Tunnel micro-step excavation support workbench

Abstract

The utility model discloses a tunnel microstep excavation support workstation, relates to tunnel excavation support equipment technical field, including movable section steel support, movable section steel support middle is provided with first platform and second platform from top to bottom in proper order, the first platform and second platform center all are provided with the lift passageway, is provided with the lift unit on the first platform, movable section steel support both sides all are provided with the operation platform unit, the rear of operation platform unit all is provided with the ladder stand, the utility model discloses a tunnel microstep excavation support workstation can improve work efficiency, reduce up and down step construction interference, and realize quick closed loop, be favorable to the control surrounding rock deformation.

Description

Technical Field

[0001] This utility model relates to the technical field of tunnel excavation and support equipment, and in particular to a tunnel micro-step excavation and support workbench. Background Technology

[0002] With the rapid development of tunnel construction technology, the efficiency and safety of tunnel excavation and support are receiving increasing attention. Among these, simultaneous excavation and support of two tunnel benches has become a new research topic. Traditional two-bench construction methods for tunnel cross-sections are inefficient, subject to significant construction interference, and pose high safety risks due to their long construction time. While the upper and lower benches are operated simultaneously, significant interference exists between them. For example, muck removal operations on the upper bench may affect the construction progress of the lower bench, especially in short-bench methods, where this interference is more pronounced. This not only reduces construction efficiency but may also complicate construction organization and increase management difficulty. Two-bench construction requires step-by-step excavation, leading to repeated disturbances of the surrounding rock. Each excavation and support operation affects the stability of the surrounding rock, especially in weak rock formations. This disturbance can trigger deformation or even collapse, and frequent disturbances may prolong support closure time, further increasing construction risks.

[0003] While the traditional two-stage tunnel construction method offers flexibility, its limitations in equipment configuration and construction process lead to low efficiency, high safety risks, and poor adaptability to complex geological conditions. These shortcomings have spurred the development of modern tunnel construction towards mechanization and intelligentization, such as the use of double-arm drilling rigs and arch frame installation machines, to reduce manual intervention and improve construction efficiency and safety. Utility Model Content

[0004] The purpose of this utility model is to provide a tunnel micro-step excavation and support work platform. The micro-step excavation and support work platform has good integrity and high strength, which can solve the technical problems of simultaneous excavation, blasting, muck removal and support of upper and lower steps on the tunnel cross section, improve work efficiency, reduce construction interference between upper and lower steps, and can quickly close into a ring, which is beneficial to control the deformation of the surrounding rock.

[0005] To achieve the above objectives, this utility model provides a tunnel micro-step excavation support work platform, including a movable steel support frame. The movable steel support frame has a first platform and a second platform arranged sequentially from top to bottom in the middle. Both the first platform and the second platform have a lifting channel at their center. The first platform has a lifting unit. Both sides of the movable steel support frame have working platform units, and each working platform unit has a ladder at its rear.

[0006] Preferably, the movable steel support includes several first longitudinal columns and second longitudinal columns. The top of the first longitudinal column is connected to the four corners of the bottom surface of the first platform, the bottom of the first longitudinal column is connected to the four corners of the top surface of the second platform, the top of the second longitudinal column is connected to the four corners of the bottom surface of the second platform, and each of the second longitudinal columns is equipped with casters at the bottom.

[0007] Preferably, the front and rear sides of the upper surface of the first platform are provided with first reinforcing ribs, the front and rear sides of the lower surface of the second platform are provided with second reinforcing ribs, the first reinforcing ribs and the second reinforcing ribs are provided with symmetrically distributed U-shaped steel fasteners, the first longitudinal support column and the bottom surface of the first platform are provided with first diagonal reinforcing ribs, and the second longitudinal support column and the bottom surface of the second platform are provided with second diagonal reinforcing ribs.

[0008] Preferably, the lifting unit includes a tripod, a balance block is provided on the top of the tripod, a hook is provided at the middle of the bottom of the balance block, a detachable lifting mechanism is provided on the hook, and a fixing groove is provided at the bottom of the tripod corresponding to the first platform.

[0009] Preferably, the work platform unit includes a first work platform, a second work platform, and a third work platform arranged sequentially from top to bottom. The first work platform is arranged on the left and right sides of the first platform, the second work platform is arranged on the left and right sides of the second platform, and the third work platform is arranged between the second longitudinal supports.

