JP2700008B2 - Starter for shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a device for starting a shield excavator from a base provided in an auxiliary mine, and particularly to a large space under the ground at a depth of several meters or more underground. The present invention relates to a starting device suitable for use when constructing a structure to be constructed by a shield machine.

B. Background of the Invention As shown in FIG. 8, it has been proposed to construct a building AS of a large space BS underground at a large depth and use it for various facilities such as research facilities. In the construction of such a building AS, the conventional open-cutting method or caisson method of directly constructing a large-scale underground structure from the ground surface occupies a large site area on the ground during the construction period and has a large influence on the neighboring area. . Also,
For reasons such as the existing underground structure hindering the progress of construction,
In particular, in the center of the city and its suburbs, there is a demand for a construction method that solves these points instead of the conventional construction method in terms of environment and construction.

The construction AS shown in FIG. 8 is composed of a roof DO, a continuous wall CW extending downward from the roof DO, and a bottom BO. The applicant has proposed a construction method shown in FIG. I have.

First, a central shaft 1C and an outer shaft 1P are constructed at two positions, that is, the center of the building AS and the outer periphery of the roof DO. Next, the outer shaft
A work tunnel 3 for forming the underground connecting wall 2 with the lower end of 1P as a starting base 3a is constructed. The tunnel 3 for wall work is an annular tunnel located at the lower end of the roof DO and centered on the central shaft 1C. From the position of the central shaft 1C corresponding to the top end of the roof DO, the starting base 3a of the tunnel 3 for connecting walls
A single arc-shaft tunnel 4 is constructed toward the upper part of the tunnel. Next construction the ring tunnel 5 _-1 proximate to the upper outer surface of Renkabe working tunnel 3. This construction is performed by the ring shield machine 6. Ring tunnel 5 _-1 arcuate inclined shaft tunnel 4 is starting base and reach the base of the shield machine 6 in Renkabe working tunnel 3 concentric annular tunnel.

After construction of the first stage of the ring tunnel 5 _-1, arc inclined shaft transferred the starting position of the tunnel 4 in one step upward, ahead of the second stage adjacent to the upper outer surface of the ring tunnel 5 _-1 obtained by construction completed cyclic Build a small diameter ring tunnel _5-2 . This process is sequentially repeated, and the roof DO is sequentially formed by constructing the ring tunnel 5 in a plurality of steps.

Therefore, the multi-stage ring tunnels _{5-1 to} 5 _- n are connected to the central shaft.
Each of the ring tunnels 5 is a concentric tunnel centered on 1C, and each ring tunnel 5 always passes through the arc-shaft tunnel 4, and the arc-shaft tunnel 4 is a starting point and an arrival base of the ring tunnel 5.

When the ring tunnel 5 is to be successively and repeatedly constructed when constructing such a roof DO, first, as shown in FIG. 10, a scaffold 7 is constructed at the starting base 3a of the tunnel 3 for continuous wall work.
The shield machine 6 is mounted thereon via the starting stand 8. Also, a well-known ring-shaped entrance packing 9 for stopping water is attached to the wall of the arc-shape tunnel 4 on the starting side, and a well-known method for taking the propulsion reaction force of the shield machine 6 on the wall of the arc-shape tunnel 4 on the arrival side. Build a back truss 51.

Excavation is started from the center of the entrance packing 9 by the shield excavator 6, and excavated in a ring shape to construct the ring tunnel 5 and reach the original starting base 3a. In addition, when excavating to some extent, the propulsion reaction force of the shield excavator 6 can be obtained in each segment of the ring tunnel 5, so the back truss 51 used at the time of starting is removed, and after reaching the shield, 6 is recovered on the starting base 8 when reaching To be done. In this manner, when the construction of the first-stage ring tunnel 5 _-1 is completed, performs the setup of the construction of the second-stage ring tunnel _5-2.

 The setup is performed as follows.

As shown in FIG. 11, first, the shield machine 6 is pulled up by the winch W above the arc-shaft tunnel 4 and is made to stand by at the central shaft 1C. Next, the starting stand 8 and the back truss 51 are raised, and the shield machine 6 is moved to the second-stage ring tunnel.
5 reassembled anchorage 7 to be placed in the center of _-2. Then, the entrance packing 9 is attached to the wall of the arc-shaft tunnel 4 on the starting side, and then the shield excavator 6 is suspended from the central shaft 1C and installed on the starting stand 8 to obtain the second-stage ring tunnel _5-2. The construction of the building is completed. First stage ring tunnel for starting, excavating and reaching
_Same as 5 _-1 . By repeating this process, a multi-stage ring tunnel is constructed.

C. Problems to be Solved by the Invention However, the above construction has the following problems.

(1) At the time of start-up setup, shield shield machine 6 is connected to central shaft 1C
It is necessary to make it stand by every time, and the construction efficiency is poor. The lifting operation is difficult and dangerous in the following points.

・ It is difficult to secure a scaffold because the work is performed in the arc-shaped tunnel 4.

-Since the lifting operation is performed in the tunnel 4 that is inclined in an arc shape, the lifting operation in the vertical direction and the horizontal pulling operation in the horizontal direction are difficult operations. In particular, the upper part of the arc-shaft tunnel 4 is almost horizontal, and it is difficult to lift the shield machine 6.

(2) Since the scaffold is reassembled at each step, a great deal of time is required for setup.

(3) It is necessary to attach the entrance packing 9 every time at the time of starting setup, and it takes time to set up.

(4) When the excavation of the ring tunnel of an arbitrary stage is completed and reaches the starting base and the shield excavator 6 is collected in the base,
Since there is no packing on the arrival side corresponding to the entrance packing 9 on the starting side, groundwater and earth and sand from the ground erupt from the outer peripheral portion of the shield and cause collapse of the ground. In order to prevent this, it is necessary to stop the water by improving the ground at the reaching portion, which requires a lot of time and cost.

