JP4131493B2 - Shaft excavator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shaft excavation device, and more particularly to a shaft excavation device with improved technology for conveying excavation gaps to the ground.
[0002]
[Prior art]
Conventionally, as a deep shaft with a depth of several hundreds of meters, a coal mine has been used in the past, and recently, a tunnel for ventilation of a traffic tunnel through which a railroad or a road passes, and in the future, disposal of radioactive waste, etc. Therefore, it is considered that a deep shaft with a depth of 1000m is necessary. These shaft excavation methods are roughly classified into blast excavation and mechanical excavation. Recently, various shaft excavation apparatuses for mechanical excavation have been put into practical use. The main structure of the shaft excavator includes a barrel member, a cutter head equipped on the tip side of the barrel member, an excavator including a plurality of jacks for propelling the barrel member and the cutter head, and excavation Excavation drain discharge device that transports ground (such as earth and sand and gravel) to the ground.
[0003]
In the shaft excavation device described in Patent Document 1, the excavator is provided with a screw conveyor that transports the excavation sludge in the chamber upward as muddy water, and a muddy water tank that stores muddy water that has been conveyed by the screw conveyor. A mud pipe and a mud pump for sucking up mud water from the mud tank and sending it to the muddy water treatment plant on the ground, and a mud pipe and a mud pump for sending water treated in the mud treatment plant to the mud tank are provided.
[0004]
In the shaft excavation apparatus described in Patent Document 2, a bucket conveyor for transporting excavation slip upward is provided in the excavator. The bucket conveyor includes a center post, an endless chain provided in the center post, A plurality of buckets coupled to the chain and a hydraulic motor for rotating the plurality of buckets (chains) are provided, and a natural ground can be excavated with a cutting blade attached to the tip of each bucket. The center post can be rotated around a vertical axis by a hydraulic motor, and a helical drum excavator is connected to the tip of the center post.
[0005]
On the other hand, the excavator is separated by an air-jet jet pump that sucks and conveys excavation sludge in the chamber together with water, a separation device that separates the excavation sludge and water that has been conveyed by the air-mix jet pump, and a separation device. There is known a shaft excavator provided with a drill dock for storing excavation sludge and provided with a excavation sludge discharge device for transporting the excavation sludge to the ground by a capsule transport system. The water separated by the separation device is reused as water for transporting the excavation sludge by the mixed air jet pump.
[0006]
In Patent Document 3, boring is performed in the ground in front of the excavator, and the reaction force is received by the reaction force receiving rod while the lower end portion of the reaction force receiving rod inserted into the bored hole is solidified. A technique for propelling an excavator is disclosed.
[0007]
[Patent Document 1]
JP 2002-332792 A
[Patent Document 2]
Japanese Patent Laid-Open No. 2003-3780
[Patent Document 3]
JP 2002-349181 A
[0008]
[Problems to be solved by the invention]
In the conventional shaft excavating device, when the excavation sludge discharging device as in Patent Document 1 is adopted, as the shaft depth increases, a large number of mud pumps that suck up mud water and send it to the ground are required. Most of them must be installed in the middle of the shaft, so that the equipment cost of the excavation sludge discharge device becomes very expensive, and the operation load of this excavation sludge discharge device also increases. The work load to install these sludge pumps is large, the depth of the shaft becomes deep, and if excavation sludge is transported while being relayed at multiple relay points, it will not be possible to discharge excavation sludge efficiently. The shaft construction period will be longer.
[0009]
In addition, when the excavation sludge discharge device as in Patent Document 1 is adopted, the excavation sludge in the middle of conveyance in the sludge pipe falls together with water if the sludge pump fails or the operation stops in an emergency such as a power failure. However, there is a risk that the mud pipe may be blocked or damaged, or the pump may be damaged. Even in the capsule transporting type excavation sludge discharging apparatus, the equipment cost becomes high, and it is difficult to efficiently discharge the excavation sludge.
[0010]
In the excavator, as a excavation gap transport mechanism for transporting excavation gap from the vicinity of the cutter head upward, in Patent Document 1, a screw conveyor is provided, and in Patent Document 2, a bucket conveyor is provided. Since it has a complicated structure with a large number of points and requires a hydraulic motor for driving, the equipment cost of the excavation gap transport mechanism becomes expensive, and the driving load of the excavation gap transport mechanism also increases.
[0011]
Patent Documents 1 to 3 do not disclose any measures for spring water from the natural ground in front of the excavator. In other words, depending on the state of spring water in the natural ground, there is a case where the water pressure by the spring water acts on the cutter head and the case where the water pressure acts on the cutter head. Even when the water pressure acts on the cutter head, the water pressure is constant. In many cases, it is difficult to press the cutter head against the front ground with an appropriate pressing force. As a result, there is a risk that the ground cannot be excavated efficiently.
[0012]
In conventional shaft excavation equipment, it is difficult to transport the excavation gap near the cutter head without leaving the excavation gap, and if there is any excavation gap left, the excavation gap may cause the cutter head to rotate poorly. And the cutter head is easily worn. Some excavators can weigh several hundred tons, and it is not desirable in terms of equipment costs and safety to suspend them from the ground to support the load of the excavator. It is also difficult to press the cutter head against the front ground with an appropriate pressing force.
[0013]
The object of the present invention is to simplify the structure of the excavation sludge discharge device, reduce the equipment cost, reduce the operating load of the excavation sludge discharge device, efficiently discharge the excavation sludge, and further increase the number of excavation sludge discharge pipes. Shorten the shaft construction period by making it easy, simplify the structure of the excavation transport mechanism that transports the excavation sludge upward in the excavator, reduce the equipment cost, and reduce the driving load of the excavation transport mechanism In addition, the cutter head is pressed against the front ground with an appropriate pressing force, and the ground is efficiently excavated with the cutter head, and the cutter head is prevented from being left behind and the rotation of the cutter head is prevented as much as possible. , And so on.
