JP2017042690A - Waste volume reduction disposal method on waste disposal site and excavation body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an efficient execution of compaction hole formation (hole drilling) for waste volume reduction disposal by forming a compaction hole (non-discharge excavation drilling hole) on a disposal site with a high level of ground water such as a landfill disposal site.SOLUTION: An excavation apparatus equipped with an excavation mechanism that uses an excavation body 1, having an opening and closing puncture part 114 provided at the bottom end to turn into a reverse conical shape when closed, a plurality of compaction plates 113 provided downward to press excavated matters, a casing 12 of suitable length, and an airtight lid plate 13 provided at an upward opening part, to excavate under rotation by gripping the casing of an airtight excavation body (while supplying high air of predetermined pressure as needed) is configured by repeating excavation for forming an excavation hole of desired depth with no discharge and reclamation for casting wastes from the upper opening part of the casing with the airtight lid plate opened after the excavation, and for removing the casing with the opening and closing puncture part opened to fill an excavation hole with cast wastes.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a waste volume reduction processing method that realizes volume reduction of waste in a disposal site with a high groundwater level, such as a waste disposal site in a landfill.

  Waste that is not reused, such as general waste and industrial waste, is dumped in the waste disposal site, and dumping is simply performed on the previous waste, and the waste is sequentially stacked. It is. If left unattended, there is no reduction in volume other than natural compression by its own weight. For this reason, when the disposal site is full, another disposal site must be found.

  Therefore, in a waste disposal site, a compacted hole (non-discharge drilling hole) is formed by drilling and drilling without discharge using a drilled earth and sand compacted auger (excavated body) with a trowel on the outer periphery. A waste volume reduction processing method is known in which a consolidation hole becomes a waste waste space, and the space is discarded and filled.

  For example, in Patent Document 1 (Japanese Patent Application Laid-Open No. 10-272432), after forming a consolidation hole, waste is thrown in from the hole opening while the excavation body is inserted into the hole and rotated backward and pulled out. A means is disclosed in which a hole portion (consolidation plate) is pressed against a hole wall while dropping to the bottom, and the remainder is sequentially deposited on the hole bottom.

  Patent Document 2 (Japanese Patent Laid-Open No. 2001-286843) includes a casing body provided with a consolidation trowel (consolidation plate) on the peripheral surface, and a drilling rod having a drilling head that passes through the casing body and protrudes from the tip. There is disclosed a waste treatment method in which excavation body is used, non-discharge excavation is performed with a compacting iron of the casing body, surface layer waste is put into the casing body with the casing body left, and the casing body is later pulled out.

  In Patent Document 3 (Japanese Patent Laid-Open No. 2006-15262), after forming an exhaustless excavation hole and pulling out the auger, a casing body having a smooth outer peripheral surface is stood up in the excavation hole, and waste is put into the casing body. A processing method is disclosed in which the casing body is pulled out during or after charging.

  In Patent Document 4 (Japanese Patent Laid-Open No. 2014-205095), an excavation body in which a excavation portion having an opening / closing piercing portion is connected to the front portion of the casing body is used, and the casing body is held and rotational excavation is performed. A consolidation hole is formed by a drilling device equipped with a digging mechanism, dust is introduced from the upper opening of the casing body while the drilling body is buried, the opening and closing piercing portion is opened, and the drilling body (the drilling section and the casing body) is pulled out. Thus, a construction method for backfilling the excavation hole with garbage is disclosed.

  Patent Document 5 (Japanese Patent Laid-Open No. 2015-54275) discloses that, in the construction method employing the tip-opened casing body disclosed in Patent Document 4, a filling pressure is further applied to the waste thrown into the casing. Has been.

Japanese Patent Laid-Open No. 10-272432. JP 2001-286843 A. JP 2006-15262 A. JP, 2014-205095, A. JP, 2015-54275, A.

  Formerly, a method has been proposed to reduce the volume of waste by forming a waste disposal space by excavating a compacted hole (no discharge drilling hole). It may be used as a disposal site for building waste, incineration ash, and non-incineration waste. The ground of such a disposal site has a high groundwater level, and groundwater such as seawater and lake water penetrates into sedimentary waste, and the water and waste are saturated.

  For this reason, in the ground situation, even if the consolidation hole is excavated and formed, groundwater such as seawater immediately penetrates and the consolidation hole collapses. As a countermeasure against this, the applicant of the present application forms a consolidation hole by carrying out rotary excavation by holding a casing body connected to an excavation part having an opening / closing piercing part as disclosed in Patent Documents 4 and 5 described above. In the state where the casing is left as it is and the hole wall of the excavation hole is prevented from collapsing, waste is introduced from the upper opening portion of the casing body, the opening and closing piercing portion is opened, and the excavation body (excavation portion and casing body) is opened. A method of pulling out and filling the excavation hole with waste was proposed.

