Tunnel foundation pit supporting structure for tunnel construction

Abstract

The utility model relates to the technical field of tunnel foundation pits, in particular to a tunnel foundation pit supporting structure for tunnel construction, which comprises four supporting square tubes, a supporting column is slidably connected in each supporting square tube, and one side of the bottom end of each supporting square tube is fixedly connected with a hydraulic cylinder. The supporting device has the advantages that the four arc-shaped supporting beams are connected through the limiting shafts, then an arc-shaped supporting structure is formed, installation positions can be conveniently provided for the arc-shaped supporting plates, the interior of a tunnel foundation pit is stably supported, the four supporting square pipes and the four supporting columns are provided, and the supporting effect is good. The two cross beams are fixedly connected with the top ends of the four supporting columns, meanwhile, the output ends of the four hydraulic cylinders are fixedly connected with the side faces of the four supporting columns, the two cross beams are pushed to vertically move through the extension action of the four hydraulic cylinders, the installation position of the arc-shaped supporting plate is conveniently adjusted, and the requirement for supporting the interiors of tunnels with different heights is met; therefore, the problems in the prior art are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel foundation pits, in particular to a tunnel foundation pit supporting structure for tunnel construction. Background Art

[0002] Subway is a fast, high-capacity, electric-powered rail transit system built in cities. Trains run on fully enclosed lines. Lines in the central city are basically built in underground tunnels, while lines outside the central city are generally built on viaducts or on the ground.

[0003] After the tunnel is excavated, the inside of the tunnel needs to be made, which reduces the safety of tunnel construction. The existing mechanism is to fix the frame inside the tunnel by using fixing bolts, and then support the inside of the tunnel through the frame. However, during tunnel construction, construction workers may increase the height of the inside of the tunnel according to the progress of tunnel construction, but the existing support mechanism is fixed to the inner wall of the tunnel, and thus cannot be adjusted according to the height of the tunnel, which reduces the practicality of the device. Based on this, a tunnel foundation pit support structure for tunnel construction is proposed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a tunnel foundation pit support structure for tunnel construction, which effectively solves the deficiencies of the prior art.

[0005] In order to achieve the above-mentioned purpose, an embodiment of the utility model on one hand provides a tunnel foundation pit support structure for tunnel construction, comprising four supporting square tubes, each of which is slidably connected to a supporting column, one side of the bottom end of the four supporting square tubes is fixedly connected to a hydraulic cylinder, the output ends of the four hydraulic cylinders are respectively fixedly connected to one side of the four supporting columns, the top ends of the four supporting columns are fixedly connected to two cross beams, both ends of the two cross beams are rotatably connected to an arc-shaped support beam, the ends of the two arc-shaped support beams are provided with mounting grooves, one end of the other two arc-shaped support beams are respectively slidably connected to the two mounting grooves, one side of the two arc-shaped support beams is provided with multiple limit shafts, and the top surfaces of the four arc-shaped support beams are provided with arc-shaped support plates.

[0006] Preferably, one side of the four supporting square tubes is provided with a through groove, and the sides of the four supporting square tubes close to each other are provided with a limiting socket, and a support beam is provided between two adjacent limiting sockets. By using this scheme, it is convenient to stabilize the relative positions of the two supporting square tubes. At the same time, the side surfaces of the four limiting sockets are designed in a stepped shape, and the two ends of the two supporting beams are designed in a stepped shape, which facilitates the early installation and the later disassembly.

[0007] Preferably, any of the above schemes is that both ends of the two beams are fixedly connected to the top ends of the four support columns by welding. By using this scheme, it is convenient to stably connect the two support columns to the two ends of a beam, and then it is convenient to limit the position of the beam. At the same time, the beam provides an installation position for the two arc-shaped support beams, and then multiple beams, two support columns and two supporting square tubes are combined into a support structure, and then multiple support structures are set up, so as to facilitate the support of the interior of the tunnel foundation pit.

[0008] Preferably, any of the above schemes is that two motors are fixedly connected to the middle parts of the top surfaces of the two beams, the output ends of the four motors are fixedly connected to screw rods, the two sides of the top surfaces of the two beams are fixedly connected to guide rails, the insides of the four guide rails are slidably connected to sliding blocks, the four sliding blocks are respectively threadedly connected to the four screw rods, and rotatable support rods are provided on the top surfaces of the four sliding blocks and the middle parts of the four arc-shaped support beams. This scheme facilitates the operation of the motor to drive the sliding blocks to move along the guide rails, drive the arc-shaped support beams to rotate through the support rods, and change the relative positions of the arc-shaped support beams.