[0014]
[Means for Solving the Problems]
The shaft excavation apparatus according to claim 1 has a shaft having an excavator provided with a trunk member, a cutter head provided on the tip side of the trunk member, and a plurality of propulsion jacks for propelling the trunk member and the cutter head. In a shaft excavation device for excavation, a water supply pipe portion extending from the vicinity of the upper end of the shaft to the excavator, and a discharge pipe connected to the lower end of the water supply pipe portion and extending to the vicinity of the upper end of the vertical shaft together with water to the ground Excavation debris discharge device comprising an excavation debris transfer pipe that is added as the shaft depth increases and a drainage pump that supplies dewatering water to the water supply pipe section And using a water pressure generated at the face of the cutter head to transport the excavation gap excavated by the cutter head together with water to the excavation slot input device. A possible excavation shear transport mechanism, one end projecting to the front side of the cutter head and the other end connected to the separation device, and a discharge tube capable of leading the water separated by the separation device to the face side, An excavation sludge transport mechanism having a face water pressure adjusting pump that is interposed in the lead-out pipe and can adjust the water pressure of the face, and a separation device that separates the excavation sludge transported by the excavation sludge transport mechanism and water. Provided, and configured to supply the excavation debris separated by the separation device to the excavation debris input device, the excavation debris discharge device is configured to convey the excavation debris to the ground by the water flow in the excavation debris transport pipe It is characterized by this.
[0015]
In this shaft excavation device, the excavation drain discharge device includes a water supply pipe portion extending from the vicinity of the upper end of the shaft to the excavator, and a discharge pipe portion connected to the lower end of the water supply pipe portion and extending to the vicinity of the upper end of the shaft. It has an excavation debris transfer pipe, and water for debris transfer is supplied to the water supply pipe section by the soil discharge pump of this excavation debris discharge device. By doing so, the excavation gap is transported to the ground and discharged by the water flow in the excavation gap transport pipe.
[0016]
The excavation debris transfer pipe is a siphon-like pipe in which the water supply pipe section and the discharge pipe section are connected to each other. By adopting the so-called siphon technology using this excavation debris transfer pipe and the earth discharge pump, Even if there is no very high output pump or a large number of pumps as a pump for use, the vertical shaft depth, that is, the vertical length of the excavation pipe is almost unaffected, and the vertical shaft depth increases, It becomes possible to transport the excavation gap by generating a water flow in the excavation gap conveyance pipe. In this way, the structure of the excavation sludge discharge device can be simplified and the equipment cost can be reduced, and the operation load of the excavation sludge discharge device can be reduced.
[0017]
The excavation debris discharge device can respond by adding the excavation debris transfer pipe as the shaft depth becomes deeper, and this addition operation can be easily performed. Can be transported at once without being relayed from the excavator to the ground, so that excavation can be discharged efficiently, and as a result, the construction period of the shaft can be greatly shortened. Even if the earth removal pump breaks down or stops operating in case of an emergency such as a power outage, at least water in the excavation debris transfer pipe is retained without falling. Can be prevented as much as possible, and it is excellent in safety.
[0018]
Also, stand As the pit depth increases and the vertical distance from the ground of the excavation sludge transport pipe increases, the water pressure in the excavation sludge transport pipe at the portion where the excavation sludge is pushed becomes higher. In addition, it is possible to prevent the outflow of water from the excavation debris transfer pipe and to reliably push the excavation debris into the discharge pipe portion.
[0019]
In addition, this shaft excavator It is equipped with an excavation sludge transport mechanism that can transport excavation sludge excavated by the cutter head together with water to the excavation sludge input device using the hydraulic pressure generated at the face of the cutter head. The driving load of the mechanism can be reduced, and the excavation slot can be transported to the excavation slot input device easily and reliably.
[0020]
Moreover, this shaft excavator is The excavation debris separated by the separation device can be efficiently pushed into the discharge pipe by the excavation throw-in device, and the water separated by the separation device can be reused, and excess water can be transported by excavation debris. It can also be discharged into a tube.
[0021]
[0022]
By actively supplying the water separated by the separation device to the face of the cutter head by the face pressure adjustment pump, the water pressure of the face can be increased and adjusted to an appropriate pressure. It can be transported reliably and stably to the separation device via the transport pipe, and while supporting the load of the excavator taking into account its hydraulic pressure, the cutter head can be moved to the front ground with an appropriate pressing force. It becomes possible to efficiently perform excavation with the cutter head. Moreover, since the excavation gap transport mechanism has a simple structure including a transport pipe, a lead-out pipe, and a face water pressure adjustment pump, the equipment cost of the excavation gap transport mechanism can be reduced.
[0023]
Claim 2 The vertical shaft drilling device is claimed 1 In the invention, there is provided a preceding earth removing cutter provided at a tip portion of the transport pipe, an advance / retreat driving mechanism for driving the preceding earth removing cutter forward and backward, and a rotation driving mechanism for rotating the preceding earth discharging cutter. It is characterized by that. Adjust the protruding position of the preceding earth removal cutter with the advance / retreat drive mechanism, rotate the preceding earth removal cutter with the rotation drive mechanism to form a collection hole, collect excavation sludge in the collection hole, and in some cases advance earth removal While the cutter is advanced and retracted and rotated, the excavation slot can be sucked up by the transport pipe and collected and transported. It is possible to prevent the cutter head from rotating poorly or wearing out as much as possible by preventing the excavation gap from being left behind.
[0024]
Claim 3 The vertical shaft drilling device is claimed 1 According to the invention, an excess water discharge pipe for discharging the excess water separated by the separation device to a discharge pipe section, and an excess water discharge pump interposed in the excess water discharge pipe are provided. To do. When there is a lot of spring water from the front ground and the pressure of the face exceeds the appropriate pressure, the surplus water discharge pipe and the surplus water discharge pump positively discharge the water separated by the separation device into the excavation sludge transport pipe. In addition, the water pressure of the face can be reduced and adjusted to an appropriate pressure.
[0025]
Claim 4 The vertical shaft drilling device is claimed 1 In this invention, the cutter head is configured such that the gap excavated by the cutter head gathers in the portion of the cutter head where the tip of the transport pipe projects. Here, the cutter head has a downward umbrella shape in which the portion (leading portion) from which the tip of the transport pipe projects is most advanced, and a plurality of gathering plates attached to the front portion of the cutter head in a spiral shape. Composed. In this way, the excavation gap is reliably collected at the preceding portion of the cutter head, and the excavation gap can be sucked up by the transport pipe, recovered, and transported. The excavation gap is prevented from being left behind, and the rotation failure and wear of the cutter head can be prevented as much as possible.
[0026]
Claim 5 The vertical shaft drilling device is claimed 1 The invention is characterized in that a boring device is provided for drilling the ground in front of the cutter head to investigate the state of spring water in the ground and improving the ground when there is a large amount of spring water. It is. With the boring device, drill the ground in front of the cutter head to investigate the state of the spring in the ground, and adjust the spring by improving the ground by injecting mortar if there is a large amount of spring. can do.
