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A tunnel construction method including support structure

A support structure and tunnel construction technology, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as difficulty in assembling support structures, and achieve the effects of high rigidity, high precision, and fast construction

Inactive Publication Date: 2020-04-21
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the object of the present invention is to provide a tunnel construction method that includes a support structure. The support structure is a prefabricated and assembled wall-free structure, and the pressure of the surrounding rock is transmitted through grouting, which solves the problem caused by the stress on the structure. Difficulty in assembling the support structure due to deformation

Method used

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  • A tunnel construction method including support structure
  • A tunnel construction method including support structure
  • A tunnel construction method including support structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take the step method tunnel construction as an example, such as figure 1 As shown, the specific construction steps are as follows:

[0026] (1) Determine the excavation process, subdivision size, and single longitudinal footage of the large-section tunnel: from top to bottom, it is divided into three subsections ①, ② and ③, and excavated in sequence;

[0027] (2) Excavate the specific subdivision ① to the design footage depth;

[0028] (3) Assemble the corrugated steel plate permanently from the side wall as the permanent support structure, and install trapezoidal rubber waterstop strips at the joints between the corrugated steel plates and fix them, and assemble the temporary support structure from the wall at the bottom of section ①; And place water bladders behind the temporary support structure;

[0029] (4) Tighten the bolts so that the design pre-tightening force is reached between the corrugated steel plates;

[0030] (5) Seal the end of the corrugated steel p...

Embodiment 2

[0035] Taking the double-side-wall pilot-pit method tunnel construction as an example, such as figure 2 As shown, the specific construction steps are as follows:

[0036] (1) Determine the excavation process, subdivision size, and single longitudinal footage of the large-section tunnel: from top to bottom, it is divided into nine subdivisions ①, ②, ③, ④, ⑤, ⑥, ⑦, ⑧, and ⑨, and Excavation in sequence;

[0037] (2) Excavate the pilot pits of subsections ① and ② to the design footage depth;

[0038] (3) Assemble corrugated steel plates on the permanent side walls on the left side of subsections ① and ② as a permanent support structure. At the same time, install trapezoidal rubber waterstop strips at the joints between corrugated steel plates and fix them. ② Assemble the temporary support structure from the temporary side wall on the right side; place a water bag behind the temporary support structure; tighten the bolts to make the corrugated steel plate reach the design pre-ti...

Embodiment 3

[0045] Such as image 3 Shown: For the full-section tunnel construction method, after a section of tunnel excavation, the integral permanent support structure can be assembled from the wall for airtight treatment, and then grout is poured between the permanent support structure and the surrounding rock until the grout solidifies Afterwards, the secondary lining is applied, and then the next section of the tunnel is constructed in such a cycle until the entire tunnel is completed. The construction method of the full-section tunnel is relatively simpler and more convenient.

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Abstract

The invention discloses a tunnel construction method including a support structure, which uses a step method or a partial excavation method to excavate the tunnel in sections; For the support structure, assemble the temporary support structure on the temporary side wall and support and fix the permanent support structure; pour grout between the permanent support structure and the surrounding rock; the second division: the grout to be prepared for the first division After solidification and the support structure is stable, excavate the second section of this section. After excavating to the length of the first section, repeat the construction of the first section, and cycle until the last section, and remove the temporary support structure , and apply secondary lining; after completing the construction of this section, excavate the next section of tunnel until the completion of the entire tunnel. In the method of the invention, the supporting structure is an assembled structure away from the wall, and has the characteristics of fast construction, high precision, high mechanization, high rigidity, high strength, etc., and solves the problem of difficulty in assembly caused by deformation caused by stress on the structure.

Description

technical field [0001] The invention belongs to the technical field of underground engineering construction, and in particular relates to a tunnel construction method including a supporting structure. Background technique [0002] With the rapid development of the national economy, infrastructure construction represented by traffic engineering has been vigorously promoted, and the number of tunnel projects has continued to increase. Tunnel engineering under complex conditions not only needs to ensure its own stability, but also needs to meet the requirements of the surrounding environment, such as deformation, stress increase and other indicators must be controlled within a specific range of values. Similar requirements put forward more stringent requirements for tunnel construction methods and support systems. high demands. [0003] At present, for large-section tunnels with good ground conditions, the full-section excavation method is often used; for large-section tunnels...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00E21D11/10E21D11/18E21D11/38
CPCE21D11/003E21D11/10E21D11/18E21D11/385
Inventor 孙克国仇文革
Owner SOUTHWEST JIAOTONG UNIV
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