(5) Since the propulsion reaction force at the time when the shield machine 6 starts excavation is supported by the arc-shaft tunnel 4 via the back truss 51, the arc-shape tunnel 4 needs to have a strong structure.

(6) The attitude of the shield excavator 6 at the time of starting is an important management factor in tunnel construction, but every time the ring tunnel 5 of each stage is constructed, the entire scaffold is reassembled, and the level adjustment work of the starting base is complicated. And difficult.

An object of the present invention is to improve workability when constructing a tunnel in a plurality of steps from an auxiliary shaft.

D. Means for Solving the Problems The present invention will be described with reference to FIG. 1 which is an embodiment. The present invention is installed in an auxiliary pit 4 which is substantially orthogonal to the tunnels _{5-1 to} 5 _- n to be constructed. The present invention is applied to a starter of a shield excavator for sequentially constructing tunnels _{5-1 to} 5 _- n in a plurality of stages by the shield excavator 6. Hereinafter, each claim will be described.

According to the present invention, the shield excavator 6 is accommodated, the shield excavator 6 is started from the starting side, the tunnel excavation is started from the auxiliary pit 4, and the shield excavator is started from the arrival side facing the start side. Starting means 10 for causing 6 to reach auxiliary pit 4
A thrust support means 20 for receiving a propulsion reaction force of the shield machine 6 at the time of starting, and a lifting means 30 for raising and lowering the start reaching means 10 and the thrust support means 20.

According to the present invention, the thrust supporting means 20 is pressed against the entrances and exits of the tunnels _{5-1 to} 5 _- n constructed from the auxiliary pit 4, respectively, so that the propulsion reaction force is applied to the tunnels _{5-1 to} 5 _- n. A pair of reaction force supports 221 to be transmitted
And pressing means 222 for pressing the reaction force support 221 toward the tunnel entrance.

-Claim 3-In the present invention, the elevating means 30 is provided with a built tunnel _5-1.
-5 _- n, a pair of reaction force support members 321 which respectively hold the elevating means 30 by pressing against the entrances and exits thereof, and a support device 31, comprising a pressing means 322 for pressing the reaction force support members 321 against the tunnel entrance. 32, and a lifting / lowering actuator 34 that is connected to the support devices 31 and 32 and that moves up and down the starting and reaching means 10 and the thrust support means 20.

-Claim 4-In the present invention, the thrust support means 20 and the lifting / lowering means 30 have gripper devices 23 and 33, respectively, which press the inner wall of the auxiliary pit in a direction perpendicular to the excavation direction and support itself.

In the present invention, the starting and reaching means 10 is configured such that the shield machine 6 accommodated starts in the axial direction, and the shield machine 6 that has completed the excavation arrives from the reaching side facing the starting side, A starting cylindrical body 13 serving as the housing portion, and an annular sealing material provided on the starting side of the starting cylindrical body 13 so as to be able to advance and retreat in a digging direction and pressed against an inner wall of an auxiliary pit to be excavated, and a seal when starting. An entrance packing 134 that seals between the outer peripheral surface of the shield machine 6 that penetrates through the central portion of the material and stops water,
An annular sealing material that is provided so as to be able to advance and retreat in the direction opposite to the excavation direction on the arrival side of the starting cylindrical body and is pressed against the inner wall of the auxiliary pit to be excavated, and penetrates the central portion of the sealing material when reaching. An exit packing 135 that seals the gap between the outer peripheral surface of the shield machine 6 and water blocking, and an entrance packing 134
And packing actuators 136 and 137 (FIG. 3) for respectively moving the exit packing 135 forward and backward.

-Claim 6-As can be seen from Figs. 3 and 4,
The starting and arriving means 10 accommodates the shield excavator 6 that is axially started from the starting side, and the shield excavator 6 that has completed the excavation arrives from the arrival side opposite to the starting side and starts as an accommodating part. A cylindrical body 13, a roller 153 provided at a predetermined interval in a circumferential direction of the starting cylindrical body 13 and rotating the contained shield machine 6 around its axis, and a roller drive for rotating the roller 153 It includes an actuator 154 and a centering actuator 152 for centering and holding the shield machine 6 by moving each roller 153 in and out of the starting cylinder 13 in the radial direction.

-Claim 7-As can be seen from Figs. 3 and 4,
The starting and reaching means 10 is a support frame 11, 1 that supports the starting cylinder 13.
2, and a posture correcting actuator 142 that corrects the excavation posture of the shield excavator 6 forward and downward via the support frames 11 and 12.

-Claim 8-In the present invention, the starting reaching means 10 includes a detachable reaction force plate 18 for transmitting the propulsion reaction force at the time of starting the shield machine to the thrust support means 20. The reaction force plate 18 is attached, and the reaction force plate 18 is not removed at the time of arrival, so that the passage of the shield machine 6 reaching from the arrival side is secured.

According to the present invention, the starting and reaching means 10, the thrust support means 20, and the elevating means 30 are provided on the guide rail 4 provided in the auxiliary shaft 4.
a, 4b, which are provided with guide roller devices 17, 24, 35.

E. Action The starting and reaching means 10 and the thrust support means by the elevating means 30
Ascend and descend 20 and start at the center of the tunnel to be built
The center of 10, ie, the axis of the shield machine 6 is aligned. Then, the shield excavator 6 is started from the start side of the start arrival means 10, and excavation is performed by the thrust support means 20 while taking the excavation reaction force of the shield excavator 6. After the excavation, the shield excavator 6 breaks through the wall of the auxiliary shaft 4 and reaches the starting means 10 from the arrival side.