[0027]
Claim 6 The vertical shaft excavation apparatus of claim 1 to claim 1. 5 In any of the inventions, an erector device for assembling a segment to the inner surface of a tunnel excavated by the excavator is provided, and the trunk member has a rear trunk and a front trunk that are relatively movable in the direction of excavation. The plurality of jacks for propulsion include a plurality of first jacks for propelling and driving the rear cylinder with respect to the segments assembled by the erector apparatus, and a plurality of second jacks for propelling and driving the front trunk with respect to the rear trunk. And is provided.
[0028]
By providing the erector device, the shaft can be excavated while lining the inner surface of the tunnel excavated by the excavator with the segment. The reaction force of the plurality of first jacks can be applied to the segments assembled on the inner surface of the tunnel to propel the front and rear cylinders, and a plurality of second jacks can be mounted on the rear cylinder fixed to the inner surface of the tunnel. A reaction force can be taken to propel the front torso, and the front ground can be excavated with the cutter head on the tip side by these two methods.
[0029]
Claim 7 The vertical shaft drilling device is claimed 6 A plurality of first gripper mechanisms for releasably fixing the rear cylinder to the inner surface of the tunnel; and fixing the front cylinder to the inner surface of the tunnel so as to be unreleasable and adjusting an advancing direction of the excavator A plurality of second gripper mechanisms are provided. When driving the plurality of second jacks to propel the front cylinder while the rear cylinders are fixed to the inner surface of the tunnel by the plurality of first gripper mechanisms, the front cylinder and the rear are driven by driving the plurality of first jacks. When propelling the trunk, the traveling direction of the excavator can be adjusted by the plurality of second gripper mechanisms.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. This embodiment is an example when the present invention is applied to a shaft excavation apparatus for shaft excavation having an excavator. In addition, the lower part which is the excavation direction of an excavator is demonstrated as a front and a front end side suitably.
As shown in FIGS. 1 to 5, the shaft excavator 1 conveys the excavator 2 excavating the shaft T (vertical tunnel T) and excavation excavated by the excavator 2 to the ground and discharges it. A drilling discharge device 3 is provided.
[0031]
As shown in FIGS. 1 to 4, the excavator 2 includes a trunk member 10, a cutter head 11 provided on the distal end side of the trunk member 10, and a plurality of propulsion jacks that propel the trunk member 10 and the cutter head 11. 12 and an erector device 13 for assembling the segment S on the inner surface of the tunnel T excavated by the excavator 2.
[0032]
The body member 10 includes a rear body 10A and a front body 10B that are body bodies that are relatively movable in the direction of excavation (upward and downward direction), and the upper portion of the front body 10B is located below the rear body 10A. It is slidably fitted outside. The rear cylinder 10A or the front cylinder 10B is equipped with an annular slide seal 20 that always seals between the fitting portions of the rear cylinder 10A and the front cylinder 10B, and an annular emergency water stop seal 21 that stops water in an emergency. Has been.
[0033]
As the plurality of propulsion jacks 12, a plurality of first jacks 12A for propelling and driving the rear trunk 10A with respect to the segment S assembled by the erector device 13, and a plurality of propulsion driving for the front trunk 10B with respect to the rear trunk 10A. The second jack 12B is provided. A rear trunk ring frame 22 is fixed to the inner surface of the central portion in the longitudinal direction of the rear trunk 10A, and a plurality of first jacks 12A are disposed at appropriate intervals in the circumferential direction along the inner surface of the rear trunk 10A. It is fixed to the rear trunk ring frame 22 in an insertion shape.
[0034]
Further, a front body ring frame 23 whose front plate serves as a partition is fixed to the inner surface of the front portion of the front body 10B, and the plurality of second jacks 12B are oriented in the vertical direction along the inner surface of the body member 10 in the circumferential direction. The upper end of the second jack 12B (the upper end of the rod) is connected to the rear trunk ring frame 22, and the lower end (the lower end of the jack body) is connected to the front trunk ring frame 23. ing. The rear trunk ring frame 22 is equipped with a hydraulic pressure supply unit 25 that supplies hydraulic pressure to the first and second jacks 12A and 12B. The hydraulic pressure supply unit 25 includes a hydraulic cylinder 26 of the first gripper mechanism 14A, a hydraulic cylinder 28 of the second gripper mechanism 14B, a hydraulic jack 66 of the excavation slippering device 50, and a hydraulic cylinder 80a of the advance / retreat drive mechanism 80, which will be described later. It is a common device that supplies hydraulic pressure to the like.
[0035]
Here, as shown in FIGS. 1 to 3, the excavator 2 includes a plurality of (for example, four) first gripper mechanisms 14 </ b> A that fix the rear trunk 10 </ b> A to the inner surface of the tunnel T in a releasable manner, A plurality of (for example, four) second gripper mechanisms 14 </ b> B that can fix the body 10 </ b> B to the inner surface of the tunnel T in a releasable manner and can adjust the traveling direction of the excavator 1 are provided.
[0036]
The plurality of first gripper mechanisms 14A are provided in the center portion in the longitudinal direction of the rear cylinder 10A, and a plurality of recesses 10a for mounting the first gripper mechanisms 14A are formed in the rear cylinder 10A. Each first gripper mechanism 14A has a pair of upper and lower hydraulic cylinders 26. The hydraulic cylinders 26 are mounted in the recesses 10a so as to face the center side of the tunnel T, and the tip of the piston rod 26b is connected to the recess bottom wall 10b. It is connected to. When a pressing plate 27 having a circular arc cross section is connected to a block in which a pair of cylinder main bodies 26a of each first gripper mechanism 14A is built, and a plurality of hydraulic cylinders 26 of a plurality of first gripper mechanisms 14A are driven forward, The plurality of presser plates 27 are pressed against the inner surface of the tunnel T, and the rear trunk 10 </ b> A is fixed to the inner surface of the tunnel T.
[0037]
The plurality of second gripper mechanisms 14B are provided at the front end portion of the front cylinder 10B, and a plurality of recesses 10c for mounting the second gripper mechanisms 14B are formed in the front cylinder 10B. Each second gripper mechanism 14B has a hydraulic cylinder 28. The hydraulic cylinder 28 is mounted in the recess 10c so as to face the center side of the tunnel T, and the plurality of hydraulic cylinders 28 of the plurality of second gripper mechanisms 14B advance. When driven, the block including the cylinder main body of the hydraulic cylinder 28 is pressed against the inner surface of the tunnel T, and the front cylinder 10B is fixed to the inner surface of the tunnel T.
