JPH04153498A - Self-traveling of shield excavator and erector - Google Patents

Abstract

PURPOSE:To concurrently perform excavation and segment assembling by a method in which holders to be fixed or released freely are set behind an erector, and a mover to move the holders relatively in the axial direction of tunnel is provided. CONSTITUTION:An excavator is set behind a shield machine 1, and two or more holders 7 to hold an erector 6 are set to make the self-traveling of the erector 6 possible. A pressing mechanism to press segments 4 and 5 vertically and bilaterally is provided to a frame 20 through which a slide rod 18 is thrust. Slide jacks 25 and 26 are provided to the holders 7 to make the axial movement of them possible, and two segment holders consisting of an arm 10, a vertically movable jack 11, a vertically movable beam 12, and a slide jack 14 are provided to the erector 6. Excavation and segment assembling work can thus be attained in parallel.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shield excavator equipped with a self-propelled erector and a self-propelled method for the erector.

[Prior Art] The erector of a shield tunneling machine is usually integrally attached to the main body of the seal 1. For this reason, it is not possible to excavate while the segments are being assembled by the erector, and it is not possible to assemble the excavation r1, i-1, or knont.

Therefore, in order to speed up the construction process by allowing excavation and segment assembly to be carried out in parallel, the inner surface of the existing Cefnon I was pressed to hold the existing segment in a perfect circle behind the shield body. It was proposed to provide a perfect circle holding device and to attach a cefmen l-silk stand device (erecta) to this perfect circle holding device (Japanese Patent Application Laid-open No. 32100/1983).

[Problem to be solved by the invention 1 However, as stated in the above proposal,
The general concept of a segment perfect circle holding device is that it is a device that holds the segment ring, which tends to deform into a horizontally long shape due to the weight of the segment itself and the force of the earth, in a perfect circle by pushing it downwards. It is supported so that it can reciprocate via wheels on a deck extending rearward from the main body.

When an erector is installed in such a perfect circle holding device, the following problems occur.

(1) Since the deck that supports the perfect circle holding device is fixed to the shield body, a deviation may occur between the center line of the shield body and the center line of the existing segment when constructing the kerf or correcting the shield direction. Mutual interference between the deck and wheels may occur. A normal roundness holding device can be used by releasing the pressure on the inner surface of the segment during excavation and pushing against the inner surface of the segment only when assembling segment 1. In addition, even if the inner surface of the segment is pressed while digging, if the deviation of the rain center line becomes large as described above, it is possible to immediately release the pressure of the perfect circle holding device and re-cover the de-so. 1- It is possible to avoid hand-wringing between the wheels and wheels, but if the erector is attached to a perfect-circle holding device, when the pressure on the perfect-circle holding device is released or the re-upholstery is performed, the assembly reaction force of the erecta will be reduced during that time. Since the segment assembly work cannot be applied to the existing Cefnon 1 and the segment assembly work is stopped, the original objective of speeding up the work from 1 to 3 cannot be achieved.

(2) Even during normal excavation, in the event that shield screws, pitching, or yawing occur, the roundness guard presses against the inner surface of the segment in order to align the center of rotation of the L/lid with the center of the existing segment. 1! When pressing the I device, the stroke of the jack must be adjusted individually, and the jack operation is critical.

(3) During segment assembly, assembly reaction forces act on the erector in all directions. Ordinary roundness holding devices are used in the horizontal direction (
Since there is no reaction force receiver in the lateral direction, it is difficult to obtain a large extrusion force, especially when assembling horizontal segments, which limits the erector's ability.

The first purpose was to remove the segment silk 1 in parallel with the excavation, which would be affected by the relative posture of the shield body and Cefnon I. A self-propelled erector that comes with ``1'' (iii) seal:
Our goal is to provide excavators. A second object is to provide a shield excavator equipped with a self-propelled erector that can sufficiently resist segment assembly reaction forces in all directions. A third object is to provide an erector self-propelling method that allows the erector self-propelling operation to be performed in parallel with segment assembly.