-Claim 2-A pair of reaction support members 221 are pressed against the entrance of the tunnel, and the thrust support means 20 takes the excavation reaction force of the shield excavator 6.

-Claim 3-The reaction force support 321 of the lifting / lowering means 30 is inserted into the tunnel and pressed against the entrance, whereby the lifting / lowering means 30 is positioned in the auxiliary pit 4. By driving the lifting / lowering actuator 34, the starting and reaching means 10 and the thrust support means 20 are raised and lowered. Conversely, when the starting and reaching means 10 and the thrust support means 20 are positioned and the elevating actuator 34 is driven, the elevating means 30
Can be moved.

-Claim 4-When the gripper devices 23 and 33 are pressed against the inner wall of the auxiliary shaft 4,
The thrust support means 20 and the lifting / lowering means 30 are held at the respective positions. Therefore, by cooperating the gripper devices 23 and 33 with the lifting actuator 34, the tunnel
5 _-1 5 _- at the stage before n is construction, starting reach means 10, thrust supporting means 20, the lifting means 30 can be positioned by inserting the auxiliary pit 4.

-Claim 5-When starting, the entrance packing 134 is pressed against the inner wall of the auxiliary shaft 4. At the start, the shield machine 6 is a starting cylinder
13 from the starting side through the central hole of the entrance packing 134, the outer peripheral surface of the entrance packing 13
Sealed with 4. Therefore, water can be stopped at the time of starting. At the time of arrival, the exit packing 135 is pressed against the inner wall of the auxiliary shaft 4. Upon reaching, the shield machine 6 that has completed the excavation passes through the center hole of the exit packing 135 and proceeds to the arrival side of the starting cylinder 13, so that the outer peripheral surface thereof is sealed with the exit packing 135. For this reason, it is possible to stop the water when it reaches.

-Claim 6-When the roller 153 is rotated, the shield machine 6 rotates around its axis, and the horizontal level is adjusted. Roller 15
When 3 is advanced in the radial direction of the starting cylinder 13, the axis of the shield machine 6 matches the axis of the starting cylinder 13.

-Claim 7-By contracting the attitude correcting actuator 142, the attitude of the starting cylinder 13, that is, the shield excavator 6 at the time of starting is adjusted.

At the time of starting, the propulsion reaction force of the shield machine 6 is taken by the thrust support means 20 via the reaction force plate 18. When the shield excavator 6 advances and a reaction force is taken in the tunnel constructed, the reaction plate 18 is removed. Thereby, a passage at the time of reaching the shield machine is secured.

-Claim 9-The starting and reaching means 10, the thrust support means 20, and the elevating means 30 move up and down with the respective guide roller devices 17, 24, 35 guided by the guide rails 4a, 4b of the auxiliary shaft 4. Therefore, the excavation direction of the shield excavator 6 always faces a fixed direction.

In the above sections D and E for describing the configuration of the present invention, the drawings of the embodiments are used for easy understanding of the present invention, but the present invention is not limited to the embodiments.

F. Embodiment An embodiment of a starter for a shield machine according to the present invention will be described with reference to FIGS.

Figures 1 and 2 show the third stage ring tunnel _5-3.
Shows a state in which the setup for excavating is completed. The starting device of the shield excavator includes a starting part (starting arrival means) 10 of the shield excavator 6, a thrust support part (thrust supporting means) 20 for supporting the thrust of the shield excavator 6, a starting part 10, and a thrust support. A lift section (raising / lowering means) 30 for raising and lowering the section 20 along the guide rails 4a and 4b protruding from the inner peripheral wall having the maximum diameter and the inner peripheral wall having the minimum diameter in the arc radial direction of the arc-shape tunnel 4. Up and down in the arc-shaft tunnel 4.

{F-1: Starting part 10} FIGS. 3 and 4 show details of the starting part 10. FIG.

The starting unit 10 includes a base frame 11, two bark truss frames 12 erected on both sides of an upper surface of the base frame 11, a starting cylinder 13, and a posture correcting device 14 for the starting cylinder 13.
And a roller device 15 for adjusting the horizontal level, an attaching / detaching device 16 for attaching / detaching the reaction force plate 18 to / from the back truss frame 12, and a guide roller device 17. Here, the base frame 11 and the back truss frame 12 constitute a support frame.

The left side of FIG. 3 is the starting side of the shield machine 6 and the right side is the arrival side. A reaction force plate 18 is provided on the opposing surfaces of the arrival side ends of the pair of back truss frames 12 by the cylinder 161 of the attaching / detaching device 16.
There is provided a groove 121 into which the hole is inserted. Posture correction device 1
4 comprises a frame 141 and four position correcting jacks 142 for supporting the frame 141 at four points on the base frame 11 at the front, rear, left and right. adjust.

The starting cylinder 13 is formed by connecting the outer periphery 131 and the inner cylinder 132 concentrically by a joint plate 133, and a ring-shaped entrance packing 134 on the starting side and a ring-shaped on the arrival side between the two cylinders. The exit packings 135 are slidably fitted respectively. The entrance packing 134 is a flexible sealing material such as rubber, for example, and is formed by projecting a flange-like lip 134b from the inner peripheral surface of the annular body 134a.
The inner diameter of 4a is slightly larger than the outer diameter of shield machine 6,
The inner diameter of the lip 134b is smaller than the outer diameter of the shield machine 6. The exit packing 135 is also a similar flexible sealing material, and includes a similar annular body 135a and a flange-like lip 135b. The inner diameter of the annular body 135a is slightly larger than the outer diameter of the shield machine 6 and The inner diameter is smaller than the outer diameter of the shield machine 6. These two packings 134, 135 are telescopic jacks 136, 137 arranged at equal intervals in the circumferential direction between the outer cylinder 131 and the inner cylinder 132, and are capable of moving back and forth to the starting side and the reaching side, respectively. That is, the bottom of each telescopic jack is connected to the joining material 133 of the starting cylinder 13, and the rod is connected to each of the packings 134 and 135. The entrance packing 134 is pressed against the inner wall of the arc-shaft tunnel 4 on the starting side by the telescopic jack 136, and the exit packing 135 is pressed against the inner wall of the arc-shaft tunnel 4 on the reaching side after the reaction plate 18 is removed. The water is stopped on the starting side and the arrival side, respectively. Therefore, the tips of the annular bodies 134a and 135a of the packings 134 and 135 are formed in a shape conforming to the inner wall shape of the arc-shape tunnel 4 to be pressed.

