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Three-arched tunnel construction method

A technology for tunnel construction and triple arches, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc. It can solve the problems of inability to deploy large machinery, large cross-interference of processes, and many disturbances of surrounding rocks, so as to reduce secondary disturbances, The effect of large construction space and strong construction period guarantee

Inactive Publication Date: 2019-03-19
THE 4TH ENG OF CHINA RAILWAY 5TH ENG GROUP +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When building highways or subway triple-arch tunnels in my country, the construction method of excavating the middle partition wall first and then digging the side and middle holes is mainly adopted. This kind of construction method has the disadvantages of many procedures and many disturbances to the surrounding rock, and causes large-scale The machinery cannot be deployed, the process cross-interference is large, and the construction progress is slow.
At present, there is no safe and simple construction method for the excavation and support of mountain three-arch railway tunnels

Method used

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Embodiment Construction

[0033] see figure 1 , the three-arch tunnel construction method of the present invention comprises the following steps:

[0034] Excavate the left hole first, and then excavate the right hole after the initial support of the entire section of the left hole is closed to form a ring. The excavation stagger distance between the left hole and the right hole is greater than 15 meters; 6 are completed and then the middle hole is excavated; when excavating the middle hole, the upper half section 7 is excavated first, and then the arch portion 8 is lined. .

[0035] The construction method of the three-arch tunnel is specifically carried out as follows:

[0036] (1) The left hole goes first, the initial support of the entire section of the left hole is closed to form a ring, and then the right hole is excavated

[0037] like figure 2 As shown, the excavation of the left hole and the right hole adopts the method of three steps plus temporary horizontal braces, that is, after the a...

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Abstract

The invention relates to a three-arched tunnel construction method. The three-arched tunnel construction method comprises the following steps that a left opening is first excavated, the complete crosssection of the left opening is preliminarily supported and close to form a ring, then a right opening is excavated, and the staggering distance of excavation of the left opening and the right openingis greater 15 meters; after secondary lining and a middle partition wall of the left opening and the right opening are completed, a middle opening is excavated; when the middle opening is excavated,an upper half cross section is firstly excavated, then arch lining is executed, the lower portion is excavated after the arch lining is completed, and finally an inverted arch of the middle opening isconstructed. The three-arched tunnel construction method has the advantages of few working processes, few surrounding rock disturbance times, good safety, high working efficiency, high construction progress and the like.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a construction method for a triple-arch tunnel. Background technique [0002] When building roads or subway triple-arch tunnels in my country, the construction method of first excavating the middle partition wall and then digging the side and middle holes is mainly adopted. This kind of construction method has the disadvantages of many processes and many disturbances to the surrounding rock, and causes large-scale The machinery cannot be deployed, the cross-interference of the process is large, and the construction progress is slow. At present, there is no safe and convenient construction method for the excavation and support of mountain three-arch railway tunnels. Contents of the invention [0003] Based on this, the object of the present invention is to provide a construction method for a triple-arch tunnel, which has the advantages of fewer procedures, fewer dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D9/14E21D11/10E21D11/14
CPCE21D9/00E21D9/14E21D11/10E21D11/14
Inventor 龚志文肖承倚陈彬李坤蒋思罗都颢唐新文舒全满刘臻武王斌
Owner THE 4TH ENG OF CHINA RAILWAY 5TH ENG GROUP
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