JP2007009576A - Excavated earth and sand exhausting device and shield device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an excavated earth and sand exhausting device extremely excellent in practicality capable of sufficiently securing a working space in a tunnel and naturally finely exhausting the excavated earth and sand to the outside of the tunnel, and a shield device. <P>SOLUTION: In the excavated earth and sand exhausting device exhausting the excavated earth and sand produced in the case an adit 9 is excavated by an adit excavator 1 to the outside of the tunnel together with a fluid, the device is so constituted that a circulation passage 2 making the pressure derivation of the fluid from a fluid collecting section 6 provided outside the tunnel by a circulation device 3 and again making the pressure introduction of the fluid into the fluid collecting section 6 and a sludge removal passage 4 connected to the circulation passage 2 are provided inside the tunnel and that a sludge removal device 5 conveying the excavated earth and sand excavated by the adit excavator 1 to the circulation passage 2 is provided at the sludge removal passage 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to excavated earth and sand discharging devices and shield devices.

  The following methods are known as excavation earth and sand discharging methods for discharging excavation earth and sand generated when excavating a horizontal pit for installing a pipe body formed by connecting a plurality of pipe materials to the outside of the mine. .

A: Muddy water method (see Fig. 1)
A water pipe 23 and a sludge pipe 24 are attached to a partition wall 22 that isolates the face 21 of a horizontal excavator X such as a shield machine, and the water pipe 23 and the sludge pipe 24 are connected via a water pump 25. A circulation path is constructed, water (actually mud water) is supplied from the water pipe 23 to the face 21 side, and the fluid containing the excavated sediment excavated by the face 21 is discharged from the mud pipe 24, and the circulation path is formed on the ground. To collect excavated earth and sand at the collection unit 27 connected to the ground. In the figure, reference numeral 28 is a valve, 29 is a vertical shaft, and 30 is a horizontal shaft.

  In the muddy water method, if the water supply pressure from the water supply pipe 23 to the face 21 is too high, it is difficult to take in the excavated earth and sand, or high-pressure water may be ejected from the excavation site to the ground together with the groundwater. For this reason, the pressure of the face 21 needs to be maintained at an appropriate pressure. However, at this pressure, it is low to send the earth and sand to the outside of the mine by the mud pipe 24, and naturally the excavated earth and sand cannot be recovered satisfactorily.

  Therefore, in the muddy water method, it is necessary to attach the mud pump 26 to the mud pipe 24. In particular, when excavating a long distance (1 km or more) horizontal shaft, a plurality of relay mud pumps 26 are attached to the mud pipe 23.

B: Earth pressure method (see Fig. 2)
The partition wall 32 that isolates the face 31 of the horizontal excavator Y such as a shield machine is provided with a screw conveyor 34 that discharges the excavated earth and sand excavated by the face 31 to the mud tank 33, and the water pump 37 A circulation path is formed by connecting a water supply pipe 35 for supplying fluid with a sludge pipe 36 for discharging a fluid containing excavated sediment from the mud tank 33, and the ground collecting unit 38 collects the excavated sediment by the circulation path. How to recover with. In the figure, reference numeral 40 is a vertical shaft, and 41 is a horizontal shaft.

  In the earth pressure method, since the circulation path is opened in the mud tank 33, the mud pump 39 is always required on the mud side. Especially when excavating a long-distance (1 km or more) horizontal shaft as in the method A, the need for a relay mud pump 39 increases.

  Therefore, even if any of the above methods A and B is used, a plurality of pumps are required for the sludge pipes 24 and 36, particularly when excavating a long distance horizontal shaft. However, this pump occupies the cross section of the mine, presses the work space, and may hinder the movement of segments, people, etc. that form the pipe material, which is not preferable. This problem becomes prominent when the horizontal shaft has a small diameter (1.5 m or less).

  The present invention solves the above-mentioned problems, and excavation sediment can be discharged well outside the mine, as well as excavation sediment discharge apparatus and shield excellent in practicality that can secure a sufficient working space in the mine. A device is provided.

  The gist of the present invention will be described with reference to the accompanying drawings.

