JP3566890B2 - Fixed type sorting device and mud water reuse system in mud shield method with this fixed type sorting device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fixed sorting apparatus and a mud water recycling system in a mud-shielding method including the fixed sorting apparatus. Excavation in the ground while injecting into the face from the tip of the fixed, sorting equipment used in the mud shield method of propelling while taking the excavated mud containing the mud material into the excavator and then propelling while carrying out to the ground, and The present invention relates to a muddy water reuse system in a muddy shield construction method equipped with this fixed type sorting device.
[0002]
[Prior art]
Conventionally, when constructing horizontal shafts such as tunnels or sewer pipes, shield methods such as earth pressure type semi-shield method and muddy water type semi-shield method have been used. Widely adopted. When a tunnel or the like is constructed by such a construction method, a large amount of residual soil (mud or excavated soil) is generated by excavating the ground, and such a mud is formed with a large amount of moisture depending on the construction site conditions and construction method. Often contains. For example, in the muddy water semi-shield construction method, since excavation is performed by sequentially injecting pressurized water or muddy water into the excavating face, a large amount of moisture is contained in the mud that passes through the excavator and is conveyed to the ground. included.
[0003]
By the way, in each of the above-mentioned construction methods including the above-mentioned muddy water semi-shield construction method, a large amount of residual soil is generated, and such residual soil is treated as industrial waste. Therefore, it is desired in the industry to reuse it. That is, conventionally, in order to transport and dispose of a large amount of residual soil and earth and sand generated by excavation work, a vehicle such as a truck is required, and after the treatment of muddy water is entrusted to an intermediate treatment company and classified and dewatered. Dewatered sludge must be transported to a final disposal site for disposal, which increases the construction cost of the entire construction.
[0004]
Therefore, in order to solve such a problem, a system described in JP-A-8-105290 has been proposed in the above-mentioned muddy water semi-shield method, for example. This system reuses excavated earth and sand in the muddy water shield construction method.Specifically, a plurality of plants for separating and processing the components contained in the muddy water are provided and recycled from this plant. The muddy water is supplied to the tip of the excavator again through the transport pipe.
[0005]
[Problems to be solved by the invention]
However, in the above-described technology, there is a possibility that it can be reused in the case of the muddy water (semi) shield method, but it cannot always be effectively reused in the muddy shield method. That is, in the mud shield method, since the mud (remaining soil) taken into the excavator from the tip of the excavator contains a mud material containing water and a plugging material, the mud material is mixed. The filter material or the filter is clogged by the plugging material, and muddy water to be circulated and reused cannot be efficiently collected.
[0006]
Therefore, the present invention has been proposed in order to solve the problems of the above-mentioned conventional mud water recycling system, and is a mud shield method in which a mud material containing a plugging material is injected into a face. The purpose of the present invention is to provide a fixed sorter capable of effectively reusing muddy water and a muddy water reuse system in a mud shield construction method equipped with the fixed sorter, even in the case of is there.
[0007]
[Means for Solving the Problems]
The present invention has been proposed to solve the above-mentioned problems, and the first invention (the invention according to claim 1) relates to a fixed type sorting apparatus, in which mud containing water is introduced. A filter body provided with a filter body composed of a spiral spring formed in a substantially cylindrical shape and disposed in a treatment tank to be processed, a conduit for discharging muddy water flowing into the filter body, and a conduit inside the conduit. A flow rate detecting device for detecting a flow rate of the inflow mud, a solenoid valve disposed in a middle portion of the conduit, a pumping device for pumping a fluid from the other end of the filter body into the filter body, An expansion / contraction drive device that expands / contracts the entire length of the filter body, and when the flow rate of the muddy water by the flow rate detection device is smaller than a predetermined flow rate, the electromagnetic valve is closed, and the filtration device is driven by driving the pressure feeding device. While pumping fluid from the other end of the main body, In which somewhat telescopic driving device to the elongate is characterized by comprising configured to drive the full length of the filter body immediately after feeding.
[0008]
According to the first aspect of the invention, when the flow rate of the muddy water by the flow rate detection device is lower than a predetermined flow rate, that is, when the plugging material adheres to the periphery of the filter body and filtering cannot be performed sufficiently, the electromagnetic valve is closed. Then, the fluid is pumped from the other end of the filter body by driving the pumping device. This fluid may be air or water, but in any case, the fluid is discharged from the inside of the filter body composed of the spiral spring by the pressure feeding of such fluid. At this time, since the expansion and contraction drive device is driven to make the entire length of the filter body slightly longer immediately after the fluid is pumped, when a plugging material or the like is attached between the spiral springs which are the filter body. However, the plugging material and the like can be effectively removed.
