Assembly type temporary supporting structure in shield tunnel

Abstract

The utility model belongs to the field of buildings, and particularly relates to an assembly type temporary supporting structure in a shield tunnel, which is formed by connecting a plurality of steel bar supports. The multi-truss steel bar bracket is formed by connecting I-shaped steel components through high-strength bolts; the I-shaped steel component comprises a bottom supporting frame, two vertical rods connected with the two ends of the bottom supporting frame, a top supporting frame with one end connected with the vertical rods and a first transverse rod connected with the other end of the top supporting frame. According to the structure, the full-equipment assembly type detachable technology is achieved, disassembly and transportation are convenient, due to the fact that an industrial production method and the assembly type detachable technology are adopted, components can be replaced at any time, different construction conditions can be coped with by replacing the components in different site environments, and therefore the construction cost is saved, and the construction efficiency is improved. The construction period is shortened, and the construction efficiency is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the field of construction, and in particular relates to an assembled temporary support structure in a shield tunnel. Background Art

[0002] Shield tunneling technology can effectively improve road layout and optimize routes in urban construction planning, thereby achieving greater economic benefits. In recent years, as tunnel spans have continued to increase, so have the problems and challenges encountered during construction, such as surrounding rock deformation, excavation, and support issues. This has led to a surge in interest in shield tunneling technology. Large-cross-section tunnel construction generally utilizes the partial excavation method, for which temporary supports are an essential support system.

[0003] Temporary support structures during shield tunnel construction are installed during tunnel excavation to prevent soil deformation or collapse, which could lead to damage or excessive deformation of the shield tunnel structure. Currently, the most commonly used temporary support structures for shield tunnels constructed in rock and soil are component supports. Component supports operate by placing concrete or steel supports within the tunnel section. After the shield tunnel segments emerge from the shield tail, they share the load with the segments, bearing the water and soil loads and grouting pressure outside the tunnel. These temporary support structures can effectively reduce the convergence deformation of the shield tunnel section after the shield tail emerges, improve the tunnel's load distribution, and limit crack development or joint opening in the tunnel segments under the most unfavorable load conditions, thereby preventing excessive deformation of the tunnel section and damage to the segments during construction. However, most traditional temporary support structures suffer from complex installation and disassembly processes, large construction volumes, and long construction periods. Furthermore, the same temporary support structure cannot be used with tunnel sections of varying dimensions, making it difficult to reuse. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects in the prior art and provide an assembled temporary support structure in a shield tunnel.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] A prefabricated temporary support structure in a shield tunnel is composed of multiple steel bar supports connected together; the multiple steel bar supports are composed of I-beam components connected by high-strength bolts; the I-beam components include a bottom support frame, two vertical rods connected to the two ends of the bottom support frame, a top support frame with one end connected to the vertical rods, and a first cross bar connected to the other end of the top support frame.

[0007] The I-beam component further includes a second crossbar connecting the two vertical bars.

[0008] The height of the second cross bar from the bottom support frame is equal to the height of the first cross bar from the bottom support frame.

[0009] The I-beam component further includes a supporting diagonal rod connecting the end of the first crossbar and the vertical rod.

[0010] The bottom support frame includes an arc-shaped bottom support frame body and bottom support frame connecting pieces arranged on both sides of the bottom support frame body and used for connecting with the vertical rods.

[0011] The top support frames are respectively distributed on the left and right sides of the two vertical rods.

[0012] The top support frame includes an arc-shaped top support frame body and top support frame connecting pieces arranged on both sides of the top support frame body and connected to the vertical rod and the first cross rod respectively.

[0013] It is composed of 4 steel support brackets;

[0014] The I-beam component further comprises a third crossbar connecting adjacent steel bar supports; the third crossbar is respectively connected to the vertical bars.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. Improve efficiency: The assembled temporary support in the shield tunnel adopts an industrialized production model and can carry out standardized production processes, so that the steel structure assembly process is industrialized, which improves construction quality and work efficiency and reduces construction costs.

[0017] Second, it is scalable: All components of the steel support are connected by high-strength bolts. After assembly, it is still possible to add components at the connection points of the support components, or remove some components to transfer or replace new ones. Components can also be customized to achieve specific functions as needed.

