Transportation supporting platform for steel arches with medium and small sections

Abstract

A transporting and supporting platform for small and medium section steel arches comprises a transporting vehicle, a hydraulic lifting device, a supporting frame, a fine adjustment supporting device, the steel arches and meshes, the hydraulic lifting device is arranged on the transporting vehicle, the supporting frame is connected with the hydraulic lifting device, and the supporting frame is driven by the hydraulic lifting device to ascend and descend. The fine adjustment supporting device is arranged on the supporting frame, the fine adjustment supporting device comprises a fine adjustment structure and a steel arch supporting groove formed in the fine adjustment structure, the upper, lower, left and right positions and the horizontal angle of the steel arch supporting groove can be adjusted through the fine adjustment structure, and the steel arch is arranged on the steel arch supporting groove; and the meshes are arranged on the steel arches to form an umbrella-shaped protective structure. The platform is suitable for excavation supporting construction of tunnels with medium and small sections, in-tunnel transportation of steel arches can be achieved, the primary supporting construction efficiency is improved, and the construction safety of operators in the tunnel is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel steel arch construction, in particular to a transportation and support platform for steel arch in medium and small cross-sections. Background Technique

[0002] After the tunneling excavation is completed, initial support is required to make the surrounding rock enter a stable state through support. Steel arch support is of great significance for the stability and safety of the tunnel.

[0003] In the current existing technology, the steel arch is mainly transported and installed manually. The bending section steel arch and the column steel arches on both sides are prefabricated in a steel bar processing factory by workers and then transported into the tunnel in sections for assembly. After being lifted by manpower, they are fixed. Multiple workers need to cooperate with each other, and the construction speed is slow. In addition, in order to protect the safety of workers, a protective support is usually set on the top. Workers need to complete the installation of the steel arch under the protective support. However, for medium and small cross-section tunnels, after setting the protective support on the top, there is not enough space for the installation of components. Therefore, this method is not applicable to the protection during the excavation and support of medium and small cross-section tunnels. Content of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a transportation and support platform for steel arch in medium and small cross-sections. The platform is applicable to the construction of excavation and support of medium and small cross-section tunnels, can realize the in-tunnel transportation of the steel arch, improve the construction efficiency of initial support, and ensure the construction safety of in-tunnel workers.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows: A transportation and support platform for steel arch in medium and small cross-sections, including a transport vehicle, a hydraulic lifting device, a support frame, a fine-tuning support device, a steel arch and a mesh. The hydraulic lifting device is arranged on the transport vehicle, the support frame is connected with the hydraulic lifting device, and the support frame is driven by the hydraulic lifting device to lift. The fine-tuning support device is arranged on the support frame. The fine-tuning support device includes a fine-tuning structure and a steel arch support groove arranged on the fine-tuning structure. The up-down, left-right positions and horizontal angle of the steel arch support groove can be adjusted through the fine-tuning structure. The steel arch is arranged on the steel arch support groove, and the mesh is arranged on the steel arch to form an umbrella-shaped protection structure.

[0006] As a further improvement of the utility model, the support frame includes cross bars arranged on the left and right sides, and the fine-tuning support device is arranged between the cross bars on the left and right sides.

[0007] As a further improvement of the present utility model, the fine-tuning structure includes a guide rail and a sliding seat. The steel arch support groove is arranged on the sliding seat. The guide rail is arranged between the cross bars on the left and right sides. The steel arch support groove is arranged on the sliding seat. A pulley is arranged on the sliding seat, and the sliding seat is arranged on the guide rail through the pulley and can slide left and right.

[0008] As a further improvement of the present utility model, a first bearing is arranged on the sliding seat. The fine-tuning structure further includes a left and right fine-tuning screw rod. The left and right fine-tuning screw rod is horizontally penetrated through one of the cross bars by threads and connected to the first bearing of the sliding seat. By rotating the left and right fine-tuning screw rod, the sliding seat is driven to slide left and right.