  An excavation earth and sand discharging device that discharges excavated earth and sand generated when excavating a horizontal shaft 9 with a horizontal excavator 1 to the outside of the well together with a fluid. 3 is provided with a circulation path 2 for deriving the fluid pressure and introducing the fluid into the fluid reservoir 6 again, and a drainage path 4 connected to the circulation path 2. The excavated sediment discharge device is characterized in that a mud discharge device 5 for pumping the excavated soil excavated by the horizontal excavator 1 to the circulation path 2 is provided.

  Moreover, the excavation earth and sand discharging apparatus according to claim 1, wherein the circulation path 2 has a sealed configuration.

  Further, in the excavation sediment discharging apparatus according to any one of claims 1 and 2, the circulation device 3 relates to the excavation sediment discharging apparatus, which is a circulation pump.

  Moreover, the excavation earth and sand discharging apparatus of any one of Claims 1-3 WHEREIN: The said circulation apparatus 3 concerns on the excavation earth and sand discharging apparatus characterized by being provided in the exterior of a mine.

  Moreover, the excavation earth and sand discharging apparatus of any one of Claims 1-4 WHEREIN: The said mud discharging apparatus 5 concerns on the excavation earth and sand discharging apparatus characterized by being a mud pump.

  Moreover, the excavation sediment discharge apparatus of any one of Claims 1-5 WHEREIN: The said mud path 4 is provided with the interruption | blocking apparatus which can interrupt | block the flow of fluid, The excavation sediment discharge It concerns the device.

  Moreover, the excavation earth and sand discharging apparatus of any one of Claims 1-6 WHEREIN: The said horizontal shaft excavator 1 excavates the horizontal shaft 9 whose length is 1 km or more and whose diameter is 1.5 m or less. The present invention relates to a digging earth and sand discharging device characterized by being.

  Moreover, the excavation earth and sand discharging apparatus of any one of Claims 1-7 WHEREIN: The said mud passage 4 is connected with the partition 8 which isolates the face 7 of the said horizontal excavation machine 1, It is characterized by the above-mentioned. The present invention relates to a drilling earth and sand discharging device.

  Further, the shield device includes a partition wall 8 that isolates the face 7 and includes a side shaft excavator 1 that excavates the face 7 to form a side shaft 9, and the pipe body 10 is disposed in the side shaft 9. The excavated earth and sand discharge device according to claim 8 is provided, and the pressure acting on the face 7 can be adjusted by controlling the amount of excavated earth and sand to the circulation path 2 by the mud drain device 5. The present invention relates to a shield device characterized by the above.

  Since the present invention is configured as described above, the pressure of the fluid circulating in the circulation path can be set to a sufficiently large level, and a pump is not required on the mud side of the circulation path as in the prior art, so that a sufficient working space in the mine is secured. In addition, the excavated earth and sand discharging device is excellent in practicality and can easily control the pressure and flow rate of the fluid circulating in the circulation path.

  DESCRIPTION OF EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the drawings showing the operation of the present invention.

  When excavating the horizontal shaft 9 with the horizontal shaft excavator 1, the excavated earth and sand excavated by the horizontal shaft excavator 1 is pumped from the mud channel 4 to the circulation channel 2 by the mud drain device 5.

  Accordingly, since the excavated sediment can be reliably fed into the circulation path 2 by the mud discharge device 5, the circulation pressure of the fluid circulating in the circulation path 2 can be set to a high enough pressure to circulate through the circulation path 2. It is possible to dig a horizontal shaft 9 with a small diameter and a long distance, without the need to install a pump on the drainage pipe (circulation drainage side) as before, without squeezing the working space in the mine. However, the work can be performed well.

  In addition, since the horizontal excavator 1 and the circulation path 2 are not directly connected as in the prior art, the pressure of the fluid circulating through the circulation path 2 is not easily influenced by the excavation status of the horizontal excavator 1, Accordingly, pressure control and flow rate control of the fluid in the circulation path 2 are facilitated.

  A specific embodiment of the present invention will be described with reference to FIGS.