[0009] Preferably, any of the above schemes has the outer circular surfaces of the four arc-shaped support beams fixedly connected with raised blocks, and the top surfaces of the four raised blocks are in contact with both sides of the arc-shaped support plate. By using this scheme, it is convenient to provide an installation position for the arc-shaped support plate, thereby facilitating stable support of the arc-shaped support cross plate, and further supporting the interior of the tunnel.

[0010] The utility model has the following advantages:

[0011] 1. The tunnel foundation pit support structure of the tunnel construction is formed by four arc-shaped support beams, and the two are connected by a limit shaft to form an arc-shaped support structure, which is convenient for providing an installation position for the arc-shaped support plate and stably supporting the inside of the tunnel foundation pit. Four supporting square tubes and four supporting columns are provided, and two cross beams are fixedly connected to the top ends of the four support columns. At the same time, the output ends of the four hydraulic cylinders are fixedly connected to the sides of the four support columns. Through the extension action of the four hydraulic cylinders, the two cross beams are pushed to move vertically, which is convenient for adjusting the installation position of the arc-shaped support plate to meet the support of the inside of the tunnel at different heights, thereby effectively solving the problems existing in the prior art.

[0012] 2. The tunnel foundation pit support structure of the tunnel construction is provided with four arc-shaped support beams, and the two ends of two adjacent arc-shaped support beams are fixedly connected by multiple limit shafts to form a stable structure. By disassembling the multiple limit shafts and energizing the four motors at intervals, the two arc-shaped support beams can be easily retracted and extended, and the whole can be disassembled later for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model from a first perspective;

[0014] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle;

[0015] Figure 3 This is a schematic diagram of the beam structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the supporting square tube structure of the utility model;

[0017] Figure 5 It is a schematic diagram of the exploded structure of the arc-shaped support beam of the utility model.

[0018] In the figure: 1-support square tube, 2-support column, 3-raised block, 4-arc support plate, 5-motor, 6-limiting shaft, 7-arc support beam, 8-support rod, 9-cross beam, 10-guide rail, 11-sliding block, 12-hydraulic cylinder, 13-support beam, 14-limiting seat, 15-screw rod, 16-mounting slot. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0020] like Figures 1 to 5 As shown, a tunnel foundation pit supporting structure for tunnel construction comprises four supporting square tubes 1, in which supporting columns 2 are slidably connected, one side of the bottom end of the four supporting square tubes 1 is fixedly connected to a hydraulic cylinder 12, the output ends of the four hydraulic cylinders 12 are respectively fixedly connected to one side of the four supporting columns 2, the top ends of the four supporting columns 2 are fixedly connected to two cross beams 9, both ends of the two cross beams 9 are rotatably connected to arc-shaped supporting beams 7, the ends of the two arc-shaped supporting beams 7 are respectively provided with mounting grooves 16, one ends of the other two arc-shaped supporting beams 7 are respectively slidably connected to the two mounting grooves 16, one side of the two arc-shaped supporting beams 7 is provided with a plurality of limit shafts 6, and the top surfaces of the four arc-shaped supporting beams 7 are provided with arc-shaped supporting plates 4.

[0021] A through groove is provided on one side of the four supporting square tubes 1, and a limiting socket 14 is provided on the side where the four supporting square tubes 1 are close to each other. A supporting beam 13 is provided between two adjacent limiting sockets 14, as an optional technical solution of the utility model, which facilitates stabilizing the relative positions of the two supporting square tubes 2. At the same time, the side surfaces of the four limiting sockets 14 are designed in a stepped shape, and the two ends of the two supporting beams 13 are designed in a stepped shape, which facilitates early installation and later disassembly.

[0022] Both ends of the two cross beams 9 are fixedly connected to the top ends of the four support columns 2 by welding. As an optional technical solution of the utility model, this facilitates the stable connection of the two support columns 2 to the two ends of a cross beam 9, and then facilitates the limiting of the position of the cross beam 9. At the same time, the cross beam 9 provides an installation position for the two arc-shaped support beams 7, and then multiple cross beams 9, two support columns 2 and two supporting square tubes 1 are combined into a support structure, and then multiple support structures are set up to facilitate the support of the interior of the tunnel foundation pit.

[0023] Two motors 5 are fixedly connected to the middle of the top surfaces of the two cross beams 9, and the output ends of the four motors 5 are fixedly connected to lead rails 10 on both sides of the top surfaces of the two cross beams 9. The insides of the four guide rails 10 are slidably connected to sliding blocks 11, and the four sliding blocks 11 are respectively threadedly connected to the four lead rods 15. Rotatable support rods 8 are provided on the top surfaces of the four sliding blocks 11 and the middle parts of the four arc-shaped support beams 7. As an optional technical solution of the utility model, it is convenient to power on the motor 5 to drive the sliding block 11 to move along the guide rail 10, and drive the arc-shaped support beam 7 to rotate through the support rod 8, thereby changing the relative position of the arc-shaped support beam 7.

