Supporting structure for tunnel arch changing

Abstract

The invention discloses a supporting structure for tunnel arch changing, and relates to the technical field of tunnel construction. Comprising a supporting frame which is high in the middle and low in two sides and is in a multi-step shape; the multiple jacking assemblies are arranged along the periphery of the supporting frame, and the jacking assemblies are used for supporting a tunnel vault; the plurality of construction platforms are arranged on each step of the support frame; and the walking assembly is arranged at the bottom of the supporting frame, and the walking assembly is used for driving the supporting frame to move. The tunnel arch crown can be effectively supported, the tunnel arch crown supporting device is suitable for limit invasion treatment and arch replacement requirements of various types of tunnels, has the advantages of being simple in structure, convenient to operate, low in cost and the like, and has wide application prospects in future tunnel construction and development.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and particularly to a support structure for tunnel arch replacement. Background Art

[0002] Tunnel engineering is an important infrastructure in the fields of transportation, water conservancy, energy, etc. Its stability and safety are of great significance for protecting people's lives and property. However, during the tunnel construction process, due to the influence of factors such as geological conditions and construction methods, problems such as vault deformation and intrusion are likely to occur, seriously affecting the stability and safety of the tunnel. Therefore, how to replace the structure with excessive deformation of the tunnel vault and improve the stability and safety of the tunnel is an important issue in the field of tunnel engineering technology.

[0003] Tunnel arch replacement is an important technology in tunnel construction. It can improve the stability and safety of the tunnel in a short time and is an emergency method for dealing with large deformations of the tunnel vault. The role of tunnel arch replacement is to quickly reinforce the deformed support, ensure construction safety, and restore the stability of the tunnel structure. However, during the arch replacement process, due to the change of the vault structure, an effective support structure is needed to maintain the stability of the tunnel. Existing support structures are often complex and bulky, bringing many inconveniences to construction and unable to effectively ensure construction safety. Therefore, a new type of, efficient, and safe support structure for tunnel arch replacement is urgently needed. Summary of the Invention

[0004] The main purpose of the present invention is to provide a support structure for tunnel arch replacement to solve the above problems.

[0005] To achieve the above object, the present invention provides a support structure for tunnel arch replacement, including:

[0006] A support frame, the middle of the support frame is high and both sides are low, presenting a multi-level stepped shape;

[0007] A plurality of jacking assemblies, the plurality of jacking assemblies are arranged along the outer periphery of the support frame, and the jacking assemblies are used to support the tunnel vault;

[0008] A plurality of construction platforms, the plurality of construction platforms are arranged on each step of the support frame;

[0009] A traveling assembly, the traveling assembly is arranged at the bottom of the support frame, and the traveling assembly is used to drive the support frame to move.

[0010] Further, the jacking assembly includes a hydraulic jack, the fixed end of the hydraulic jack is rotatably connected to the support frame, and a cushion block is arranged at the movable end of the hydraulic jack.

[0011] Furthermore, two hydraulic jacks are arranged along the length direction of the tunnel, and the two hydraulic jacks are symmetrically arranged at both ends of the support frame.

[0012] Furthermore, the jacking assembly further includes two connecting frames, the connecting frames are detachably connected to the movable ends of the two hydraulic jacks respectively, the length direction of the connecting frames is consistent with the length direction of the tunnel, an installation frame is arranged at one end of the connecting frame close to the other connecting frame, the first end of the installation frame is rotatably connected to the connecting frame, the second end is detachably connected to the other installation frame, and the cushion block is arranged on the connecting frame.

[0013] Furthermore, a pressure sensor, a displacement sensor and an inclination sensor are arranged on the connecting frame, a centralized controller is arranged on the support frame, the pressure sensor, the displacement sensor, the inclination sensor and the hydraulic jack are electrically connected, and the centralized controller is used to adjust the extension length of the hydraulic jack according to the feedback of the pressure sensor, the displacement sensor and the inclination sensor.

[0014] Furthermore, the traveling assembly includes a plurality of transverse telescopic rods symmetrically arranged at both ends of the support frame, and a longitudinal telescopic rod is arranged at one end of the transverse telescopic rod far away from the support frame.

[0015] Furthermore, steel gaskets are arranged at the bottoms of the support frame and the longitudinal telescopic rod.

