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Method for treating unfavorable geology segment of diversion tunnel and major-diameter diversion tunnel structure

A technology for water diversion tunnels and treatment methods, which is applied in tunnels, tunnel linings, underground chambers, etc., can solve the treatment method for poor geological sections of diversion tunnels, the structure of large-diameter diversion tunnels, and the bad geological sections of circular large-diameter diversion tunnels. The treatment method and the structure of the circular large-diameter diversion tunnel have achieved the effect of practical and feasible construction method, reduced construction cost and reduced difficulty.

Inactive Publication Date: 2015-12-02
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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Problems solved by technology

[0003] The object of the present invention is to provide a method for processing the unfavorable geological section of the water diversion tunnel and the structure of the large-diameter water diversion tunnel, especially a kind of circular large-diameter water diversion tunnel. Geological tunnel section processing method and circular large-diameter water diversion tunnel structure to solve technical problems when circular large-diameter water diversion tunnels pass through unfavorable geological sections such as broken and weak rock formations, so as to overcome the shortcomings of existing technologies

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  • Method for treating unfavorable geology segment of diversion tunnel and major-diameter diversion tunnel structure

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[0019] Specific implementation can refer to figure 1 In order to overcome the shortcomings of the existing technology, the present invention solves the problem of the weak rock formations that may be encountered in a circular large-diameter diversion tunnel. Combining the characteristics of hydropower and water conservancy projects and other similar engineering experience, a circular large-diameter diversion tunnel Treatment measures for the poor geological section of the weak rock formation of the diversion tunnel. The measures are carried out in the following steps:

[0020] 1. Preliminary excavation and support measures: In weak rock formations, the surrounding rock has a very short self-stabilization time or even no self-stabilization ability, and due to the large project diameter, reasonable openings can be taken according to the cavern span, lithology and other geological conditions. The excavation method adopts layered excavation or layered and block excavation, and exca...

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Abstract

The invention discloses a method for treating an unfavorable geology segment of a diversion tunnel and a major-diameter diversion tunnel structure. Combined with self-stabilization of a round tunnel, initial stage support and secondary lining are adopted to prevent a weak rock stratum zone from landslide, so that a diversion tunnel can safely work. The method can treat an unfavorable geology segment having a weak rock stratum zone, difficulty during construction can be reduced, the method is practical and feasible, advanced, reasonable and high in efficiency, so the speed of construction can be raised, the cost of construction can be effectively reduced, the construction can be smoothly carried out, and the diversion tunnel can safely work in the later.

Description

technical field [0001] The invention relates to a method for processing unfavorable geological sections of water diversion tunnels and a structure of large-diameter water diversion tunnels, in particular to a method for processing unfavorable geological sections of circular large-diameter water diversion tunnels and the structure of circular large-diameter water diversion tunnels, which belong to tunnel support technology field. Background technique [0002] In the construction of hydropower and water conservancy projects, a large number of water diversion tunnels are involved. Some tunnel sections of water diversion tunnels are sometimes inevitably arranged in broken and weak rock formations with poor geological conditions, especially in the construction process of circular large-diameter water diversion tunnels with weak rock formations. Among them, the excavation and treatment are very difficult, and the problem of landslides is more prominent, and repeated landslides oft...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D9/04E21D20/00
Inventor 赵继勇严成斌贺双喜祁伟强
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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