Interval cable support suitable for embedded positioning hole of shield segment

Abstract

The utility model relates to the technical field of shield tunnels, in particular to an interval cable support suitable for a pre-buried positioning hole of a shield segment, which comprises channel steel and a support corbel, and the structural shape of the channel steel is matched with the structural shape of the inner wall of the shield segment. The channel steel is fixed on a pre-buried positioning hole of the shield segment through a chemical anchor bolt, an oblong hole is formed in the channel steel, and one end of the support corbel is detachably fixed at the position of the oblong hole of the channel steel through a bolt. The cable support has the advantages that the stress form of the cable support is simple, clear and reliable, vertical adjustment can be achieved, slippage can be effectively resisted through the arrangement of the teeth and the tooth-shaped gaskets, cable stability is guaranteed, and the cable support is suitable for the situation that positioning holes are pre-buried in urban railways and rail transit tunnel segments and can adapt to shield construction errors and reduce damage to the segments.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel technology, specifically to a section cable support suitable for pre-embedded positioning holes of shield tunnel segments. Background Technology

[0002] The existing shield tunnel segments of urban railways and rail transit have pre-embedded positioning holes to guide the installation of supports to avoid the steel reinforcement of the segments. However, due to construction errors in the shield tunnel sections, most supports cannot use the positioning bolt holes on the segments during installation. Instead, the traditional method of drilling holes after installation is used. This not only fails to realize the function of the positioning bolt holes on the segments, but also requires drilling holes after the segments are installed, causing damage to the segments. Furthermore, the construction environment for support installation is extremely poor, reducing efficiency. Summary of the Invention

[0003] The purpose of this utility model is to address the shortcomings of the existing technology by providing a section cable support suitable for pre-embedded positioning holes in shield tunnel segments. It adopts a trenchless process and optimizes and modifies the traditional cable support scheme to enable it to be adjusted vertically, thus accommodating errors in shield tunnel construction, reducing damage to shield tunnel segments, and improving the efficiency of cable support installation.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A cable support for pre-embedded positioning holes in tunnel lining segments is characterized by comprising a channel steel and a support arm, wherein the structural shape of the channel steel is compatible with the inner wall structure of the tunnel lining segment, the channel steel is fixed to the pre-embedded positioning holes of the tunnel lining segment by chemical anchors, an elongated hole is provided on the channel steel, and one end of the support arm is detachably fixed at the position of the elongated hole of the channel steel by bolts.

[0006] The channel steel has a plurality of elongated holes, and each of the elongated holes is provided with a support arm.

[0007] The periphery of the elongated hole is provided with teeth.

[0008] The chemical bolt is provided with a toothed washer.

[0009] The main body of the bracket arm is tilted upwards at a certain angle.

[0010] The advantages of this utility model are: 1) The force-bearing form of the cable bracket is simple, clear and reliable; 2) Vertical adjustment can be realized; 3) By setting teeth and toothed shims, slippage can be effectively resisted and cable stability can be ensured; 4) It is applicable to the situation of pre-embedded positioning holes in the tunnel segments of urban railways and rail transit, which can adapt to shield construction errors and reduce damage to the tunnel segments. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 for Figure 1 Side view;

[0013] Figure 3 This is a schematic diagram of the support arm structure in this utility model;

[0014] Figure 4 This is a schematic diagram of the structure of the tooth in this utility model;

[0015] Figure 5 This is a schematic diagram of the structure of the tooth pad in this utility model. Detailed Implementation

[0016] The features of this utility model and other related features will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0017] like Figure 1-5 As shown in the figure, numbers 1-6 represent: channel steel 1, oblong hole 2, tooth 3, bracket arm 4, bolt 5, and segment positioning hole 6, respectively.

[0018] Example: Figures 1 to 5 As shown, the cable support for the pre-embedded positioning holes of the shield tunnel segments in this embodiment can be used in conjunction with the positioning holes of the shield tunnel segments. This can be used to address the construction errors of the shield tunnel, and can further avoid drilling holes in the segments, reduce damage to the segments, and improve construction efficiency.

[0019] Specifically, in this embodiment, the main body of the cable support includes a channel steel 1, which is a straight or arc-shaped steel that matches the inner wall structure of the tunnel segment. The channel steel 1 is fixed to the segment positioning holes 6 provided on the tunnel segment by chemical anchors.

[0020] The channel steel 1 has several elongated holes 2, the length of which is aligned with the long side of the channel steel 1, to accommodate tunnel boring machine (TBM) construction errors. One end of the support arm 4 is mounted at the position of the elongated hole 2 via bolts 5. Teeth 3 are provided around the perimeter of the elongated hole 2, and the gaskets for the chemical anchors use toothed gaskets to prevent the channel steel 1 from slipping. During use, the support arm 4 can slide along the length of the elongated hole 2 before being fixed, thereby adjusting its vertical position on the channel steel 1.

[0021] In this embodiment, to ensure that the support arm 4 does not tilt downwards when moving up and down, such as Figure 3 As shown, the bracket arm 4 is tilted upwards by 2° during manufacturing.

[0022] In this embodiment, during the installation of the bracket, the channel steel 1 is connected to the segment positioning hole 6 using chemical anchors. When there is a conflict between the installation position of the chemical anchor and the bracket arm 4, the bracket arm 4 at the conflicting position can be disassembled first, and after the chemical anchor is fixed, the bracket arm 4 and the channel steel 1 can be reconnected using bolts 5.

[0023] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A cable support for pre-embedded positioning holes in tunnel lining segments, characterized in that: It includes a channel steel and a support arm, wherein the structural shape of the channel steel matches the inner wall structure of the shield tunnel segment. The channel steel is fixed to the pre-embedded positioning hole of the shield tunnel segment by chemical anchors. An elongated hole is opened on the channel steel. One end of the support arm is detachably fixed to the position of the elongated hole of the channel steel by bolts.

2. A cable support for pre-embedded positioning holes in tunnel lining segments according to claim 1, characterized in that: The channel steel has a plurality of elongated holes, and each of the elongated holes is provided with a support arm.

3. A cable support for pre-embedded positioning holes in tunnel lining segments according to claim 1 or 2, characterized in that: The periphery of the elongated hole is provided with teeth.

4. A cable support for pre-embedded positioning holes in tunnel lining segments according to claim 1, characterized in that: The chemical anchor is equipped with a toothed gasket.

5. A cable support for pre-embedded positioning holes in tunnel lining segments according to claim 1, characterized in that: The main body of the bracket arm is tilted upwards at a certain angle.

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