[0016] The present invention can effectively support the tunnel vault, is suitable for the intrusion treatment and arch replacement requirements of various types of tunnels, and has the advantages of simple structure, convenient operation, low cost, etc., and has a wide application prospect in the future tunnel construction and development. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall support structure for tunnel arch replacement of the present invention.

[0018] Figure 2 It is a top view schematic diagram of the tunnel arch replacement of the present invention.

[0019] Figure 3 It is a side view schematic diagram of the tunnel arch replacement of the present invention.

[0020] Wherein, 1 - support frame; 2 - traveling assembly; 3 - hydraulic jack; 4 - connecting frame; 5 - installation frame; 6 - transverse telescopic rod; 7 - longitudinal telescopic rod; 8 - arch frame; 9 - encroaching arch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to achieve the above-mentioned purpose and effect, the technical means and structure adopted by the present invention will be described in detail in combination with the drawings for the preferred embodiments of the present invention to illustrate their features and functions.

[0022] As Figures 1 - 3 shown, a support structure for tunnel arch replacement is provided in the present invention, including:

[0023] A support frame 1, with the middle of the support frame 1 being higher and the two sides being lower, presenting a multi-level stepped shape;

[0024] Lifting assemblies, with multiple lifting assemblies arranged along the outer periphery of the support frame 1, and the lifting assemblies being used to support the tunnel vault;

[0025] Multiple construction platforms, with multiple construction platforms arranged on each step of the support frame 1, thereby facilitating the construction of staff at different heights;

[0026] A traveling assembly 2, with the traveling assembly 2 arranged at the bottom of the support frame 1, and the traveling assembly 2 being used to drive the movement of the support frame 1.

[0027] Specifically, the support frame 1 is composed of multiple crossbars, vertical bars, and longitudinal crossbars, and the connections of the crossbars, vertical bars, and longitudinal crossbars are quickly connected through splicing fasteners or hydraulic locking devices.

[0028] Specifically, the lifting assembly includes a hydraulic jack 3. The fixed end of the hydraulic jack 3 is rotatably connected to the support frame 1, and a cushion block is arranged at the movable end of the hydraulic jack 3. The staff can adjust the position of the hydraulic jack 3 to face the vault directly, and extend the hydraulic jack 3 so that the cushion block abuts against the vault, forming a stable support framework to provide necessary support for the tunnel, ensuring the safety and stability of the construction. At the same time, multiple lifting assemblies effectively disperse the pressure on the top of the tunnel, avoiding structural deformation or damage caused by concentrated stress.

[0029] Preferably, two hydraulic jacks 3 are arranged along the length direction of the tunnel, and the two hydraulic jacks 3 are symmetrically arranged at both ends of the support frame 1. The lifting assembly further includes two connecting frames 4. The connecting frames 4 are respectively detachably connected to the movable ends of the two hydraulic jacks 3. The length direction of the connecting frames 4 is consistent with the length direction of the tunnel. An installation frame 5 is arranged at one end of the connecting frame 4 close to the other connecting frame 4. The first end of the installation frame 5 is rotatably connected to the connecting frame 4, and the second end is detachably connected to the other installation frame 5. A limiting block for fixing the installation frame 5 is also arranged on the connecting frame 4, which is used to fix the installation frame 5 on the connecting frame 4 after the two installation frames 5 are disassembled. The cushion block is arranged on the connecting frame 4.

[0030] Thereby, the connecting frame 4 is used to support multiple arch frames 8 of the vault simultaneously, further improving the overall stability. The connecting frame 4 can also play a protective role for the construction staff below to a certain extent, avoiding the construction staff from being injured by falling crushed stones when the vault is demolished.

[0031] During use, first move this device to the tunnel intrusion area, adjust the position of the hydraulic jack 3 and make the connecting frame 4 abut against the arch frame 8 of the intrusion arch 9 to support the top of the tunnel. Then, starting from the arch foot on one side of the tunnel, sequentially open the corresponding two mounting frames 5. Each time a group of mounting frames 5 is opened, a working window is formed between the two connecting frames 4. Construction workers can remove the arch frame 8 in this part of the working window, chisel the intruding rock and soil, and install a new arch frame 8. After the installation of the new arch frame 8 is completed, reconnect the two mounting frames 5 and continue to operate on the corresponding part of the next group of mounting frames 5 until all the arch frames 8 are replaced.

