Shield posture correction device and method

Abstract

The shield posture correcting device comprises a shield body, a floating cutterhead arranged at the advancing end of the shield body, a duct piece adjusting device arranged at the tail of the shield body, a partition plate arranged at the front end of the shield body, a round hole formed in the middle of the partition plate, a driving mounting column slidably connected with the center of the partition plate, and an annular groove formed in the outer side of the driving mounting column. At least four correcting oil cylinders are hinged to the annular array of the partition plate, and telescopic rods of the correcting oil cylinders are hinged to the driving mounting columns; the duct piece adjusting device comprises a supporting ring, the supporting ring is equally divided into a plurality of arc sections corresponding to the correcting oil cylinders, the arc sections can slide in a staggered mode, and pushing oil cylinders for correcting duct pieces are arranged on the arc sections. And when one correcting oil cylinder is adjusted, the pushing oil cylinder moves towards the floating cutter head through a connecting rod device. When the floating cutterhead floats, the auxiliary cutter ring at the front end of the shield body extrudes and cuts soil and the pushing oil cylinder pushes and assembles the correction segments to the completed segment rings, a correction gap is reserved, and correction in the shield direction is achieved jointly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel engineering and shield posture adjustment, and particularly relates to a shield posture correction device and method. BACKGROUND

[0002] In shield construction, the tunneling track of the shield machine should be consistent with the tunnel design axis as much as possible, so the shield machine needs to constantly adjust and correct its own posture. Due to the large mass components such as the cutter head and the main drive being concentrated in the front part of the shield machine, the center of gravity of the shield machine is relatively forward, which has the characteristics of heavy head and light tail. When the ground bearing capacity is good, the support force generated by the ground at the bottom of the front shield can balance the weight of the shield machine, and the shield machine can maintain a normal advancing posture. When the shield machine is tunneling in soft soil, silt and other ground, the support capacity of the ground is weak, and the support force generated by the ground may not be enough to bear the weight of the shield machine, so the shield head sinks under the action of gravity and appears to be "tilted". If the degree of "tilt" exceeds the adjustment capability of the advancing oil cylinder, the shield posture will be out of control, which will affect the quality of tunnel construction.

[0003] The patent announcement No. CN113982612B discloses a shield machine posture auxiliary adjustment device and adjustment method, which realizes auxiliary adjustment of the shield posture by applying a controllable force to the shield tail. Since the force adjustment position is at the tail of the shield machine, a very large torque needs to be applied to make the cutter head position "tilt", which is not ideal in terms of force condition, and on the other hand, the shield body at the tail of the cutter body directly rubs against the tunnel wall and is easy to deform and damage. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art, and to provide a shield posture correction device and method.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: A shield posture correction device, comprising a shield body, a floating cutter head arranged at the front end of the shield body, a segment adjustment device arranged at the tail of the shield body, a partition plate arranged at the front end of the shield body, a circular hole arranged in the middle of the partition plate, a drive mounting column slidingly connected at the center of the partition plate, an annular groove arranged outside the drive mounting column, the annular groove corresponding to the circular hole and the circular hole not being separated from the annular groove, at least four correction oil cylinders arranged in an annular array and hingedly connected to the partition plate, the extension rods of the correction oil cylinders being hingedly connected to the drive mounting column, and the at least four correction oil cylinders being linked and adjusted in floating amount of the floating cutter head through a control system. The segment adjustment device comprises a support ring, the support ring being divided into a plurality of arc segments corresponding to the correction oil cylinders, adjacent two arc segments being capable of slidingly offsetting each other, and a jacking oil cylinder for jacking the segment being arranged on the arc segment. When one of the correction oil cylinders is adjusted, the jacking oil cylinder is moved towards the floating cutter head through a connecting rod device.

[0006] Preferably, the front end of the shield is fixedly connected with a vice cutter ring.

[0007] Preferably, a wedge-shaped block is arranged on one side of the correction pipe piece, an anchoring hole is arranged on the wedge-shaped block, and a grouting anchor rod is fixedly connected in the anchoring hole.