  However, even if the consolidation hole is formed using the excavation body, the groundwater may invade the casing body to the extent that the groundwater level of the landfill is reached when the excavation is completed. Even if waste is thrown into the casing in such a situation, lightweight waste (for example, waste plastic pieces) is lifted by buoyancy caused by groundwater, which hinders the work of throwing waste into the borehole. End up.

  Therefore, the present invention uses a new excavation body that can further cope with an intrusion groundwater problem and the excavation body in a waste disposal method using an excavation body constituted by an excavation part having an opening and closing piercing part and a casing body. This is a waste disposal method.

  An excavation body according to the present invention (Claim 5) includes an opening / closing piercing portion that has an inverted conical shape when closed at the lower end, a plurality of compaction plates that are provided below and press the excavated material against the hole wall, and an appropriate length. And a high-pressure air supply port provided at an appropriate position.

  A waste volume reduction processing method in a waste disposal site according to the present invention (Claims 1 and 2) uses the excavated body, and high-pressure air of a predetermined pressure is applied to a casing or excavated body of a sealed excavated body. The excavator is equipped with an excavation mechanism for holding the casing while rotating and excavating it. The excavator forms an excavation hole of a desired depth without discharge, and the sealing lid is opened after the excavation. In this case, the waste is introduced from the upper opening of the casing, the open / close pier is opened, the excavated body is pulled out, and the backfilling process for filling the excavation hole with the input waste is sequentially repeated by changing the excavation position. It is characterized by.

  Thus, when the excavator is used to form a consolidation hole at the waste disposal site, the excavator is in a sealed state (a place where it is difficult to have a completely sealed structure at the open / close pier, etc. Because it is not completely sealed due to the presence of micro-gap, it is almost completely sealed), so even if the drilling body reaches the depth of the layer containing groundwater, the drilling body The excavation work can be carried out with slight water immersion from the minute gap. Further, by supplying high-pressure air to the excavated body, the excavated body is filled with high-pressure air, and high-pressure air is released from the excavated body through the minute gap of the excavated body, thereby preventing entry of groundwater into the excavated body. .

  After the excavation is completed, the sealed lid plate is opened and waste is put into the excavated body (inside the casing). At that time, the sealed state is released and groundwater cannot be prevented from entering through the minute gap. Some infiltration does not interfere with waste input. When the waste input is completed, when the excavated body is pulled out, the opening / closing piercing portion is in an open state, and the input waste in the excavated body remains in the consolidation hole.

  Further, in the second aspect of the present invention, in particular, in the backfilling of the processing method, a rotary filler having screw blades is appropriately disposed in the excavation body during or after the introduction of waste. In this case, downward charging pressure is applied to the input waste.

  Thus, in the backfilling work, when necessary (during or after the introduction of the waste), the rotary filler is suspended in the excavation body, and the rotary filler is rotated to move the input waste below the excavation body. The density of the input waste is increased by filling the input waste, and the opening of the opening and closing pier is ensured when increasing the amount of input waste or withdrawing the casing.

  The present invention is as described above. When excavating a consolidation hole and putting waste into the consolidation hole, intrusion of groundwater into the excavation body even in a groundwater layer such as a landfill or in an unfavorable waste disposal site reaching below the sea level As much as possible, waste can be input into the excavated body under conditions where there is little intrusion of groundwater, enabling direct disposal of waste in landfills as well as volume reduction of waste. It is what I did.

The whole figure of the embodiment of the excavation body of the present invention. Sectional drawing of the principal part (opening-closing piercing part). The top view which cut off part of the principal part (sealing lid plate part). The front view which cut a part of the principal part (sealing lid plate part). Explanatory drawing of 1st embodiment of this invention construction method. Explanatory drawing of the second embodiment.

  Next, the apparatus used for 1st embodiment of this invention construction method is demonstrated. The apparatus for carrying out the method according to the present invention includes an excavation body 1, an installation excavation device 2, a compressor 3, a backhoe 4, and a crane device 5.

  The excavated body 1 shown as an embodiment includes an excavating part 11, a casing 12, and a sealing lid plate 13. The excavating part 11 is provided with a casing connecting part 112 at the upper end edge of the cylindrical main body 111, and on the outer peripheral surface. A compaction plate 113 is provided, and an opening / closing piercing portion 114 having an inverted conical shape when closed is provided at the lower end portion. A spiral blade 115 is provided below the consolidation plate 113.

  The casing 12 has the same diameter as that of the cylindrical main body 111, and is connected to the upper end opening 121 so that it can be opened and closed. The casing 12 is pivotally connected to the outer periphery on the casing 12 side as shown in FIG. A bolt body 122 that is rotatably mounted is provided, and a connecting arm portion 131 is projected to the outer periphery of the sealing lid plate 13, and a nut 123 that is screwed into the bolt body 122 is hooked on the connecting arm portion 131. It will be. Further, the hermetic lid plate 13 is provided with a high-pressure air supply port 132 and an operation handle 133 for performing an opening / closing operation.