  This embodiment has a partition wall 8 that isolates the face 7, and includes a side shaft excavator 1 that excavates the face 7 to form a side shaft 9, and a shield that disposes a tubular body 10 in the side shaft 9. As an excavating earth and sand discharging device for discharging excavated earth and sand generated when excavating the horizontal shaft 9 by the horizontal excavator 1 to the outside of the shaft with the fluid, there is a fluid reservoir portion provided outside the shaft. 6 is provided with a circulation path 2 for deriving a fluid pressure from the circulation device 3 and introducing the fluid into the fluid reservoir 6 again, and a drainage path 4 connected to the circulation path 2. The road 4 is provided with a digging earth and sand discharging device provided with a mud discharging device 5 for pumping the excavated earth and sand excavated by the horizontal excavator 1 to the circulation path 2, and no relay mud pump is required in the mine. It is comprised so that it may become.

  Specifically, in this embodiment, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-68319, a pipe material is disposed at the rear part of the horizontal excavator 1, a first propulsion jack is provided at the rear part of the pipe material, The horizontal shaft excavator 1 and the pipe material are propelled by extension of one propulsion jack, and then the first propulsion jack is contracted, and the pipe material is disposed in the space formed by the contraction of the first propulsion jack (this pipe material is Either the one that does not require assembly or the one that requires assembly of the segments when it is installed can be employed.) Subsequently, the newly installed pipe material is already expanded by the extension of the first propulsion jack. The arranged pipe material and the horizontal shaft excavator 1 are propelled, and this is repeated to connect a predetermined number of pipe materials to the horizontal shaft excavator 1 and then to the rear part of the pipe material connected to the horizontal shaft excavator 1. Two propulsion jacks are installed and this For example, a tube is formed by assembling segments in the space formed by shrinking the two propulsion jacks, and then the formed second pipe is pushed by the contracted second propulsion jack so that the side shaft is excavated by reaction force. The pipe 10 connected with the machine 1 and the horizontal excavator 1 is propelled, and the pipe 10 formed by connecting a plurality of pipes while forming the horizontal well 9 is arranged by repeating this.

  Therefore, since the inside of the pipe material from the entrance of the horizontal shaft 9 to the space portion formed by contracting the second propulsion jack requires a certain amount of work space to transport the segments, When excavating the horizontal shaft 9 having a diameter of 1 km or more and a diameter of 1.5 m or less, the problems described in the background section are likely to occur.

  Each part will be specifically described.

  The partition wall 8 of the horizontal excavator 1 is provided with a communication hole that communicates with the drainage passage 4, and the partition wall 8 is connected to the drainage passage 4 as shown in FIG. 3. In other words, this embodiment employs a sealed horizontal shaft excavator 1 as the horizontal shaft excavator 1. Further, the mud drainage path 4 is provided with a mud pump as a mud draining device 5 for pressure-feeding excavated sediment generated at the face 7 to the circulation path 2.

  Therefore, in this embodiment, the circulation path 2 and the face 7 are separated (since the face 7 is not incorporated in the circulation path), the fluid flowing through the circulation path 2 does not affect the face 7, Since the fluid is not affected by the face 7, the pressure and flow rate of the fluid circulated by the circulation device 3 provided in the circulation path 2 can be easily set.

  Furthermore, when the mud passage 4 is connected to the partition wall 8 in the closed type horizontal shaft excavator 1 as in this embodiment, the face pressure of the horizontal shaft excavator 1 adjusts the discharge amount of the mud pump. Thus, control is possible, and control is also easy from this point. The face pressure of the horizontal excavator 1 may be controlled by a control valve. Reference numeral 13 in the figure is a shaft having a predetermined depth drilled in a natural ground.

  As the mud pump, the flow rate may be smaller than that of the circulation pump described later, but it is necessary to pump the excavated earth and sand in a state close to a solid state and to push in the earth and sand at a pressure larger than the pressure of the connecting portion with the circulation path 2. Therefore, it is preferable to employ a plunger pump or a squeeze pump that can obtain a high pressure.