[0008] Preferably, the partition plate is fixedly connected with a support, and the cylinder body of the correction oil cylinder is rotationally connected with the support.

[0009] Preferably, the connecting rod device comprises a side plate, the inner wall of the shield is fixedly connected with the side plate, the side plate is provided with a guide hole, a pull rod is slidingly connected in the guide hole along the axial direction of the shield, one end of the pull rod is fixedly connected with the arc segment, and the other end of the pull rod is fixedly connected with a jog plate. The telescopic rod of the correction oil cylinder penetrates through the tail cylinder body and is fixedly connected with an arc-shaped sliding block, the partition plate is provided with a first sliding groove, a guide sliding block is slidingly connected in the first sliding groove, a support rod is fixedly connected on one side of the guide sliding block, one end of the support rod is fixedly connected with an arc-shaped plate, the arc-shaped plate is provided with an arc-shaped sliding groove, the arc-shaped sliding block is slidingly connected in the arc-shaped plate, the other end of the support rod is fixedly connected with a limiting inclined plate, and the jog plate is in contact with the inclined surface of the limiting inclined plate and is limitedly sliding through a dovetail block and a dovetail groove.

[0010] The application further discloses a shield posture correction method, which adopts the correction device and performs shield posture correction through the following steps. Step one, the monitoring system monitors the direction deviation of the shield, and reasonably divides the deviation to avoid that the displacement is too large in single correction.

[0011] Step two, the corresponding correction oil cylinder is adjusted, and the remaining correction oil cylinders follow, for example, the correction oil cylinder in the two o'clock direction is retracted, the floating cutter head is pushed upward, the floating cutter head is used to guide excavation in the correction direction, and the shield can be smoothly corrected.

[0012] Meanwhile, the jacking oil cylinder of the correction pipe piece corresponding to the correction oil cylinder in the eight o'clock direction follows the floating cutter head direction, so that the jacking oil cylinder subsequently pushes the correction gap between the laid correction pipe piece and the completed pipe piece ring.

[0013] Step three, the grouting anchor rod is installed in the wedge-shaped block in the correction gap, and the tunnel bottom is grouted and reinforced.