[Failure to solve the problem]

- In order to achieve the first object of item F, the invention according to claim 1 is capable of freely fixing and releasing itself by pressing the inner surface of the existing segment behind the segment assembly erector and releasing the pressure. comprising two or more retainers capable of moving the erector, and having the erector held by the two or more retainers with a sliding rod portion extending in the tunnel axis direction;
However, a means for relatively moving each retainer in the direction of the tunnel axis is provided so that the erector can move completely independently from the shield body.

- In order to achieve the object of item 2, the invention of claim 2 is such that each retainer is provided with a hygment pressing mechanism that presses the inner surface of the existing segment in the vertical and horizontal directions, and for the same purpose. The invention according to claim 3 has three cages of 6 tN, and any two cages can hold the erector (
, come down, 1. It's sea urchin.

Further”--Claim 71H to achieve the object of statement 3
11.1 Link Segment &J
[1'/After completion of the process, release the cage closest to the erector from the existing safety men 1, release it from the erector, and hold it again.
(:: Move forward by taking the reaction force against the retainer fixed to the existing segment. After moving forward by -υ and I link i? +, re-release the released retainer.) The next safety men l-&rl ke work is started using the erector, and while the segment assembly is being carried out, the cage that has not yet moved forward is released from the existing safety men 1 and moved forward. It allows the Erecta to run on its own.

1 Effect] Since the erector is held by the retainer of two plates 1 fixed to the inner surface of the safety men 1 at the sliding joint extending in the tunnel axis direction, the erector is This assembly reaction force is transmitted to the existing safety member I through the sliding rod portion and the retainer. After one ring of segment assembly is completed, each retainer is released from the existing segment in turn and moved forward along the sliding rod section, allowing the erector to move completely independently from the shield body. can be done. Therefore, the segments can be assembled in parallel with excavation, and even if the relative attitude of the shield body and the existing safety mener 1 changes, the erector and retainer are not affected at all.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

In Figures 1 to 3, l is a cylindrical shield main body, and cutter head 2 (fourth
The ground was excavated using the shield shank 3 installed inside the existing safety men l-4, 5.
It is propelled by taking the reaction force.

At the rear of the shield body 1, an erector 6 for assembling the safety men I and a holder 7 for holding the erector 6 are installed.

The erector 6 consists of one link-like flake l-81 core 2.
It consists of a double erector equipped with two segment gripping devices 9a and 9b, each gripping device having an arm 1.
0, W falling shirt=1=] 1. Mainly composed of a lifting beam 12, a slider 13, and a sliding jack 14.

The arm 10 is slidably mounted along its sliding guide portion 16.The arm 10 is equipped with two swing motors 15, and the motor A pinion (not shown) mounted on the shaft engages with the fixed gear 17 on the gripper 1-8, and the gripping device 9
Rotate a and 9b. Elevating beam 1 with elevating jack moon
By sliding the slider 13 back and forth using the sliding jack 14, the segment 4a to be newly assembled is gripped by U7, rotated, and assembled into a predetermined position in the same way as a normal erector. . However, since this embodiment is equipped with two gripping devices, segment assembly work can be continued even if one of the gripping devices breaks down, and the second gripping device is equipped with two gripping devices.
The safety men I can be assembled at the same time using the gripping device on the stand.

The bracket 8 is composed of a sliding guide section 16, a fixed gear section 17, and a sliding rod section 18. Bracket 8
2 wooden sliding rod parts 18 extending from 1 to 2 in the axial direction of the tunnel.
The erector 6 is held in the retainer 7 by this sliding rod portion 18.

For example, three cages are installed in this case.