  The excavator 2 is an existing installation type device called an all-round rotary excavator, and the compressor 3, the backhoe 4 and the crane device 5 use well-known existing equipment.

  The construction of the present invention construction method (first embodiment) involves excavation and backfilling. The excavator connects the excavation part 11 and the casing 12 and closes the upper opening of the casing with the sealing lid plate 13. Cover the excavator 1 in a substantially sealed state, attach the lid excavator 1 to the excavator 2, connect the compressor 3 and the high-pressure air supply port 132 as necessary, and supply high-pressure air into the excavator 1. While supplying, excavation is started at the planned excavation position of the excavation hole (FIG. 5A).

  The excavation is performed by the excavator 2 and is pushed into the accumulated waste A while rotating the excavated body 1, and the accumulated waste (or soft ground) A with the open / close piercing portion 114 of the excavation part 11 in a closed inverted conical shape. Then, the accumulated waste B is stirred and pushed up while being twisted into the accumulated waste A by the action of the spiral blade 115, and digging. At the same time, the hole wall is continuously pressed by the compaction plate 113 by this excavation to be in a compacted state, and compaction holes C are formed on the outer periphery of the casing 12.

  In this excavation, the excavated body 1 is sealed or supplied with high-pressure air of a predetermined pressure. Therefore, even if the excavated body 1 reaches the depth of the layer containing groundwater (including seawater), the excavated body 1 remains sealed. When the high-pressure air is further supplied, the high-pressure air is released from the gaps of the excavation body 1 through the minute gaps of the excavation body 1 and the groundwater enters the excavation body. Excavation will be carried out while blocking. When the excavated body 1 reaches a desired depth, the excavation is completed and the next backfilling is performed.

  The backfilling process releases the sealing with the sealing lid plate 13, opens the upper end opening 121, and collects the waste B collected by collecting the part, the waste brought into the disposal site and the surface waste from the disposal site, into the backhoe. 4 is used (FIG. 5B).

  After the excavation is completed, the sealing lid 13 is opened, and in the case of high pressure air supply, the supply is stopped. In this state, the function of preventing the intrusion of groundwater is not exhibited, but the infiltration of groundwater and the introduction of waste are simultaneously performed, and no trouble occurs in the introduction of waste B.

  When the introduction of the waste B is completed, the excavated body 1 is pulled out by the reverse operation of the excavator 2 (FIG. 5C). When the excavated body 1 is pulled out, the opening / closing piercing portion 114 is caused by its own weight. Is opened, and the input waste B in the excavated body 1 is left in the consolidation hole C.

  When the backfilling is completed, the excavator 2 moves to the next excavator position with the crane device 5 (FIG. 5D), and repeats the excavator and the backfill. As a result, the volume of waste at the waste disposal site is reduced, and a further amount of waste at the disposal site can be discarded.

  When the backfilling is insufficient at the backfilling site after completion of the backfilling operation, the accumulated waste A is collected by the backhoe 4 and the backfilling site is leveled (FIG. 5H).

  Next, a second embodiment of the method of the present invention shown in FIG. 6 will be described. This embodiment is different from the first embodiment in that the excavator 2a is self-propelled and further uses the rotary filler 6 and the rotary drive device. In the present embodiment, whether or not high-pressure air is supplied is arbitrarily determined, but will be described as an example of high-pressure air supply.

  The rotary filler 6 and the rotary drive device of the rotary filler 6 are connected to each other and suspended from the crane device 5a. The rotary filler 6 has a shape obtained by removing the excavation head from a general excavation auger. The shaft portion is provided with a skew blade. Further, the rotation drive device is provided with a rotation drive unit and rotationally driving the rotary filler 6.

  In the second embodiment, the self-propelled excavator 2a holds the excavated body 1 and, like the first embodiment, the excavated body 1 is hermetically sealed at a predetermined location, and high-pressure air is supplied into the excavated body 1. Excavation is carried out while supplying (Fig. 6A). Therefore, when excavating the consolidation hole C, intrusion prevention of groundwater into the excavated body 1 is performed.

  As in the first embodiment, the backfilling operation releases the sealing with the sealing lid plate 13 and opens the upper end opening 121, and collects the waste brought into the disposal site and the disposal layer surface waste. Waste B is thrown in using backhoe 4 (FIG. 6B).