[0014] The shield posture correction device and method have the following advantages: the floating cutter head is used as the main pushing direction in one of the correction oil cylinders, the remaining correction oil cylinders are adaptively elongated, the floating cutter head moves to the two o'clock direction, the floating cutter head floats and rises to one side, the cutting A area of the floating cutter head is subsequently cut, the subsequently formed tunnel is higher than the already formed tunnel wall B, and thus the tunnel trend is conveniently corrected. Due to the floating cutter disc floating, the formed tunnel wall B and the area A form a fault D between the area, the auxiliary cutter ring of the front end of the shield body extrudes the cut soil, cooperates with the advancement of the shield body, so that the shield body can enter the A area, thereby playing the role of correction; When the correction pipe is pushed to the completed pipe ring by the pushing oil cylinder, a correction gap is left, so that the wedge block and the grouting anchor rod are installed in the correction gap, and the tunnel bottom is grouted and reinforced, so that the problems such as subsequent tunnel subsidence are avoided, and the correction of the shield direction is realized. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the basic structure schematic diagram of the present application; Figure 2 is the internal structure schematic diagram of the shield body; Figure 3 is the internal structure schematic diagram of the shield body after removing the floating cutter disc; Figure 4 is the installation structure schematic diagram of the correction oil cylinder on the partition plate; Figure 5 is the single arc segment connection structure schematic diagram in the eight o'clock direction correction oil cylinder and the pipe piece adjusting device; Figure 6 is the correction principle schematic diagram of the present application. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0017] Example 1 As Figures 1 to 6As shown, the present application provides a kind of shield posture correction device, including shield body 1, the advancing end of shield body 1 is provided with floating cutterhead 2, the front end of shield body 1 is fixedly connected with auxiliary cutter ring 11, the tail of shield body 1 is provided with segment adjusting device 3, the front end of shield body 1 is provided with baffle 4, the middle part of baffle 4 is provided with round hole 41, baffle 4 center is slidably connected with driving mounting column 42, the outer side of driving mounting column 42 is provided with annular groove 43, annular groove 43 is correspondingly provided with round hole 41 and round hole 41 does not deviate from annular groove 43, baffle 4 is hingedly connected with at least four correction oil cylinders 5, the more the number of correction oil cylinders 5, the more refined the correction is, and the specific number is set according to the comprehensive benefit, baffle 4 is fixedly connected with support 411, the cylinder body of correction oil cylinder 5 is rotatably connected with support 411, the telescopic rod of correction oil cylinder 5 is hingedly connected with driving mounting column 42, at least four correction oil cylinders 5 are adjusted by control system linkage to adjust the floating amount of floating cutterhead 2, i.e. if correction oil cylinder 5 needs to push floating cutterhead 2 to move in two o'clock direction, since floating cutterhead 2 is in the shape of disc, the remaining correction oil cylinders 5 need to be adaptively elongated to adapt, so that floating cutterhead 2 moves in this direction, after floating cutterhead 2 floats relative to shield body 1, since driving mounting column 42 is still in the center of floating cutterhead 2, the range of subsequent cutting of floating cutterhead 2 is in Figure 6 Middle A area, relative to the already formed tunnel wall B, is in the "raise head" posture, for correcting the situation of "planting head" of shield tunneling machine; Segment adjusting device 3 includes support ring, support ring is equally divided into several arc segments 31 corresponding to correction oil cylinder 5, adjacent two arc segments 31 can slide relative to each other, arc segment 31 is provided with push oil cylinder 32 for correcting segment 10; One of correction oil cylinder 5 adjusts to make push oil cylinder 32 move to floating cutterhead 2 through connecting rod device. Correction segment 10 is provided with wedge block 20 on one side, anchor hole is provided on wedge block 20, and grouting anchor rod 30 is fixedly connected in anchor hole.

[0018] In the present application, floating cutterhead 2 moves in two o'clock direction under the action of one of correction oil cylinder 5 as main pushing direction (such as two o'clock direction, correction oil cylinder 5 in two o'clock direction is retracted, and correction oil cylinder 5 in eight o'clock direction is elongated), and the remaining correction oil cylinders 5 are adaptively elongated, so that floating cutterhead 2 moves in two o'clock direction (two o'clock and eight o'clock are directional nouns), as Figure 6 As shown, floating cutterhead 2 floats to one side, and then cutting area A of floating cutterhead 2, the tunnel formed subsequently is higher than the already formed tunnel wall B, so as to facilitate the deviation correction of tunnel alignment; Since floating cutterhead 2 floats, the fault D is formed between the tunnel wall B and area A, the auxiliary cutter ring 11 at the front end of shield body 1 extrudes the soil, and cooperates with the advance of shield body 1 to make shield body 1 enter area A, so as to play a correcting role, and shield body 1 moves to the upper side, so it is necessary to pull apart the distance between the bottom segments and set wedge block 20 for compensation; Shield deviation is caused by insufficient bearing capacity of surrounding soil. Although the tunnel direction is adjusted, the segment will continue the state of the rear segment, affecting the posture adjustment of the front segment. At this time, the correction gap is left out when the correction cylinder 32 pushes the segment 10 between the completed segment rings, so as to facilitate the setting of the wedge block 20 and the installation of the grouting anchor rod 30 and the grouting reinforcement of the tunnel bottom, avoiding the problems such as subsidence of the subsequent formed tunnel.