The horizontal level adjusting roller device 15 includes an outer cylinder 131 and an inner cylinder 132.
Are provided at equal intervals in a circumferential direction between the guide roller device 15 and the guide roller device 15 before and after the frame 151 separates and comes into contact with the inner wall of the outer cylinder 131 in the radial direction of the starting cylinder 13.
Cylinder 152 and roller 15 pivotally supported by frame 151
3 and a hydraulic motor 154 for rotating the roller 153. When all the telescopic jacks 152 are extended to the stroke end, the shield excavator 6 installed in the starting cylinder 13
Coincides with the center of the starting cylinder 13. When the shield machine 6 is installed in the starting cylinder 13 while rotating left or right, the roller 153 is aligned with the center of rotation of the shield machine 6 and the center of the starting cylinder 13. To rotate the shield machine 6 to adjust its horizontal level.

The reaction force plate attaching / detaching device 15 has a telescopic jack 161 having a base end connected to the base frame 11, and the piston rod 1
61a is connected to the upper end of the reaction plate 18. Furthermore, on the upper and lower sides of each side of the pair of back truss frames 12,
A pair of guide roller devices 17 that roll on rails 4a and 4b protruding from the arc-shaft tunnel 4 to guide the starting portion 10
Are provided respectively. The guide roller device 17 includes a roller bracket 171 and three guide rollers 172 pivotally supported by the roller bracket 171 as shown in FIG. 5 which is a cross-sectional view taken along line VV in FIGS. Consisting of

The operation of each unit of the starting unit 10 configured as described above will be described.

(The attitude correction device 14 and the horizontal level adjustment roller device 1
5) First, the shield excavator 6 is installed in the starting cylinder 13 with the centering jack 152 contracted, and the centering jack 15 is set.
Extend 2 Thereby, the axis of the shield machine 6 and the center of the starting cylinder 13 match. At this time, when the shield excavator 6 is installed to rotate to the left or right, the hydraulic motor 154 is rotated to rotate the roller 153, thereby correcting the rotation direction of the shield excavator 6. Adjust the horizontal level in the direction perpendicular to the excavation direction. Next, the following corrections are made by expanding and contracting the four attitude correction jacks 142.

When all four are extended and contracted simultaneously, the shield machine 6 can be moved up and down in parallel.

When the two jacks on the starting side are extended and the two jacks on the reaching side are contracted, the attitude of the shield machine 6 can be corrected to rise forward.

When the two jacks on the starting side are contracted and the two jacks on the reaching side are extended, the attitude of the shield machine 6 can be corrected to lower forward.

(Entrance Packing 134) The packing pressing telescopic jack 136 is extended, and the end of the entrance packing 134 is pressed against the starting side inner wall of the arc-shape tunnel 4. In this state, the reaction force plate 18 is inserted into the groove 121 of the back truss claim 12 by the expansion / contraction jack 161 for attaching and detaching the reaction force plate, and the temporary segment 19 is interposed between the shield machine 6 and the reaction force plate 18 to perform the shield excavation. The machine 6 is propelled. The shield machine 6 cuts the inner wall of the arc-shape tunnel 4 to form a lip 1 at the center of the entrance packing 134.
34b is pushed out to advance forward as indicated by reference numeral 6F in FIG.
At this time, since the lip 134b strongly tightens the outer peripheral surface of the shield machine 6, groundwater from the ground can be sealed. The temporary segment 19 is removed when the shield machine 6 has advanced to some extent.

(Exit packing 135) Before the shield machine 6 almost excavates the ring tunnel 5 and cuts the reaching side wall of the arc-shaft tunnel 4, the reaction plate 18 is removed from the back truss frame 12 by the reaction plate attaching / detaching jack 161. Remove. Jack 137 for packing press
When the gasket is extended, the exit packing 135 protrudes rearward, and its tip is pressed against the inner wall on the arrival side of the arc-shaft tunnel 4. In this state, the shield machine 6 arrives as indicated by reference numeral 6R in FIG. 5, and cuts the wall of the arc-shape tunnel 4 by a pit (not shown) and returns to the starting portion 10. At this time, the shield machine 6 pushes through the inner diameter of the lip 135b of the exit packing 135 and passes therethrough.
Can strongly tighten the outer peripheral surface of the shield machine 6 and seal groundwater from the ground.

(Guide Roller Device 17) The guide rollers 172 press the convex guide rails 4a and 4b provided on the outer diameter side and the inner diameter side of the arc-shape tunnel 4 from three directions so as to be rotatable. Position with respect to 4.

{F-2: Thrust support portion 20} The thrust support portion 20 includes a thrust support frame 21 integrally connected to the lower surface of the base frame 11, a reaction force support device 22, a gripper device 23, and a guide roller device 24. Consists of

The thrust support frame 21 includes a starting-side standing wall 211 and a reaching-side standing wall 2 that are erected from the lower surface of the base frame 11 below.
12, a base 213 connected to the lower ends of the compatible walls 211 and 212 and parallel to the base frame 11, a base frame 11 and a base 2
13 and a connecting member 215 connecting the compatible walls 211 and 212 at the center thereof. The rectangular walls are formed in the compatible walls 211 and 212, and the reaction force support device 22 is provided therein. The constituent reaction force support 221 penetrates.