[0038]
By providing the plurality of first jacks 12A, the plurality of second jacks 12B, the plurality of first gripper mechanisms 14A, and the plurality of second gripper mechanisms 14B, the plurality of first gripper mechanisms 14A allows the rear trunk 10A to be connected to the tunnel T. In a state of being fixed to the inner surface, the traveling direction of the excavator 1 is adjusted by the plurality of second gripper mechanisms 14B, and the plurality of second jacks 12B are driven to propel the front trunk 10B. The mountain can be excavated, and the plurality of first jacks 12A can be driven to propel the rear trunk 10A and the front trunk 10B.
[0039]
As shown in FIGS. 1, 2, and 4, the cutter head 11 is attached to the short cylindrical portion 30, the front plate portion 31 connected to the lower end portion of the cylindrical portion 30, and the front plate portion 31. And a plurality of roller cutters 32. A relatively large diameter central hole 31a and a plurality of small diameter holes 31b are formed in the front plate portion 31. From the central hole 31a, a transport pipe 75 of the excavation gap transport mechanism 51 and a sleeve fitted to the transport pipe 75 are fitted. A leading end of 78 projects downward, and a leading earth cutter 33 is mounted on the leading end of the transport pipe 75, and a plurality of bits 33a are attached to the leading earth cutter 33.
[0040]
The front plate portion 31 of the cutter head 11 is formed in a downward umbrella shape whose central portion protrudes most downward, and a plurality of gathering plates 34 and 35 are attached to the front plate portion 31 in a spiral shape. The excavation surface by the cutter head 11 is an inclined surface that is lowered toward the center portion, and the excavation gap is scraped by the plurality of approach plates 34 and 35 by rotating the cutter head 11 in the direction of arrow a in FIG. It falls on the slope and gathers in the center. In this way, the cutter head 11 is configured so that the gap excavated by the cutter head 11 gathers in the central portion of the cutter head 11 where the tip of the transport pipe 75 protrudes.
[0041]
Regarding the mechanism for rotationally driving the cutter head 11, a ring member 40 is connected to the rear end portion of the cutter head 11, a ring gear 41 is connected to the rear end portion of the ring member 40, and the ring gear 41 has a plurality of drive gears 42. Are engaged. The ring member 40 is rotatably fitted in a ring-shaped hole of the front trunk ring frame 23 via an annular seal member, and a ring gear 41 and a plurality of drive gears 42 are disposed in a space behind the hole. Yes. The plurality of drive gears 42 are driven by a plurality of drive motors 43 fixed to the front trunk ring frame 23, and the cutter head 11 is rotationally driven together with the ring gear 41 and the ring member 42.
[0042]
As shown in FIG. 1, the erector apparatus 13 is an erector main body 46 including a gripping portion 45 that grips a segment S so that the segment S can be released, and a mechanism that moves the gripping portion 45 in the radial direction of the tunnel T. The ring frame 22 includes an erector main body 46 that is rotatably supported around a vertical axis, and a mechanism that includes a drive motor 47 that rotates the erector main body 46. Among the plurality of segments S assembled by the erector device 13, the segments S at appropriate intervals in the vertical direction are firmly fixed to the inner surface of the tunnel T by the lock bolt SB. In addition, the segment conveyance apparatus which conveys the segment S from the ground to the erector apparatus 13 is provided. The upper end portion of the rear cylinder 10A is provided with a tail seal that always seals between the rear cylinder 10A and the assembled segment S and a water stop seal that stops water in an emergency. The Yes.
[0043]
As shown in FIGS. 1 to 5, this shaft excavation apparatus 1 includes an excavation slip discharge device 3, excavation slip input device 50, excavation slip transport mechanism 51, separation device 52, surplus water discharge mechanism 53, and boring device 54. The excavator 2 is equipped with devices and mechanisms 50 to 54 other than the excavation slip discharge device 3.
[0044]
First, the excavation slip discharge device 3 will be described.
As shown in FIGS. 1 and 5, the excavation drain discharge device 3 is connected to the water pipe 61 extending from the ground near the upper end of the shaft T to the excavator 2 and to the lower end of the water pipe 61 and is connected to the shaft T The excavation sludge transport pipe 60 provided with a discharge pipe portion 62 that extends to the ground near the upper end of the shaft and transports the excavation sludge together with water to the ground, and the water for slip transport that is installed on the ground near the upper end of the shaft T and is fed to the water feed pipe portion 61. The excavation sludge discharge device 3 is configured to transport the excavation sludge to the ground by the water flow in the excavation sludge transport pipe 60. The excavation gap and water transported to the ground are separated by the excavation gap separator, and the water can be reused and supplied to the water supply pipe section 61.
[0045]
The excavation debris transfer pipe 60 is composed of a water pipe 61 and a discharge pipe 62 which are independent pipes, and is a siphon-like pipe whose lower end is U-shaped. That is, even if the vertical length of the excavation sludge transport pipe 60 is hardly affected, even if the depth of the vertical shaft T becomes deep, the water for the sludge transport is supplied to the water supply pipe section 61 by the earth removal pump 63 installed on the ground. Then, a water flow is generated in the excavation debris transfer pipe 60, and the excavation debris is conveyed to the ground by this water flow.
[0046]
The excavation slot throwing device 50 is connected to the discharge pipe portion 62 in the vicinity of the lower end position thereof, and the excavation slot is pushed into the discharge pipe portion 62 by the excavation slot throwing device 50, and the connecting portion with the excavation slot throwing device 50 is connected. Further, the surplus water drain pipe 85 of the surplus water discharge mechanism 53 is connected to the downstream side. In addition, several places in the middle of the excavation debris transfer pipe 60 are connected to and supported by the segment S assembled by the erector apparatus 13.
[0047]
This excavation slip conveyance pipe 60 is added as the depth of the shaft T increases. In this case, a water supply extension pipe and a discharge extension pipe having a predetermined length are connected to the existing water supply pipe section 61 and the discharge pipe section 62 by bolts to be added.
[0048]
Next, the excavation slot input device 50, the excavation slot transport mechanism 51, the separation apparatus 52, and the surplus water discharge mechanism 53 will be described.
As described above, the excavation slip input device 50 is a device for pushing the excavation slip into the excavation slip transport pipe 60 and is installed on the gantry 8 on the upper side of the erector device 13. This shaft excavator 1 is intended for excavation of a deep shaft with a depth of several hundreds of meters or more, and further reaches a depth of 1000 m. Therefore, the water pressure at the lower end position in the excavation debris transfer pipe 60 is very high. The excavation slot throwing device 50 is used to push the excavation gap into the excavation gap conveying pipe 60 against the high water pressure.
