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Construction method of deep-buried intersecting tunnel group in semi-diagenetic area

A construction method and technology for tunnel construction, applied in tunnels, tunnel linings, underground chambers, etc., can solve problems such as structural instability, high collapse risk, vault settlement, etc., to save economic costs, solve structural instability, and speed up The effect of construction progress

Active Publication Date: 2021-06-18
GUANGZHOU METRO DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, a new technology is needed to solve the problems of vault settlement, structural instability and high risk of collapse during the simultaneous construction of level crossing and level crossing tunnels in the prior art

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  • Construction method of deep-buried intersecting tunnel group in semi-diagenetic area
  • Construction method of deep-buried intersecting tunnel group in semi-diagenetic area
  • Construction method of deep-buried intersecting tunnel group in semi-diagenetic area

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Embodiment Construction

[0042] The idea, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The same reference numbers are used throughout the drawings to indicate the same or similar parts.

[0043] It should be noted that, unless otherwise specified, when a feature is called "fixed" or "connected" to another feature, it can be directly fixed and connected to another feature, or indirectly fixed and connected to another feature. on a feature. In addition, descriptions such as up, down, left, and right used in the present invention are only relative to the mutual positional relationship of the components of the present invention in t...

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Abstract

The invention discloses a construction method of a deep-buried intersecting tunnel group in a semi-diagenetic area. The construction method comprises the following steps that firstly, an escalator tunnel is constructed, and an escalator tunnel arch frame is reinforced when the escalator tunnel reaches the intersection of transverse channels; the transverse channels are synchronously excavated and constructed from the intersection of the escalator tunnel and the transverse channels to the left side and the right side; after the transverse channels are constructed, synchronous excavation is conducted on the left side and the right side of a left line and a right line through a top-lifting conversion construction method to conduct main line tunnel construction, foot-locking anchor pipes are reinforced in the transverse channels and the corresponding primary support arch frame ranges on the two sides in time, and the escalator tunnel serves as a ballast outlet channel; and after excavation and primary support are completed, secondary lining construction is conducted. The construction sequence is arranged reasonably, the construction progress is effectively accelerated, and the cost is reduced; and meanwhile, the high risk of vault settlement and collapse caused by uneven structural stress of the multi-node three-dimensional intersecting tunnel is controlled, and the problem that the structure is unstable during construction of the deep-buried intersecting tunnel group in the semi-diagenetic area is solved.

Description

technical field [0001] The invention belongs to the field of tunnel engineering, and in particular relates to a construction method for deep-buried intersecting tunnel groups in semi-diagenetic areas. Background technique [0002] At present, semidiagenetic rock is a special kind of incompletely deposited and metamorphic rock of the Tertiary system, which has the characteristics of soil and rock, while the intersecting tunnels constructed in the semidiagenetic area have the characteristics of both plane crossing and three-dimensional intersection, and the intersection area is relatively large. There are many tunnels, and the tunnels are constructed at close distances. The vault settlement phenomenon will occur at the fork of the tunnel group construction, and the newly constructed tunnels will have a great impact on the structure of the existing tunnels, and there is a risk of collapse. Although a number of construction methods for small-spaced shallow-buried tunnel groups a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D9/14E21D11/10E21D11/18E21D11/38
CPCE21D9/00E21D9/14E21D11/107E21D11/38E21D11/183Y02E10/20
Inventor 史海欧农兴中邹成路罗文静李志南翟利华王睿蒋盼平易诗轩林锐崔红利
Owner GUANGZHOU METRO DESIGN & RES INST
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