Reconstruction and extension tunnel existing lining dismantling and recycling trolley and construction method

Abstract

The invention relates to the technical field of tunnel construction, and discloses a reorganization and extension tunnel existing lining dismantling and recycling trolley and a construction method.The reorganization and extension tunnel existing lining dismantling and recycling trolley comprises a trolley body, and a supporting frame is fixedly connected to the top end of the trolley body; the pressure-bearing devices are arranged at the top end of the supporting frame in the circumferential direction, and the trolley body supports the top end of the interior of the tunnel through the pressure-bearing devices; and the positioning cutting mechanism is arranged on the trolley body and used for positioning and dismantling the existing lining of the tunnel, and the dismantled lining is conveyed out of the tunnel through the trolley body to be recycled. According to the method, disturbance to surrounding rocks of the expanded excavation tunnel is reduced, the influence of building waste materials on the environment is reduced, the lining segments are recycled and reused, resources are fully utilized, the recycled lining segments are used as an expanded tunnel backfill roadbed, a large amount of surrounding soil and stones do not need to be excavated, and the influence on the environment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, and in particular to a trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion, and a construction method. Background Art

[0002] With the acceleration of urbanization, the continuous increase in population and the sharp rise in traffic volume, some existing tunnel facilities cannot meet the growing traffic demand. In order to effectively alleviate traffic congestion, improve safety, adapt to traffic changes, promote regional economic development, and enhance the ability to respond to emergencies, some existing tunnels have been renovated and expanded.

[0003] The expansion project requires the removal of the existing tunnel lining. The method of removing the lining first and then excavating is likely to cause the existing tunnel surrounding rock to fall off or even collapse. Therefore, the current method of blasting and excavating the rock mass and lining together is often used. This method has the following problems: (1) In the early stage of tunnel construction, the engineering analogy method was often used. The initial support and secondary lining design schemes are often conservative, with a large amount of steel frames and anchors, a large concrete thickness, and a high overall strength of the steel-concrete structure. Compared with the rock mass, a large amount of blasting operations is required, and it is difficult to control the disturbance to the surrounding rock of the expanded tunnel; (2) The blasting of the existing lining will produce a large amount of concrete debris, which will be mixed with the broken rock. The subsequent treatment is time-consuming and labor-intensive, and it is easy to cause environmental pollution.

[0004] The method of tunnel reconstruction and expansion is usually to backfill the lower part of the existing tunnel and excavate the upper part. Backfilling requires the transportation of a large amount of soil and rock. This process has the following problems: (1) Excavating and transporting a large amount of backfill soil and rock nearby will damage the surrounding environment; (2) The backfill soil and rock need to provide support for the side walls to prevent the side walls from overturning, and also need to ensure the smooth driving of construction vehicles. Therefore, the backfill soil and rock need to be compacted, and the transportation and compaction process is labor-intensive; (3) After the upper part of the tunnel is expanded and supported, the compacted backfill soil and rock in the lower part needs to be excavated again, which depends on the construction efficiency of excavators.

[0005] In addition, architectural concrete is a recyclable material, and the lining itself is installed with a large amount of high-strength steel. Direct blasting and crushing will be difficult to separate from the rock and cannot be recycled, resulting in a certain amount of waste.

[0006] Therefore, there is an urgent need for a trolley and a construction method for dismantling and recovering the existing lining of a tunnel for reconstruction and expansion, so as to solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to provide a trolley and a construction method for dismantling and recovering existing lining of a tunnel for reconstruction and expansion, so as to solve the problems existing in the above-mentioned prior art.

[0008] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides a trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion, comprising:

[0009] A trolley body, wherein a support frame is fixedly connected to the top of the trolley body;

[0010] A plurality of pressure-bearing devices are arranged at the top of the support frame along the circumferential direction, and the trolley body supports the top of the tunnel interior through the plurality of pressure-bearing devices;

[0011] The positioning and cutting mechanism is arranged on the trolley body and is used for positioning and removing the existing lining of the tunnel. The removed lining is transported out of the tunnel through the trolley body for recovery.

[0012] According to the present invention, a trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion is provided, wherein the positioning and cutting mechanism comprises:

[0013] A laser sensing positioning device is arranged on the trolley body and is used to locate the outer contour surface of the lining and the position to be cut;

[0014] The cutting device is arranged on the trolley body and is used for cutting and removing the lining.

[0015] According to a trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion provided by the present invention, the cutting device comprises: a main cutting device and an auxiliary cutting device, the main cutting device is used for cutting concrete on the lining, and the auxiliary cutting device is used for cutting steel bars, steel arch frames, steel meshes and anchor trays on the lining.

[0016] According to the present invention, a trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion is provided, wherein the pressure-bearing device is a screw-type jack.

[0017] According to a trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion provided by the present invention, the support frame is an arched support frame, and the support frame comprises at least two frames.

[0018] According to a trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion provided by the present invention, the distance between two adjacent frames is the excavation footage length minus twice the thickness of the support frame.

[0019] According to a trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion provided by the present invention, a power distribution box is installed on the trolley body.