[0049]
As shown in FIGS. 1 and 6 to 9, as an example of the excavation gap throwing device 50, the excavation gap throwing device 50 includes a pair of left and right plungers 65 and a pair of hydraulic jacks 66 that respectively drive the plungers 65. The distal ends of the pair of plungers 65 are fixed to a slide plate 67, and the slide plate 67 is slidably engaged with a slide guide 68. A base end portion of the pair of plungers 65 and a base end portion of the pair of hydraulic jacks 66 are integrally connected by connecting plates 69a and 69b.
[0050]
The slide plate 67 is formed with two slide plate holes that communicate with the slippage entrances of the pair of plungers 65, and the slide plate 68 is formed with three slide guide holes in the vertical plate portion. The distance between the guide holes is the same as the distance between the two slide plate holes. The slide guide 68 is connected to a slip guide tube 70 that communicates with the middle hole of the three slide guide holes, and a pair of slip guide tubes 71 that communicate with the holes on both sides.
[0051]
A slip outlet tube 70 is connected in communication with the discharge tube portion 62, and a pair of slip introduction tubes 71 are connected in communication with the lower end of the slip storage portion 51 a of the separation device 52. The slide guide 68 is slid and driven by a hydraulic jack (not shown), and when the arrow in FIGS. 8 and 9 is set to the left, the slip inlet / outlet of the left plunger 65 is connected to the slip outlet pipe 70 as shown in FIG. When communicated, the slippage inlet / outlet of the right plunger 65 communicates with the right slip introduction pipe 71, and in this state, the pair of hydraulic jacks 66 are driven to remove the excavation slip in the left plunger 65. The excavation slot can be introduced into the right plunger 65 by being pushed into the discharge pipe portion 62 through 70.
[0052]
Further, as shown in FIG. 9, when the slippage inlet / outlet of the right plunger 65 communicates with the slippage lead-out pipe 70, the slippage inlet / outlet of the left plunger 65 communicates with the left slippage introduction pipe 71. By driving the pair of hydraulic jacks 66, the excavation gap in the right plunger 65 can be pushed into the discharge pipe portion 62 via the deviation outlet pipe 70, and the excavation gap can be introduced into the left plunger 65. . By repeating such an operation, the excavation gap can be efficiently pushed into the discharge pipe portion 62.
[0053]
As shown in FIGS. 1, 2, and 5, the excavation gap transport mechanism 51 uses the water pressure of spring water from the natural ground in front of the cutter head 11 to remove the excavation gap excavated by the cutter head 11. The excavation slot and water transported by the excavation slot transport mechanism 51 are supplied to a separation device 52 installed on the gantry 8. The separated excavation slot is supplied to the excavation slot input device 50 as described above.
[0054]
The excavation debris transport mechanism 51 has a transport pipe 75 whose one end (lower end) projects to the front side of the cutter head 11 and the other end (upper end) is connected to the separation device 52, and water separated by the separation device 52. A lead-out pipe 76 that can be led out to the inside of the cutter head 11 on the face side, and a face-water pressure adjusting pump 77 that is interposed in the lead-out pipe 76 and that can adjust the water pressure on the face side. The face water pressure adjusting pump 77 is installed on the base 9 on the upper side of the base 8.
[0055]
The transport pipe 75 includes a fixed transport pipe 75a fixedly provided on the excavator 2, and a movable transport pipe 75b that is connected to the fixed transport pipe 75a so as to be extendable and rotatable, and the movable transport pipe 75b. A sleeve 78 is externally fitted to the sleeve 78, and the sleeve 78 is rotatably supported by a bearing member 79 fixed to the front trunk ring frame 23. The movable transport pipe 75b and the distal end portion of the sleeve 78 project forward from the central hole 31a of the cutter head 11, and the leading earth discharging cutter 33 is provided at the distal end of the movable transport pipe 75b. Excavation debris gathers in the preceding hole excavated by the prior earth removal cutter 33, and the excavation debris enters the transport pipe 75 together with water, and is transported to the separation device 52 through the transport pipe 75.
[0056]
The lead-out pipe 76 is divided into at least two forks 76a and protrudes toward the front face side of the front trunk ring frame 23. The water flow in the transport pipe 75 is generated due to the water pressure of the face. When the detected water pressure is lower than the appropriate pressure for effectively transporting the excavation gap, the face water pressure adjusting pump 77 is used to increase the pressure to the appropriate pressure. Is driven, and the water separated by the separation device 52 is actively led out to the face side. When the face water pressure is higher than the appropriate pressure, the face water pressure adjusting pump 77 is stopped, and the surplus water discharge mechanism 53, which will be described later, is operated to reduce the face water pressure to the appropriate pressure. To.
[0057]
Here, an advancing / retracting drive mechanism 80 including a hydraulic cylinder 80a that drives the movable transport pipe 75b forward and backward, and a drive mode that rotationally drives the movable transport pipe 75b. T A rotational drive mechanism 81 is provided. In the advance / retreat drive mechanism 80, the cylinder body of the hydraulic cylinder 80a is fixed to the front body ring frame 23 by a bracket, and the tip of the piston rod is rotatable with respect to the movable transport pipe 75b and cannot be moved relative to the vertical direction. It is connected to.
[0058]
As shown in FIGS. 1, 2, and 5, the surplus water discharge mechanism 53 removes surplus water from the discharge pipe portion. 62 A surplus water discharge pipe 85 for discharging surplus water separated by the separation device 52 to the discharge pipe portion 62, and a surplus water discharge pump 86 interposed in the surplus water discharge pipe 85. And have. When there is surplus water due to spring water from the front ground, the surplus water discharge pipe 85 is driven and separated by the separation device 52 in order to obtain an appropriate pressure when the water pressure of the face is higher than the appropriate pressure. Excess water is positively discharged to the discharge pipe portion 62. In addition, when the depth of the vertical shaft T becomes deep, the discharge pipe part in the connection part with the discharge pipe part 62 62 Since the internal water pressure becomes high, the surplus water discharge pump 86 may be a hydraulic plunger pump that can push surplus water into the discharge pipe portion 62 against the high water pressure.
[0059]
Next, the boring device 54 will be described.
As shown in FIGS. 1 and 2, the boring device 54 performs boring on the ground in front of the cutter head 11 to investigate the state of spring water in the ground and can improve the ground when there is a large amount of spring water. It is configured. The boring device 54 has a boring device body 90 that can drive a boring rod with a bit attached to a tip portion thereof to advance and retreat and rotate, and can adjust the position and posture of the boring device body 90 and a plurality of hydraulic pressures. And a position and orientation adjustment mechanism 91 having a cylinder.