The reaction force support 221 includes a guide section 221a having a rectangular cross section that slides in the rectangular hole, a cylindrical section 221b having a tip slightly smaller in diameter than the ring tunnel 5, a guide section 221a and the cylindrical section 22.
1b, and a flange 221c substantially equal to the segment outer diameter of the ring tunnel 5. Four telescopic jacks 222 are provided at the rear end of the reaction force support 221 respectively.
The bottom side of each of the telescopic jacks 222 is connected to a central support 214 of the thrust support frame 21. Therefore, the starting-side and reaching-side reaction force supports 221 can take the propulsion reaction force of the shield excavation 6 in a state in which the flange 221c is pressed against the end face of the ring tunnel 5 by the telescopic jack 222.

The gripper device 23 includes a gripper telescopic jack 231 whose bottom side is connected to the side surface of the central support 214, a presser 232 connected to the piston rod thereof, and an upright wall connecting guide for guiding the advancement and retreat of the presser 232. And a guide rod 233 that is guided and slid by a linear bearing 234 provided on a member 215, and a holding tool 232 is pressed against the inner wall of the arc-shape tunnel 4 by an extendable jack 231 so that the suction support portion 20 is formed. 4 and fixedly held.

The contact portion of the holding member 232 with the inner wall of the arc-shape tunnel 4 is formed so as to straddle the rails 4a and 4b, and the tip portion is made of a flexible material such as rubber molded into a shape conforming to the inner wall surface of the arc-shape tunnel 4. Sex material 235 is stuck.

The guide roller device 24 includes a base frame 11 and a base 21.
3 are provided on both side surfaces, and the guide roller device 17 of the starting portion 10
Roller bracket 241 and three guide rollers 2
42, and rolls on the guides 4a and 4b of the arc-shape tunnel 4 to guide the thrust support 20.

The bottom side of a vertically movable telescopic jack 34, which will be described later, of the elevating unit 30 is chamfered at the four corners of the standing walls 211 and 212 so that the thrust support unit 20 configured as described above is moved up and down by the elevating unit 30 integrally with the starting unit 10. Are linked.

The operation of the thrust support unit 20 configured as described above will be described.

As will be described later, the center of the ring tunnel 5 already built and the center of the thrust support portion 20 are made to coincide with each other by the elevating portion 30, and when the telescopic jack 222 is extended in this state, the distal end portion 21b of the reaction force support member 221 is extended. Enters the inside diameter of the ring tunnel 5, and the flange 221 c is pressed against the end face of the ring tunnel 5. Therefore, both the starting-side and reaching-side reaction force supports 22
1 allows the entire thrust support 20 to be fixed to the arc-shaft tunnel 4. When the telescopic jack 222 is contracted and the reaction force support 221 is contracted, the thrust support 20 becomes free with respect to the arc-shape tunnel 4. Further, in this state, the telescopic jack 231 of the gripper device 23 is extended, and the pressing tool 232 is extended to the inner wall of the arc-shaft tunnel 4, so that the thrust support portion 20 can be positioned at an arbitrary position.

{F-3: elevating unit 30} The elevating unit 30 includes an elevating frame 31, a reaction force support device 32,
It comprises a gripper device 33, a telescopic jack 34 for elevating and lowering, and a guide roller device 35.

The lift frame 31 is formed in substantially the same shape as the thrust support frame 21, and a pair of upper and lower bases 311, 312,
Starting and reaching side walls 313 and 314 connecting the first and third bases, a central support 315 connecting the upper and lower bases 311 and 312,
314 at the center thereof.

The four corners of the standing walls 313, 314 are the standing walls 21 of the thrust support frame 21.
The piston rod 342 of the telescopic jack 4 is connected to a substantially central portion of the chamfer in the same manner as 1,212. Ryokan wall 3
13,314 are formed with rectangular holes, through which the reaction force support 321 constituting the reaction force support device 32 penetrates. Like the reaction force support 221, the reaction force support 321 includes a guide portion 321 a having a rectangular cross section that slides in the rectangular hole, and a cylindrical portion 321 b having a tip portion slightly smaller in diameter than the ring tunnel 5, It is formed of a flange 321c which is formed at a connecting portion between the guide portion 321a and the cylindrical portion 321b and which is substantially equal to the segment outer diameter of the ring tunnel 5. The piston rods of the four extendable jacks 322 are connected to the rear ends of the reaction force supporters 321, respectively.
It is connected to one central support 315. Therefore, the reaction force supporter 321 on the starting side and the arrival side receives the propulsion reaction force of the shield machine 6 and the starting part 10 and the thrust supporting part 20 while the flange 321 c is pressed against the end face of the ring tunnel 5 by the telescopic jack 322. Take up and down reaction force.

Further, a gripper device 33 and a guide roller device 35 configured in the same manner as the thrust support portion 20 are protrudingly provided on both sides of the lift frame 31 in the lift portion 30. The description of the two devices 33 and 35 is omitted.

The operation of the lifting unit 30 configured as described above will be described.

When the thrust support portion 20 is supported by the ring tunnel 5 with a pair of reaction force support members 221: The pair of reaction force support members 321 of the elevating portion 30 are connected to the ring tunnel 5.
When the telescopic jack 34 for elevating is extended in the retracted state, the elevating part 30 descends in the arc-shape tunnel 4, and when the telescopic jack 34 is contracted, the elevating part 30 ascends in the arc-shape tunnel 4.