[0009] As a further improvement of the present utility model, a second bearing is arranged on the steel arch support groove. The steel arch support groove can rotate horizontally along the second bearing. The fine-tuning structure further includes an up and down fine-tuning screw rod. The up and down fine-tuning screw rod is vertically penetrated through the sliding seat by threads and connected to the second bearing of the steel arch support groove. By rotating the up and down fine-tuning screw rod, the steel arch support groove is driven to move up and down.

[0010] As a further improvement of the present utility model, at least three mounting positions with different spacings are arranged on the cross bar, and the fine-tuning support device is mounted on any mounting position with adjustable position.

[0011] As a further improvement of the present utility model, at least two fine-tuning support devices are provided, and at least two fine-tuning support devices are arranged at intervals along the length direction of the cross bar.

[0012] As a further improvement of the present utility model, the hydraulic lifting device includes a hydraulic station, a hydraulic column and a control electric box. The control electric box is electrically connected to the hydraulic station. The hydraulic station is connected to the hydraulic column through a pipeline. One end of the hydraulic column is fixed on the transport vehicle, and the other end is connected to the support frame.

[0013] As a further improvement of the present utility model, four hydraulic columns are provided. The four hydraulic columns are respectively connected to the four corner positions of the support frame. The connection points of the hydraulic columns and the support frame are arranged as hinge structures, and the support frame can swing left and right along the connection points through the hinge structures.

[0014] The beneficial effects of the present utility model are as follows: In the present utility model, the steel arch can be installed on the fine-tuning support device, and the steel arch is transported into the tunnel by a transport vehicle, thereby greatly reducing the labor cost of the steel arch and improving the transport efficiency. A hydraulic lifting device is arranged on the platform. When the steel arch is transported to the construction position, the hydraulic lifting device is used to lift the steel arch to the installation height, and with the support of the hydraulic lifting device, the steel arch and the mesh are used as the support structure to ensure the construction safety of the operators. This support structure uses the steel arch itself and the mesh for support, without the need to set up a protective bracket at the top of the tunnel, thus not affecting the normal construction of the steel arch, having low requirements for the construction space, and being applicable to the construction of steel arches in small and medium-sized cross-section tunnels. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the platform described in the present utility model;

[0016] Figure 2 It is a schematic diagram of the connection structure of the hydraulic lifting device, the support frame and the fine-tuning support device described in the present utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the fine-tuning support device described in the present utility model;

[0018] Marking description: transport vehicle 1, hydraulic lifting device 2, hydraulic station 21, hydraulic column 22, control electric box 23, support frame 3, cross bar 31, installation position 32, fine-tuning support device 4, steel arch support groove 41, guide rail 42, sliding seat 43, pulley 431, first bearing 432, second bearing 433, left and right fine-tuning screw 44, up and down fine-tuning screw 45, steel arch 5, mesh 6 DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present utility model will be further described below in conjunction with specific embodiments and the accompanying drawings.

[0020] As Figures 1-3 shown, a transport and support platform for steel arches in small and medium-sized cross-sections includes a transport vehicle 1, a hydraulic lifting device 2, a support frame 3, a fine-tuning support device 4, a steel arch 5 and a mesh 6.

[0021] The hydraulic lifting device 2 is arranged on the transport vehicle 1. Specifically, the hydraulic lifting device 2 includes a hydraulic station 21, a hydraulic column 22 and a control electric box 23. The control electric box 23 is electrically connected to the hydraulic station 21, the hydraulic station 21 is connected to the hydraulic column 22 through pipelines, one end of the hydraulic column 22 is fixed on the transport vehicle 1, and the other end is connected to the support frame 3.

