view which shows the structure of preferable one Embodiment of the embedment apparatus of this invention. It is a figure which shows the cover body of the embedment apparatus of FIG. It is the figure which looked at the steel pipe of the burial device of Drawing 1 from the lower part. It is a figure which shows the other form of the steel pipe of the embedding apparatus of FIG. It is a figure which shows the embedding process of the ventilation pipe using the embedding apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,10 'Cover body 11a, 11b V-shaped blade 12 Cover plate 13 Fitting cylinder 13a Taper part 13b Locking part 14 Pipe attachment cylinder 15 Hole 20, 20' Steel pipe 21 Projection 30 Ventilation pipe 31 Elastic body 32 Nonwoven fabric 41 Projection 51 Waste layer 52 Drilling 53 Filling

Claims (3)

A vent pipe embedment device comprising a hollow steel pipe, a lid body detachably attached to the tip of the steel pipe, and a vent pipe inserted inside the steel pipe and having a tip attached to the lid body,
The steel pipe has at least one protrusion inside the tip;
The lid has a lid plate that closes the tip of the steel pipe, and a fitting cylinder that projects to the steel pipe mounting side of the lid plate and has an outer diameter that is equal to or smaller than the inner diameter of the projection and equal to or smaller than the inner diameter of the steel pipe. And
When the fitting cylinder is inserted into the tip of the steel pipe and the steel pipe is rotated in one direction with respect to the fitting cylinder, the protrusion provided on the inside of the steel pipe passes through. A substantially L-shaped notch portion on which the fitting tube and the steel tube are locked;
A vent pipe embedding device, characterized in that an opening end located at an L-shaped top portion of the cutout portion has a taper-shaped side opposite to the L-shaped horizontal line in the rotation direction of the steel pipe. A method for burying a vent pipe in a waste disposal site using the vent pipe burying device according to claim 1,
Insert a vent pipe with a lid attached to the tip into the steel pipe, rotate the steel pipe in one direction with respect to the lid, and provide a protrusion on the inside of the steel pipe at the notch of the fitting cylinder provided on the lid. Lock and turn the lid downward in this state, rotate the steel pipe and screw it into the waste layer, and when the lid reaches a predetermined depth, rotate the steel pipe in the opposite direction, A method for embedding a ventilation pipe, wherein the steel pipe is pulled up in the axial direction while leaving the body and the ventilation pipe. A method for stabilizing waste in a waste disposal site using the vent pipe embedding device according to claim 1,
Insert a vent pipe with a lid attached to the tip into the steel pipe, rotate the steel pipe in one direction with respect to the lid, and provide a protrusion on the inside of the steel pipe at the notch of the fitting cylinder provided on the lid. Lock and turn the lid downward in this state, rotate the steel pipe and screw it into the waste layer, and when the lid reaches a predetermined depth, rotate the steel pipe in the opposite direction, By evacuating the steel pipe in the axial direction leaving the body and the ventilation pipe, the ventilation pipe is embedded in the waste layer,
A method for stabilizing waste, wherein at least pressurized air is fed into the waste layer through the ventilation pipe.

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