  Specifically, a concrete pump is employed in this embodiment. In this embodiment, the excavated sediment from the mud passage 4 is pumped to the circulation path 2 by using this concrete pump, so that the circulation path 2 disposed at a predetermined depth from the ground is placed outside the mine (above ground). Even if the fluid is circulated at a pressure that can be circulated to the level, the excavated earth and sand can be pumped to the circulation path 2 at a pressure higher than the circulating pressure.

  Moreover, the mud pump is installed in the pipe material on the face 7 side from a new pipe material arrangement position (a space formed by contracting the second propulsion jack). Therefore, the presence of the mud pump does not hinder the transportation of the segments and the like.

  The circulation path 2 connected to the sludge passage 4 is connected to a water supply section 2a upstream from the connection section with the sludge passage 4 and a drainage section 2b downstream from the connection section via a circulation device 3. It is the composition which consists of.

  Specifically, the circulation path 2 is formed by connecting a plurality of tubular bodies made of steel, resin, or the like, and has a sealed configuration in which the circulation pressure is not released except for the portion 6 for fluid described later. Therefore, the control of the circulation pressure is facilitated accordingly.

  As the circulation device 3, a circulation pump having the ability to generate pressure enough to discharge excavated earth and sand to the outside of the mine is adopted. For this reason, the pump which assists the said circulating pressure conventionally required can be made unnecessary in the horizontal shaft 9.

  In general, there is a limit to the suction pumping method (suction pump) when circulating the fluid containing the excavated earth and sand, so it is preferable to adopt a more efficient discharge pumping method (discharge pump). This circulation pump is installed on the ground. In addition, this circulation pump may be installed in any position, such as not only in the above-mentioned ground but also in a vertical shaft if it is not in a horizontal shaft.

  Specifically, in this embodiment, a slurry pump suitable for slurry transportation is employed. In this embodiment, the term “slurry transportation” refers to transportation of earth and sand by circulating a liquid at a flow rate at which earth particles do not settle in the fluid. Therefore, this slurry pump is required to be able to produce a necessary flow rate with respect to the diameter of the pipe constituting the circulation path 2 in order to obtain a sufficient flow rate.

  In addition, the fluid reservoir 6 is provided with an excavation sediment removal mechanism for introducing fluid into the circulation pump in a state where the excavation sediment has been removed at a position near the circulation pump on the ground as the drainage portion 2b of the circulation path 2. Is provided. This excavation earth and sand removal mechanism may be a structure that can separate excavation earth and sand and fluid (water) such as a filter mechanism. Specifically, it is not always necessary to completely separate the excavated sediment and water, and it is sufficient if the solid content of the excavated sediment is removed from the fluid flowing through the water supply section 2a. In addition, if it is not in a horizontal shaft, the part 6 for fluids may be installed in any position not only on the ground but in a shaft.

  Therefore, the fluid containing the excavated earth and sand flows through the drainage mud 2b of the circulation path 2, and the fluid (the mud) from which the excavated earth and sand (the solid content thereof) has been removed flows through the water supply section 2a.

  Further, the mud passage 4 is provided with a shut-off device (specifically, a valve) that can shut off the flow of fluid. Therefore, when the mud pump is not in operation, it is possible to prevent the excavation soil on the side of the mud pump by the fluid in the circulation path 2 and the inflow of the fluid to the mud pump side. Specifically, this blocking device is preferably provided between the circulation path 2 and the sludge apparatus 5 as the sludge path 4 in order to prevent the fluid from flowing into the sludge pump.

  As in the case of the circulation path 2, the mud discharge path 4 has a sealed structure formed by connecting a plurality of tubular bodies made of steel or resin.

  As the valve, any of manual, electric, electromagnetic, hydraulic, air, etc. valves may be used. Alternatively, a flapper or the like that opens when the mud pressure is high and closes when the pressure on the circulation path side is high may be adopted.

  Moreover, although the present Example employ | adopts the above structures, it can respond also to what is called an open type which does not provide the partition 8. FIG. That is, as shown in FIG. 4, the partition 8 and the mud passage 4 are not connected, and the screw conveyor 11 that conveys the excavated sediment generated at the face 7 and the mud storage that stores the excavated sediment from the screw conveyor 11 are stored. You may employ | adopt the closed-type horizontal shaft excavator 1 for what is called earth pressure method connected continuously through the tank 12. FIG.

