Tunnel segment reinforcing device

Abstract

A tunnel segment reinforcing device comprises a reinforcing box, a locking executing mechanism, a grouting pipe and a grouting valve mechanism. A reinforcing groove is formed in the joint face of the tunnel segment, and the reinforcing box is matched with the reinforcing groove in a penetrating mode. The locking execution mechanism is arranged in the reinforcing box; the grouting pipe is matched with the locking executing mechanism in a penetrating manner; the grouting valve mechanism is arranged at the axial end of the reinforcing box and used in cooperation with the grouting pipe. The reinforcing box adopts a rectangular structure; when two adjacent tunnel segments are jointed together, the two reinforcing grooves are buckled to form a rectangular groove hole, and the rectangular groove hole is in clearance fit with the reinforcing box; the locking executing mechanism comprises a rotary knob, a hollow lead screw, a nut sliding block, a clamping block, a first clamping block, a second clamping block, a first connecting rod and a second connecting rod. According to the scheme, the tunnel segment reinforcing device can effectively enhance the connection strength between tunnel segments, is matched with a grouting reinforcing mode, can effectively enhance the overall stability of the tunnel segments, and meanwhile has the advantages of being efficient in operation, stable in structure and convenient and fast to operate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to tunnel segment reinforcing technical field, especially a kind of tunnel segment reinforcing device. BACKGROUND

[0002] Tunnel segment, as the core assembly component of shield construction, is the key inner barrier to ensure the stability and safety of tunnel structure. Tunnel segment is usually made of high-strength impermeable concrete, which has certain initial strength and stability.

[0003] In the construction of subway tunnels in urban areas, due to the dense surrounding buildings and underground pipelines, tunnel segments not only have to bear normal ground pressure, but also have to cope with additional stress caused by factors such as building foundation settlement and underground water level fluctuation. Therefore, in order to enhance the carrying capacity of tunnel segments and reduce the risk of leakage, it is particularly important to effectively reinforce tunnel segments to ensure the long-term safe operation of subway tunnels.

[0004] In large underwater tunnel projects across rivers and seas, tunnel segments face huge water pressure and complex geological conditions, including soft soil layers, rock faults and strong water flow erosion on the seabed. Therefore, in order to enhance the support force of tunnel segments, grouting reinforcement is usually used to improve the performance of rock-soil mass by injecting grout into the rock-soil mass around the tunnel segment. However, before grouting, additional support operations must be performed on the tunnel segment, which is not only complicated, but also the connection between tunnel segments is not effectively strengthened during construction, resulting in suboptimal overall stability of the tunnel segment after support operation.

[0005] In addition, in the turning section or interface part of the subway tunnel, due to the insufficient connection between tunnel segments, local deformation and leakage phenomena are likely to occur during long-term operation, thereby posing a serious threat to the safety and service life of the subway tunnel.

[0006] Furthermore, in mountainous railway tunnel construction, railway tunnels usually need to pass through complex and variable geological conditions, such as from hard rock layers to broken weathered rock zones, so tunnel segments need to adapt to different rock properties and geostress environments. However, existing tunnel segment reinforcement methods have already been difficult to meet the increasingly stringent requirements, and once tunnel segments are damaged at the connection, it will seriously affect the integrity and stability of the railway tunnel.

[0007] Therefore, due to the many problems existing tunnel segment reinforcement methods face when facing the complex demands of different application scenarios, there is an urgent need for a high-efficiency, structurally stable and easy-to-operate reinforcement device to improve the performance of tunnel segments. SUMMARY

[0008] The tunnel segment reinforcing device can effectively strengthen the connecting strength between tunnel segments, can effectively enhance the overall stability of the tunnel segment in cooperation with the grouting reinforcing mode, and simultaneously has the characteristics of high work efficiency, stable structure and convenient operation.