Thrust support part 20 is circular arc tunnel 4 and ring tunnel 5
When the lifting / lowering portion 30 is inserted into the ring tunnel 5 and the lifting / lowering portion 30 is fixed to the arc-shaft tunnel 4, the elongating telescopic jack 34 is extended. Start 10
And the thrust support 20 rises in the arc-shaft tunnel 4,
When the telescopic jack 34 is contracted, the starting part 10 and the thrust support part
20 descends in the arc-shaft tunnel 4. Even when the lifting unit 30 is fixed at an arbitrary position by the gripper device 33, the starting unit 10 and the thrust support unit 20 can be raised and lowered in the same manner.

Next, the starting part 10, the thrust support part 20, the elevating part 30
The procedure for constructing the ring tunnels _5-1 to 5 _- n with the starting device composed of the following will be described with reference to FIG.

The starting unit 10, the thrust support unit 20, the lifting unit 30, and the shield machine 6 are carried into the base provided at the lower end of the central shaft 1C from the ground. At the base, the shield machine 6 is installed in the starting section 10 and the telescopic jack 15 of the horizontal level adjustment roller device 15 is installed.
The shield excavator 6 is extended with the roller 153 and the starting cylinder 13 is extended.
Fix inside. Next, the lifting unit 30 is first inserted into the inclined tunnel 4 while the guide roller devices 35 of the lifting unit 30 are engaged with the rails 4 a and 4 b of the inclined tunnel 4. The lifting unit 30 is fixedly held in the arc-shaft tunnel 4 by the gripper device 33 to contract the lifting telescopic jack 34, and the thrust support unit 20, the starting unit 10 and the guide roller devices 17, 24 thereof are connected to the rails 4a, 4b. And is drawn into the arc-shaft tunnel 4. Next, the thrust support unit 20 is fixedly held in the arc-shape tunnel 4 by the gripper device 23, and the lifting unit 30
Contracts the gripper device 33 and makes it free in the arc-shape tunnel 4 to extend the elevating telescopic jack 34,
30 is lowered in the arc-shaft tunnel 4 and is fixed and held again by the gripper device 33 at that position.

By repeating such operations, the starting portion 10, the thrust support portion 20, and the elevating portion 30 are inserted into the arc-shape tunnel 4 as shown in FIGS. 7 (a-1) and 7 (a-2).

On the other hand, as shown in FIG. 7 (b-1), a back truss 51 is installed on the base 3a of the tunnel 3 for connecting walls, and the elevating part 30 inserted to the lower end of the arc-shaft tunnel 4 is installed.
Is lowered into the base 3a by the telescopic jack 34 for elevating. Then, the reaction force support 321 of the elevating unit 30 is pressed against the back truss 51 to fix and hold the elevating unit 30. When the elevating telescopic jack 34 is contracted in this state, the thrust support 20 in the free state is lowered into the base 3a. Thereafter, the reaction force support 221 of the thrust support portion 20 is pressed against the back truss 51, the reaction force support 321 of the elevating portion 30 is released from the back truss 51, and the telescopic jack 34 is extended to position the elevating portion 30. Decide. By repeating such an operation, FIG. 7 (b-1), (b-2)
As shown in, align approximately the center of the start portion 10 to the drilling center of the first-stage ring tunnel 5 _-1.

(Construction of the first-stage ring tunnel 5) The reaction force supports 221 and 321 of the lifting unit 30 and the thrust support unit 20 are pressed against the back truss 51 to fix the lifting unit 30 and the thrust support unit 20. As the center of the shield machine 6 to the center of the first-stage ring tunnel 5 _-1 to be construction matches the height of the shield machine 6 by the posture correcting telescopic jack 142 and before uplink and Maekudari Is corrected, and the attitude correcting roller 153 is rotated to correct the circumferential inclination of the shield machine 6.

After correcting the starting position of the shield machine 6 as described above, the upper four position correcting rollers 153 are separated from the shield machine 6, and the upper portion of the shield machine 6 is unlocked. Extend the expansion jack 136 and enter the entrance packing 1.
The leading end of 34 is pressed against the inner wall on the starting side of the arc-shape tunnel 4 to be ready to start.

In this state, the shield excavator 6 is propelled by a hydraulic source (not shown) while the temporary segment 19 is interposed between the shield excavator 6 and the reaction force plate 18. Shield machine 6 is entrance packing 134
The lip 134b is pushed open and passes, so it digs forward while stopping the water with the entrance packing 134. When the reaction force is taken by this segment for constructing the ring tunnel 5, the temporary segment 19 in the arc-shaft tunnel 4 is removed, and the reaction plate 18 is removed from the back truss frame 12 by the expansion jack 161 to expand and contract. Jack 137
To push the tip of the exit packing 135 against the inner wall of the arc-shape tunnel 4 on the arrival side. When the shield machine 6 has completely started moving from the starting cylinder 13, the two lower posture correcting rollers 153 used for centering are contracted. The shield machine 6 excavates the ring tunnel 5 in an annular shape, breaks the wall of the arc-shape tunnel 4 on the arrival side, and returns into the starting cylinder 13 of the starting portion 10. At this time, since the shield machine 6 excavates by pushing and expanding the lip 135b of the exit packing 135, the water is stopped by the exit packing 135.

As described above, the first-stage ring tunnel _5-1 near the upper part of the outer peripheral surface of the continuous wall working tunnel 3 is constructed.