  Since the present embodiment is configured as described above, when excavating the horizontal shaft 9 by the horizontal shaft excavator 1, the excavated earth and sand excavated by the horizontal shaft excavator 1 is removed from the mud channel 4 by the mud draining device 5. The pressure is fed to the circulation path 2. Accordingly, the excavated earth and sand can be reliably fed into the circulation path 2 by the mud discharge device 5.

  At this time, since the sealed circulation path 2 is divided from the face 7 and the pressure or the like can be set independently without affecting the face 7, the circulation pressure of the fluid circulating in the circulation path 2 is circulated through the circulation path 2. It is possible to set the pressure high enough to be possible, there is no need to install a pump on the sludge pipe (circulation drainage side) as in the past, the working space in the mine is not compressed, even if the diameter is small and Even when a long distance horizontal shaft 9 is excavated, the work can be performed satisfactorily.

  In addition, since the horizontal excavator 1 and the circulation path 2 are not directly connected as in the prior art, the pressure of the fluid circulating through the circulation path 2 is not easily influenced by the excavation status of the horizontal excavator 1, Accordingly, pressure control and flow rate control of the fluid in the circulation path 2 are facilitated.

  Therefore, in this embodiment, since the excavated sediment can be pumped to the circulation path by the pumping device, the pressure of the fluid circulating in the circulation path can be set to a sufficiently large value, and the pump is disposed on the waste mud side of the circulation path as in the past. It is unnecessary, can secure a sufficient working space in the mine, and can easily control the output and flow rate of the circulation device that circulates the fluid in the circulation path.

It is general | schematic explanatory sectional drawing of the conventional muddy water method. It is general | schematic explanatory sectional drawing of the conventional earth pressure method. It is a schematic explanatory sectional drawing of a present Example. It is general | schematic explanatory sectional drawing of another example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Horizontal shaft excavator 2 Circulation channel 3 Circulation device 4 Drainage channel 5 Drainage device 6 Fluid reservoir 7 Face 8 Bulkhead 9 Horizontal shaft
10 tube

Claims (9)

  An excavation sediment discharge device that discharges excavated sediment generated when excavating a horizontal shaft with a horizontal excavator to the outside of the shaft along with the fluid. A circulation path for deriving pressure and introducing the fluid again into the fluid reservoir is provided, and a drainage mud path connected to the circulation path is excavated by the horizontal excavator in the drainage path. An excavating earth and sand discharging device characterized in that a mud discharging device for pumping the excavating earth and sand to the circulation path is provided.   2. The excavated earth and sand discharging apparatus according to claim 1, wherein the circulation path has a sealed configuration.   The excavated earth and sand discharging device according to claim 1, wherein the circulation device is a circulation pump.   The excavation sediment discharge apparatus according to any one of claims 1 to 3, wherein the circulation device is provided outside the mine.   The excavation sediment discharging apparatus according to any one of claims 1 to 4, wherein the mud discharging apparatus is a mud pump.   The excavated sediment discharge device according to any one of claims 1 to 5, wherein the mud passage is provided with a blocking device capable of blocking a fluid flow.   The excavation earth and sand discharging apparatus according to any one of claims 1 to 6, wherein the horizontal shaft excavator excavates a horizontal shaft having a length of 1 km or more and a diameter of 1.5 m or less. Drilling earth and sand discharging device.   8. The excavated sediment discharge device according to claim 1, wherein the mud passage is connected to a partition wall that isolates a face of the horizontal excavator. 9.   The shield apparatus according to claim 8, further comprising a horizontal shaft excavator having a partition wall for isolating the face and excavating the face to form a horizontal shaft, and arranging a pipe body in the horizontal shaft. A shield device comprising a discharge device, wherein the pressure acting on the face can be adjusted by controlling the pumping amount of excavated sediment to the circulation path by the mud discharge device.

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