[0009] In order to achieve the above object, the utility model discloses the following technical scheme: a tunnel segment reinforcing device, including reinforcing box, locking executive mechanism, grouting pipe and grouting valve mechanism, the joint surface of tunnel segment is provided with reinforcing groove, reinforcing box and reinforcing groove wear and tear cooperation, locking executive mechanism sets up in reinforcing box interior, grouting pipe and locking executive mechanism wear and tear cooperation, grouting valve mechanism sets up at the axial end of reinforcing box, and grouting valve mechanism is used with grouting pipe.

[0010] The reinforcing box adopts a rectangular structure, when two adjacent tunnel segments are joined together, two reinforcing grooves are buckled to form a rectangular slot hole, and the rectangular slot hole is gap fitted with the reinforcing box.

[0011] The locking executive mechanism includes a knob, a hollow screw, a nut block, a clamping block, a first clamping block, a second clamping block, a first connecting rod and a second connecting rod. The hollow screw is located inside the reinforcing box and coaxially distributed with the reinforcing box. One end of the hollow screw passes through the axial end of the reinforcing box, the knob is coaxially fixedly installed on the passing end of the hollow screw, and a friction-reducing bearing is arranged between the hollow screw and the through hole on the reinforcing box. The other end of the hollow screw is provided with an adapter plate, the adapter plate is fixedly connected with the reinforcing box, a friction-reducing bearing is arranged between the hollow screw and the adapter plate, and the hollow screw has only rotational freedom relative to the reinforcing box and the adapter plate. The central nut sleeve of the nut block is sleeved on the hollow screw. One end of the first connecting rod is hingedly connected to the outer block of the nut block, and the other end of the first connecting rod is hingedly connected to the first clamping block. One end of the second connecting rod is hingedly connected to the outer block of the nut block, and the other end of the second connecting rod is hingedly connected to the second clamping block. The clamping block is provided with a threaded hole in the center, and the clamping block is sleeved on the hollow screw through the threaded hole.

[0012] The central hole of the hollow screw serves as a through hole of the grouting pipe, and the outlet side pipe of the grouting pipe adopts a tapered structure.

[0013] The first connecting rod and the second connecting rod are distributed in left-right mirror symmetry relative to the hollow screw. The first clamping block and the second clamping block are distributed in left-right mirror symmetry relative to the hollow screw.

[0014] A clamping block guide slot hole is formed in the box body of the reinforcing box, the clamping block is located in the clamping block guide slot hole and extends out of the reinforcing box, the clamping block has only linear movement freedom relative to the clamping block guide slot hole, and the movement direction of the clamping block is consistent with the axial direction of the hollow screw.

[0015] The box body of the reinforcing box is provided with a clamping block guide slot hole, the first clamping block and the second clamping block are located in the clamping block guide slot hole, the first clamping block and the second clamping block only have a straight line moving degree relative to the clamping block guide slot hole, the moving directions of the first clamping block and the second clamping block are always opposite, and the moving directions of the first clamping block and the second clamping block are perpendicular to the axis direction of the hollow screw rod.

[0016] When the first clamping block and the second clamping block are at the inner limit point of the moving stroke, the first clamping block and the second clamping block are completely located in the reinforcing box; when the first clamping block and the second clamping block are at the outer limit point of the moving stroke, the first clamping block and the second clamping block are extended to the outside of the reinforcing box.

[0017] When the reinforcing box is sleeved in the rectangular slot hole formed by the joint of the two adjacent tunnel segments and the joint of the two reinforcing grooves, the knob and the clamping block are located outside the concave side of the tunnel segment, and the first clamping block, the second clamping block and the grouting valve mechanism are located outside the convex side of the tunnel segment.

