JP5623583B2 - Waste disposal method and excavated body at waste disposal site - Google Patents

Description

  The present invention relates to a waste disposal method that realizes volume reduction (expansion of disposal space) and buried disposal in a poorly disposed waste disposal site that generates soft ground such as landfill or groundwater, and the waste disposal method. The present invention relates to an excavation body to be used.

  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 drilled earth and sand compacted auger (excavated body) with a trowel on the outer periphery is used to form a consolidated hole by excavating and drilling without discharge. 2. Description of the Related Art There is known a waste processing method that forms a waste space and discards and fills the space with waste.

  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) discloses a excavation comprising a casing provided with a consolidation trowel (consolidation plate) on the peripheral surface and a drill rod having a drill head passing through the casing and protruding from the tip. A waste processing method is disclosed in which a body is used, non-discharge excavation is performed with a compacting trowel of the casing, surface layer waste is put into the casing with the casing remaining, and the casing is later pulled out.

  In Patent Document 3 (Japanese Patent Application Laid-Open No. 2006-15262), after forming an exhaustless compaction hole and pulling out the auger, a casing having a smooth outer peripheral surface is set up in the compaction hole, and waste is charged into the casing. However, a processing method is disclosed in which the casing is pulled out after filling.

  Further, Patent Document 4 (Japanese Patent Application Laid-Open No. 2008-302273) discloses a drilling head in which an inverted frustoconical drilling part is provided at the tip of a cylindrical body provided with a consolidation iron part, and a continuous connection with the drilling head. A waste treatment method is disclosed in which a compact hole is formed and held with the casing and the excavation member is pulled out, and then waste is put into the compact hole.

Japanese Patent Laid-Open No. 10-272432. JP 2001-286843 A. JP 2006-15262 A. JP 2008-302273 A.

  In the ground situation of the waste disposal site, when the above-described consolidation hole is formed, there is a case where groundwater enters the consolidation hole immediately. Especially in landfill waste disposal sites, when the landfill was done with waste such as dredged soil, building waste and incineration ash, the ground itself was not dense and the accumulated waste reached below sea level. Even if the above-mentioned consolidation hole is formed by excavation, seawater immediately permeates and the consolidation hole collapses.

  Even if the construction method described in Patent Document 1 is adopted under the above circumstances, the hole wall of the consolidation hole is not retained by the casing, and therefore there is a possibility that the hole wall of the consolidation hole may collapse during the waste charging operation. . Moreover, there is a waste of pulverizing the accumulated waste with the tip bit of the excavated body to form a consolidated hole, and in the state where the excavated body (auger shaft) exists in the excavated consolidated hole, There is a problem in terms of work efficiency, for example, because the cross-section to the bottom of the hole is narrow and waste input is not efficiently performed.

  Further, in a waste disposal site where there is a groundwater problem, there is a possibility that the consolidation hole may collapse before the casing is installed by means of introducing the casing into the consolidation hole after forming the consolidation hole as in the construction method described in Patent Document 3. In addition, as in the construction method described in Patent Document 4, the method based on the assumption that the excavated body is pulled out and the shape of the consolidated hole itself is maintained cannot be established due to the collapse of the consolidated hole.

  Further, as in the waste treatment method described in Patent Document 2, the means for throwing in waste while leaving the casing can cope with the groundwater problem, but the excavating body is a excavation section comprising a casing, a excavation rod and an excavation rod. Therefore, the rotary drive device also requires a drill rod driving mechanism at the time of excavation compaction and a casing drive mechanism at the time of pulling out the casing, which complicates the entire apparatus.

  Therefore, the present invention proposes a novel excavation body that can cope with the groundwater problem and a waste treatment method using the excavation body.

An excavation body according to the present invention (Claim 4) includes an excavation part and one or a plurality of casings, and the excavation part provides a casing connection part at the upper end edge of the cylindrical main body, and presses the excavated material against the hole wall. A connecting portion that includes a plurality of compaction plates , and has an opening / closing piercing portion that has an inverted conical shape when closed at the lower opening, and the casing is continuously connected to the upper and lower edges of the excavating portion or other casing. It is characterized by providing. Furthermore, the excavated body of the present invention (Claim 5) is provided with stirring blades arranged in a spiral intermittently below the formation position of each compaction plate on the outer peripheral surface of the excavated part in the excavated body. .

