Tunnel post-earthquake repair system and tunnel post-earthquake repair method

Abstract

The invention relates to the technical field of tunnel repair, in particular to a tunnel post-earthquake repair system and a tunnel post-earthquake repair method. The tunnel post-earthquake repair system comprises a waterproof plate, a lining ring, a reinforcement meter, a concrete strain meter and a laser displacement meter. The waterproof plate is adhered to the original tunnel lining, the lining ring is arranged on the inner side of the original tunnel lining, and the lining ring abuts against the waterproof plate; the steel bar meter, the concrete strain meter and the laser displacement meter are all arranged on the lining ring. Through the arrangement, the original lining with the cracks can still exert the bearing capacity, and through the arrangement of the steel bar meter, the concrete strain meter and the laser displacement meter, the magnitude of force transmitted to the lining ring by the original lining with the cracks can be effectively monitored, and the mechanical state of the lining ring can be effectively known.

Description

Technical Field

[0001] The present disclosure relates to the technical field of tunnel repair, and in particular to a tunnel post-earthquake repair system and a tunnel post-earthquake repair method. Background Art

[0002] Typical earthquake damage to tunnels includes lining cracking and deformation, spalling, falling blocks, water leakage, partial or complete collapse, etc. When an earthquake causes serious damage to a tunnel, such as lining segment damage, large-scale spalling and falling blocks, the tunnel needs to be rebuilt.

[0003] However, if the damage to the tunnel caused by the earthquake is relatively minor, such as slight deformation of the lining and the generation of small cracks, the original lining still has a large bearing capacity, and certain reinforcement measures can be taken to strengthen it and maximize the use of the remaining bearing capacity of the original lining. However, at present, for safety reasons, post-earthquake damage to tunnels is generally rebuilt. For tunnels that only have small cracks, the economic efficiency of the reconstruction plan is poor, and the remaining bearing capacity of the original lining cannot be used. It is also difficult to detect the internal mechanical state of the repaired tunnel and it is impossible to grasp the condition of the repaired tunnel. Summary of the invention

[0004] In order to solve the above technical problems, the present disclosure provides a tunnel post-earthquake repair system and a tunnel post-earthquake repair method.

[0005] The present disclosure provides a post-earthquake repair system for a tunnel, comprising a waterproof board, a lining ring, a steel bar meter, a concrete strain gauge, and a laser displacement meter. The steel bar meter is used to measure the force applied to the lining ring, the concrete strain gauge is used to detect the strain inside the lining ring, and the laser displacement meter is used to be arranged in the concrete lining ring to measure the opening and closing degree of the lining ring to monitor the deformation, displacement, settlement, strain, and slippage of the tunnel.

[0006] The waterproof board is bonded to the original tunnel lining, the lining ring is arranged on the inner side of the original tunnel lining, and the lining ring abuts against the waterproof board, a plurality of lining rings are provided, and the plurality of lining rings are connected by flexible joints.

[0007] The rebar meter, the concrete strain meter and the laser displacement meter are all arranged on the lining ring. The rebar meter, the concrete strain meter and the laser displacement meter are arranged to monitor the mechanical state transmitted to the lining ring by the original cracked lining.

[0008] Optionally, an energy absorbing member is further included, and the energy absorbing member is arranged between the original tunnel lining and the lining ring.

[0009] Optionally, chemical bolts are also included, and the chemical bolts connect the lining ring and the original tunnel lining.

[0010] Optionally, an early warning system is also included, and the steel bar meter, the concrete strain gauge and the laser displacement meter are all electrically connected to the early warning system.

[0011] Optionally, a pressure box is further included, and the pressure box is arranged in the original tunnel lining.

[0012] Optionally, a plurality of lining rings are provided, and the plurality of lining rings are connected using flexible joints.

[0013] Optionally, the length of the lining ring is 12m.

[0014] Optionally, the steel bar meter, the concrete strain gauge and the laser displacement meter are each provided in plurality.