[0009]
Further, the second invention (the invention according to claim 2) relates to a mud water recycling system in a mud shield method, in which a mud material containing water and a plugging material is supplied to a tip of an excavator. In the mud shield method in which the ground is excavated while being injected into the face, the mud containing the excavated material is taken into the excavator and then propelled while being carried out to the ground. A plurality of sorting devices for sequentially sorting mud containing the mud material according to the particle size of the contents of the mud are provided, and the plurality of sorting devices are provided in a processing tank into which mud containing moisture is charged. A filter body provided with a filter body composed of a spiral spring formed in a substantially cylindrical shape, a conduit for discharging muddy water flowing into the filter body, and a flow rate of muddy water flowing into the conduit And a flow detector that detects A fixed type sorting device comprising: a solenoid valve provided; a pumping device for pumping fluid from the other end of the filter body into the filter body; and a telescopic drive device for expanding and contracting the entire length of the filter body. And the muddy water filtered by the sorting device including the fixed sorting device is sent to the tip of the excavator after the plugging material is added.
[0010]
According to the second aspect, when the plugging material adheres to the outside of the filter and the filter cannot be sufficiently filtered, the solenoid valve is closed, and the fluid is pumped from the other end of the filter body by driving the pumping device. Then, fluid is discharged from the inside of the filter body composed of a spiral spring. At this time, the expansion and contraction drive device is driven to make the overall length of the filter body slightly longer immediately after the pumping of the fluid. Even when a plugging material or the like is attached between the spiral springs as the main body, the plugging material or the like can be effectively removed. Therefore, according to the second aspect, it is possible to prevent adverse effects due to the plugging material.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
The following describes stationary sorting device for use in mud concentrated expression mud recycling system in shield method and the mud recycling system according to the implementation of the embodiment of the present invention.
[0017]
As shown in FIG. 1, a mud water recycling system (hereinafter, referred to as the present system) in the mud-type shield construction method injects a mud material into a face from the tip of an excavator 1 and muds the excavated mud. The material is taken into the excavator 1 together with the material, passed through the propulsion pipe 2 continuous to the rear of the excavator 1, and transported from the shaft 3 to the ground. The muddy water and the like are separated and separated, and the muddy water taken out by the separating device 4 is filled with a plugging material and injected again from the tip of the excavator 1.
[0018]
The excavator 1 is provided with a cutter head 5 at the tip, and a number of cutter bits 6 for excavating a face are fixed to the front of the cutter head 5. The cutter head 5 is arranged in the excavator 1. It is configured to be rotationally driven by a provided motor (not shown). Then, from the tip of the excavator 1 configured as described above, the mud material is injected and injected into the face. This mud material is filled in a mud material tank 7 provided on the ground, and is pumped to the tip of the excavator 1 through the transfer passage 8 by driving a pump (not shown). . The mud material also contains a plugging material made of a fine fibrous substance made of paper or the like. Therefore, when the mud material containing this plugging material is injected into the face, it penetrates widely from the face facing the front of the cutter head 5 like muddy water used in the muddy shield construction method. As a result, the face can be prevented from becoming unstable. That is, when the plugging material contained in the mud material is injected into the face from the tip of the excavator 1, the plugging material blocks between the particles of the gravel and prevents the permeation of moisture over a wide area. As a result, the face can be kept in a stable state.
[0019]
In the present system, mud (such as earth and sand) generated by excavation by rotating the cutter head 5 while injecting such a mud material into the face is formed on the cutter head 5 (not shown). After passing through the opening, it is taken into the excavator 1 and transported from the excavator 1 to the ground via a sludge discharge channel 9 passing through the following propulsion pipe 2. A sorting device 4 for sorting the conveyed mud is provided on the ground. In addition, the mud contains a mud material containing the plugging material in addition to the gravel, clay and the like excavated by the excavator 1. Hereinafter, the sorting device 4 will be described in detail.
[0020]
As shown in FIG. 2, the sorting device 4 is provided with a charging tank 10 into which the mud is charged, and a first processing tank 11 is disposed below the charging tank 10. The charging tank 10 has a dropping mechanism such as a shutter (not shown) for dropping the mud thrown into the charging tank 10 or a mud in a first processing tank 11 formed below by rotating the charging tank 10. A rotating mechanism for dropping is provided. In the first processing tank 11, a sorting plate 12 fixed in an inclined state is provided. In the present embodiment, the sorting plate 12 captures a substance having a particle diameter of 20 mm or more, such as gravel or stone, and the captured gravel is dropped leftward in FIG. Therefore, the slurry, sand, and the like that have passed through the sorting plate 12 are filled into the first treatment tank 11.
