Lining trolley and method for underground cave loading and unloading area with bracket lining section

Abstract

The invention discloses a lining trolley suitable for a lining section with a corbel in an underground cave loading and unloading area, comprising an arch trolley for arch construction and two side wall corbel trolleys arranged opposite to each other and used for single-side side wall and corbel construction, and a space for the arch trolley to pass through is reserved between the two side wall corbel trolleys, the side wall corbel trolley comprises a side wall formwork support assembly, a side wall walking assembly, a side wall lifting assembly and a side wall corbel formwork, and the arch trolley comprises an arch support assembly, an arch walking assembly, an arch lifting assembly, an arch transverse movement assembly and an arch formwork; and also discloses a lining method suitable for a lining section with a corbel in an underground cave loading and unloading area. The lining trolley is divided into a side wall corbel trolley and an arch trolley, and both the side wall corbel trolley and the arch trolley can move and work independently, thereby simplifying the structure of the lining trolley, reducing the cost, and reducing the weight during construction and movement.

Description

Technical Field

[0001] The invention belongs to the technical field of underground cavern engineering lining, and in particular relates to a lining trolley with a corbel lining section suitable for an underground cavern loading and unloading area and a method. Background Art

[0002] In the construction of underground caverns, in order to facilitate the installation of lifting machinery, a corbel concrete structure will be designed on some sections, usually in the loading and unloading area, and the designed length is not long. For the above situation, in the prior art, for the lining construction with corbel parts, a non-standard customized integral one-time formed lining trolley is used for construction. When the above method is used for construction, the lining trolley has a complex structure, and it is difficult to demould the corbel part, the overall processing cost is high, and the trolley is customized and cannot be used in underground caverns of different sizes, which makes the utilization rate of the trolley low. Summary of the invention

[0003] The present invention intends to provide a lining trolley with a corbel lining section suitable for an underground cave loading and unloading area, and adopts a split trolley, so that the entire processing and installation speed is fast, the cost is low, and it is easy to use.

[0004] To this end, the technical solution adopted by the present invention is: a lining trolley with a corbel lining section suitable for an underground cave loading and unloading area, comprising an arch trolley for arch construction and two side wall corbel trolleys arranged opposite to each other on the left and right and used for single-sided side wall and corbel construction, the side wall corbel trolley comprising a side wall formwork support assembly, the bottom of the side wall formwork support assembly is provided with a side wall walking assembly capable of driving the side wall formwork support assembly to move forward and backward and left and right, and a side wall lifting assembly for the upper and lower side wall formwork support assemblies, the side wall formwork support assembly is arranged as an upper narrow and lower wide structure, and the side close to the side wall is arranged at a right angle, a side wall corbel formwork is arranged on the right-angle side of the side wall formwork support assembly, and the upper end of the side wall corbel formwork is arranged as an opening structure for pouring;

[0005] The arch trolley includes an arch support assembly, the bottom of the arch support assembly is provided with an arch walking assembly capable of driving the arch support assembly to move forward and backward and an arch lifting assembly for lifting the arch support assembly, the arch support assembly includes an arch support frame with an upper end matching the arch and a door-type support frame with a channel left at the lower end, the bottom of the arch support frame is provided with an arch transverse movement assembly capable of driving the arch support frame to move left and right, the top of the arch support frame is provided with an arch template, the arch template includes a middle arch template and vertical side panels at both ends, the upper ends of the front and rear sides of the vertical side panels are hinged on the arch template, the lower ends of the front and rear sides of the vertical side panels are arranged on the bottom of the arch support frame through the side panel horizontal movement assembly, and the bottom of the arch support frame is located above the corbel.

[0006] As a preferred embodiment of the above scheme, an embedded bolt positioning device for installing embedded bolts is also provided, and the embedded bolts are used to install the corbel crane rails. The embedded bolt positioning device includes a positioning block that can be clamped on the upper end of the side wall corbel template from top to bottom and is horizontally arranged, and a moving block perpendicular to the positioning block is arranged on the side of the positioning block away from the side wall corbel template, and a support foot that can be inserted into the positioning block is arranged at the position of the moving block corresponding to the positioning block, and a positioning hole for passing the embedded bolt is arranged on one side of each support foot, and the positioning hole is provided with upper and lower fastening bolts that can adjust the relative height of the embedded bolt in the positioning hole and are horizontally arranged with the positioning block, and the other side of the support foot is provided with front and rear fastening bolts that can laterally adjust the position of the support foot relative to the positioning block and are vertically arranged with the positioning block.