  The waste disposal method in the waste disposal site according to the present invention (Claim 1) uses the excavation body, and connects the excavation part to the front part of the casing, and holds the casing to rotate and excavate. Excavator with a mechanism to form an excavation hole with a desired depth without discharge, and after the excavation, waste is introduced from the upper opening of the casing and the opening and closing pierce is opened. Thus, the casing is pulled out in order and the backfilling work for filling the excavation hole with waste is sequentially repeated by changing the excavation position.

  Thus, the excavated body is used to form a consolidation hole at the waste disposal site, and waste is input while leaving the excavated body as it is, so the consolidation is performed to a depth that reaches the layer containing groundwater (including seawater). Even if the hole is formed, it becomes possible to input the waste in a state where there is no risk of collapse of the hole wall of the consolidation hole, and by pulling out the excavated body with the opening and closing piercing part opened, the input waste in the excavated body is Left in the consolidation hole.

  Further, the present invention uses a drilling body provided with stirring blades arranged in a spiral intermittently below the formation position of each compaction plate on the outer peripheral surface of the excavation part, and stirs and consolidates the hole wall structure during excavation. In this way, no discharge excavation holes are formed, and no discharge consolidation holes can be quickly constructed.

  The present invention is as described above, and when the consolidation hole is excavated and waste is put into the consolidation hole, the consolidation hole is maintained even in a groundwater layer such as a landfill or a waste disposal site that reaches under the sea level. In addition to waste volume reduction processing, direct waste burying processing in landfills and the like has also been realized.

The front view of embodiment of the excavation body of this invention. Explanatory drawing (excavator) of embodiment of this invention construction method. The figure (backfilling). The figure (at the end). The figure (continuous construction).

  Next, an embodiment of the method of the present invention will be described. The implementation apparatus of the present invention includes an excavation body 1, an excavation apparatus 2, a backhoe 3, and a crane apparatus 4.

  The excavation body 1 shown as an embodiment is constituted by an excavation part 11 and two casings 12a and 12b.

  The excavation part 11 is provided with a casing connection part 112 at the upper end edge of the cylindrical main body 111, an agitation blade 113 and a compaction plate 114 on the outer peripheral surface, and an opening / closing piercing part 115 at the lower end part.

The stirring blade 113 has an outer diameter corresponding to the excavation hole (consolidation hole) A and is provided spirally and intermittently. A plurality of the compaction plates 114 are provided above the stirring blades 113 so that the end in the rotational direction has a diameter corresponding to the excavation hole A and sequentially upwards corresponding to the rotational direction, and a part thereof overlaps in the vertical position. Thus, the excavated material is pressed against the hole wall , and the opening / closing piercing portion 115 has an inverted conical shape when closed at the lower opening of the cylindrical main body 111.

  The casings 12a and 12b have the same diameter as the cylindrical main body 111, and are provided with connecting parts 121 connected to the excavation part 11 and the other casings 12a and 12b continuously at the upper and lower ends.

  The excavation apparatus 2 is an existing apparatus called an excel machine, and includes an excavation mechanism 21 that holds the casings 12a and 12b and rotates and excavates them. The backhoe 3 and the crane apparatus 4 use well-known existing equipment.

  Next, implementation of the present invention construction method (construction work) will be described using the above-described implementation apparatus. In the embodiment, the disposal site where the accumulated waste B exists is taken as an example. However, the present construction method is also applied to the case where the waste is buried directly like a landfill, in which case the excavation target is soft. It becomes the ground.

  The construction method according to the present invention involves excavation and backfilling. The excavator attaches the excavation body 1 connecting the excavation part 11 and the casing 12a to the excavation mechanism 21 of the excavation apparatus 2 to form the excavation hole. Drilling is started at the planned drilling position.

  The excavation is performed by the excavating device 21 while the excavating body 1 is rotated, and the opening / closing piercing portion 115 of the excavating part 11 bites into the accumulated waste (or soft ground) B in the closed conical state, and further The accumulated waste B is agitated and pushed up while being twisted into the accumulated waste B by the action of the stirring blade 113 to dig. By this excavation, the hole wall is continuously pressed by the compaction plate 114 to be in a compacted state.