[0018] The grouting valve mechanism comprises a valve baffle, a first valve plate, a second valve plate, a first reset spring and a second reset spring; the valve baffle is fixedly installed on the box body of the reinforcing box, and a valve plate installation cavity is formed between the valve baffle and the box body of the reinforcing box; the first valve plate and the second valve plate are arranged in the valve plate installation cavity, and the first valve plate and the second valve plate are distributed in left-right mirror symmetry relative to the hollow screw rod; the abutting surfaces of the first valve plate and the second valve plate are all in a slope structure; the first reset spring is located in the valve plate installation cavity and is connected between the back surface of the first valve plate and the valve baffle; the second reset spring is located in the valve plate installation cavity and is connected between the back surface of the second valve plate and the valve baffle; an outer grouting pipe perforation is arranged at the center of the valve baffle, and an inner grouting pipe perforation is arranged on the box body of the reinforcing box; the hollow screw rod, the outer grouting pipe perforation and the inner grouting pipe perforation are coaxially distributed.

[0019] The tunnel segment reinforcing device has the advantages that the connection strength between the tunnel segments can be effectively strengthened, the overall stability of the tunnel segments can be effectively enhanced in cooperation with the grouting reinforcing mode, and the device has the characteristics of high efficiency, stable structure and convenient operation.

[0020] The tunnel segment reinforcing device can effectively strengthen the connection strength between the tunnel segments, cooperate with the grouting reinforcing mode, effectively enhance the overall stability of the tunnel segments, and has the characteristics of high efficiency, stable structure and convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is a structural schematic view (view angle one) of a tunnel segment reinforcing device (initial state) of the utility model;

[0022] Fig. 2A kind of tunnel segment reinforcing device (clamping state) structural schematic view (view angle two) of the utility model;

[0023] Fig. 3 A kind of tunnel segment reinforcing device (initial state) overall sectional view structural schematic view (view angle three) of the utility model;

[0024] Fig. 4 A kind of tunnel segment reinforcing device (initial state) partial sectional view structural schematic view (view angle four) of the utility model;

[0025] Fig. 5 A kind of tunnel segment reinforcing device and the assembly effect schematic view of tunnel segment of the utility model;

[0026] In the drawing, 1-reinforcing box, 2-grouting pipe, 3-tunnel segment, 4-reinforcing groove, 5-knob, 6-hollow screw, 7-screw nut sliding block, 8-clamping block, 9-first clamping block, 10-second clamping block, 11-first connecting rod, 12-second connecting rod, 13

[0027] -adaptor plate, 14-clamping block guide slot hole, 15-clamping block guide slot hole, 16-valve baffle, 17-first valve piece, 18-second valve piece, 19-first return spring, 20-second return spring, 21-outer grouting pipe perforation, 22-inner grouting pipe perforation. DETAILED DESCRIPTION

[0028] The utility model will be further explained in detail in combination with the drawings and specific embodiment.

[0029] As Figs. 1-5 shown, a kind of tunnel segment reinforcing device, including reinforcing box 1, locking execution mechanism, grouting pipe 2 and grouting valve mechanism;Reinforcing groove 4 is provided on the joint surface of tunnel segment 3, the reinforcing box 1 is matched with reinforcing groove 4 and is worn;The locking execution mechanism is arranged in reinforcing box 1 interior;The grouting pipe 2 is matched with locking execution mechanism and is worn;The grouting valve mechanism is arranged in the axial end of reinforcing box 1, and grouting valve mechanism is used in conjunction with grouting pipe 2.

[0030] The reinforcing box 1 adopts rectangle structure;When two adjacent pieces of tunnel segment 3 are joined together, two reinforcing grooves 4 are buckled to form rectangular slot hole, and rectangular slot hole is matched with reinforcing box 1 using gap.

