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Quick transition construction method for variable-section large-span tunnel

A construction method and large-span technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of difficult construction, many safety hazards and slow construction progress of large-span tunnels with continuous variable cross-sections, etc., to improve construction efficiency, The effect of convenient process conversion and reduced labor intensity

Pending Publication Date: 2022-06-03
CHINA CONSTR FIFTH ENG DIV CORP LTD +1
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Problems solved by technology

[0003] Aiming at the problems of traditional tunnel excavation methods such as many potential safety hazards, high construction difficulty, and slow construction progress for continuous variable-section large-span tunnels, the present invention proposes a fast transition construction method for variable-section large-span tunnels, which is suitable for two-lane lining sections CD Double side wall method conversion construction project of normal five-lane lining section

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  • Quick transition construction method for variable-section large-span tunnel
  • Quick transition construction method for variable-section large-span tunnel
  • Quick transition construction method for variable-section large-span tunnel

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Embodiment Construction

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Reference attached Figure 1-6 , a rapid transition construction method for a variable-section large-span tunnel, comprising the following steps:

[0028] S101: Apply the advance small duct, excavate 1 double-lane CD method, apply temporary vertical support and double-lane primary support, and support the temporary steel frame within 2m before the demarcation mileage.

[0029] Further, the temporary steel frame for support involve...

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Abstract

The invention relates to the technical field of tunnel construction, in particular to a rapid transition construction method for entering a two-lane or three-lane general-span tunnel into a super-large-span tunnel. Wherein the upper steps of the tunnel with the two lanes or the three lanes enter the upper steps of the pilot tunnel on one side of the super-large section, and then the pilot tunnel on the other side of the super-large section is excavated in a mode of constructing the transverse channel, so that the rapid and safe conversion of a double-side-wall construction method for entering the tunnel with the small section into the tunnel with the large section is realized. According to the method, construction can be orderly and controllable under the condition that safety is guaranteed, the goal of tunneling construction that a small section rapidly enters a large-section tunnel is achieved, the construction period progress is guaranteed, working procedure conversion is convenient, labor intensity is relieved, construction efficiency is improved, and cost is reduced.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, and relates to a rapid transition construction method for a variable-section large-span tunnel, in particular to a rapid transition construction method for a two-lane or three-lane general-span tunnel entering a super-span tunnel. Background technique [0002] With the development of my country's urbanization process, tunnel construction projects have also ushered in a new peak period of development. Due to the constraints of surrounding terrain and basic and friendly structures, access to existing roads and road crossing needs, urban mountain tunnels are designed to continuously change sections, such as shallow burial, small clear distance, variable double arches, and double arches and then larger sections. etc., there are changes in the headroom size of the cross-section tunnel, and stress concentration at the cross-section change. If the construction control is not appropriate, it ...

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Application Information

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IPC IPC(8): E21D9/00E21D11/00E21D11/10E21D11/14
CPCE21D9/00E21D11/003E21D11/105E21D11/14Y02E10/20
Inventor 谭芝文李智张锐张程夏新乐韩世友陈宇波戴亦军叶诗培沈成建
Owner CHINA CONSTR FIFTH ENG DIV CORP LTD
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