[0024] The outer circumferential surfaces of the four arc-shaped support beams 7 are fixedly connected with raised blocks 3, and the top surfaces of the four raised blocks 3 are in contact with both sides of the arc-shaped support plate 4. As an optional technical solution of the utility model, this facilitates providing an installation position for the arc-shaped support plate 4, thereby facilitating stable support of the arc-shaped support cross plate 4, and further supporting the interior of the tunnel.

[0025] The tunnel foundation pit support structure of the tunnel construction requires the following steps when used:

[0026] 1) The user powers on the four motors 5 to drive the arc-shaped support beams 7 to move relative to each other and form an arc-shaped structure;

[0027] 2) After the arc-shaped support beams 7 are combined into an arc-shaped structure, multiple limit shafts 6 are used to lock the position;

[0028] 3) Install the arc support plate 4 on the top surface of the arc support plate 4;

[0029] 4) The four hydraulic cylinders 12 extend to push the two cross beams 7 to move vertically, pushing the arc-shaped support plate 4 to move to the installation position.

[0030] To sum up, when the user uses it, four arc-shaped support beams 7 are used, and the two are connected by a limiting shaft 6 to form an arc-shaped support structure, which is convenient for providing an installation position for the arc-shaped support plate 4 and stably supporting the inside of the tunnel foundation pit. Four supporting square tubes 1 and four supporting columns 2 are provided, and two cross beams 9 are fixedly connected to the top ends of the four support columns 2. At the same time, the output ends of the four hydraulic cylinders 12 are fixedly connected to the sides of the four support columns 2. Through the extension action of the four hydraulic cylinders 12, the two cross beams 7 are pushed to move vertically, which is convenient for adjusting the installation position of the arc-shaped support plate 4 to meet the support of the inside of tunnels at different heights, thereby effectively solving the problems existing in the prior art. Then, four arc-shaped support beams 7 are provided, and the two ends of the two adjacent arc-shaped support beams 7 are fixedly connected by multiple limiting shafts 6 to form a stable structure. By disassembling the multiple limiting shafts 6, and at the same time, the four motors 5 are powered on and operated at intervals of two to facilitate the retraction and extension of the two arc-shaped support beams 7, so as to facilitate the later disassembly of the whole for recycling.

[0031] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tunnel foundation pit support structure for tunnel construction, characterized in that: The invention comprises four supporting square tubes (1), wherein a supporting column (2) is slidably connected inside the four supporting square tubes (1), one side of the bottom end of the four supporting square tubes (1) is fixedly connected to a hydraulic cylinder (12), the output ends of the four hydraulic cylinders (12) are respectively fixedly connected to one side of the four supporting columns (2), the top ends of the four supporting columns (2) are fixedly connected to two cross beams (9), both ends of the two cross beams (9) are rotatably connected to arc-shaped supporting beams (7), the ends of the two arc-shaped supporting beams (7) are provided with mounting grooves (16), one end of the other two arc-shaped supporting beams (7) are respectively slidably connected to the two mounting grooves (16), one side of the two arc-shaped supporting beams (7) is provided with a plurality of limiting shafts (6), and the top surfaces of the four arc-shaped supporting beams (7) are provided with arc-shaped supporting plates (4).

2. The tunnel foundation pit support structure for tunnel construction according to claim 1, characterized in that: A through slot is provided on one side of the four supporting square tubes (1), a limit clamping seat (14) is provided on the side of the four supporting square tubes (1) close to each other, and a support beam (13) is provided between two adjacent limit clamping seats (14).

3. The tunnel foundation pit support structure for tunnel construction according to claim 2, characterized in that: Both ends of the two cross beams (9) are fixedly connected to the top ends of the four support columns (2) by welding.

4. The tunnel foundation pit support structure for tunnel construction according to claim 3, characterized in that: Two motors (5) are fixedly connected to the middle of the top surfaces of the two cross beams (9), and the output ends of the four motors (5) are fixedly connected to screw rods (15). Both sides of the top surfaces of the two cross beams (9) are fixedly connected to guide rails (10), and the insides of the four guide rails (10) are slidably connected to sliding blocks (11), and the four sliding blocks (11) are respectively threadedly connected to the four screw rods (15). The top surfaces of the four sliding blocks (11) and the middle parts of the four arc-shaped support beams (7) are provided with rotatable support rods (8).

5. The tunnel foundation pit support structure for tunnel construction according to claim 4, characterized in that: The outer circumferential surfaces of the four arc-shaped support beams (7) are all fixedly connected with protruding blocks (3), and the top surfaces of the four protruding blocks (3) are all in contact with the two sides of the arc-shaped support plate (4).

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