[0020] A construction method for dismantling and recycling existing lining of a tunnel for reconstruction and expansion, comprising the following steps:

[0021] The trolley body is driven into the lower part of the existing tunnel to be excavated, and the tunnel is supported by the pressure-bearing device;

[0022] The existing lining of the tunnel is positioned and removed by the positioning and cutting mechanism;

[0023] After the lining is removed, the removed lining is transported out of the tunnel using the trolley body.

[0024] According to a construction method for dismantling and recycling an existing lining of a tunnel for reconstruction and expansion provided by the present invention, before the lining is positioned and dismantled, a groove is drilled at the contact surface between the existing lining and the surrounding rock by an auxiliary drilling tool to separate the two.

[0025] According to a construction method for dismantling and recycling existing lining of a tunnel for reconstruction and expansion provided by the present invention, the recycled lining is cut into strips.

[0026] Compared with the prior art, the present invention has the following advantages and technical effects:

[0027] The present invention provides a trolley and construction method for dismantling and recovering the existing lining of a tunnel for renovation and expansion. The trolley body moves into the tunnel, first supports the top of the tunnel through a pressure-bearing device, and then positions and removes the lining through a positioning and cutting mechanism. The removed lining is transported out of the tunnel through the trolley body for recycling and reuse, and then transported to the unconstructed tunnel section for backfilling. The present invention uses mechanical demolition to replace part of the blasting operation, reducing the disturbance to the surrounding rock of the expanded tunnel. The lining segments are completely removed by positioning and cutting, without mixing with broken rocks, which is convenient for subsequent treatment and reduces the impact of construction waste on the environment. The lining segments are recycled and reused, making full use of resources. The recycled lining segments are used as the backfill roadbed for the expanded tunnel, without the need to excavate a large amount of surrounding soil and rock, reducing the impact on the environment. At the same time, the strength and stability are higher than soil and rock, providing sufficient support for the side wall. Compared with soil and rock, the construction efficiency of the subsequent removal process is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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 are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0029] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention;

[0030] Figure 2 It is a cross-sectional schematic diagram of the pressure bearing device of the present invention;

[0031] Figure 3 This is a schematic diagram of the tunneling process after backfilling by removing the lining segments according to the present invention;

[0032] Figure 4 It is a schematic diagram of the construction method of the present invention;

[0033] Among them, 1. Support frame; 2. Pressure-bearing device; 3. Laser sensing positioning device; 4. Main cutting device; 5. Auxiliary cutting device; 6. Distribution box; 7. Soil and stone; 8. Lining segment; 9. Trolley body. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Reference Figure 1-Figure 4 The present invention provides a trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion, comprising:

[0037] A trolley body 9, the top of which is fixedly connected to a support frame 1;

[0038] A plurality of pressure-bearing devices 2 are arranged at the top of the support frame 1 along the circumferential direction, and the trolley body 9 supports the top of the tunnel interior through the plurality of pressure-bearing devices 2;

[0039] The positioning and cutting mechanism is arranged on the trolley body 9 and is used for positioning and removing the existing lining of the tunnel, and the removed lining is transported out of the tunnel through the trolley body 9 for recycling.

[0040] Specifically, the trolley body 9 moves into the tunnel, first supports the top of the tunnel through the pressure-bearing device 2, and then positions and removes the lining through the provided positioning and cutting mechanism. The removed lining is transported out of the tunnel by the trolley body 9 for recycling and reuse, and then transported to the unconstructed tunnel section for backfilling.

[0041] As an optional implementation, the positioning and cutting mechanism includes:

[0042] The laser sensing positioning device 3 is arranged on the trolley body 9 and is used to locate the outer contour surface of the lining and the position to be cut;

[0043] The cutting device is arranged on the trolley body 9 and is used for cutting and removing the lining.

[0044] Specifically, before cutting, the laser sensing positioning device 3 is used to locate the position to be cut.

[0045] As an optional embodiment, the cutting device includes: a main cutting device 4 and an auxiliary cutting device 5, the main cutting device 4 is used to cut concrete on the lining, and the auxiliary cutting device 5 is used to cut steel bars, steel arches, steel meshes and anchor trays on the lining.

[0046] Specifically, the main cutting device 4 is a high-pressure hydraulic cutting device for cutting concrete on the lining, and the auxiliary cutting device 5 is used for cutting steel bars, steel arches, steel meshes and anchor trays on the lining.

[0047] Specifically, the laser sensing positioning device 3 , the main cutting device 4 and the auxiliary cutting device 5 can all move on the trolley body 9 .

[0048] As an optional implementation, the pressure-bearing device 2 is a screw jack.

[0049] Specifically, the pressure-bearing device 2 is a screw-type jack, which avoids the use of a hydraulic jack and avoids the situation where the pressure-bearing device 2 is unloaded, thereby ensuring stable support.

[0050] As an optional implementation, the support frame 1 is an arched support frame, and the support frame 1 is composed of at least two frames.

[0051] Specifically, the support frame 1 is an arched support frame and a steel structure, which matches the shape of the interior of the tunnel, further ensuring stable construction in the tunnel.