[0060]
A plurality of guide tubes 92 are fixed to the front body ring frame 23 so as to be inserted therethrough, and one of them is used, and the position and orientation of the boring device main body 90 are adjusted by the position / orientation adjusting mechanism 91 with respect to the used guide tube 92. The boring device main body 90 allows the boring rod to be inserted into the use guide tube 92, is inserted into the small-diameter hole 31b of the cutter head 11, and is advanced while rotating to boring the natural ground. A ground improvement material supply passage is formed in the boring rod, and the ground improvement material such as mortar can be injected from the tip of the boring rod to improve the ground. Each guide pipe 92 is provided with an open / close valve member so that the pipe line can be closed when not in use.
[0061]
The operation and effect of the shaft excavator 1 described above will be described.
First, the shaft excavator 1 is connected to the water supply pipe 61 extending from the ground near the upper end of the vertical shaft T to the excavator 2 and to the lower end of the water supply pipe 61 and extends to the ground near the upper end of the vertical shaft T. An excavation slip transport pipe 60 which is provided with a drain pipe portion 62 for transporting the slip to the ground together with water and which is added as the depth of the vertical shaft T becomes deeper, and a soil for supplying the water transport pipe 61 to the water transport pipe 61 The excavation slip discharge device 3 provided with the pump 63 is provided, and the excavation slip discharge device 3 is configured to transport the excavation slip to the ground by the water flow in the excavation slip transport pipe 60.
[0062]
That is, the excavation debris transfer pipe 60 becomes a siphon-like pipe in which the water supply pipe 61 and the discharge pipe 62 are connected in communication, and so-called siphon technology using the excavation debris transfer pipe 60 and the soil discharge pump 63 is used. By adopting, as the earth removal pump 63, even if a very high output pump and a large number of pumps are not provided, the vertical shaft depth, that is, the vertical length of the excavation slip transport pipe 60 is hardly affected. Even if the depth of the vertical shaft T becomes deep, it becomes possible to generate a water flow in the excavation debris transfer pipe 60 and convey the excavation debris. In this way, the structure of the excavation slip discharge device 3 can be simplified, the equipment cost can be reduced, and the operating load of the excavation slip discharge device 3 can also be reduced.
[0063]
The excavation debris discharge device 3 can cope by adding the excavation debris transfer pipe 60 as the depth of the vertical shaft T becomes deeper, and this addition operation can be easily performed. 3, the excavation gap can be transported at a stretch without being relayed from the excavator 2 to the ground, so that the excavation gap can be discharged efficiently, and as a result, the shaft construction period can be greatly shortened. In addition, even if the earth removal pump 63 breaks down or the operation of the earth removal pump 63 stops in the event of an emergency such as a power failure, at least water in the excavation debris transfer pipe 60 is retained without falling. It is possible to prevent the pipe 60 and the soil pump 63 from being damaged as much as possible, and the safety is excellent.
[0064]
Since the excavation gap throwing device 50 for pushing the excavation gap into the discharge pipe portion 62 is provided, the depth of the vertical shaft T becomes deeper and the vertical distance from the ground of the excavation gap conveyance pipe 60 becomes longer, so Although the water pressure in the excavation debris transfer pipe 60 becomes high, even in this case, the excavation debris throwing device 50 prevents the outflow of water from the excavation debris transfer 60 pipe and ensures that the excavation debris enters the discharge pipe 62. Can be pushed into.
[0065]
Since the excavation gap transport mechanism 51 that can transport the excavation gap excavated by the cutter head 11 together with water to the excavation gap input device 50 using the hydraulic pressure generated at the face of the cutter head 11 is provided. The driving load of 51 can be reduced, and the excavation slot can be transported to the excavation slot input device 50 easily and reliably.
[0066]
The separation device 52 for separating the excavation slurry transported by the excavation slurry transport mechanism 51 and the water is provided, and the excavation slurry separated there is supplied to the excavation slurry input device 50. Therefore, the excavation slurry separated by the separation device 52 is supplied. Can be efficiently pushed into the discharge pipe portion 62 by the excavation slot charging device 50, and the water separated by the separation device 52 can be reused, or excess water in the water can be reused from the excess water discharge pipe 85. It can be discharged to the excavation debris transfer pipe 60.
[0067]
The excavation slip transport mechanism 51 includes a transport pipe 75 having one end projecting to the front side of the cutter head 11 and the other end connected to the separation device 52, and a lead-out tube capable of leading water separated by the separation device 52 to the face side. 76 and a face water pressure adjusting pump 77 that is interposed in the outlet pipe 76 and can adjust the water pressure of the face.
[0068]
Therefore, by reusing the water separated by the separation device 52 by the face water pressure adjusting pump 77 and actively supplying it to the face of the cutter head 11, the water pressure of the face can be increased and adjusted to an appropriate pressure. The excavation sludge can be reliably and stably transported to the separation device 52 through the transport pipe 75 with the water pressure, and the load of the excavator 1 is supported by taking the water pressure into account. It is possible to efficiently perform excavation of the natural ground with the cutter head 11 by pressing the natural ground in front with an appropriate pressing force. Moreover, since the excavation gap transport mechanism 75 has a simple structure including the transport pipe 75, the outlet pipe 76, and the face water pressure adjustment pump 77, the equipment cost of the excavation gap transport mechanism 51 can be reduced.
[0069]
A leading earth removal cutter 33 provided at the tip of the movable transport pipe 75b, an advance / retreat drive mechanism 80 for driving the movable transport pipe 75b forward and backward, and a rotational drive mechanism 81 for rotationally driving the movable transport pipe 75b are provided. Therefore, the projecting position of the preceding soil removal cutter 33 is adjusted by the advance / retreat driving mechanism 80, the preceding soil removal cutter 33 is rotated by the rotation drive mechanism 81 to form a recovery hole, and excavation gaps are collected in the recovery hole, In some cases, the excavation sludge can be sucked up by the transport pipe 75 and recovered and transported while the preceding earth cutter 33 is moved forward and backward. It is possible to prevent the cutting head 11 from being left behind and prevent the cutter head 11 from rotating poorly or wearing out as much as possible.