[0031] The locking actuator comprises a knob 5, a hollow screw rod 6, a nut block 7, a clamping block 8, a first clamping block 9, a second clamping block 10, a first connecting rod 11 and a second connecting rod 12; the hollow screw rod 6 is located inside the reinforcing box 1 and coaxially distributed with the reinforcing box 1; one end of the hollow screw rod 6 is out of the axial end of the reinforcing box 1, the knob 5 is coaxially fixedly installed on the out end of the hollow screw rod 6, and an antifriction bearing is arranged between the hollow screw rod 6 and the perforation on the reinforcing box 1; the other end of the hollow screw rod 6 is provided with an adapter plate 13, the adapter plate 13 is fixedly connected with the reinforcing box 1, an antifriction bearing is arranged between the hollow screw rod 6 and the adapter plate 13, and the hollow screw rod 6 has only a rotary degree of freedom relative to the reinforcing box 1 and the adapter plate 13; the central nut sleeve of the nut block 7 is sleeved on the hollow screw rod 6; one end of the first connecting rod 11 is hingedly connected to the outer block of the nut block 7, and the other end of the first connecting rod 11 is hingedly connected to the first clamping block 9; one end of the second connecting rod 12 is hingedly connected to the outer block of the nut block 7, and the other end of the second connecting rod 12 is hingedly connected to the second clamping block 10; the clamping block 8 is sleeved on the hollow screw rod 6 through the threaded hole in the center of the clamping block 8.

[0032] The central hole of the hollow screw rod 6 serves as a through hole of the grouting pipe 2, and the outlet side of the grouting pipe 2 adopts a tapered structure.

[0033] The first connecting rod 11 and the second connecting rod 12 are mirror-symmetrically distributed relative to the hollow screw rod 6; the first clamping block 9 and the second clamping block 10 are mirror-symmetrically distributed relative to the hollow screw rod 6.

[0034] A clamping block guide slot hole 14 is formed on the box body of the reinforcing box 1, the clamping block 8 is located in the clamping block guide slot hole 14 and extends out of the reinforcing box 1, the clamping block 8 has only a linear movement degree of freedom relative to the clamping block guide slot hole 14, and the movement direction of the clamping block 8 is consistent with the axial direction of the hollow screw rod 6.

[0035] A clamping block guide slot hole 15 is formed on the box body of the reinforcing box 1, the first clamping block 9 and the second clamping block 10 are located in the clamping block guide slot hole 15, the first clamping block 9 and the second clamping block 10 have only a linear movement degree of freedom relative to the clamping block guide slot hole 15, the movement direction of the first clamping block 9 is always opposite to that of the second clamping block 10, and the movement direction of the first clamping block 9 and the second clamping block 10 is perpendicular to the axial direction of the hollow screw rod 6.

[0036] When the first clamping block 9 and the second clamping block 10 are at the inner limit point of the movement stroke, the first clamping block 9 and the second clamping block 10 are completely located inside the reinforcing box 1; when the first clamping block 9 and the second clamping block 10 are at the outer limit point of the movement stroke, the first clamping block 9 and the second clamping block 10 extend out of the reinforcing box 1.

[0037] When the reinforcing box 1 is sleeved in the rectangular slot formed by the buckling of two adjacent tunnel segments 3 by two reinforcing grooves 4, the knob 5 and the clamping block 8 are located outside the concave side of the tunnel segment 3, and the first clamping block 9, the second clamping block 10 and the grouting valve mechanism are located outside the convex side of the tunnel segment 3.

[0038] The grouting valve mechanism comprises a valve baffle 16, a first valve plate 17, a second valve plate 18, a first reset spring 19 and a second reset spring 20; the valve baffle 16 is fixedly installed on the box body of the reinforcing box 1, and a valve plate installation cavity is formed between the valve baffle 16 and the box body of the reinforcing box 1; the first valve plate 17 and the second valve plate 18 are arranged in the valve plate installation cavity, and the first valve plate 17 and the second valve plate 18 are distributed in mirror image symmetry with respect to the hollow lead screw 6; the abutting surfaces of the first valve plate 17 and the second valve plate 18 are both in a slope structure; the first reset spring 19 is located in the valve plate installation cavity and connected between the back surface of the first valve plate 17 and the valve baffle 16; the second reset spring 20 is located in the valve plate installation cavity and connected between the back surface of the second valve plate 18 and the valve baffle 16; an outer grouting pipe perforation 21 is arranged at the center of the valve baffle 16, and an inner grouting pipe perforation 22 is arranged on the box body of the reinforcing box 1; the hollow lead screw 6, the outer grouting pipe perforation 21 and the inner grouting pipe perforation 22 are coaxially distributed.