[0022] The hydraulic station 21 is used to provide hydraulic oil, and the power system of the hydraulic station 21 realizes the conversion of the mechanical energy of the motor into pressure energy. There are four hydraulic columns 22, and the four hydraulic columns 22 are respectively connected to the four corner positions of the support frame 3. The connection points of the hydraulic columns 22 and the support frame 3 are set as hinge structures, so that the support frame 3 can swing left and right along the connection points. That is, by controlling the lifting stroke of the hydraulic columns 22, the left and right side angles of the support frame 3 can be controlled. The control electric box 23 includes a solenoid valve and a wireless remote control device, and can control the on-off of the solenoid valve wirelessly. By the on-off of the solenoid valve, the on-off or flow direction of the hydraulic oil can be controlled to realize the lifting of the hydraulic columns 22.

[0023] The support frame 3 is connected to the hydraulic columns 22 of the hydraulic lifting device 2, and the lifting of the support frame 3 is realized by the lifting of the hydraulic columns 22. The support frame 3 is composed of I-beams, channel steels, square tubes and cross bars 31. Among them, there are two cross bars 31, and the two cross bars 31 are parallel and arranged on the left and right sides. There are at least two fine-tuning support devices 4, and at least two fine-tuning support devices 4 are arranged between the two cross bars 31 and are spaced along the length direction of the cross bars 31. Considering that the engineering excavation categories are mostly Class IV and Class V, where Class V includes Class V-1 and Class V-2, the I-beam spacings for Class IV, Class V-1, and Class V-2 are 1.2 m, 1 m, and 0.6 m respectively during combined support. To ensure the arch frame spacing during construction, installation positions 32 are set at the corresponding positions of 1.2 m, 1 m, and 0.6 m on the cross bars 31, and the fine-tuning support devices 4 are adjustably installed on the corresponding installation positions 32 to control the installation spacing of the steel arch frame 5. In addition, in addition to the above optional installation positions 32, some fine-tuning support devices 4 are also installed in fixed positions.

[0024] The fine-tuning support device 4 is used to install the steel arch frame 5 and fine-tune the position of the steel arch frame 5. The fine-tuning support device 4 includes a fine-tuning structure and a steel arch frame support groove 41 arranged on the fine-tuning structure. The up, down, left, right positions and horizontal angle of the steel arch frame support groove 41 can be adjusted through the fine-tuning structure.

[0025] Specifically, the fine-tuning structure includes a guide rail 42, a sliding seat 43, left and right fine-tuning screws 44, and an up and down fine-tuning screw 45. The steel arch support groove 41 is arranged on the sliding seat 43. The guide rail 42 is arranged between the cross bars 31 on the left and right sides. The steel arch support groove 41 is arranged on the sliding seat 43. A pulley 431 is arranged on the sliding seat 43. The sliding seat 43 is arranged on the guide rail 42 through the pulley 431 and can slide left and right. A first bearing 432 is arranged on the sliding seat 43. The left and right fine-tuning screws 44 are horizontally threaded through one of the cross bars 31 and connected to the first bearing 432 of the sliding seat 43. By rotating the left and right fine-tuning screws 44, the sliding seat 43 is driven to slide left and right to realize the left and right adjustment of the steel arch 5. A second bearing 433 is arranged on the steel arch support groove 41. The steel arch support groove 41 can rotate horizontally along the second bearing 433 to realize the horizontal angle adjustment of the steel arch 5. The up and down fine-tuning screw 45 is vertically threaded through the sliding seat 43 and connected to the second bearing 433 of the steel arch support groove 41. By rotating the up and down fine-tuning screw 45, the steel arch support groove 41 is driven to move up and down to realize the up and down adjustment of the steel arch 5.

[0026] The steel arch support groove 41 is used to install the steel arch 5. The cross section of the steel arch support groove 41 is of a concave structure, with openings on both the left and right sides, and the width is adapted to the width of the steel arch 5. The steel arch 5 is hoisted onto the steel arch support groove 41 by a gantry crane. The mesh 6 uses a steel bar mesh 6, and the mesh 6 is laid on the steel arch 5 to form an umbrella-shaped protective structure.