[0032] In this embodiment, a pressure sensor, a displacement sensor, and an inclination sensor are provided on the connecting frame 4, and a centralized controller is provided on the support frame 1. The pressure sensor, the displacement sensor, the inclination sensor, and the hydraulic jack 3 are electrically connected. The centralized controller is used to automatically adjust the extension length of the hydraulic jack 3 according to the feedback of the pressure sensor, the displacement sensor, and the inclination sensor, so as to adapt to arch frames 8 with different deformation degrees, and improve the support capacity and stability.

[0033] In another embodiment, the traveling assembly 2 includes a plurality of transverse telescopic rods 6 symmetrically arranged at both ends of the support frame 1. A longitudinal telescopic rod 7 is provided at the end of the transverse telescopic rod 6 away from the support frame 1. When the device moves, the longitudinal telescopic rod 7 extends to lift the support frame 1 off the ground, then change the length of the transverse telescopic rod 6 to move the support frame horizontally, then shorten the longitudinal telescopic rod 7 to make the support frame 1 abut against the ground and the longitudinal telescopic rod 7 leave the ground, and finally reset the transverse telescopic rod 6 to complete the movement of a certain distance.

[0034] Specifically, steel gaskets are provided at the bottoms of the support frame 1 and the longitudinal telescopic rod 7. This increases the contact area of the support structure with the ground, further enhances its stability, and thus ensures the safe and smooth progress of tunnel construction.

[0035] The above description is only for the preferred embodiments of the present invention, not all embodiments. Anyone should know that structural changes made under the inspiration of the present invention, as long as they have the same or similar technical solutions as the present invention, all belong to the protection scope of the present invention.

Claims

1. A tunnel arch replacement support structure, characterized in that: include: A support frame (1), wherein the support frame (1) is high in the middle and low on both sides, forming a multi-step shape; A jacking assembly, a plurality of which are arranged along the outer circumference of the support frame (1), and the jacking assembly is used to support the tunnel vault; A plurality of construction platforms, wherein the plurality of construction platforms are arranged on each step of the support frame (1); A running assembly (2), wherein the running assembly (2) is arranged at the bottom of the support frame (1), and the running assembly (2) is used to drive the support frame (1) to move.

2. A tunnel arch replacement support structure as claimed in claim 1, characterized in that: The lifting assembly comprises a hydraulic jack (3), the fixed end of the hydraulic jack (3) is rotatably connected to the support frame (1), and the movable end of the hydraulic jack (3) is provided with a cushion block.

3. A tunnel arch replacement support structure as claimed in claim 2, characterized in that: Two hydraulic jacks (3) are arranged along the length direction of the tunnel, and the two hydraulic jacks (3) are symmetrically arranged at both ends of the support frame (1).

4. A tunnel arch replacement support structure as claimed in claim 3, characterized in that: The jacking assembly further comprises two connecting frames (4), wherein the connecting frames (4) are respectively detachably connected to the movable ends of the two hydraulic jacks (3), the length direction of the connecting frames (4) is consistent with the length direction of the tunnel, and a mounting frame (5) is arranged at one end of the connecting frame (4) close to the other connecting frame (4), the first end of the mounting frame (5) is rotatably connected to the connecting frame (4), and the second end is detachably connected to the other mounting frame (5), and the cushion block is arranged on the connecting frame (4).

5. The supporting structure for tunnel arch replacement according to claim 4, characterized in that: The connecting frame (4) is provided with a pressure sensor, a displacement sensor and an inclination sensor, the supporting frame (1) is provided with a centralized controller, the pressure sensor, the displacement sensor, the inclination sensor and the hydraulic jack (3) are electrically connected, and the centralized controller is used to adjust the extension length of the hydraulic jack (3) according to feedback from the pressure sensor, the displacement sensor and the inclination sensor.

6. The supporting structure for tunnel arch replacement according to claim 1, characterized in that: The running assembly (2) comprises a plurality of transverse telescopic rods (6) symmetrically arranged at two ends of the support frame (1), and a longitudinal telescopic rod (7) is arranged at one end of the transverse telescopic rod (6) away from the support frame (1).

7. The supporting structure for tunnel arch replacement according to claim 6, characterized in that: Steel gaskets are provided at the bottom of the support frame (1) and the longitudinal telescopic rod (7).

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