  When the input waste B appropriately fills the inside of the excavated body 1, the rotary filler 6 suspended from the crane device 5 a is subjected to an appropriate rotation prevention treatment and is rotated while being inserted into the excavated body 1. When the rotary filling body 6 is filled and rotated (excavation reverse rotation), the charged waste B is pushed toward the inner bottom of the excavation body 1. Then, when the excavated body 1 is pulled out slightly upward, the input waste B is prevented from moving upward by the rotary packing body 6 and strongly pressed down, so that a strong opening pressure is applied to the opening and closing piercing portion 114, The opening / closing piercing portion 114 is surely opened.

  Of course, once the input waste B is mechanically filled with the rotary filler 6 during the backfilling operation, the input amount of the input waste B into the excavated body 1 can be increased.

  When the excavator 1 is pulled out from the consolidation hole C and the backfilling operation is completed, the excavator 1 is moved to the next excavator position by the self-propelled excavator 2a while holding the excavator 1 (FIG. 6D). If the backfill is insufficient, the accumulated waste A is collected by the backhoe 4 to level the backfill site (FIG. 6).

  Although the first embodiment and the second embodiment described above are examples of an excavated body including a single casing, the present invention may employ a plurality of casings. For example, a plurality of connectable casings can be realized by adopting an excavation body in which a sealing cover plate is detachably provided.

  In the excavator, excavation is performed while supplying high-pressure air with a single casing excavation body fitted with a sealing lid, and after excavating to a predetermined depth, the supply of high-pressure air is stopped once and the sealing lid is removed. The casing equipped with the hermetic lid plate is connected to the first casing and excavated while supplying high-pressure air again.

  When the above-mentioned multi-stage casing is adopted, it is impossible to prevent the penetration of groundwater into the excavated body during the casing connection operation, but it is practical if the amount of groundwater intrusion (exudation) during the casing connection operation is small. There will be no hindrance.

  Moreover, although each said embodiment made the example of the disposal site where the accumulation waste A exists, this invention method is applied also when burying a waste directly in a landfill site, In that case, it is the groundwater level. High soft ground is the target of excavation.

DESCRIPTION OF SYMBOLS 1 Excavation body 11 Excavation part 111 Cylindrical main body 112 Casing connection part 113 Consolidation board 114 Opening and closing piercing part 115 Spiral feather 12 Casing 121 Upper end opening part 122 Bolt body 123 Nut 13 Sealing cover board 131 Connecting arm part 132 High pressure air supply port 133 Operation handle 2, 2a Excavator 3 Compressor 4 Backhoe 5, 5a Crane device 6 Rotating filler A Accumulated waste B Input waste C Consolidation hole

Claims (6)

  Opening / closing piercing portion that has an inverted conical shape when closed at the lower end, a plurality of compression plates that are provided below and press the drilled material against the hole wall, a casing of an appropriate length, and a sealing lid provided at the upper opening location An excavator that has a drilling mechanism that rotates and excavates by holding a casing of a sealed excavated body using an excavated body including a plate, and forms a drilling hole of a desired depth without discharge And after the excavation, a back cover that opens the sealing lid and inputs waste from the upper opening portion of the casing, opens the opening and closing piercing portion, pulls out the casing, and fills the excavation hole with the input waste; Is a waste volume reduction treatment method in a waste disposal site, characterized by repeating the excavation position sequentially   Opening / closing piercing portion that has an inverted conical shape when closed at the lower end, a plurality of compression plates that are provided below and press the drilled material against the hole wall, a casing of an appropriate length, and a sealing lid provided at the upper opening location A drilling device equipped with an excavation mechanism for holding a casing and rotating excavation while supplying high-pressure air of a predetermined pressure to the excavation body using a drilling body equipped with a plate. Excavator to be formed without discharge, and after the excavator, the sealing lid is opened and waste is introduced from the upper opening of the casing, the open / close pier is opened, the casing is pulled out, and the excavation hole is inserted and discarded Waste volume reduction treatment method at a waste disposal site, characterized by the fact that the backfilling work that is filled with the material is sequentially repeated by changing the excavation position   In the backfilling process, a rotary filling body equipped with screw blades is appropriately suspended in the excavation body during or after the introduction of the waste, and a downward filling pressure is applied to the input waste. Item 1. Waste volume reduction treatment method in the waste disposal site according to item 1 or 2.   The excavator is a plurality of casings to which the casings of the excavated body can be connected, each of which is provided with a detachable sealing cover plate, and the casing is connected to form a drilling hole of a desired depth. Waste volume reduction method at any of the listed waste disposal sites.   An opening / closing piercing portion that has an inverted conical shape when closed at the lower end, a plurality of compression plates that are provided below and press the drilled material against the hole wall, a casing of an appropriate length, and a sealing lid provided at the upper opening portion An excavation body comprising a plate and a high-pressure air supply port provided at an appropriate site.   The excavation body according to claim 5, wherein the plurality of connectable casings are each provided with a sealing cover plate in a detachable manner.

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