[0007] Further preferably, the arch support assembly and the side wall formwork support assembly are both provided with stairs for people to climb, the top of the stairs are both provided with a platform for easy pouring, and the sides of the stairs and the surroundings of the platform are both provided with guardrails.

[0008] Further preferably, the side wall walking assembly and the side wall lifting assembly are arranged side by side below the bottom of the side wall formwork supporting assembly, and the side wall lifting assembly can lift the side wall walking assembly off the ground by jacking up the side wall formwork supporting assembly, and an arch track is laid on the ground of the underground cavern for the arch walking assembly to move back and forth.

[0009] Further preferably, the side wall formwork support assembly adopts a triangular support frame, the side wall walking assembly and the arch walking assembly both adopt walking wheels, and the side wall walking assembly can change the walking direction, the side wall lifting assembly adopts a jack, and the arch lifting assembly and the arch transverse movement assembly both adopt telescopic cylinders.

[0010] Also disclosed is a lining method for a lining section with a corbel in an underground cave loading and unloading area, comprising the above-mentioned lining trolley and the following steps:

[0011] S1: The side wall walking assembly drives the side wall corbel trolley to move to the construction position, and the side wall lifting assembly lifts the entire side wall corbel trolley upwards, so that the side wall corbel template reaches the designed position, and then pours concrete;

[0012] S2: After the concrete poured in S1 reaches the demoulding condition, the side wall formwork support assembly is driven down by the side wall lifting assembly, and then the side wall walking assembly drives the side wall corbel trolley to move laterally away from the side wall, so that the side wall corbel formwork leaves the concrete surface, and then the side wall walking assembly drives the side wall corbel trolley to move to the next construction position, and the construction is repeated until the construction of the side wall and corbel lining concrete is completed;

[0013] S3: When the concrete strength of the side wall corbel reaches the requirement, the entire trolley is moved to the lining position through the arch travel assembly, the arch formwork is moved to the designed position through the arch lifting assembly and the arch transverse movement assembly, the plug plate is installed on the vertical side plate, and then the concrete is poured;

[0014] S4: After the concrete poured in S3 reaches the demoulding strength, the vertical side plate is rotated away from the concrete surface through the side plate horizontal moving assembly, and then the entire arch formwork is moved away from the concrete surface through the arch lifting assembly. Then the arch walking assembly drives the arch trolley to move to the next construction position to repeat the construction until the construction of the arch lining concrete is completed.

[0015] It is further preferred that, before pouring in S1, embedded bolts are installed at positions on the corbels where the corbel crane rails need to be installed by means of embedded bolt positioning devices; in S2, the embedded bolt positioning device is first taken out upwards to allow the embedded bolts to leave the bolt positioning holes, and then the side wall formwork support assembly is lowered under the action of the side wall lifting assembly; in S4, after the arch lining concrete is completed, the corbel crane rails are installed on the embedded bolts.

[0016] Further preferably, in S1 and S3, during pouring, the concrete is vibrated by a vibrating rod or a flat vibrator, and after pouring, it is cured with a formwork.

[0017] Further preferably, in S1, two side wall bracket trolleys perform construction on both sides of the underground cavern at the same time, and in S2, when the side wall walking assembly under each side wall bracket trolley changes its moving direction, it is necessary to first lift the entire side wall bracket trolley through the side wall lifting assembly, and then change the moving direction of the side wall walking assembly.

[0018] Beneficial effects of the present invention:

[0019] 1) The lining trolley is divided into a side wall bracket trolley and an arch trolley, and the side wall bracket trolley and the arch trolley can move and work independently, thereby simplifying the structure of the lining trolley, reducing the structural complexity of the lining trolley, reducing costs, and reducing the weight during construction and movement;

[0020] 2) During construction, the two side wall corbel trolleys work first. When the concrete of the side wall corbels constructed first reaches the hardness, the arch can be constructed. At this time, the arch and the side wall above the corbels are constructed at the same time. Compared with the prior art, in which the construction of each part is first the side wall corbels and then the arch, the trolley has a simple structure and is easy to reinforce, which speeds up the concrete pouring speed, thereby significantly speeding up the construction progress and improving the construction efficiency;

[0021] 3) When the cross-sectional width of the underground cavern is sufficient, two side wall bracket trolleys are used for construction. When the cross-sectional width of the underground cavern is limited, the two side wall bracket trolleys are used for construction in a staggered manner. This allows the two side wall bracket trolleys to work simultaneously during most of the construction process, thereby further improving construction efficiency.