In particular, since the casings 12a and 12b have the same diameter as the cylindrical main body 111, a gap is formed between the hole wall of the consolidation hole A , the excavation body 1 is smoothly advanced, and the consolidation hole A is formed by the casing 12a. Even if the hole wall is somewhat collapsed, the excavation hole is maintained.

  When excavation progresses to some extent, the casing 12b of the next stage is lifted and connected to the casing 12a by the crane device 4, and further excavation is performed to a predetermined depth, thereby completing the excavation work (FIG. 2).

  After the excavator, the waste C obtained by collecting the waste brought into the disposal site and the surface layer waste from the disposal site is introduced from the upper opening portion of the casing 12 b using the backhoe 3. When charging the waste C, if the input waste D is filled with the weight suspended by the crane device 4, a larger amount of the waste C can be input.

  When a certain amount of waste C is thrown in, the opening / closing piercing portion 115 of the excavating body 1 is opened, and when the excavating mechanism 21 is reversed to move the excavating body 1 upward, the thrown waste D is directly put into the consolidation hole A. Will remain.

  When the casing 12b is exposed as the excavated body 1 is raised, the connection of the casing 12b is released and the casing 12b is suspended and removed by the crane device 4, and the waste C is again introduced from the upper opening of the casing 12a (FIG. 3). When the consolidation hole A is filled with the input waste D, the entire excavated body 1 is pulled out and the backfilling operation is completed (FIG. 4).

  After completing the excavation and backfilling, move to the next planned excavation position, carry out the next excavation and backfilling in order, and repeat this to complete the waste disposal site In this way, a larger amount of waste can be discarded (FIG. 5).

  In particular, according to the present invention, waste is provided in the consolidation hole A while the formed consolidation hole A is protected by the excavating body 1, so that the waste provided in a landfill or the like where the consolidation hole is likely to collapse. Even at the disposal site, it is possible to reduce the volume of waste without any problem, and it is possible to reduce the volume of waste into the compaction hole A continuously in the vicinity, improving work efficiency. is there.

DESCRIPTION OF SYMBOLS 1 Excavation body 11 Excavation part 111 Cylindrical main body 112 Casing connection part 113 Spiral blade 114 Consolidation board 115 Opening and closing piercing part 12a, 12b Casing 121 Connection part 2 Excavator 21 Excavation mechanism 3 Backhoe 4 Crane apparatus

Claims (6)

In a waste disposal site, an excavation part provided with a plurality of compaction plates for pressing the excavated material against the hole wall at the tip of a predetermined casing, and provided with an opening / closing piercing part having an inverted conical shape when closed at the lower opening. An excavator having an excavating mechanism for holding and rotating excavating a casing using a connected excavation body, an excavator for forming a drilling hole of a desired depth without discharge, and a casing after the excavator In addition to throwing in waste from the upper opening location, opening and closing the pierced part and pulling out the casing in order, and backfilling to fill the excavation hole with waste, changing the excavation position and repeating sequentially A waste treatment method in a waste disposal site characterized by   A stirring blade arranged in a spiral intermittent manner is provided below the formation position of each compaction plate on the outer peripheral surface of the excavation part, and the no-hole excavation hole is formed by stirring and compacting the hole wall surface structure during excavation. Waste disposal method at the stated waste disposal site. The waste according to claim 1 or 2, wherein in the backfilling work, the waste at the waste disposal site is scraped by a backhoe and put into the casing, and the input waste is filled with a weight suspended by a crane device. Waste disposal method at the waste disposal site. The excavation part is composed of an excavation part and one or a plurality of casings. The excavation part is provided with a casing connection part at the upper end edge of the cylindrical main body, and includes a plurality of compaction plates that press the excavated material against the hole wall. An excavation body comprising an opening / closing piercing portion having an inverted conical shape, wherein the casing is provided with a connecting portion continuously connected to the excavation portion or another casing at upper and lower end edges thereof.   The excavation body according to claim 4, wherein stirring blades arranged in a spiral intermittent manner are provided below the formation position of each compaction plate on the outer peripheral surface of the excavation part.   The excavation body according to claim 4 or 5, wherein the cylindrical main body and the casing of the excavation part have the same diameter.

Images