[0021]
A second processing tank 13 which is a component of the sorting device 4 is disposed next to the first processing tank 11. The first processing tank 11 includes the first processing tank 11. A first pump 14 for transferring the slurry or sand in the processing tank 11 into the second processing tank 13, and one end is connected to the first pump 14 and the other end is the second processing tank. A first conduit 15 connected to 13 is provided. Above the second processing tank 13, a fixed type sorting device (spring type sorting device) 50 according to the present invention is provided.
[0028]
This fixed type sorting device (spring type sorting device) 50 includes a sorting tank 51 communicating with the tip of the first conduit 15 and a sorting device main body 52 provided in the sorting tank 51 in a plurality. Have. The sorting tank 51 includes a partition plate 51a below, and a shutter 51c that can be opened and closed is formed on a bottom plate portion 51b facing the partition plate 51a. As shown in FIG. 3 , the sorter main body 52 has a spiral spring 53 and a concave portion (not shown) into which the upper end of the spiral spring 53 is inserted, and a bolt blow-by gas 54a is formed on the upper surface. One rotating operation member 54 formed with a tube portion 54b communicating with the concave portion, and a concave portion 55a on the upper surface into which the lower end of the spiral spring 53 is inserted, and a lower surface formed on the lower surface The other rotating operation member 55 having a bolt portion 55b and a tube portion 55c communicating with the concave portion 55a is a component. The one rotating operation member 54 is connected to one connecting fitting 57 via one washer 56 therebetween, and the one connecting fitting 57 is connected to a branch pipe 64 formed in an air pipe 63 described later. Is linked to Further, the other rotating operation member 55 is connected to the other connecting metal fitting 59 via the other washer 58 therebetween, and the other connecting metal fitting 59 is connected to a branch pipe 60a formed in a discharge pipe 60 described later. Is linked to That is, a screw 57a is formed on the inner peripheral surface of the one connection fitting 57, and the screw 57a and the bolt portion 54a constituting the one rotation operation member 54 are connected to each other by being screwed. Further, a screw 64a formed on the outer peripheral surface on the lower end side of the branch pipe 64 formed in the air pipe 63 and the screw 57a are connected to each other by screwing.
[0029]
Further, a screw 59a is formed on the inner peripheral surface of the upper other connection fitting 59, and the screw 59a and the bolt portion 55b constituting the other rotation operation member 55 are connected to each other by being screwed. In addition, a screw 61a formed on the outer peripheral surface on the upper end side of the branch pipe 61 formed on the discharge pipe 60 and the screw 59a are connected to each other by screwing. Therefore, the sorting device main body 52 is operated by rotating the one rotation operation member 54 and / or the other rotation operation member 55, and the helical spring 53 is contracted or compressed by being compressed. By slightly releasing the state, the distance between the springs that are elongated and formed on the spiral spring can be adjusted.
[0030]
The filter body 52 is connected to a plurality of branch pipes 61 formed in the discharge pipe 60 via the other connection fitting 59. Therefore, the muddy water filtered by the filter body 52 flows into the discharge pipe 60 through each branch pipe 61 and is transferred into the mud material tank 7. Further, the filter body 52 is connected to a plurality of branch pipes 64 formed in the air pipe 63 via the one connection fitting 57. The air pipe 63 has a base end connected to a compressor (not shown). Compressed air sent from the compressor flows into the branch pipes 64 from the air pipe 63 and flows into the filter body 52. Flows into. A vibrating plate 67 for vibrating each of the air tubes 63 and the filter body 52 is disposed above the sorting tank 51, and a vibrating device 68 is provided at a base end of the vibrating plate 67. A second solenoid valve (not shown) is provided in the middle of the air pipe 63, and a first solenoid valve 65 and a flow sensor are provided in a middle of the discharge pipe 60. The first and second solenoid valves 65 and the flow rate sensor are connected to a controller (not shown), and when the flow rate of the muddy water in the discharge pipe 60 is less than a predetermined flow rate, the first By closing the solenoid valve 65 and opening the second solenoid valve (not shown), the plugging material attached to the outer periphery of each filter body 52 is dropped off by the compressed air from the compressor and can be filtered again. .
[0031]
Note that a discharge pipe 66 for discharging the sand and the plugging material accumulated in the separation tank 51 is formed slightly above the partition plate 51a in the separation tank 51, and below the partition plate 51a. Since the shutter 51c described above is formed, the sand and the plugging material dropped below the partition plate 51a are opened by opening the shutter 51c as shown by a two-dot chain line in FIG. Can be dropped into the processing tank 13.