[0015] The present disclosure also provides a tunnel post-earthquake repair method, using the tunnel post-earthquake repair system as described above, comprising the following steps:

[0016] S1: Repair the cracks in the original tunnel lining;

[0017] S2: multiple pressure boxes are set on the original tunnel lining, and waterproof sheets are bonded at the cracks of the original tunnel lining;

[0018] S3: concrete strain gauges are set on both sides of the lining ring;

[0019] S4: laying energy absorbers between the original tunnel lining and the lining ring;

[0020] S5: Use chemical bolts to connect the lining ring to the original tunnel lining.

[0021] Optionally, after step S5, the following steps are also included:

[0022] S6: Connect the concrete strain gauge, rebar gauge, laser displacement gauge and pressure cell to the early warning system.

[0023] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0024] The present disclosure provides a post-earthquake repair system for a tunnel, including a waterproof board, a lining ring, a rebar gauge, a concrete strain gauge and a laser displacement meter. The waterproof board is bonded to the original tunnel lining with cracks. The rebar gauge and the laser displacement meter are arranged in the lining ring, and the concrete strain gauge is arranged on both sides of the lining ring. After the concrete strain gauge, the laser displacement meter and the rebar gauge are arranged in the lining ring, the lining ring is then connected to the original cracked lining. Through the above-mentioned arrangement, the original cracked lining of the present disclosure can still exert its bearing capacity, and through the arrangement of the rebar gauge, the concrete strain gauge and the laser displacement meter, it is possible to effectively monitor the magnitude of the force transmitted from the original cracked lining to the lining ring, and effectively understand the mechanical state of the lining ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] Figure 1 It is an overall structural diagram of the post-earthquake repair system for a tunnel according to an embodiment of the present disclosure;

[0028] Figure 2 It is a schematic diagram of a concrete strain gauge according to an embodiment of the present disclosure;

[0029] Figure 3 A schematic diagram of a pressure box according to an embodiment of the present disclosure;

[0030] Figure 4 It is a schematic diagram of the energy absorbing member described in the embodiment of the present disclosure.

[0031] Among them, 1. waterproof board; 2. lining ring; 3. concrete strain gauge; 4. original tunnel lining; 5. energy absorbing parts; 6. chemical bolts; 7. early warning system; 8. pressure box. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0034] The present disclosure provides a post-earthquake repair system for a tunnel, comprising a waterproof board 1, a lining ring 2, a steel bar gauge, a concrete strain gauge 3 and a laser displacement meter;

[0035] The waterproof board 1 is bonded to the original tunnel lining 4, the lining ring 2 is arranged on the inner side of the original tunnel lining 4, and the lining ring 2 abuts against the waterproof board 1;

[0036] The steel bar gauge, concrete strain gauge 3 and laser displacement meter are all arranged on the lining ring 2 .

[0037] like Figures 1 to 4 As shown, the present disclosure provides a post-earthquake repair system for a tunnel, including a waterproof board 1, a lining ring 2, a steel bar meter, a concrete strain gauge 3 and a laser displacement meter. Among them, the waterproof board 1 is bonded to the original tunnel lining 4 with cracks. In addition, the lining ring 2 in this embodiment is a prefabricated structure, and the steel bar meter and the laser displacement meter are set in the lining ring 2 during prefabrication, and the concrete strain gauge 3 is set on both sides of the lining ring 2, facing and away from the original tunnel lining 4 with cracks. The steel bar meter is used to measure the force applied to the lining ring 2. The laser displacement meter is used to be arranged in the concrete lining ring 2, measure the opening and closing degree of the lining ring 2, and monitor the deformation, displacement, settlement, strain, slippage, etc. of the tunnel. The concrete strain gauge 3 is used to detect the strain inside the lining ring 2. After the concrete strain gauge 3, the laser displacement meter and the steel bar meter are set in the lining ring 2, the lining ring 2 is then connected to the original lining with cracks.

[0038] Through the above-mentioned settings, the original cracked lining in this embodiment can still exert its bearing capacity, and through the settings of the steel bar meter, concrete strain gauge 3 and laser displacement meter, the magnitude of the force transmitted from the original cracked lining to the lining ring 2 can be effectively monitored, and the mechanical state of the lining ring 2 can be effectively understood.