[0027] The steps for transporting and constructing the support of the steel arch 5 through the above steel arch transportation and support platform are as follows:

[0028] 1. Hoist and transport the bent arch section of the steel arch 5 and the mesh 6: Precast the bent arch section of the steel arch 5 and the steel bar mesh 6 in the steel bar processing factory. Use the gantry crane in the steel bar processing factory to hoist the steel arch 5 onto the steel arch support groove 41 of the steel arch transportation and support platform, and hoist and tie the mesh 6 to the steel arch 5 so that the steel arch 5 and the mesh 6 jointly form an umbrella-shaped protective structure. After the hoisting is completed, transport it to the exposed surrounding rock where support is required by the transport vehicle 1.

[0029] 2. Adjust the height of the umbrella-shaped protective structure by the hydraulic lifting device 2: After the umbrella-shaped protective structure formed by the bent arch section of the steel arch 5 and the steel bar mesh 6 is transported to the designated position, control the hydraulic lifting device 2 to lift the umbrella-shaped protective structure to the erection height of the roof rock surface.

[0030] 3. Fine-tune the support device 4 to adjust the axis position of the umbrella-shaped protective structure: After the umbrella-shaped protective structure is lifted to the erection height, adjust the axis position of the umbrella-shaped protective structure through the left and right fine-tuning screws 44 and the up and down fine-tuning screw 45 of the fine-tuning structure to ensure that the support position of the steel arch 5 meets the requirements of the design specifications.

[0031] 4. Overall Erection Assembly: After the steel arch frame 5 and the steel mesh 6 are adjusted to the designated positions, they are connected to the columns of the steel arch frame 5 in the tunnel through bolts. After the overall connection and support of the steel arch frame 5 are completed, the construction of the steel mesh 6 and bolts on both side walls is carried out.

[0032] The effects that the above solutions can achieve are as follows:

[0033] 1. Low requirements for construction space. This steel arch frame transportation and support platform uses the steel arch frame 5 and the mesh 6 for support, without the need to set up protective brackets at the top of the tunnel, thus not affecting the normal construction of the steel arch frame 5. It has low requirements for construction space and can be applied to the construction of the steel arch frame 5 in small and medium cross-section tunnels.

[0034] 2. Convenient installation and disassembly. This steel arch frame transportation and support platform has a high degree of mechanization, flexible operation, convenient movement, rapid mobility, simple structure, easy installation, and the materials can be commonly used building materials at the construction site, which are easy to obtain. It is also very convenient to disassemble after construction and easy to repair in case of failure.

[0035] 3. Economical and efficient. This steel arch frame transportation and support platform effectively replaces the method that relies entirely on a large amount of manpower for the construction of small and medium cross-section tunnels, and can save a large amount of labor costs. After the steel arch frame 5 is prefabricated outside the tunnel, it is hoisted onto this steel arch frame transportation and support platform by a gantry crane and then transported directly under the bare rock for construction. During construction, the rapid assembly of the steel arch frame 5 can be realized, and the initial support construction can be quickly achieved, greatly saving the output of manpower and material resources, thereby improving the work efficiency of the initial support construction of small and medium cross-section tunnels and saving construction costs.

[0036] 4. High safety level. When the construction workers install the steel arch frame 5, the umbrella-shaped protective structure formed by the steel arch frame 5 and the mesh 6 can block the falling blocks or stones that pose a great threat to the construction workers in the tunnel. The construction workers can carry out subsequent work such as erecting the vertical steel arch frame 5, tying the steel mesh 6 on both sides, and bolt construction under the protection, so as to complete the erection stage of the initial support on the premise of ensuring safety.

[0037] 5. Strong applicability. This steel arch frame transportation and support platform is provided with multiple different installation positions 32 on the cross bar 31, and the installation spacing of the arch frame is controlled by adjusting the installation position 32 of the fine-tuning support device 4. It is very convenient to support the steel arch frame 5, effectively solving the problem that it is difficult to control the spacing of the steel arch frame 5.