[0052] As an optional implementation, the distance between two adjacent frames is the excavation footage length minus twice the thickness of the support frame 1.

[0053] Specifically, the distance between two adjacent frames = excavation length - twice the thickness of support frame 1.

[0054] As an optional implementation, a distribution box 6 is installed on the trolley body 9 .

[0055] Specifically, power is supplied through a distribution box 6 that is provided.

[0056] A construction method for dismantling and recycling existing lining of a tunnel for reconstruction and expansion, which comprises the following steps:

[0057] The trolley body 9 is driven under the existing tunnel to be excavated, and the tunnel is supported by the pressure bearing device 2;

[0058] Specifically, the trolley body 9 is first driven to a predetermined position, and the pressure-bearing device 2 is extended to press against the inner surface of the lining.

[0059] The existing lining of the tunnel is positioned and removed by the positioning and cutting mechanism;

[0060] Specifically, a laser sensing device 3 is used to locate the contact surface between the existing lining and the surrounding rock, as well as the position where the existing lining needs to be cut, and an auxiliary cutting device is used for drilling to separate the existing lining from the surrounding rock. Personnel are evacuated from the tunnel, and then the upper part is blasted and excavated to remove the slag. After the slag removal is completed, the main cutting device 4 and the auxiliary cutting device 5 are used to remove the lining segment 8.

[0061] After the lining is removed, the removed lining is transported out of the tunnel using the trolley body 9.

[0062] After the lining is removed, the recovered lining segments 8 are backfilled into the tunnel to be excavated later for backfilling, making full use of resources. The recovered lining segments 8 are used as the backfill roadbed for the expanded tunnel. The strength and stability are higher than that of the soil and rock 7, providing sufficient support for the side walls. There is no need to excavate a large amount of surrounding soil and rock 7, reducing the impact on the environment.

[0063] As an optional implementation method, before the lining is positioned and removed, a groove is drilled at the contact surface between the existing lining and the surrounding rock by using an auxiliary drilling tool to separate the two.

[0064] Specifically, before the lining is positioned and removed, auxiliary cutting equipment is used for drilling to separate the existing lining from the surrounding rock, and the lining is cut in intervals to avoid bending of the lining.

[0065] As an optional embodiment, the recycled lining is cut into strips.

[0066] Specifically, compared with soil and rock 7, the strip concrete backfill and subsequent removal process have high construction efficiency.

[0067] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0068] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion, characterized in that: include: A trolley body (9), wherein the top of the trolley body (9) is fixedly connected to a support frame (1); A plurality of pressure-bearing devices (2) are arranged at the top of the support frame (1) along the circumferential direction, and the trolley body (9) supports the top of the tunnel interior through the plurality of pressure-bearing devices (2); The positioning and cutting mechanism is arranged on the trolley body (9) and is used for positioning and removing the existing lining of the tunnel, and the removed lining is transported out of the tunnel through the trolley body (9) for recovery.

2. The trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion according to claim 1 is characterized in that: The positioning and cutting mechanism comprises: A laser sensing positioning device (3) is arranged on the trolley body (9) and is used to locate the outer contour surface of the lining and the position to be cut; A cutting device is arranged on the trolley body (9) and is used for cutting and removing the lining.

3. The trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion according to claim 2 is characterized in that: The cutting device comprises: a main cutting device (4) and an auxiliary cutting device (5), wherein the main cutting device (4) is used for cutting concrete on the lining, and the auxiliary cutting device (5) is used for cutting steel bars, steel arches, steel mesh and anchor trays on the lining.

4. The trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion according to claim 1 is characterized by: The pressure bearing device (2) is a screw jack.

5. The trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion according to claim 1 is characterized by: The support frame (1) is an arched support frame, and the support frame (1) consists of at least two frames.

6. The trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion according to claim 5, characterized in that: The distance between two adjacent frames is the excavation length minus twice the thickness of the support frame (1).

7. The trolley for dismantling and recovering existing lining of a tunnel for reconstruction and expansion according to claim 1 is characterized by: A distribution box (6) is installed on the trolley body (9).

8. A construction method for dismantling and recovering the existing lining of a tunnel for reconstruction and expansion, applicable to the trolley for dismantling and recovering the existing lining of a tunnel for reconstruction and expansion as claimed in claim 1, characterized in that: The following steps are involved: The trolley body (9) is driven into the lower part of the existing tunnel to be excavated, and the tunnel is supported by the pressure-bearing device (2); The existing lining of the tunnel is positioned and removed by the positioning and cutting mechanism; After the lining is removed, the removed lining is transported out of the tunnel using the trolley body (9).

9. The construction method for dismantling and recycling the existing lining of a tunnel reconstruction and expansion according to claim 8 is characterized by: Before positioning and removing the lining, auxiliary drilling tools are used to drill trenches at the contact surface between the existing lining and the surrounding rock to separate the two.

10. The construction method for dismantling and recycling existing lining of a tunnel reconstruction and expansion according to claim 8, characterized in that: Cut the recycled lining into strips.

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