(Preparation for the construction of the second-stage ring tunnel 5) The outer peripheral surface of the shield machine 6 returned to the starting cylinder 13
The two position correcting rollers 153 are pressed to fix the shield machine 6. Next, the reaction force support 221 of the thrust support section 20 is retracted to release the thrust support section 20, and then the elongating telescopic jack 34 is lifted.
Extended and raise the thrust support portion 20 such that the center of the reaction force supporting member 221 of the thrust support portion 20 is already located at the center of the construction is a ring tunnel 5 _-1. It is advanced a reaction force supporting member 221 of the thrust supporting part 20 in this state, fixes and holds the thrust supporting part 20 by pressing the distal end flange 221c on the end face of the ring tunnel 5 _-1 in an arcuate inclined shaft tunnel 4. Thus, FIG. 7 (C-1), as shown in (C-2), the center and is roughly aligned in the center of the shield machine 6 of the second-stage ring tunnels _5-2 to be construction Is done. Then, the reaction force support 321 of the elevating unit 30 is contracted to make the elevating unit 30 free.
30 is raised, and the reaction force support 321 is pressed against the back truss 51 and fixedly held at that position as shown in FIGS. 7 (d-1) and 7 (d-2).

Next, the starting posture of the shield machine 6 is corrected in the same manner as described above, the entrance packing 134 is pressed against the inner wall of the arc-shape tunnel 4, the reaction plate 18 is mounted, and the upper roller 15 is mounted.
After the evacuation of 3, the shield machine 6 is propelled.
Reaction force of the propulsion, the reaction force plate 18, back truss frame 12, the base frame 11 is transmitted to the ring tunnel 5 _-1 of the first stage through the thrust supporting frame 21 and its reaction force supporting member 221. The same applies to the arrival. Thus construction of the second stage of the ring tunnels _5-2 is completed.

After the construction of the second-stage ring tunnel _5-2 , thrust support 20
The reaction force support 221 is retracted to release the thrust support 20 and the elevating jack 34 is extended to elevate the thrust support 20 and the center of the second-stage ring tunnel _5-2 built. The center of the reaction support 221 of the thrust support 20 is aligned. Then, the reaction force support 221 is inserted into the ring tunnel _5-2 to fix the thrust support 20 in the same manner as described above. This state is shown in FIGS. 7 (e-1) and (e-2).

Then, the center of the reaction force supporting member 321 of the elevating unit 30 by contracting the lifting telescopic jack 34 in the same manner together with the center of the first-stage ring tunnel 5 _-1, ring tunnel the reaction force supporting member 321 _5-1 is inserted to fix the lifting unit 30. Then, roughly coincides with the center of the 3-stage ring tunnel 5 _-3 center of the shield machine 6 is to construction. afterwards,
The back truss 51 installed in the base of the ring tunnel 3 for the continuous wall work is removed, and the third-stage ring tunnel is dug in the same manner as described above. This state is shown in FIG. 1, FIG.
This is shown in the figures and FIGS. 6 and 7 (f-1) and (f-2).

By repeating the above operations, the ring tunnels 5 of n stages are sequentially constructed.

In the above, the case of constructing an annular tunnel over a plurality of steps has been described.However, a tunnel in which a shield excavator that starts from one inner wall side of the auxiliary pit returns to the other inner wall side of the auxiliary pit is constructed in multiple steps. If it does, it can be used not only for an annular shape but also for a polygonal annular tunnel. Further, although the thrust support portion 20 is provided below the starting portion 10, the positional relationship may be reversed. Further, although the auxiliary pit has been described as an arcuate pit, it may be a straight inclined pit or a vertical pit.

G. According to the present invention, according to the present invention, a starting arrival means for accommodating a shield machine and a thrust support means for taking a reaction force of excavation of the shield machine are installed in the auxiliary mine, and these are lifted and lowered in the auxiliary mine by the elevating means. Since it is possible to move up and down, the setup work when starting the auxiliary mine and constructing a multi-stage tunnel as a destination base becomes extremely simple, and the construction efficiency is greatly improved.

According to the second and third aspects of the present invention, excavation reaction force can be obtained via the thrust support means in the constructed tunnel, and the inner wall of the auxiliary pit does not need to be so strong. Further, the elevating means can be reliably positioned using the manufactured tunnel.

According to the fourth aspect of the present invention, the starting device moves on its own in the auxiliary pit while accommodating the shield machine without requiring other equipment such as a winch.

According to the fifth aspect of the present invention, the entrance packing can be extremely easily installed before the vehicle starts, and the construction efficiency is improved. In addition, the exit packing ensures that water is stopped when the vehicle arrives, eliminating the need for ground improvement work on the arrival side, thereby greatly reducing construction efficiency and construction costs.

According to the invention of claim 6, horizontal level adjustment and centering of the shield machine can be easily performed, construction efficiency is improved, and tunnel construction with high accuracy is possible.

According to the seventh aspect of the present invention, the work of correcting the attitude of the shield machine becomes easy, the construction efficiency is improved, and the tunnel construction with high accuracy is possible.

According to the eighth aspect of the present invention, since the reaction plate provided on the starting and reaching means can be removed, a passage for reaching the shield machine can be easily secured.

According to the ninth aspect of the present invention, the tunnel is excavated in a fixed direction with respect to the auxiliary mine, and the setting of the excavation direction of the shield excavator can be simplified at the time of constructing the tunnel at each step, and the construction efficiency is improved.