[0022] 4) When demoulding after the arch concrete pouring construction is completed, the vertical side plate is first rotated away from the concrete surface under the action of the side plate horizontal moving assembly, so as to effectively prevent the arch trolley from hitting the completed corbel when moving downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the side wall corbel trolley in the present invention.

[0024] Figure 2 It is a schematic diagram of the arch trolley in the present invention.

[0025] Figure 3 It is a schematic diagram of the embedded bolt positioning device in the present invention. DETAILED DESCRIPTION

[0026] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:

[0027] like Figure 1-Figure 3 As shown, a lining trolley with corbel lining sections suitable for underground cavern loading and unloading areas is mainly composed of an arch trolley and two side wall corbel trolleys arranged opposite to each other on the left and right. The side wall corbel trolley is used for the construction of side walls and corbels on one side of the underground cavern, and the arch trolley is used for the construction of the arch of the underground cavern.

[0028] The specific structure of the side wall corbel trolley is a side wall formwork support assembly 1. A side wall walking assembly 2 that can drive the side wall formwork support assembly to move forward and backward and left and right and a side wall lifting assembly 3 for moving the side wall formwork support assembly up and down are arranged at the bottom of the side wall formwork support assembly 1. In order to reduce the weight of the side wall formwork support assembly, the side wall formwork support assembly is set to a narrow upper and wide lower structure, and the side close to the side wall is set to a right angle side, and a side wall corbel template 12 is set on the right angle side of the side wall formwork support assembly. In order to facilitate pouring, the upper end of the side wall corbel template 12 is set to an open structure for pouring.

[0029] The specific structure of the arch trolley includes an arch support assembly 4, at the bottom of which are arranged an arch travel assembly 5 capable of driving the arch support assembly to move forward and backward and an arch lifting assembly 6 for lifting the arch support assembly. The arch support assembly 4 includes an arch support frame 4a whose upper end matches the arch and a door-shaped support frame 4b with a passage left at the lower end, and the bottom of the arch support frame 4a is located above the corbel. In order to ensure the left-right centering of the arch construction, an arch transverse movement assembly 7 capable of driving the arch support frame 4a to move left-right is arranged at the bottom of the arch support frame 4a, and an arch template 13 is arranged at the top of the arch support frame. The arch template 13 includes an arch template in the middle and vertical side panels at both ends, and the upper ends of the front and rear sides of the vertical side panels are hinged on the arch template, and the lower ends of the front and rear sides of the vertical side panels are arranged at the bottom of the arch support frame 4a through the side panel horizontal movement assembly. During specific configuration, the arch lifting assembly 6 may also be disposed on the arch support frame 4a, so that the arch lifting assembly 6 can directly push the arch template to move up and down.

[0030] Usually, in order to facilitate the movement of large cranes in underground caverns, a corbel crane track is installed on the corbel. In order to facilitate the installation of the corbel crane track, the embedded bolts for installing the corbel crane track are embedded in the corbel during lining, so an embedded bolt positioning device 14 for installing the embedded bolts 15 is also provided. The specific structure of the embedded bolt positioning device 14 includes a horizontally arranged positioning block 14a that can be clamped on the upper end of the side wall corbel template 12 from top to bottom, a moving block 14b perpendicular to the positioning block 14a is arranged on the side of the positioning block 14a away from the side wall corbel template 12, and a support leg 14c that can be inserted into the positioning block 14a is arranged at the position corresponding to the positioning block 14a on the moving block 14b, and a positioning hole 14d for the embedded bolt 15 to pass through is arranged on one side of each support leg 14c. In order to adjust the position of the embedded bolt, an upper and lower fastening bolt 14e is provided on the positioning hole 14d, which can adjust the relative height of the embedded bolt 15 in the positioning hole 14d and is horizontally arranged with the positioning block 14a. The other side of the support foot is provided with a front and rear fastening bolt 14f which can adjust the position of the movable plate relative to the positioning block 14a and is vertically arranged with the positioning block 14a.