Each cage (first cage 78, second cage 7b,
The third retainer 7c) has the same structure and is made up of rectangular cylindrical members in four digits, and is mounted on a frame 20 provided with a guide block I9 through which the sliding rod part 18 passes on the left and right. Equipped with a directional segment pressing mechanism. The segment pressing mechanism includes arc-shaped pressing feet 2122 arranged on the top and bottom, left and right sides of the frame 20, and each pressing mechanism includes a pressing jack 23, 24 provided between the foot and the frame 20. 23.
24, the pressing is carried out by pressing the inner surface of the existing segment 45 with the foot 21.22 to release the respective cage 7.
By fixing and retracting the pressing jacks 23, 24, it is possible to release the pressing by the pusher 1 lift 21, 22 during segment assembly and release the respective retainers 1 and 7.

In this embodiment, the first retainer 7a1 is the sliding opening.

The second retainer 7b and the third retainer 7c are movable relative to the sliding Ron I section 18 by retracting the respective pusher sinks 2324. It becomes a state. First retainer7. , between I and the second retainer 7b and between the second retainer 7b and the third retainer 7c,
Sliding jacks 25, 26 are provided as means for moving the respective retainers relative to each other in the direction of the tunnel.

The reaction force exerted on the erector during segment assembly is applied to the slider 13, lifting beam 12, arm 1o, bracket 8, sliding front part 18, retainer 7, and the retainer 7 is pushed through the existing tool 1-2L22. It is communicated to segment 145. In this case, by placing the pressing tools 1-21 and 22 on the -1-bottom, left and right sides, it is possible to hold the segments in any direction.

In this embodiment, the segment I/assembly reaction force applied to the erector 6 can be borne by any two cages. 1st
In the figure, the interval between the second retainer 7b and the third retainer 7c is made wider than the interval between the first retainer 7a and the second retainer 7b in the first and second retainers 7a and 7b. Compared to the case where the erector 6 is held, the second and third cages 1b, 1c.
This is because the moment 1-reaction force applied to the retainer is larger when the erector 6 is held at the retainer.

Each retainer 7 is pressed vertically and horizontally by a jack 2.
3. By adjusting the stroke of 24, it can also be used as a segment perfect circle holding device.

The erector operating sequence is shown in FIGS. 4 to 9.

Figure 4 shows the normal segment assembly state, with the first
The segments 4 are assembled while holding the erector 6 with the holder 7a, the second holder 7b, and the third holder 7c.

In this example, key segment l-5 is a horizontal taper (J key segment) inserted in the tunnel axis direction, so
-1-- When assembling the segment 5, as shown in FIG. 24
is retracted to release the pounding pressure during segment assembly, and the first retainer 7a is pushed out together with the erector 6 by the sliding seat tongue 25 using the second retainer 7b as a reaction force receiver, and moved forward.
Let's go. After the key segment 5 is gripped by the erector 6 at the end of the stroke, as shown in FIG.
7a is pulled back together with the erector 6 by the sliding jack 25, and the key segment 5 is inserted between the segments 1-4 where Mi is erected. In this embodiment, the first retainer Ag1a is slid together with the erector 6 to pick up the segment 5, but there is also a sliding jack between the erector 6 and the first retainer 7a. It is also possible to remove and insert the key segment 5 by sliding only the erector 6.

After completing the assembly of the segments of one ring in this way, as shown in FIG. Pushed out by the dynamic jack 25,
■ Move the ring forward. During this time, the second retainer 7b and the third
The erector 6 is held by the retainer 7c.

The advanced first retainer 7a is attached to the existing segment 4.

5 and start the next segment assembly work. While assembling the segments, as shown in FIG. 8, the second retainer 7b is released, the third retainer 7c is used as a reaction force receiver, and the sliding jack 26 pushes out the second retainer 7b. Move forward one ring. During this time, the erector 6 is held by the first holder 7a and the third holder 7c.

Similarly, during segment assembly, as shown in FIG.
Move the ring forward. During this time, the erector 6 is held in the first position.
This is done using the retainer 7a and the second retainer 7b. 1st, 2nd, 3rd
retainer 7a.