[0019] Embodiment 2 As shown in Figures 1 to 6 The connecting rod device includes a side plate 6, the side plate 6 is fixedly connected to the inner wall of the shield body 1, the side plate 6 is provided with a guide hole, a pull rod 61 is slidingly connected in the guide hole along the axial direction of the shield body 1, one end of the pull rod 61 is fixedly connected to the arc segment 31, and the other end of the pull rod 61 is fixedly connected to a jog plate 63. The extension rod of the correction cylinder 5 penetrates the tail cylinder body and is fixedly connected to an arc-shaped sliding block 64, the partition plate 4 is provided with a first sliding groove 65, a guide sliding block 66 is slidingly connected in the first sliding groove 65, one side of the guide sliding block 66 is fixedly connected to a support rod 67, one end of the support rod 67 is fixedly connected to an arc-shaped plate 68, the arc-shaped plate 68 is provided with an arc-shaped sliding groove, the arc-shaped plate 68 is arranged at the center of the rotation shaft of the correction cylinder 5, the arc-shaped sliding block 64 is slidingly connected in the arc-shaped plate 68 (since the cooperation of different correction cylinders 5 will cause the correction cylinder 5 to deviate from the original axis, after the correction cylinder 5 swings, the arc-shaped plate 68 and the arc-shaped sliding block 64 can still move to push or pull the support rod 67 to move), the other end of the support rod 67 is fixedly connected to a limiting inclined plate 69, the jog plate 63 is in contact with the inclined surface of the limiting inclined plate 69 and is limitedly slid through dovetail blocks 691 and dovetail grooves 692, Figure 6 In the middle (the eight o'clock direction correction cylinder 5), the support rod 67 and the limiting inclined plate 69 move upward, the pull rod 61 can only move axially and is limited by the side plate 6, the dovetail groove 692 of the limiting inclined plate 69 makes the jog plate 63 and the pull rod 61 move to the left, and the distance between the segment laid by the subsequent push cylinder 32 and the completed segment ring increases, forming a correction gap.

[0020] Firstly, the pipe segment laying mechanism composed of the arc segment 31 and the pushing oil cylinder 32 makes the pipe segments uniformly assembled and forms a pipe segment ring when the arc segment 31 is in the initial position, and when the arc segment 31 moves a distance towards the floating cutter head 2, the floating cutter head 2 floats towards the two o'clock direction, the correction oil cylinder 5 at the eight o'clock position moves upwards with the supporting rod 67 and the limiting inclined plate 69, the dovetail groove 692 of the limiting inclined plate 69 makes the misaligned sliding plate 63 and the pull rod 61 move to the left, the pull rod 61 increases the distance between the pipe segment laid subsequently by the pushing oil cylinder 32 and the pipe segment ring laid completely, forms a correction gap, and the correction gap and the arc segment 31, the pushing oil cylinder 32 and the correction oil cylinder 5 form a correlation, which facilitates the setting of the wedge-shaped block 20 in the correction gap and the installation of the grouting anchor rod 30 and the grouting reinforcement of the tunnel bottom, and avoids the problems such as the subsidence of the subsequently formed tunnel.

[0021] The application further discloses a shield posture correction method, which adopts the correction device and is performed through the following steps. Step one, the monitoring system monitors the direction deviation of the shield, and the monitoring system adopts the measuring device of the prior art, reasonably divides the measured deviation, and the floating amount of the floating cutter head 2 is preferably suitable for the smooth entering of the shield body 1 into the A area, so as to avoid the too large single correction displacement.

[0022] Step two, the corresponding correction oil cylinder 5 is adjusted, and the remaining correction oil cylinders 5 follow, for example, the contraction of the correction oil cylinder 5 at the two o'clock direction pushes the floating cutter head 2 upwards, and the floating cutter head 2 is guided to dig in the correction direction, so that the shield body 1 can be smoothly corrected.

[0023] Meanwhile, the pushing oil cylinder 32 of the correction pipe segment 10 corresponding to the correction oil cylinder 5 at the eight o'clock direction follows the floating cutter head 2, so that the pushing oil cylinder 32 subsequently pushes the correction pipe segment 10 laid subsequently and the pipe segment ring completed to form a correction gap.

[0024] Step three, the grouting anchor rod 30 is installed in the wedge-shaped block 20 in the correction gap and the tunnel bottom is grouted and reinforced.