[0031] When the upper and lower fastening bolts are loosened, the relative height of the embedded bolt 15 in the positioning hole 14d can be adjusted, and when the upper and lower fastening bolts are tightened, the adjusted height can be fixed. Inserting a gasket between the support leg and the positioning block can change the distance between the support leg and the positioning block, and the gasket can be inserted and fixed after insertion by turning the front and rear fastening bolts. The embedded bolt positioning device can adjust the precise position of the embedded bolt, thereby accurately controlling the installation accuracy of the embedded bolt, which can significantly improve the construction efficiency and construction quality compared to drilling holes to install the embedded bolts.

[0032] In order to facilitate pouring and provide protection during pouring, stairs 8 for people to climb are provided on the arch support assembly 4 and the side wall formwork support assembly 1, a platform 9 for easy pouring is provided at the top of the stairs 8, and guardrails 10 are provided on the sides of the stairs 8 and around the platform 9.

[0033] In order to prevent the arch trolley from moving left and right and affecting the traffic below, an arch track 11 is laid on the ground of the underground cavern for the arch walking assembly 5 to move forward and backward, so that the arch walking assembly can only move along the arch track 11. At the same time, the arch track 11 can also improve the walking efficiency of the arch trolley.

[0034] To ensure that the side wall walking assembly does not drive the trolley to move during construction, the side wall walking assembly 2 and the side wall lifting assembly 3 are arranged side by side under the bottom of the side wall formwork support assembly 1, and the side wall lifting assembly 3 can lift the side wall formwork support assembly 1 to make the side wall walking assembly 2 leave the ground, so that the side wall walking assembly can leave the ground during pouring.

[0035] In the above, the side wall formwork support assembly 1, the side wall walking assembly 2, the side wall lifting assembly 3, the arch support frame 4a, the door-type support frame 4b with a passage at the lower end, the arch walking assembly 5, the arch lifting assembly 6, the arch transverse movement assembly 7, the side wall corbel formwork 12 and the arch formwork 13 all adopt existing structures. Specifically, the side wall formwork support assembly 1 adopts a triangular support frame, the side wall walking assembly 2 adopts a universal walking wheel that can change the moving direction, the side wall lifting assembly 3 adopts a jack, the arch lifting assembly 6 and the arch transverse movement assembly 7 both adopt telescopic cylinders, the arch track adopts an I-shaped track fixed on the ground of the underground cavern in the prior art, and the side wall walking assembly 2 adopts a walking wheel with a notch matching the I-shaped track.

[0036] A lining method for a lining section with a corbel in an underground cave loading and unloading area, based on the above-mentioned lining trolley, further comprising the following steps:

[0037] The first step: install the embedded bolt positioning device 14 on the side wall corbel formwork 12, and position the embedded bolts at the designed position through the upper and lower fastening bolts 14e and the front and rear fastening bolts 14f, then drive the side wall corbel trolley to move to the construction position through the side wall walking assembly 2, and the side wall lifting assembly 3 lifts the side wall formwork support assembly 1 and the side wall corbel formwork 12 to the designed position, and finally pours concrete.

[0038] Since each side wall bracket trolley is used to construct one side of the underground cavern, in order to save time, the side walls on both sides are constructed at the same time. During pouring, the concrete is vibrated by a vibrating rod or a flat vibrator to prevent transition bubbles from being generated during pouring, thereby affecting the density of the concrete. After pouring, it is necessary to carry out formwork maintenance.

[0039] Step 2: After the concrete poured in the first step reaches the demoulding condition, loosen the upper and lower fastening bolts 14e and the front and rear fastening bolts 14f, then lift the embedded bolt positioning device upwards, and after the embedded bolts are exposed, drive the side wall formwork support assembly 1 to descend through the side wall lifting assembly 3, and then the side wall walking assembly 2 drives the side wall corbel trolley to move laterally away from the side wall, so that the side wall corbel formwork 12 leaves the concrete surface, and finally the side wall walking assembly 2 drives the side wall corbel trolley to move to the next construction position, and repeat the above work until the construction of the side wall and corbel lining concrete is completed.

[0040] Since the side wall walking assembly 2 uses walking wheels that can change the walking direction, when changing the moving direction of the side wall bracket trolley, it is necessary to first make the universal walking wheels leave the ground through the side wall lifting assembly 3, and then change the direction. After the change is completed, the universal walking wheels are put on the ground. In order to facilitate the movement of the side wall bracket trolley, a walking machine such as a loader can be used to assist the movement.