[0038] 6. Ensure construction quality. Considering that there is a deviation between the parking position of the entire transport vehicle 1 and the tunnel axis, this steel arch frame transportation and support platform is provided with a fine-tuning structure that can adjust the steel arch frame 5 left and right, up and down, and horizontally, so that the steel arch frame 5 meets the installation position requirements, thereby ensuring construction quality.

[0039] The above-described embodiments are only used to conveniently illustrate the present utility model. Any person with ordinary knowledge in the relevant technical field, without departing from the technical features of the present utility model, makes equivalent embodiments with partial modifications or decorations using the technical content disclosed in the present utility model, and without departing from the technical feature content of the present utility model, still falls within the scope of the technical features of the present utility model.

Claims

1. A transportation and support platform for medium and small-section steel arch frames, characterized in that: It includes a transport vehicle, a hydraulic lifting device, a support frame, a fine adjustment support device, a steel arch and a mesh. The hydraulic lifting device is arranged on the transport vehicle, and the support frame is connected to the hydraulic lifting device. The support frame is driven by the hydraulic lifting device to lift and lower. The fine adjustment support device is arranged on the support frame. The fine adjustment support device includes a fine adjustment structure and a steel arch support groove arranged on the fine adjustment structure. The up, down, left, right positions and horizontal angle of the steel arch support groove can be adjusted through the fine adjustment structure. The steel arch is arranged on the steel arch support groove, and the mesh is arranged on the steel arch to form an umbrella-shaped protection structure.

2. The transport and support platform for medium and small cross-section steel arch frames according to claim 1, wherein: The support frame includes cross bars arranged on the left and right sides, and the fine adjustment support device is arranged between the cross bars on the left and right sides.

3. A transportation and support platform for medium and small cross-section steel arch frames according to claim 2, characterized in that: The fine adjustment structure includes guide rails and sliding seats. The guide rails are arranged between the cross bars on the left and right sides. The steel arch support groove is arranged on the sliding seat. Pulleys are arranged on the sliding seat, and the sliding seat is slidably arranged on the guide rails through the pulleys and can slide left and right.

4. A transportation and support platform for medium and small cross-section steel arch frames according to claim 3, characterized in that: A first bearing is arranged on the sliding seat. The fine adjustment structure further includes a left and right fine adjustment screw rod. The left and right fine adjustment screw rod is horizontally inserted through one of the cross bars by threads and connected to the first bearing of the sliding seat. The sliding seat is driven to slide left and right by rotating the left and right fine adjustment screw rod.

5. A transportation and support platform for medium and small cross-section steel arch frames according to claim 3, characterized in that: A second bearing is arranged on the steel arch support groove. The steel arch support groove can rotate horizontally along the second bearing. The fine adjustment structure further includes an up and down fine adjustment screw rod. The up and down fine adjustment screw rod is vertically inserted through the sliding seat by threads and connected to the second bearing of the steel arch support groove. The steel arch support groove is driven to move up and down by rotating the up and down fine adjustment screw rod.

6. The medium and small cross-section steel arch transportation and support platform according to claim 2, characterized in that: At least three installation positions with different spacings are arranged on the cross bars, and the fine adjustment support device is adjustably installed at any installation position.

7. The transport and support platform for medium and small cross-section steel arch frames according to claim 2, wherein: At least two fine adjustment support devices are arranged, and at least two fine adjustment support devices are arranged at intervals along the length direction of the cross bar.

8. A transportation and support platform for medium and small cross-section steel arch frames according to claim 1, characterized in that: The hydraulic lifting device includes a hydraulic station, a hydraulic column and a control electric box. The control electric box is electrically connected to the hydraulic station. The hydraulic station is connected to the hydraulic column through a pipeline. One end of the hydraulic column is fixed on the transport vehicle, and the other end is connected to the support frame.

9. The transport and support platform for medium and small cross-section steel arch frames according to claim 8, characterized in that: Four hydraulic columns are arranged. The four hydraulic columns are respectively connected to the four corner positions of the support frame. The connection points of the hydraulic columns and the support frame are set as hinge structures, and the support frame can swing left and right along the connection points through the hinge structures.

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