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Underground dome excavation construction arrangement structure and excavation method

A technology for arranging structures and construction channels, applied in underground chambers, earthwork drilling, wellbore lining, etc., can solve the problems of temporary support, increase excavation cost, difficulty, etc., to improve stability and construction safety, improve Stability, reducing the effect of temporary supports

Active Publication Date: 2015-07-29
CHINA RAILWAY ENG CONSULTING GRP CO LTD
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Problems solved by technology

[0003] The embodiment of the present invention provides an underground dome excavation construction layout structure and excavation method, which can solve the problem that the traditional excavation method is difficult to adapt to the construction of a large-span underground dome, and too many temporary supports increase the excavation cost

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  • Underground dome excavation construction arrangement structure and excavation method
  • Underground dome excavation construction arrangement structure and excavation method
  • Underground dome excavation construction arrangement structure and excavation method

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Embodiment Construction

[0045] The technical solutions of the various embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work are within the protection scope of the present invention.

[0046] Considering that the current ultra-large underground dome adopts the existing dome excavation technology, it needs to use too much temporary support, the excavation cost increases, and the excavation safety is difficult to guarantee. This embodiment provides an underground dome excavation construction layout structure and method of excavation.

[0047] An underground dome excavation construction layout structure, including: a central pillar and a construction passage; the construction...

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Abstract

The invention relates to the technical field of the underground construction and particularly relates to an underground dome excavation construction arrangement structure and an excavation method. The construction arrangement structure comprises a centre strut and a construction passage; the construction passage extends to the centre strut from the outside of an underground dome; the centre strut is of a step-shaped columnar structure which is decreased from bottom to top; an excavation connection exposure face of an III ring-shaped pilot tunnel, an excavation connection exposure face of an I3 ring-shaped pilot tunnel, an excavation connection exposure face of an I1 ring-shaped pilot tunnel, an excavation connection exposure face of an I2 ring-shaped pilot tunnel and an excavation connection exposure face of an II ring-shaped pilot tunnel are sequentially formed on the lateral surface of the centre strut from bottom to top; a crossed excavation connection exposure face is formed in the centre strut. In the excavating process, firstly, the centre strut is reserved; next, surrounding rocks of the ring-shaped pilot tunnels of the dome are excavated; then the centre strut is excavated. According to the construction arrangement and the excavation method, temporary supports can be reduced, construction cost is saved and meanwhile, stability of the surrounding rocks and construction safety in the dome excavating process are improved.

Description

technical field [0001] The invention relates to the technical field of underground engineering, in particular to an underground dome excavation construction layout structure and an excavation method. Background technique [0002] At present, there are many excavation methods for tunnels, including full-section method, step method, double-side-wall pilot-pit method, middle partition method, etc. The technology is relatively mature and can meet the requirements of tunnel excavation with different cross-sectional sizes under different surrounding rock conditions. As for the large-scale underground dome structure, due to its special shape, the force state of the surrounding rock is also relatively complicated. At present, there is no mature excavation method, and too many temporary supports need to be added. Contents of the invention [0003] Embodiments of the present invention provide an underground dome excavation construction layout structure and an excavation method, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/00
Inventor 刘建友赵勇田四明唐国荣王德福陈学峰吕刚马福东王婷李力杨甲豹朱敏郭磊
Owner CHINA RAILWAY ENG CONSULTING GRP CO LTD
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