[0039] The use process of the utility model will be described below in combination with the drawings:

[0040] When the tunnel segment 3 is assembled, a rectangular slot formed by the buckling of two reinforcing grooves 4 is formed at the joint surface of two adjacent tunnel segments 3, then the grouting valve mechanism is directed towards the rectangular slot, and the utility model is inserted into the rectangular slot as a whole, and the rectangular slot is filled and blocked by the reinforcing box 1.

[0041] When the utility model is inserted and assembled in the rectangular slot, the knob 5 is rotated to drive the hollow lead screw 6 to rotate, and at this time, the rotary motion of the hollow lead screw 6 is converted into the linear motion of the clamping block 8 and the nut block 7 at the same time.

[0042] With the rotation of the hollow screw 6, the clamping block 8 gradually approaches the inner concave side surface of the tunnel segment 3 along the clamping block guide slot hole 14, while the nut slider 7 gradually moves towards the outer convex side of the tunnel segment 3. During the movement of the nut slider 7, the first clamping block 9 and the second clamping block 10 are driven by the first connecting rod 11 and the second connecting rod 12 respectively to move away from each other along the clamping block guide slot hole 15, so that the first clamping block 9 and the second clamping block 10 extend out of the clamping block guide slot hole 15. In this process, the distance between the clamping block 8 and the first clamping block 9 and the second clamping block 10 gradually decreases, until the tunnel segment 3 is completely clamped between the clamping block 8 and the first clamping block 9 and the second clamping block 10. At this time, the reinforcement work of the tunnel segment 3 at the connection is completed.

[0043] Subsequently, the grouting pipe 2 is inserted into the center hole of the hollow screw 6 from the inner concave side of the tunnel segment 3. With the insertion of the grouting pipe 2, the grouting pipe 2 first penetrates the hollow screw 6, then penetrates the inner grouting pipe perforation 22 and abuts against the abutting slope surface of the first valve plate 17 and the second valve plate 18. Then, an axial pushing force is applied to the grouting pipe 2. The component force generated by the tapered grouting pipe outlet of the grouting pipe 2 acting on the abutting slope surface of the first valve plate 17 and the second valve plate 18 pushes the first valve plate 17 and the second valve plate 18 to the two sides to achieve valve opening. At the same time, the first return spring 19 and the second return spring 20 are compressed and accumulate spring force. Subsequently, the grouting pipe 2 penetrates between the first valve plate 17 and the second valve plate 18, and finally completely penetrates out of the outer grouting pipe perforation 21.

[0044] When the installation of the grouting pipe 2 is completed, the subsequent grouting reinforcement work can be performed. After the grouting process is completed, the grouting pipe 2 can be directly separated from the center hole of the hollow screw 6. After the grouting pipe 2 is separated, the first valve plate 17 and the second valve plate 18 restore the closed valve state under the action of the spring force of the first return spring 19 and the second return spring 20, so as to completely close the grouting channel.

[0045] The scheme in the embodiment is not used to limit the protection scope of the utility model. Any equivalent implementation or change without departing from the utility model is included in the protection scope of the utility model.

Claims

1. A tunnel segment reinforcement device, characterized in that: It includes a reinforcement box, a locking actuator, a grouting pipe, and a grouting valve mechanism; a reinforcement groove is provided on the joint surface of the tunnel segment, and the reinforcement box is fitted into the reinforcement groove; the locking actuator is located inside the reinforcement box; the grouting pipe is fitted into the locking actuator; the grouting valve mechanism is located at the axial end of the reinforcement box and is used in conjunction with the grouting pipe.

2. The tunnel segment reinforcement device according to claim 1, characterized in that: The reinforcement box adopts a rectangular structure; when two adjacent tunnel segments are joined together, the two reinforcement slots are engaged to form a rectangular slot, and the rectangular slot and the reinforcement box are fitted with a clearance fit.