[0039] In this embodiment, an energy absorbing member 5 is also included, and the energy absorbing member 5 is arranged between the original tunnel lining 4 and the lining ring 2. The energy absorbing member 5 in this embodiment is evenly distributed between the original tunnel lining 4 and the lining ring 2. The energy absorbing member 5 can be polyurethane, foam material or rubber material, and the above materials can play an energy absorbing role. The specific selection is not limited here. When the tunnel encounters an earthquake, due to the setting of the energy absorbing member 5, when it is displaced and the tunnel is compressed, the energy absorbing material deforms, absorbs the energy during the earthquake, and ensures the safety of the tunnel.

[0040] In order to connect the original tunnel lining 4 and the lining ring 2, chemical bolts 6 are also included, and the chemical bolts 6 connect the lining ring 2 and the original tunnel lining 4. The chemical bolts 6 use the bond strength and mechanical bite force between the chemical bolts 6 and the concrete to resist pulling out and the bolts themselves to resist shearing.

[0041] In this embodiment, an early warning system 7 is also included, and the rebar meter, concrete strain gauge 3 and laser displacement meter are all electrically connected to the early warning system 7. The rebar meter, concrete strain gauge 3 and laser displacement meter in this embodiment are all electrically connected to the early warning system 7, and the data obtained by the rebar meter, concrete strain gauge 3 and laser displacement meter will be transmitted to the early warning system 7. The early warning system 7 includes a control unit and an alarm unit. The control unit will determine whether the data obtained by the rebar meter, concrete strain gauge 3 and laser displacement meter is within the threshold range. If it exceeds the threshold range, the control unit will control the alarm unit to send out sound and light signals to remind the user.

[0042] In addition, the present embodiment also includes a pressure box 8, and a plurality of pressure boxes 8 are provided and are evenly arranged around the original tunnel lining 4. The pressure box 8 is used to measure the stress in the lining medium. The plurality of pressure boxes 8 are evenly arranged around the original tunnel lining 4, and the stress at each position in the lining medium can be monitored by data. The pressure box 8 is also electrically connected to the early warning system 7, and the data obtained by the pressure box 8 is also transmitted to the early warning system 7, and the early warning system 7 determines whether to issue an alarm signal.

[0043] In this embodiment, there are multiple lining rings 2, and multiple flexible joints are also provided. The multiple lining rings 2 are connected by flexible joints. There are multiple lining rings 2, and after being connected to each other, the overall flexibility of the tunnel post-earthquake repair system can be increased, and the deformation and dislocation of the tunnel after the earthquake can be adapted. The flexible joint is a prior art and will not be described in detail here.

[0044] In this embodiment, the length of the lining ring 2 is 12 m. A plurality of lining rings 2 form a tunnel post-earthquake repair system for repairing post-earthquake tunnels. Of course, the length of the lining ring 2 in this embodiment can be set to more than 12 m, and can also be other lengths.

[0045] In addition, in this embodiment, multiple rebar meters, concrete strain gauges 3 and laser displacement meters are provided and evenly distributed around the circumference of the lining ring 2, so that various data at various positions around the circumference of the lining ring 2 can be accurately obtained.

[0046] The present disclosure also provides a tunnel post-earthquake repair method, using the tunnel post-earthquake repair system as described above, comprising the following steps:

[0047] S1: Repair the cracks in the original tunnel lining 4. Certain reinforcement measures are taken for the cracks in the original tunnel lining 4, and the remaining bearing capacity of the original lining can be utilized.

[0048] S2: multiple pressure boxes 8 are arranged on the original tunnel lining 4, and waterproof boards 1 are bonded to the cracks of the original tunnel lining 4. The arrangement of the waterproof boards 1 prevents water vapor or liquid from penetrating into the cracks and affecting the structural strength of the original tunnel lining 4.

[0049] S3: concrete strain gauges 3 are respectively arranged on both sides of the lining ring 2. Specifically, the concrete strain gauges 3 are respectively facing and away from the original tunnel lining 4 with cracks.

[0050] S4: laying energy absorbing parts 5 between the original tunnel lining 4 and the lining ring 2. Due to the arrangement of the energy absorbing parts 5, when the tunnel is displaced and compressed, the energy absorbing material deforms to absorb the energy during the earthquake and ensure the safety inside the tunnel.