[0070]
A surplus water discharge mechanism 53 having a surplus water discharge pipe 85 for discharging surplus water separated by the separation device 52 to the discharge pipe portion 62 and a surplus water discharge pump 86 interposed in the surplus water discharge pipe 85. Therefore, when there is a lot of spring water from the front ground and the water pressure of the face is too high, the water separated by the separation device 52 is positively discharged to the excavation slide transport pipe 60, and the water pressure of the face is lowered and adjusted. can do.
[0071]
Since the cutter head 11 is configured so that the gap excavated by the cutter head 11 gathers in the portion of the cutter head 11 where the tip of the transport pipe 75 protrudes, the excavation gap is surely secured in the preceding portion of the cutter head 11. The excavation gap is sucked up by the transport pipe 75, collected, and transported. The excavation gap is prevented from being left behind, and the rotation failure and wear of the cutter head 11 can be prevented as much as possible.
[0072]
Boring the ground in front of the cutter head 11 to investigate the state of spring water in the ground, and providing a boring device 54 that can improve the ground when there is a large amount of spring water, this boring device 54, Drill the ground in front of the cutter head 11 to investigate the state of the spring in the ground, and adjust the spring by improving the ground by injecting mortar when there is a large amount of spring. Can do.
[0073]
Next, a modified form of the shaft excavator will be described. However, the configuration other than the changed portion is basically the same as the configuration of the shaft excavator of the above embodiment, and the same components as those of the above embodiment are denoted by the same reference numerals and described.
1] In the cutter head 11A of the shaft excavating apparatus 1A of FIG. 10, the center portion of the front plate portion 31A is formed in a downward umbrella shape projecting greatly downward from the front plate portion 31 of the cutter head 11A. Yes. The plan view of the cutter head 11A is substantially the same as the plan view of the cutter head 11. The excavation surface by the cutter head 11A is an inclined surface that is greatly lowered toward the central portion. When the cutter head 11 is rotated, the excavation slip is lowered to the center so that the excavation scrape is scraped by a plurality of approach plates 34 and 35. It will be easier to gather in the part.
[0074]
2] In the excavation debris discharge device 3, an excavation debris transfer pipe is constituted by the outer pipe and the inner pipe inserted into the outer pipe so as to be loosely fitted, and a water supply passage is provided between the inner pipe and the inner pipe and the outer pipe. A drainage passage may be formed.
[0075]
3] Excavation throwing device 51 may be composed of a rotary charging device in addition to the piston charging device.
4] It should be noted that various modifications can be added and implemented without departing from the spirit of the present invention.
[0076]
【The invention's effect】
According to the shaft excavation device of claim 1, the water supply pipe portion extending from the vicinity of the upper end of the shaft to the excavator, and connected to the lower end of the water supply pipe portion and extending to the vicinity of the upper end of the shaft, the excavation sludge is conveyed to the ground together with water. Provided with an excavation sludge discharge pipe provided with an excavation sludge transfer pipe that is added as the shaft depth increases, and a soil discharge pump that supplies water for the sludge transfer to the water supply pipe section. The excavation sludge discharging apparatus is configured to convey the excavation sludge to the ground by a water flow in the excavation sludge transport pipe.
[0077]
That is, the excavation debris transfer pipe becomes a siphon-like pipe in which the water supply pipe section and the discharge pipe section are connected in communication, and by adopting a so-called siphon technology using this excavation debris transfer pipe and the soil discharge pump, Even if there is no very high power pump or a large number of pumps as a soil removal pump, the shaft depth is deeply affected by the vertical shaft depth, that is, the vertical length of the excavation sludge transfer pipe. However, it is possible to transport the excavation sludge by generating a water flow in the excavation sludge transport pipe, simplify the structure of the excavation sludge discharge device, reduce the equipment cost, and reduce the operating load of the excavation sludge discharge device it can.
[0078]
The excavation debris discharge device can respond by adding the excavation debris transfer pipe as the shaft depth becomes deeper, and this addition operation can be easily performed. Can be transported at once without being relayed from the excavator to the ground, so that excavation can be discharged efficiently, and as a result, the construction period of the shaft can be greatly shortened. Even if the earth removal pump breaks down or stops operating in case of an emergency such as a power outage, at least water in the excavation debris transfer pipe is retained without falling. Can be prevented as much as possible, and the safety is excellent.
[0079]
According to this shaft excavator, Since the excavation sludge input device that pushes the shaving into the discharge pipe section is provided, even when the depth of the shaft becomes deep and the water pressure in the excavation sludge conveyance pipe at the part where the excavation sludge is pushed becomes high, The outflow of water can be prevented, and the excavation gap can be reliably pushed into the discharge pipe portion.
[0080]
In addition, according to this shaft excavator, By using the hydraulic pressure generated at the face of the utter head, an excavation slip transport mechanism that can transport excavation slip excavated by the cutter head together with water to the excavation slip input device is provided. In addition to being able to reduce, excavation sludge can be transported easily and reliably to the excavation sludge input device.
[0081]
Furthermore, according to this shaft excavator, A separation device for separating the excavation sludge transported by the shaving transport mechanism and the water is provided, and the separated excavation sludge is supplied to the excavation sludge input device. It can be pushed in efficiently, the separated water can be reused, and the surplus water can be discharged into the excavation sludge transfer pipe.
[0082]
Moreover, according to this shaft excavator, By actively supplying the water separated by the separation device to the face of the cutter head with the blade pressure adjustment pump, the water pressure of the face can be increased and adjusted to an appropriate pressure. It can be transported reliably and stably to the separation device via the transport pipe, and while supporting the load of the excavator taking into account its hydraulic pressure, the cutter head can be moved to the front ground with an appropriate pressing force. It becomes possible to efficiently perform excavation with the cutter head. Moreover, since the excavation gap transport mechanism has a simple structure including a transport pipe, a lead-out pipe, and a face pressure adjustment pump, the equipment cost of the excavation gap transport mechanism can be reduced.
[0083]
Claim 2 According to the shaft excavation apparatus, the preceding soil removal cutter provided at the tip of the transport pipe, the advance / retreat drive mechanism for driving the advance soil removal cutter forward and backward, and the rotation drive mechanism for rotationally driving the preceding soil removal cutter, Therefore, the protruding position of the preceding earth cutter is adjusted, the leading earth cutter is rotated to form a collection hole, and excavation scraps are collected in the collection hole. While turning, the excavation sludge can be sucked up by the transport pipe and recovered and transported. As a result, it is possible to prevent the cutting head from being left behind and prevent the cutter head from rotating poorly or wearing out as much as possible.
