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A construction method for shield segment disassembly and assembly

A technology of shield segment and construction method, which is applied in vertical shaft equipment, earthwork drilling, wellbore lining, etc., can solve the problems of complicated replacement of shield segment, lack of stability, and difficulty in replacing segment accurately.

Active Publication Date: 2022-05-20
CHINA RAILWAY 25TH BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the replacement of shield segments is extremely complicated and difficult, and there is currently no effective construction method for stably and accurately replacing segments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] A shield segment disassembly construction method, comprising the following steps

[0019] A. Use the rear support device and the front support device to support the old shield segments of the 0th ring and the 3rd ring respectively;

[0020] B. Remove the old shield segment of the first ring;

[0021] C. Install the auxiliary segment at the first ring close to the 0th ring. The ring width of the auxiliary segment is smaller than that of the shield segment and the corresponding shield segment is provided with a longitudinal bolt hole, and the auxiliary segment is connected by the longitudinal connecting bolt. fixed;

[0022] D. Remove the old shield segment of the second ring;

[0023] E. The auxiliary segment moves forward, drag the auxiliary segment at the first ring to the position close to the third ring at the second ring, and then fix the longitudinal connecting bolt;

[0024] F. Install a new shield segment at the first ring;

[0025] G. The auxiliary segment m...

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Abstract

A construction method for disassembling shield tunneling segments, in which shield tunneling segments of two adjacent rings at the front and rear are respectively supported by a front supporting device and a rear supporting device, and then the old shield tunneling segments between the front and rear supporting devices are removed; After dismantling the shield segment of the rear ring, use the auxiliary segment for temporary support, and then remove the shield segment of the front ring, and when installing a new shield segment at the rear ring, the The auxiliary segment moves to the front ring for temporary support; the auxiliary segment is relatively smaller in ring width and outer diameter than the shield segment, and the inner diameter is larger; in this way, the shield tube is moved and replaced ring by ring along the direction of the tunnel slices until all shield segments are replaced. Through the disassembly and assembly method of the shield segment, the shield segment can be replaced stably and quickly. It has a high degree of standardization, wide popularity, and easy operation, which can effectively improve the safety of the shield segment replacement work. and quality of work.

Description

technical field [0001] The invention relates to road engineering construction, in particular to a construction method for disassembling shield segments in tunnels. Background technique [0002] A tunnel is a kind of engineering building buried in the ground, including highway tunnels passing through mountains and underground subway tunnels. The tunnel is mainly constructed by the shield machine, and the shield segment is the main assembly component of the shield construction and the innermost barrier of the tunnel, which bears the role of resisting soil pressure, groundwater pressure and some special loads. Shield segments are usually made of high-strength impermeable concrete, and multiple shield segments are assembled into a ring by lining assembly. [0003] The shield segment has the characteristics of high strength and high durability, but under the dual effects of the long-term natural environment and the use environment, the shield segment will inevitably have differe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/08
CPCE21D11/08
Inventor 代为张春浩姜佑明欧剑文雪峰韦露明
Owner CHINA RAILWAY 25TH BUREAU GRP
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