[0041] Step 3: Install the arch formwork 13 on the arch trolley. When the concrete strength of the side wall corbels reaches the requirement, move the entire trolley to the lining position through the arch walking assembly 5, move the arch formwork 13 to the designed position through the arch lifting assembly 6 and the arch transverse assembly 7, and then pour the concrete. During the pouring, vibrate the concrete with a vibrator or a flat vibrator to prevent transition bubbles from being generated during the pouring, thereby affecting the quality of the concrete. After the pouring is completed, it is necessary to carry out mold maintenance. When pouring the arch, as long as the concrete strength of the side wall corbels reaches the requirement, construction can be carried out, and there is no need to wait until all the side wall corbels are poured before proceeding.

[0042] Step 4: After the concrete poured in the third step reaches the demoulding strength, the side plate horizontal moving assembly is used to rotate the vertical side plate away from the concrete surface, and then the arch lifting assembly 6 is used to drive the entire arch trolley to descend, so that the entire arch formwork 13 leaves the concrete surface, and then the arch walking assembly 5 drives the arch trolley to move to the next construction position to repeat the construction until the construction of the arch lining concrete is completed. To facilitate the movement of the arch trolley, a loader or other walking machinery can be used to assist in the movement. The side plate horizontal moving assembly can be a telescopic cylinder or a screw nut structure. After the arch lining concrete is completed, the bracket crane track is installed on the embedded bolts 15.

Claims

1. A lining trolley with a bracket lining section suitable for underground cave loading and unloading areas, characterized in that: It comprises an arch trolley for arch construction and two side wall and corbel trolleys arranged opposite to each other on the left and right and used for the construction of a single side wall and corbel, the side wall and corbel trolley comprising a side wall formwork support assembly (1), the bottom of the side wall formwork support assembly (1) is provided with a side wall walking assembly (2) capable of driving the side wall formwork support assembly to move forward and backward and left and right, and a side wall lifting assembly (3) for driving the side wall formwork support assembly to move up and down, the side wall formwork support assembly is arranged as a structure with a narrow top and a wide bottom, and a side close to the side wall is arranged at a right angle, a side wall corbel formwork (12) is arranged on the right-angled side of the side wall formwork support assembly, and the upper end of the side wall corbel formwork (12) is arranged as an opening structure for pouring; The arch trolley comprises an arch support assembly (4), the bottom of the arch support assembly (4) is provided with an arch walking assembly (5) capable of driving the arch support assembly to move forward and backward, and an arch lifting assembly (6) for lifting the arch support assembly, the arch support assembly (4) comprises an arch support frame (4a) whose upper end matches the arch and a door-shaped support frame (4b) with a passage left at the lower end, the bottom of the arch support frame (4a) is provided with an arch transverse movement assembly (7) capable of driving the arch support frame (4a) to move left and right, the top of the arch support frame is provided with an arch template (13), the arch template (13) comprises a middle arch template and vertical side plates at both ends, the upper ends of the front and rear sides of the vertical side plates are both hinged on the arch template, the lower ends of the front and rear sides of the vertical side plates are both arranged at the bottom of the arch support frame (4a) through the side plate horizontal movement assembly, and the bottom of the arch support frame (4a) is located above the corbel; The invention is also provided with an embedded bolt positioning device (14) for installing embedded bolts (15), wherein the embedded bolts (15) are used to install the corbel crane rail, and the embedded bolt positioning device (14) comprises a horizontally arranged positioning block (14a) which can be clamped on the upper end of the side wall corbel template (12) from top to bottom, and a moving block (14b) which is perpendicular to the positioning block (14a) is arranged on a side of the positioning block (14a) away from the side wall corbel template (12), and a moving block (14b) which is perpendicular to the positioning block (14a) is arranged on the moving block (14b) at a position corresponding to the positioning block (14a). A support leg (14c) capable of being inserted into the positioning block (14a), each support leg (14c) being provided with a positioning hole (14d) on one side thereof for the embedded bolt (15) to pass through, the positioning hole (14d) being provided with an upper and lower fastening bolt (14e) capable of adjusting the relative height of the embedded bolt (15) in the positioning hole (14d) and being arranged horizontally with the positioning block (14a), and the other side of the support leg being provided with a front and rear fastening bolt (14f) capable of horizontally adjusting the position of the support leg relative to the positioning block (14a) and being arranged vertically with the positioning block (14a); The side wall walking assembly (2) and the side wall lifting assembly (3) are arranged side by side below the bottom of the side wall formwork support assembly (1), and the side wall lifting assembly (3) can lift the side wall formwork support assembly (1) to enable the side wall walking assembly (2) to leave the ground, and an arch track (11) is laid on the ground of the underground cavern for the arch walking assembly (5) to move forward and backward.