[0032]
Accordingly, the resolver Ne-based separation device 50 to configure the sorting device 4, (including sand and weather stripping material, etc.) that has flowed into the first conduit 15 in the sorting chamber 51 through the mud, the first While flowing into the sorting tank 51 by the driving force of the pump 14, it is also filtered and sorted by the plurality of filter bodies 52 having the spiral spring 53 as a component, flows into the drainage pipe 60, and flows into the mud material tank 7. And is reused. During such an operation, when the plugging material adheres to the outer periphery of the spiral spring 53 constituting the filter body 52 and the filtering is not performed or the filtering ability is reduced, the compressed air is discharged as described above. After flowing into the filter body 52, the plugging material is forcibly removed. In particular, the helical spring 53 constituting the filter body 52 adjusts the spring interval by rotating the one or other rotating operation members 54 and 55 to expand and contract the entire length of the helical spring. Therefore, it is possible to provide the most effective filter body corresponding to mud and muddy water to be filtered and sorted.
[0033]
Further, the spring-type sorting device 50 may use, for example, a spring-type sorting device 70 shown in FIG. 4 without using the above-described configuration. The spring type sorting device 70 has a filter body 73 disposed at an intermediate position of a treatment tank 72 into which muddy water containing a plugging material flows through a conduit 71 as a constituent element. The filter body 73 includes a spiral spring 74 having the same configuration as that of the spring type sorting device 50, one cap 75 into which the upper end of the spiral spring 74 is inserted, and a lower end of the spiral spring 74. The other side is inserted, and the other cap 76 having an opening (not shown) communicating with the inside of the spiral spring 74 is formed as a component. The other cap 76 is connected to a drain pipe 78 via a connecting pipe 77 communicating with an opening formed in the other cap 76. The drain pipe 78 is provided with a first solenoid valve 79, a pump 80, and a flow rate sensor 81, and is connected to the mud tank 7 shown in FIG.
[0034]
On the other hand, a hydraulic cylinder 82 as a telescopic drive device constituting the present invention is fixed above the filter body 73, and the tip of a cylinder rod 82a of the hydraulic cylinder 82 is in contact with the upper surface of the one cap 75. Fixed. Accordingly, the entire length of the spiral spring 74 is expanded and contracted by driving the hydraulic cylinder 82, and the spring interval of the spiral spring 74 is automatically adjusted by the expansion and contraction. Further, the one cap 75 is connected to a compressor 84 via an air pipe 83, and a second solenoid valve 85 is provided in a middle part of the air pipe 83. The first solenoid valve 79, the flow rate sensor 81, the hydraulic cylinder 82, and the second solenoid valve 85 that constitute the spring type sorting device 70 are electrically connected to a controller 86, respectively. The device 70 is operated by the controller 86.
[0035]
First, when the mud containing the plugging material flows into the treatment tank 72 through the conduit 71, substances having a relatively high specific gravity, such as gravel and sand, contained in the mud are removed from the treatment tank 72. Sediment below, and light muddy water and plugging material float above. The muddy water in the processing tank 72 is filtered by the spiral spring 74 by the driving force of the pump 80, flows into the spiral spring 74, passes through the drainage pipe 78, and flows into the mud material tank 7 shown in FIG. To the excavator 1 with the plugging material added. When adjusting the spring interval of the spiral spring 74 during the normal operation, the hydraulic cylinder 82 is driven. If a large amount of plugging material adheres to the outer periphery of the spiral spring 74 during the filtration by the filter body 73, the amount of muddy water flowing into the drain pipe 78 is reduced, and When the flow rate of the flow sensor 81 is less than the predetermined flow rate, the first solenoid valve 79 is closed and the second solenoid valve 85 is opened via the controller 86. By the opening of the second solenoid valve 85, the compressed air from the compressor 84 is injected through the air pipe 83 from between the springs of the spiral spring 74 constituting the filter body 73. At this time, immediately after the second solenoid valve 85 is opened by the controller 86, the cylinder rod 82a of the hydraulic cylinder 82 is driven to extend the spiral spring 74, thereby slightly opening the gap between the springs. With this operation, the muddy water in the treatment tank 72 does not flow into the filter body 72, and the plugging material attached to the outer peripheral surface of the spiral spring 74 is separated by compressed air, and the gap between the springs is removed. Sand and the like that have been sandwiched can be removed. Note that the hydraulic cylinder 82 is returned to the original state again after a predetermined time has elapsed by the controller 86, and the second solenoid valve 85 which has been opened so far is closed and the first solenoid valve 85 is closed. 79 is released.
