Tunnel protection structure crossing high-top and deep-bottom karst cave

Abstract

The invention relates to a tunnel protection structure crossing a high-top and deep-bottom karst cave, which is arranged in the high-top and deep-bottom karst cave and comprises a main body structure of a tunnel, a protective cover, a foundation protective cover, a foundation arc structure of the protective cover and a supporting arch bridge of the tunnel. The tunnel protection structure crossing a high-top and deep-bottom karst cave is characterized in that the protective cover is arranged above the main body structure of the tunnel; the foundation arc structure of the protective cover is arranged at the foundation root of the protective cover; and the foundation arc structure of the protective cover spans over the karst cave; a tunnel bottom arc structure spanning over the karst cave is arranged below the main body structure of the tunnel; and the tunnel bottom arc structure supports the main body structure of the tunnel. , by the tunnel protection structure crossing a high-top and deep-bottom karst cave, a high-top and deep-bottom semi-filling karst cave with short longitudinal distance can be protected, the purpose of minimizing serious damage of dangerous falling rocks to projects is realized, and the safety and the reliability of the construction and the long-term operation of the main body structure of the tunnel can be ensured.

Description

technical field [0001] The invention relates to the field of tunnels and underground engineering, in particular to a tunnel protection structure passing through upper and lower deep karst caves. Background technique [0002] Carbonate rocks are widely distributed in some provinces and cities in my country. When tunnels pass through carbonate rock formations, they will inevitably encounter various karst types, especially when tunnels pass through large semi-filled caves. Bring a series of difficulties, improper handling, will cause great harm to construction and driving safety. [0003] At present, when tunnels pass through large semi-filled karst caves, the main protective measures are shotcrete anchor nets. However, for large karst caves with high upper and lower depths, the traditional spray anchor nets have poor protection safety and difficult to guarantee construction quality. During tunnel construction and operation There are security risks. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0002] Carbonate rocks are widely distributed in some provinces and cities in my country. When tunnels pass through carbonate rock formations, they will inevitably encounter various karst types, especially when tunnels pass through large semi-filled caves. Bring a series of difficulties, improper handling, will cause great harm to construction and driving safety

[0003] At present, when tunnels pass through large semi-filled karst caves, the main protective measures are shotcrete anchor nets. However, for large karst caves with high upper and lower depths, the traditional spray anchor nets have poor protection safety and difficult to guarantee construction quality. During tunnel construction and operation There are security risks

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