[0025] Although the embodiments of the application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A device for correcting the posture of a shield, comprising a shield body (1), characterized in that: The front end of the shield body (1) is provided with a floating cutter head (2), the tail of the shield body (1) is provided with a segment adjusting device (3), the front end of the shield body (1) is provided with a partition plate (4), the middle of the partition plate (4) is provided with a circular hole (41), the center of the partition plate (4) is slidably connected with a driving mounting column (42), the outer side of the driving mounting column (42) is provided with an annular groove (43), the annular groove (43) is correspondingly provided with the circular hole (41) and the circular hole (41) does not deviate from the annular groove (43), the partition plate (4) is hingedly connected with at least four correction oil cylinders (5) in an annular array, the telescopic rod of the correction oil cylinder (5) is hingedly connected with the driving mounting column (42), and the at least four correction oil cylinders (5) are linked and adjusted by a control system to adjust the floating amount of the floating cutter head (2). The segment adjusting device (3) comprises a support ring, the support ring is equally divided into a plurality of arc segments (31) corresponding to the correction oil cylinders (5), adjacent two arc segments (31) can slide relative to each other, and the arc segment (31) is provided with a pushing oil cylinder (32) for correcting the segment (10). When one of the correction oil cylinders (5) is adjusted, the pushing oil cylinder (32) is moved towards the floating cutter head (2) through a connecting rod device.

2. The posture correction device of claim 1, wherein: The front end of the shield body (1) is fixedly connected with a secondary cutter ring (11).

3. The posture correction device of claim 1, wherein: One side of the correction segment (10) is provided with a wedge block (20), an anchor hole is formed in the wedge block (20), and a grouting anchor rod (30) is fixedly connected in the anchor hole.

4. The posture correction device of claim 1, wherein: The partition plate (4) is fixedly connected with a support (411), and the cylinder body of the correction oil cylinder (5) is rotatably connected with the support (411).

5. The device for correcting the posture of a shield tunneling machine according to claim 1, characterized in that: The connecting rod device comprises a side plate (6), the inner wall of the shield body (1) is fixedly connected with the side plate (6), the side plate (6) is provided with a guide hole, the guide hole is slidably connected with a pull rod (61) along the axial direction of the shield body (1), one end of the pull rod (61) is fixedly connected with the arc segment (31), and the other end of the pull rod (61) is fixedly connected with a dislocation sliding plate (63). The telescopic rod of the correction oil cylinder (5) penetrates through the tail cylinder body and is fixedly connected with an arc-shaped sliding block (64), the partition plate (4) is provided with a first sliding groove (65), the first sliding groove (65) is slidably connected with a guide sliding block (66), one side of the guide sliding block (66) is fixedly connected with a support rod (67), one end of the support rod (67) is fixedly connected with an arc-shaped plate (68), the arc-shaped plate (68) is provided with an arc-shaped sliding groove, the arc-shaped sliding block (64) is slidably connected in the arc-shaped plate (68), the other end of the support rod (67) is fixedly connected with a limiting inclined plate (69), the dislocation sliding plate (63) is in contact with the inclined surface of the limiting inclined plate (69) and is limitedly slid through dovetail blocks (691) and dovetail grooves (692).

6. A method of correcting a posture of a shield, characterized by: The correction device of any one of claims 1 to 5 is adopted, and the shield posture correction is performed through the following steps. Step one, the monitoring system monitors the direction deviation of the shield, reasonably divides the deviation, and avoids that the single correction displacement is too large. Step two, adjust the corresponding correction oil cylinder (5), and the remaining correction oil cylinders (5) follow, for example, the two o'clock direction correction oil cylinder (5) is retracted, the floating cutter head (2) is pushed upwards, the floating cutter head (2) is first guided to dig in the correction direction, so that the shield body (1) can be smoothly corrected. At the same time, the eight o'clock direction correction oil cylinder (5) corresponding to the push oil cylinder (32) of the correction pipe piece (10) follows the floating cutter head (2) direction, so that the push oil cylinder (32) pushes the laid correction pipe piece (10) and the completed pipe piece ring to form a correction gap. Step three, install the grouting anchor rod (30) in the wedge block (20) in the correction gap and grout the bottom of the tunnel.

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