2. The lining trolley with a corbel lining section suitable for underground cave loading and unloading areas according to claim 1, characterized in that: The arch support assembly (4) and the side wall formwork support assembly (1) are both provided with stairs (8) for people to climb, the top of the stairs (8) is provided with a platform (9) for easy pouring, and the sides of the stairs (8) and the surroundings of the platform (9) are both provided with guardrails (10).

3. The lining trolley with a corbel lining section suitable for underground cave loading and unloading areas according to claim 1, characterized in that: The side wall formwork support assembly (1) adopts a triangular support frame, the side wall walking assembly (2) and the arch walking assembly (5) both adopt walking wheels, and the side wall walking assembly (2) can change the walking direction, the side wall lifting assembly (3) adopts a jack, and the arch lifting assembly (6) and the arch lateral movement assembly (7) both adopt telescopic cylinders.

4. A lining method for a lining section with a corbel in an underground cave loading and unloading area, characterized in that: The method comprises the lining trolley according to any one of claims 1 to 3 and the following steps: S1: The side wall walking assembly (2) drives the side wall bracket trolley to move to the construction position, and the side wall lifting assembly (3) lifts the entire side wall bracket trolley upwards, so that the side wall bracket formwork (12) reaches the designed position, and then pours concrete; S2: After the concrete poured in S1 reaches the demoulding condition, the side wall formwork support assembly (1) is driven to descend by the side wall lifting assembly (3), and then the side wall walking assembly (2) drives the side wall corbel trolley to move laterally away from the side wall, so that the side wall corbel formwork (12) leaves the concrete surface, and then the side wall walking assembly (2) drives the side wall corbel trolley to move to the next construction position, and the construction is repeated until the construction of the side wall and corbel lining concrete is completed; S3: When the concrete strength of the side wall bracket reaches the required level, the entire trolley is moved to the lining position by the arch travel assembly (5), the arch formwork (13) is moved to the designed position by the arch lifting assembly (6) and the arch transverse movement assembly (7), a plugging plate is installed on the vertical side plate, and then concrete is poured; S4: After the concrete poured in S3 reaches the demoulding strength, the vertical side plate is rotated away from the concrete surface by the side plate horizontal moving assembly, and then the entire arch formwork (13) is moved away from the concrete surface by the arch lifting assembly (6), and then the arch walking assembly (5) drives the arch trolley to move to the next construction position to repeat the construction until the construction of the arch lining concrete is completed; Before pouring in S1, the embedded bolts (15) are installed at the positions on the corbels where the corbel crane rails are to be installed, using the embedded bolt positioning device (14); in S2, the embedded bolt positioning device is first taken out upwards to expose the embedded bolts (15) on the concrete surface, and then the side wall formwork support assembly (1) is lowered under the action of the side wall lifting assembly (3); in S4, after the arch lining concrete is completed, the corbel crane rails are installed on the embedded bolts (15).

5. The lining method for the lining section with corbels in the loading and unloading area of ​​an underground cavern according to claim 4 is characterized in that: In S1 and S3, during pouring, the concrete is vibrated by a vibrating rod or a flat plate vibrator, and after pouring, it is cured with a formwork.

6. The lining method for the lining section with corbels in the loading and unloading area of ​​an underground cavern according to claim 4 is characterized in that: In S1, two side wall bracket trolleys simultaneously construct on both sides of the underground cavern. When the cross-sectional width of the underground cavern is sufficient, the two side wall bracket trolleys construct side by side. When the cross-sectional width of the underground cavern is limited, the two side wall bracket trolleys construct in a staggered manner. In S2, when the side wall walking assembly (2) under each side wall bracket trolley changes its moving direction, it is necessary to first lift the entire side wall bracket trolley through the side wall lifting assembly (3) before changing the moving direction of the side wall walking assembly (2).

Images