[0018] 3. Save resources: The design, manufacturing and recycling mode of the assembled temporary supports in shield tunnels can reduce the generation of waste. The main material of the assembled temporary supports in shield tunnels is steel, so that the originally non-reusable parts can be recycled and reused, reducing resource waste and alleviating environmental pollution, which is in line with the environmental protection concept in the field of modern construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the assembled temporary support structure in the shield tunnel of the utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of the assembled temporary support structure in the shield tunnel of the utility model;

[0021] Figure 3 This is a schematic diagram of the overall structure of the bottom support frame of the utility model;

[0022] Figure 4 This is a schematic diagram of the overall structure of the top support frame of the utility model;

[0023] Figure 5 This is a schematic diagram of the connection between the top support frame and the first crossbar of the utility model. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and the best embodiment.

[0025] Figure 1-5 A temporary assembled support structure in a shield tunnel is shown, which is composed of multiple steel support brackets connected together; the multiple steel support brackets are composed of I-beam components connected by high-strength bolts; the I-beam components include a bottom support frame 1, two vertical rods 2 connected to the two ends of the bottom support frame, a top support frame 4 connected to the vertical rods 2 at one end, and a first cross bar 6 connected to the other end of the top support frame.

[0026] The I-beam component further includes a second crossbar 5 connecting the two vertical bars.

[0027] The height of the second cross bar 5 from the bottom support frame 1 is equal to the height of the first cross bar 6 from the bottom support frame 1 .

[0028] The I-beam component further includes a supporting diagonal rod 3 connecting the end of the first crossbar 6 and the vertical rod 2.

[0029] The bottom support frame includes an arc-shaped bottom support frame body 11 and bottom support frame connectors 12 arranged on both sides of the bottom support frame body 11 for connecting with the vertical rods 2 .

[0030] The top support frames 4 are respectively distributed on the left and right sides of the two vertical rods 2 .

[0031] The top support frame 4 includes an arc-shaped top support frame body 41 and top support frame connectors 42 arranged on both sides of the top support frame body and connected to the vertical rod 2 and the first cross rod 6 respectively.

[0032] As one of the implementation forms, it is composed of 4 steel support brackets connected together. Figure 2 As shown, it is a circle with a radius of 1.5m, and the weight of a single steel bar support is about 8 kilograms; the I-beam component also includes a third cross bar 7 connecting adjacent steel bar supports; the third cross bar 7 is connected to the vertical bars 2 respectively.

[0033] When installing this device, proceed from the bottom to the top. According to the on-site temporary construction plan, transport the components of the shield tunnel's assembled temporary support to the designated location. First, connect the bottom support frame components and tighten the bolts. Next, connect at least two frames to form a stable base. Connect the vertical bars and the first horizontal bar, and finally connect the remaining components to complete the reinforcement support. Further connections can be made at the reserved joints of the reinforcement components to increase the length of the reinforcement support or replace components.

[0034] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. A temporary support structure assembled in a shield tunnel, characterized in that: It is composed of multiple steel bar supports connected together; the multiple steel bar supports are composed of I-beam components connected by high-strength bolts; the I-beam components include a bottom support frame, two vertical rods connected to the two ends of the bottom support frame, a top support frame with one end connected to the vertical rod, and a first cross bar connected to the other end of the top support frame.

2. The assembled temporary support structure in a shield tunnel according to claim 1, characterized in that: The I-beam component further includes a second crossbar connecting the two vertical bars.

3. The assembled temporary support structure in a shield tunnel according to claim 2, characterized in that: The height of the second cross bar from the bottom support frame is equal to the height of the first cross bar from the bottom support frame.

4. The assembled temporary support structure in a shield tunnel according to claim 1, characterized in that: The I-beam component further includes a supporting diagonal rod connecting the end of the first crossbar and the vertical rod.

5. The assembled temporary support structure in a shield tunnel according to claim 1, characterized in that: The bottom support frame includes an arc-shaped bottom support frame body and bottom support frame connecting pieces arranged on both sides of the bottom support frame body and used for connecting with the vertical rods.

6. The assembled temporary support structure in a shield tunnel according to claim 1, characterized in that: The top support frames are respectively distributed on the left and right sides of the two vertical rods.

7. The assembled temporary support structure in a shield tunnel according to claim 1, characterized in that: The top support frame includes an arc-shaped top support frame body and top support frame connecting pieces arranged on both sides of the top support frame body and connected to the vertical rod and the first cross rod respectively.

8. The assembled temporary support structure in a shield tunnel according to claim 1, characterized in that: It is composed of 4 steel support brackets.

9. The assembled temporary support structure in a shield tunnel according to claim 1, characterized in that: The I-beam component further comprises a third crossbar connecting adjacent steel bar supports; the third crossbar is respectively connected to the vertical bars.

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