When both 7b and 7c move forward, the normal state shown in FIG. 4 is reached, and assembly of the segments continues in this state.

As can be seen from FIGS. 4 to 9, the erector 6 and retainer 7 are completely independent from the shield main body 1, so that the shield excavator 1 and 1ζ It is possible to assemble the safety member 1 without being influenced by the relative posture of the existing safety member 145 and the existing safety member 145. However, as with the case where an erector is installed in a normal roundness holding device, it is difficult to release the pressure on the roundness holding device when constructing curves or correcting the direction of sealing, or to change the seal. It also prevents shield rolling, pitching, and assembly work from stopping.
There is no need to adjust the perfect circle holding device in response to the yaw ink (=1+J).Furthermore, in this embodiment, when the erector is free-running, the second and third retainers 7
Since the forward movement of b and 7c is carried out in parallel with the assembly of the safety men I., it is possible to speed up the -. layers of l.

In the embodiment described above, three retainers are provided, but if retainer 2:; is to be moved when segments are not being assembled, two retainers may be used. Moreover, the erector may be a normal one having only one safety men I/gripping device.

〔Effect of the invention] According to the present invention, the following effects can be obtained.

(i) Since the erector is designed to run completely independently from the shield body, even if there is a misalignment between the shield body and the existing segment, such as when constructing a curve or modifying the shield direction, Segment assembly can be carried out in parallel with excavation without being affected by this, making it possible to speed up the tunneling process.

(11) By providing segment pressing mechanisms in the vertical and horizontal directions on the cage, it is possible to receive segment assembly reaction forces in all directions, and with three cages, it is possible to use any two cages. By being able to hold the erector, the erector can be held stably even when the holder at the - section is released from the existing segment and moved during segment assembly.

(iii) As for the erector self-propelling method, the holder closest to the erector is released and moved forward by one link along with the erector, and the holder that has been moved forward is fixed again to the existing safety member I, and then the next segment assembly work is started. By starting the segment assembly and releasing the retainer that has not yet advanced during the segment assembly to allow it to advance, the waiting time for the segment assembly operation can be reduced and the tunneling process can be completed more quickly. .

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a shield tunneling machine equipped with a self-propelled erector according to the present invention, FIG. 2 is a view taken along the ΔA arrow in FIG. 1, and FIG.
The figure is a view taken along the line B--B in FIG. 1, and FIGS. 4 to 9 are diagrams showing the operation FJ+ state of the erector. ■...Shield body, 4.5...Existing safety men 1-
36... Erecta, ■... Retainer, 18... Kei I
J+ Seat part, 2L 22...Pushing foot, 23.24...Pushing +) Seat attachment, 25, 26.
...Sliding jack. J

Claims (1)

[Scope of Claims] 1. Two or more retainers located behind the segment assembly erector that can freely fix and release themselves by pressing the inner surface of the existing segment and releasing the pressure. and holding the erector in the two or more retainers by a sliding rod portion extending in the tunnel axis direction,
A shield excavator characterized in that a means for relatively moving each retainer in the tunnel axis direction is provided so that the erecta can run completely independently from the shield main body. 2. The shield excavator according to claim 1, wherein each retainer has a segment pressing mechanism that presses the inner surface of the existing segment in the vertical and horizontal directions. 3. The shield excavator according to claim 1, wherein the shield excavator is provided with three retainers, and the erecta can be held by any two retainers. 4. After completing the assembly of the 1st ring segment, proceed as follows (
The erector self-propelling method for a shield excavator according to any one of claims 1 to 3, characterized in that the erector is self-propelled in the order of a) to (e). (a) Release the cage closest to the erector from the existing segment. (b) The erector and the released cage are moved forward by taking a reaction force from the cage fixed to the existing segment. (c) After advancing by one ring, the once released retainer is fixed to the existing segment again. (d) Then, the next segment assembly operation is started by the erector. (e) While the segments are being assembled by the erector, the retainers that have not yet been advanced are released from the existing segments and are advanced.