[0010] Preferably, one end of the first support rib is provided on both sides of the first working platform, and the other end of the first support rib is connected to the first longitudinal column. The second working platform and the third working platform are respectively provided on both sides with a second support rib and a third support rib. The other end of the second support rib is connected to the upper half of the second longitudinal column, and the other end of the third support rib is connected to the lower half of the second longitudinal column.

[0011] Preferably, the first work platform, the second work platform, and the third work platform are configured in a stepped manner.

[0012] Therefore, the tunnel micro-step excavation support workbench of this utility model, which adopts the above-mentioned structure, has the following beneficial effects compared with the prior art:

[0013] 1. This utility model creates a three-dimensional work space, which allows different types of work or different processes of the same type of work to be carried out simultaneously or sequentially on different platforms, reducing the up-and-down movement of workers and improving overall work efficiency.

[0014] 2. This utility model can solve the technical problem of simultaneously excavating and blasting, removing slag, and providing support on the upper and lower steps of a tunnel cross section, thereby improving work efficiency;

[0015] 3. Compared with traditional simple scaffolding or working directly on the excavation surface, this utility model provides a more stable and flat working platform, improves the working environment for workers, and provides workers with a safe and convenient working platform.

[0016] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a front view of an embodiment of a tunnel micro-step excavation support workbench according to the present invention;

[0018] Figure 2 This is a three-axis view of an embodiment of a tunnel micro-step excavation support workbench according to the present invention; reference numerals are shown in the figures.

[0019] 1. Mobile steel frame; 2. First platform; 3. Second platform; 4. Lifting channel; 5. Lifting unit; 6. Working platform unit; 7. Ladder; 11. First longitudinal support; 12. Second longitudinal support; 13. Casters; 14. First reinforcing rib; 15. Second reinforcing rib; 16. U-shaped steel fastener; 17. First diagonal reinforcing rib; 18. Second diagonal reinforcing rib; 51. Tripod; 52. Balance weight; 53. Hook; 54. Fixing groove; 61. First working platform; 62. Second working platform; 63. Third working platform; 64. First support rib; 65. Second support rib; 66. Third support rib. Detailed Implementation

[0020] Example

[0021] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] like Figures 1-2As shown, the present invention discloses a tunnel micro-step excavation support work platform, including a movable steel support 1. A first platform 2 and a second platform 3 are arranged sequentially from top to bottom in the middle of the movable steel support 1. A lifting channel 4 is provided at the center of both the first platform 2 and the second platform 3. A lifting unit 5 is provided on the first platform 2. Working platform units 6 are provided on both sides of the movable steel support 1. A ladder 7 is provided at the rear of each working platform unit 6.

[0023] The mobile steel support includes several first longitudinal columns 11 and second longitudinal columns 12. The top of the first longitudinal column 11 is connected to the four corners of the bottom surface of the first platform 2, and the bottom of the first longitudinal column 11 is connected to the four corners of the top surface of the second platform 3. The top of the second longitudinal column 12 is connected to the four corners of the bottom surface of the second platform 3. The bottom of each second longitudinal column 12 is equipped with casters 13. The casters 13 on the bottom of the second longitudinal column 12 make the entire support easy to move in the tunnel to adapt to the operation requirements of different excavation or support sections and reduce the workload of building and dismantling temporary scaffolding.

[0024] First reinforcing ribs 14 are provided on the front and rear sides of the upper surface of the first platform 2, and second reinforcing ribs 15 are provided on the front and rear sides of the lower surface of the second platform 3. U-shaped steel fasteners 16 are symmetrically distributed on the first reinforcing ribs 14 and the second reinforcing ribs 15. First diagonal reinforcing ribs 17 are provided between the first longitudinal support 11 and the bottom surface of the first platform 2, and second diagonal reinforcing ribs 18 are provided between the second longitudinal support 12 and the bottom surface of the second platform 3. Using structural steel as the main structure, it has high strength. With the first reinforcing ribs 14, the second reinforcing ribs 15, the first diagonal reinforcing ribs 17, and the second diagonal reinforcing ribs 18, the lateral and longitudinal stiffness of the entire platform is greatly enhanced, the resistance to deformation is improved, and the structural stability is ensured when bearing workers and materials.