3. The tunnel segment reinforcement device according to claim 2, characterized in that: The locking actuator includes a knob, a hollow lead screw, a lead screw nut slider, a clamping block, a first locking block, a second locking block, a first connecting rod, and a second connecting rod. The hollow lead screw is located inside the reinforcement box and is coaxially distributed with the reinforcement box. One end of the hollow lead screw extends from the axial end of the reinforcement box, and the knob is coaxially fixedly installed at the extending end of the hollow lead screw. A friction-reducing bearing is provided between the hollow lead screw and the through hole on the reinforcement box. The other end of the hollow lead screw is provided with an adapter plate, which is fixedly connected to the reinforcement box. A friction-reducing bearing is provided between the lead screw and the adapter plate. The hollow lead screw has only rotational freedom relative to the reinforcing box and the adapter plate. The central lead screw nut of the lead screw nut slider is fitted onto the hollow lead screw. One end of the first connecting rod is hinged to the outer slider of the lead screw nut slider, and the other end of the first connecting rod is hinged to the first clamping block. One end of the second connecting rod is hinged to the outer slider of the lead screw nut slider, and the other end of the second connecting rod is hinged to the second clamping block. The clamping block has a threaded hole in its center, and the clamping block is fitted onto the hollow lead screw through the threaded hole.

4. The tunnel segment reinforcement device according to claim 3, characterized in that: The central channel of the hollow screw serves as the passageway for the grouting pipe, and the outlet of the grouting pipe adopts a tapered structure.

5. The tunnel segment reinforcement device according to claim 3, characterized in that: The first connecting rod and the second connecting rod are symmetrically distributed in a mirror image with respect to the hollow lead screw; the first locking block and the second locking block are symmetrically distributed in a mirror image with respect to the hollow lead screw.

6. The tunnel segment reinforcement device according to claim 3, characterized in that: A clamping block guide slot is provided on the body of the reinforcement box. The clamping block is located in the clamping block guide slot and extends outward from the reinforcement box. The clamping block has only linear movement freedom relative to the clamping block guide slot, and the movement direction of the clamping block is consistent with the axial direction of the hollow lead screw.

7. A tunnel segment reinforcement device according to claim 3, characterized in that: The reinforced box has a guide slot for the locking blocks. The first locking block and the second locking block are both located in the guide slot. The first locking block and the second locking block have only linear movement freedom relative to the guide slot. The movement directions of the first locking block and the second locking block are always opposite, and the movement directions of the first locking block and the second locking block are perpendicular to the axis of the hollow lead screw.

8. A tunnel segment reinforcement device according to claim 3, characterized in that: When the first and second cards are at the inner limit point of their travel, the first and second cards are completely inside the reinforced box; when the first and second cards are at the outer limit point of their travel, the first and second cards extend outwards to the outside of the reinforced box.

9. A tunnel segment reinforcement device according to claim 3, characterized in that: When the reinforcement box is installed in the rectangular slot formed by the engagement of two adjacent tunnel segments by two reinforcement grooves, the knob and clamping block are located outside the concave side of the tunnel segment, and the first clamping block, the second clamping block and the grouting valve mechanism are located outside the convex side of the tunnel segment.

10. A tunnel segment reinforcement device according to claim 3, characterized in that: The grouting valve mechanism includes a valve baffle, a first valve plate, a second valve plate, a first return spring, and a second return spring. The valve baffle is fixedly installed on the body of the reinforcement box, forming a valve plate mounting cavity between the valve baffle and the body of the reinforcement box. The first and second valve plates are disposed within the valve plate mounting cavity, and are symmetrically distributed in a mirror image relative to the hollow screw. The mating surfaces of the first and second valve plates are both beveled. The first return spring is located within the valve plate mounting cavity and is connected between the back of the first valve plate and the valve baffle. The second return spring is located within the valve plate mounting cavity and is connected between the back of the second valve plate and the valve baffle. An external grouting pipe perforation is provided at the center of the valve baffle, and an internal grouting pipe perforation is provided within the body of the reinforcement box. The hollow screw, the external grouting pipe perforation, and the internal grouting pipe perforation are coaxially distributed.

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