[0036]
Therefore, even when the spring-type sorting device 70 according to the above-described configuration is used, the filtering material and the like are clogged by the plugging material contained in the collected mud, which prevents efficient collection of muddy water. There is no.
[0037]
In the above-described embodiment, the hydraulic cylinder is adopted as the telescopic drive device constituting the present invention. However, the present invention is not limited to such a hydraulic cylinder, and not only an air cylinder may be used, but also, for example, A motor in which a gear is fixed to a rotating shaft and an elevating member formed with a rack gear meshing with the gear may be used, and one end of the filter body 72 may be fixed to a tip of the elevating member.
[0038]
【The invention's effect】
As is clear from the above description of the embodiment of the present invention, in the present invention (the invention of claim 1), when the flow rate of the muddy water by the flow rate detecting device is smaller than the predetermined flow rate, that is, the filter body If the plugging material adheres to the periphery of the filter and filtering cannot be performed sufficiently, the solenoid valve is closed, and the fluid is pumped from the other end of the filter body by driving the pumping device. This fluid may be air or water, but in any case, the fluid is discharged from the inside of the filter body composed of the spiral spring by the pressure feeding of such fluid. At this time, since the expansion and contraction drive device is driven to make the entire length of the filter body slightly longer immediately after the fluid is pumped, when a plugging material or the like is attached between the spiral springs which are the filter body. However, the plugging material and the like can be effectively removed. Therefore, according to the present invention, the mud collected from the excavator can be effectively reused.
[0039]
Further, in the second invention (the invention according to claim 2), when the plugging material adheres to the outside of the filter and the filter cannot be sufficiently filtered, the solenoid valve closes and the filter body is driven by driving the pressure feeding device. The fluid is pressure-fed from the other end of the filter body, and the fluid is released from the inside of the filter body composed of a spiral spring. By driving, even if a plugging material or the like is attached between the spiral springs as the filter body, the plugging material or the like can be effectively removed. Therefore, according to the second aspect, it is possible to prevent adverse effects due to the plugging material.
[Brief description of the drawings]
FIG. 1 is a side view schematically showing an entire muddy water reuse system in a muddy shield method according to an embodiment of the present invention.
FIG. 2 is a side view schematically showing an example of a sorting device.
FIG. 3 is an exploded perspective view of a filter body constituting the sorting device shown in FIG . 2;
FIG. 4 is a side view schematically showing another example of the sorting device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Excavator 4 Sorting device 5 Cutter head 7 Mud tank 8 Moving channel 50 Spring type sorting device 52 Sorting device main body 53 Spiral spring 54 One rotating operation member 55 The other rotating operation member 60 Discharge pipe 70 Spring Type sorting device 73 Filter body 74 Spiral spring 79 First solenoid valve 80 Pump 81 Flow rate sensor 82 Hydraulic cylinder 86 Controller

Claims (2)

A filter provided with a filter body consisting of a spiral spring formed in a substantially cylindrical shape and disposed in a treatment tank into which mud containing water is charged, and discharging muddy water flowing into the filter body. A conduit, a flow rate detecting device for detecting a flow rate of the muddy water flowing into the conduit, an electromagnetic valve disposed in a middle portion of the conduit, and a fluid flowing into the filter body from the other end of the filter body. A pumping device for pumping, and a telescopic drive device for expanding and contracting the entire length of the filter body,
When the flow rate of the muddy water by the flow rate detecting device is smaller than a predetermined flow rate, the solenoid valve is closed, and the fluid is pumped from the other end of the filter body by driving the pumping device, and immediately after the fluid is pumped. A fixed sorter, characterized in that a telescopic drive device is driven so that the overall length of the filter body is slightly longer. While excavating underground while injecting the mud containing water and plugging material into the face from the tip of the excavator, taking the excavated mud containing the mud into the excavator and then carrying it out to the ground In the propelled mud shield method,
A plurality of sorting devices that sequentially sort mud containing condensed material carried out from the excavator to the ground and containing the mud material according to the particle size of the content of the mud,
Each of the plurality of sorting devices includes a filter body including a filter body formed of a spiral spring which is disposed in a treatment tank into which mud containing water is charged and which is formed into a substantially cylindrical shape. A conduit for discharging the mud flowing into the conduit, a flow detecting device for detecting a flow of the mud flowing into the conduit, an electromagnetic valve disposed in the middle of the conduit, and the other end of the filter body A sorting device including a fixed-type sorting device including a pumping device that pumps fluid into the filtering body and a telescopic driving device that expands and contracts the entire length of the filtering body, and a sorting device including the fixed sorting device. The mud reuse system in the mud shield method, wherein the mud filtered by the device is sent to the tip of the excavator after the plugging material is added.