[0025] The lifting unit 5 includes a tripod 51, with a balance block 52 on the top of the tripod 51 and a hook 53 at the bottom center of the balance block 52. A detachable lifting mechanism is installed on the hook 53. The bottom of the tripod 51 and the corresponding places on the first platform 2 are provided with fixing slots 54. The lifting channel 4 in the center facilitates the vertical transportation of materials and personnel. The lifting unit 5 provides flexible vertical operation capabilities, which can easily lift tools and materials to the required height, and can even support short-distance lifting of small equipment, adapting to the complex and ever-changing operation needs in the tunnel.

[0026] The work platform unit 6 includes a first work platform 61, a second work platform 62 and a third work platform 63 arranged sequentially from top to bottom. The first work platform 61 is located on the left and right sides of the first platform 2, the second work platform 62 is located on the left and right sides of the second platform 3, and the third work platform 63 is located between the second longitudinal support columns 12.

[0027] The first working platform 61 has one end of the first support rib 64 on both sides, and the other end of the first support rib 64 is connected to the first longitudinal support column 11. The second working platform 62 and the third working platform 63 have the second support rib 65 and the third support rib 66 on both sides respectively. The other end of the second support rib 65 is connected to the upper part of the second longitudinal support column 12, and the other end of the third support rib 66 is connected to the lower part of the second longitudinal support column 12. Each working platform is firmly connected to the longitudinal support column through the support ribs to ensure that the platform will not shake or deform when bearing load.

[0028] The first work platform 61, the second work platform 62, and the third work platform 63 are configured in a stepped manner.

[0029] Therefore, the tunnel micro-step excavation and support workbench of this utility model with the above-mentioned structure can solve the technical problem of simultaneous excavation, blasting, slag removal and support of the upper and lower steps on the tunnel cross section. It has good integrity and high strength, improves work efficiency, reduces construction interference between the upper and lower steps, and can quickly close into a ring, which is beneficial to controlling the deformation of the surrounding rock.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A bench for tunnel micro-step excavation support, characterized in that: The device includes a mobile steel frame, in which a first platform and a second platform are arranged sequentially from top to bottom in the middle. A lifting channel is provided at the center of both the first and second platforms. A lifting unit is provided on the first platform. Working platform units are provided on both sides of the mobile steel frame, and ladders are provided at the rear of each working platform unit.

2. A bench for tunnel micro-step excavation and support according to claim 1, characterized in that: The movable steel support includes several first longitudinal columns and second longitudinal columns. The top of the first longitudinal column is connected to the four corners of the bottom surface of the first platform, the bottom of the first longitudinal column is connected to the four corners of the top surface of the second platform, and the top of the second longitudinal column is connected to the four corners of the bottom surface of the second platform. The bottom of each second longitudinal column is equipped with casters.

3. A bench for tunnel micro-step excavation and support according to claim 2, characterized in that: The first platform has a first reinforcing rib on both the front and rear sides of its upper surface, and the second platform has a second reinforcing rib on both the front and rear sides of its lower surface. Both the first and second reinforcing ribs have symmetrically distributed U-shaped steel fasteners. The first longitudinal support and the bottom surface of the first platform each have a first diagonal reinforcing rib, and the second longitudinal support and the bottom surface of the second platform each have a second diagonal reinforcing rib.

4. A bench for tunnel micro-step excavation and support according to claim 3, characterized in that: The lifting unit includes a tripod, a balance block is provided on the top of the tripod, a hook is provided at the middle of the bottom of the balance block, a detachable lifting mechanism is provided on the hook, and a fixing groove is provided at the bottom of the tripod corresponding to the first platform.

5. A bench for tunnel micro-step excavation and support according to claim 4, characterized in that: The work platform unit includes a first work platform, a second work platform, and a third work platform arranged sequentially from top to bottom. The first work platform is located on the left and right sides of the first platform, the second work platform is located on the left and right sides of the second platform, and the third work platform is located between the second longitudinal supports.

6. A bench for tunnel micro-step excavation and support according to claim 5, characterized in that: The first working platform has a first support rib on each side, and the other end of the first support rib is connected to the first longitudinal column. The second working platform and the third working platform have a second support rib and a third support rib on each side, respectively. The other end of the second support rib is connected to the upper part of the second longitudinal column, and the other end of the third support rib is connected to the lower part of the second longitudinal column.

7. A bench for tunnel micro-step excavation and support according to claim 6, characterized in that: The first work platform, the second work platform, and the third work platform are configured in a stepped manner.

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