[0051] S5: Use chemical bolts 6 to connect the lining ring 2 to the original tunnel lining 4. The chemical bolts 6 use the bond strength and mechanical bite force between the chemical bolts 6 and the concrete to resist pulling out and the bolts themselves to resist shearing.

[0052] S6: Connect the concrete strain gauge 3, the steel bar gauge, the laser displacement meter and the pressure box 8 to the early warning system 7. The steel bar gauge is used to measure the force on the lining ring 2; the concrete strain gauge 3 is used to detect the strain inside the lining ring 2; the pressure box 8 is used to measure the stress inside the lining medium, and through the setting of the steel bar gauge, the concrete strain gauge 3 and the laser displacement meter, the magnitude of the force transmitted from the original cracked lining to the lining ring 2 can be effectively monitored, and the mechanical state of the lining ring 2 can be effectively understood.

[0053] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0054] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A post-earthquake tunnel repair system, characterized in that: It comprises a waterproof plate (1), a lining ring (2), a steel bar meter, a concrete strain gauge (3), and a laser displacement meter, wherein the steel bar meter is used to measure the force applied to the lining ring (2), the concrete strain gauge (3) is used to detect the amount of strain inside the lining ring (2), and the laser displacement meter is used to be arranged in the concrete lining ring (2) and is used to measure the opening and closing degree of the lining ring (2) to monitor the deformation, displacement, subsidence, strain, and slippage of the tunnel; The waterproof board (1) is bonded to the original tunnel lining (4), the lining ring (2) is arranged on the inner side of the original tunnel lining (4), and the lining ring (2) is in contact with the waterproof board (1), a plurality of lining rings (2) are provided, and the plurality of lining rings (2) are connected using flexible joints; The rebar meter, the concrete strain meter (3) and the laser displacement meter are all arranged on the lining ring (2). The rebar meter, the concrete strain meter (3) and the laser displacement meter are arranged to monitor the mechanical state transmitted from the original cracked lining to the lining ring (2).

2. The post-earthquake repair system for tunnels according to claim 1, characterized in that: It also comprises an energy absorbing member (5), wherein the energy absorbing member (5) is arranged between the original tunnel lining (4) and the lining ring (2).

3. The post-earthquake tunnel repair system according to claim 1, characterized in that: It also comprises chemical bolts (6), wherein the chemical bolts (6) connect the lining ring (2) and the original tunnel lining (4).

4. The post-earthquake repair system for tunnels according to claim 1, characterized in that: It also comprises an early warning system (7), and the steel bar meter, the concrete strain meter (3) and the laser displacement meter are all electrically connected to the early warning system (7).

5. The post-earthquake repair system for tunnels according to claim 1, characterized in that: It also comprises a pressure box (8), wherein the pressure box (8) is arranged in the original tunnel lining (4).

6. The post-earthquake repair system for tunnels according to claim 1, characterized in that: A plurality of lining rings (2) are provided, and the plurality of lining rings (2) are connected using flexible joints.

7. The post-earthquake tunnel repair system according to claim 1, characterized in that: The length of the lining ring (2) is 12m.

8. The post-earthquake repair system for tunnels according to claim 1, characterized in that: The steel bar meter, the concrete strain meter (3) and the laser displacement meter are all provided in plurality.

9. A tunnel post-earthquake repair method, using the tunnel post-earthquake repair system according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Repair the cracks in the original tunnel lining (4); S2: a plurality of pressure boxes (8) are arranged on the original tunnel lining (4), and waterproof boards (1) are bonded to cracks of the original tunnel lining (4); S3: concrete strain gauges (3) are respectively arranged on both sides of the lining ring (2); S4: laying an energy absorbing member (5) between the original tunnel lining (4) and the lining ring (2); S5: Use chemical bolts (6) to connect the lining ring (2) to the original tunnel lining (4).

10. The post-earthquake repair system for tunnels according to claim 9, characterized in that: After step S5, the following steps are also included: S6: Connect the concrete strain gauge (3), the steel bar gauge, the laser displacement gauge and the pressure cell (8) to the early warning system (7).

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