[0084]
Claim 3 According to this shaft excavation apparatus, the surplus water discharge pipe connecting the separation device to the discharge pipe section and the surplus water discharge pump interposed in the surplus water discharge pipe are provided. When there is a lot of water and the water pressure at the face exceeds the appropriate pressure, the surplus water discharge pipe and surplus water discharge pump actively discharges the water separated by the separator to the excavation sludge transfer pipe, reducing the water pressure at the face. Can be adjusted to an appropriate pressure.
[0085]
Claim 4 According to the vertical shaft excavation device, the cutter head is configured so that the gap excavated by the cutter head is gathered at the portion of the cutter head where the tip of the transport pipe protrudes. The excavation gap can be collected reliably, and the excavation gap can be sucked up with a transport pipe, collected, and transported. The excavation gap can be prevented from being left behind and the cutter head rotation failure and wear can be prevented as much as possible.
[0086]
Claim 5 According to the shaft excavation device, the drill head is drilled on the ground in front of the cutter head to investigate the state of the spring in the ground, and when there is a large amount of spring, a drilling device that can improve the ground is provided. It is possible to adjust the spring water by drilling to the natural ground ahead, investigating the state of spring water in the natural ground, and improving the ground by injecting mortar when there is a large amount of spring water.
[0087]
Claim 6 According to this shaft excavation device, by providing the erector device, the shaft can be excavated while lining the inner surface of the tunnel excavated by the excavator with the segment. The reaction force of the plurality of first jacks is applied to the segments assembled on the inner surface of the tunnel to propel the front and rear cylinders, and the reaction force of the plurality of second jacks is applied to the rear cylinder fixed to the inner surface of the tunnel. It is also possible to propel the front trunk, and it is possible to excavate the front ground by the cutter head on the tip side by these two methods.
[0088]
Claim 7 According to the shaft excavation apparatus, when the plurality of first jacks drive the plurality of second jacks to propel the front trunk while the rear trunk is fixed to the inner surface of the tunnel by the plurality of first gripper mechanisms, the plurality of first jacks When driving the front cylinder and the rear cylinder by driving, the traveling direction of the excavator can be adjusted by the plurality of second gripper mechanisms.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a shaft excavating apparatus according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a main part of the excavator.
FIG. 3 is a view taken in the direction of arrow III in FIG. 3;
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a configuration diagram of the excavation debris transport mechanism and the excavation debris discharge device.
FIG. 6 is a perspective view of an excavation slot input device.
FIG. 7 is a partially cutaway perspective view of the excavation slot input device.
FIG. 8 is an operation explanatory diagram of the excavation slot input device.
FIG. 9 is an operation explanatory diagram of the excavation slot throwing device.
FIG. 10 is a longitudinal sectional view of a main part of an excavator according to a modified embodiment.
[Explanation of symbols]
T shaft (tunnel)
1 Vertical excavator
2 excavator
3 Excavation discharge device
10 Body member
10A rear trunk
10B Front trunk
11 Cutter head
12 Propulsion jack
12A 1st jack
12B 2nd jack
13 Electa device
14A First gripper mechanism
14B Second gripper mechanism
33 Leading earth cutter
50 Excavation throwing device
51 Excavation transport mechanism
52 Separation device
53 Excess water discharge mechanism
54 Boring equipment
60 Excavation transport pipe
61 Water pipe section
62 Discharge pipe section
63 Pump for earth removal
75 Transport pipe
76 Outlet tube
77 Face water pressure adjustment pump
80 advance / retreat drive mechanism
81 Rotation drive mechanism
85 Excess water discharge pipe
86 Excess water drainage pump

Claims (7)

In a shaft excavation device for shaft excavation, which has an excavator provided with a trunk member, a cutter head equipped on the distal end side of the trunk member, and a plurality of jacks for propelling the trunk member and the cutter head,
A water supply pipe section extending from the vicinity of the upper end of the shaft to the excavator, and a discharge pipe section connected to the lower end of the water supply pipe section and extending to the vicinity of the upper end of the shaft and transporting the excavation sludge together with water to the ground Excavation debris discharge device comprising an excavation debris transport pipe that is added as the depth increases, and a drainage pump that supplies debris transport water to the water supply pipe section ,
Excavation throwing device for pushing the excavation slip into the discharge pipe part;
An excavation gap transport mechanism capable of transporting excavation gap excavated by the cutter head together with water to the excavation gap throwing device using water pressure generated at the face of the cutter head, one end of which is directed to the front side of the cutter head A transport pipe with a protruding other end connected to the separator, a lead-out pipe that can lead water separated by the separator to the face, and a face water pressure that is interposed in the lead-out pipe and can adjust the water pressure of the face An excavation sludge transport mechanism having a regulating pump;
A separation device for separating the excavation debris transported by the excavation debris transport mechanism and water;
The excavation slot separated by the separation device is configured to be supplied to the excavation slot input device,
The shaft excavating device is configured to convey excavation gears to the ground by a water flow in the excavation gear carrier pipe. It is provided with a preceding soil removal cutter provided at the tip of the transport pipe, an advance / retreat driving mechanism for driving the preceding soil removal cutter forward and backward, and a rotation drive mechanism for rotationally driving the preceding soil removal cutter. The shaft excavation device according to claim 1 . Claim 1, characterized in that provided with the separator excess water discharge pipe for discharging the exhaust pipe section the separated excess water in, the excess water drainage pump interposed in the excess water discharge pipe The shaft excavator described in 1. 2. The shaft excavation device according to claim 1 , wherein the excavation by the cutter head is configured such that the gap excavated by the cutter head gathers in a portion of the cutter head where the tip of the transport pipe projects. Claim 1, characterized in that said cutter head in front of the natural ground with investigating the state of the earth Yamauchi spring water perform boring, provided ground improvement capable boring device when there is a large amount of spring water Vertical shaft drilling rig. An erector device for assembling a segment to the inner surface of the tunnel excavated by the excavator is provided.
The barrel member has a rear barrel and a front barrel that are relatively movable in the direction of excavation,
As the plurality of propulsion jacks, a plurality of first jacks for propelling and driving the rear cylinder with respect to the segments assembled by the erector apparatus, and a plurality of second jacks for propelling and driving the front trunk with respect to the rear trunk The shaft excavation device according to any one of claims 1 to 5 , wherein the shaft excavation device is provided. A plurality of first gripper mechanisms for releasably fixing the rear body to the inner surface of the tunnel, and a plurality of second grippers for fixing the front body to the inner surface of the tunnel so as to be unreleasable and adjusting an advancing direction of the excavator The shaft excavator according to claim 6 , further comprising a gripper mechanism.

Images