[Brief description of the drawings]

1 to 7 illustrate one embodiment of the present invention.
FIG. 1 is a front view of the starting device in the auxiliary pit viewed from the longitudinal section direction of the auxiliary pit, FIG. 2 is a side view of the starting device in the auxiliary pit viewed from the cross section including the central shaft and the arc-shaft tunnel, FIG.
The figure is a side cross-sectional view of the starting portion viewed from the line III-III in FIG. 4,
4 is a front view of the starting portion, FIG. 5 is a sectional view taken along line VV of FIG. 1, FIG. 6 is a sectional view taken along line VI-VI of FIG. 1, and FIG. It is. FIG. 8 is a cross-sectional view showing an example of a deep underground structure, FIG. 9 is a diagram illustrating an example of a deep underground structure proposed by the present inventors, and FIGS. It is a figure explaining a problem at the time of carrying out by technology. 1C: Central shaft, 1P: Peripheral shaft 3: Tunnel for continuous wall work 4: Arc inclined tunnel, 4a, 4b: Guide rail (10: Start section) 11: Base frame, 12: Back truss frame 13: Start cylinder, 14: Posture correction device 15: Roller device for horizontal level adjustment 16: Reaction force plate attaching / detaching device, 17: Guide roller device 18: Reaction force plate, 19: Temporary segment [20: Thrust support section] 22: Reaction force support device, 23: gripper device 24: guide roller device, 221: reaction force support 222: telescopic jack [30: elevating unit] 32: support device, 33: gripper device 34: elevating jack, 321: reaction force support 322: Telescopic jack

 ──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 999999999 Komatsu Manufacturing Co., Ltd. 2-3-6 Akasaka, Minato-ku, Tokyo (73) Patent holder 999999999 Shimizu Construction Co., Ltd. 2-6-1 Kyobashi, Chuo-ku, Tokyo (73) Patent holder 999999999 Taisei Corporation 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo (73) Patent holder 999999999 Central Research Institute of Electric Power Industry 1-6-1, Otemachi, Chiyoda-ku, Tokyo ( 73) Patent Holder 999999999 Fujita Co., Ltd. 4-6-115 Sendagaya, Shibuya-ku, Tokyo (72) Inventor Yasuo Mori 650 Kandamachi, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. Tsuchiura Plant (72) Inventor Yasuaki Ishikawa Hitachi Construction Machinery Co., Ltd., Tsuchiura Plant Inside the Ura Plant (72) Inventor Nobuyuki Maehara 2-6-2 Otemachi, Chiyoda-ku, Tokyo Within Hitachi Construction Machinery Co., Ltd. (72) Inventor Masaharu Noma 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Inside the company (72) Inventor Masao Matsuyama Kashima Construction Co., Ltd. 1-2-7 Moto-Akasaka, Minato-ku, Tokyo

Claims (9)

(57) [Claims] A shield excavator that is installed in an auxiliary mine substantially orthogonal to a tunnel to be built, and that sequentially builds a tunnel in a plurality of stages with a shield excavator. Starting means for starting the shield excavator from the auxiliary counter to start tunnel excavation from the auxiliary counter, and allowing the shield excavator to reach the auxiliary mine from the arrival side opposite to the start side; and A starting device for a shield excavator, comprising: a thrust support unit that receives a propulsion reaction force; and a lifting unit that raises and lowers the start reaching unit and the thrust support unit. 2. The thrust support means comprises: a pair of reaction force support members that respectively press against the entrance and exit of a tunnel constructed from the auxiliary pit and transmit a propulsion reaction force to the tunnel; 2. The starting device for a shield machine according to claim 1, further comprising a pressing means for pressing. 3. A pair of reaction force support members which are inserted into a built tunnel and are pressed against respective entrances and exits to support the lifting means, and a pressing device which presses the reaction force support members against the tunnel entrance. 3. The starting device for a shield machine according to claim 2, further comprising a supporting device comprising: a supporting device; and an elevating actuator connected to the supporting device for raising and lowering the starting and reaching device and the thrust supporting device. 4. The apparatus according to claim 3, wherein said thrust support means and lifting means each have a gripper device which presses said inner wall of said auxiliary pit in a direction orthogonal to said excavation direction and supports itself. Starter for shield machine. 5. The starting and reaching means, wherein the housed shield excavator starts in the axial direction from the start side and the shield excavator that has finished excavation arrives from the arrival side opposite to the start side. An annular sealing member which is provided on the starting side of the starting cylinder so as to be able to advance and retreat in the excavation direction, and is pressed against the inner wall of the auxiliary mine to be excavated, and which passes through the central portion of the sealing material when starting. An entrance packing that seals the gap between the excavator and the outer peripheral surface to stop water, and is provided so as to be able to advance and retreat in the direction opposite to the excavation direction on the arrival side of the starting cylinder, and is pressed against the inner wall of the auxiliary pit to be excavated An annular seal material, an exit packing that seals a gap between an outer peripheral surface of a shield machine and a water passage that advances when passing through the central portion of the seal material, and an entrance packing and an exit packing, respectively. Progress The starting device for a shield machine according to any one of claims 1 to 4, further comprising a retractable packing actuator. 6. The starting cylinder, wherein the shield excavator accommodated starts in the axial direction from the start side and the shield excavator that has finished excavation arrives from the arrival side opposite to the start side. A roller provided at a predetermined interval in a circumferential direction of the starting cylinder and rotating the contained shield machine around its axis; a roller driving actuator for driving the roller to rotate; and each of the rollers 6. The centering actuator according to any one of claims 1 to 5, further comprising: a centering actuator that advances and retreats inward in the radial direction of the starting cylinder to perform centering and holding of the shield machine. The starting device of the shield machine described. 7. The starting and reaching means includes a support frame for supporting the starting cylinder, and a posture correcting actuator for correcting the excavation posture of the shield excavator forward and downward through the support frame. The starting device for a shield machine according to claim 6, further comprising: 8. The starting and reaching means includes a detachable reaction force plate for transmitting a propulsion reaction force at the time of starting the shield machine to the thrust support means, and the reaction force plate is attached when starting to start. The shield excavator according to any one of claims 1 to 7, wherein, at the time of arrival, the reaction force plate is not removed and a passage of the shield excavator reaching from the arrival side is secured. Machine starter. 9. The apparatus according to claim 1, wherein said starting means, thrust support means, and elevating means comprise a guide roller device guided on a guide rail provided in said auxiliary pit. A launching device for a shield machine described in any of the above items.