A waterproof and drainage system used in the initial support construction stage of the tunnel

Abstract

The invention relates to the technical field of tunnel construction, in particular to a waterproof and drainage system used in the construction phase of the initial support of the tunnel. It includes a roof waterproof and drainage system and a straight wall waterproof and drainage system. The roof waterproof and drainage system is mainly composed of roof water diversion pipes that are driven vertically into the soil at the top of the tunnel. The straight wall water diversion pipes on both sides of the soil body are composed. The roof water diversion pipe and the straight wall water diversion pipe are provided with overflow holes in the part driven into the soil body. sump. The invention solves the drainage problem of the water-rich tunnel in the stage of initial support construction, improves the engineering quality, reduces safety risks, and has significant economic benefits.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a waterproof and drainage system used in the construction phase of the initial support of the tunnel. Background technique [0002] At present, in the tunnel waterproof and drainage stage, specific waterproof and drainage measures are mainly adopted between the composite lining of the tunnel body, and the waterproof and drainage measures during the initial support construction are often ignored. During initial support construction, a large amount of groundwater or excessive water pressure will cause water inrush, mud outburst, and even landslides in the tunnel. [0003] During engineering construction, the excavation surface is located below the groundwater level, and it is inevitable to come into contact with groundwater. The excavation leads to the destruction of the balance pressure of groundwater, which causes groundwater to leak into the excavation cavity, making...

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Problems solved by technology

[0002] At present, in the tunnel waterproof and drainage stage, specific waterproof and drainage measures are mainly adopted between the composite lining of the tunnel body, and the waterproof and drainage measures during the initial support construction are often ignored.

During the initial support construction, a large amount of groundwater or excessive water pressure will cause water inrush, mud outburst, and even landslides in the tunnel.

[0003] During engineering construction, the excavation surface is located below the groundwater level, and it is inevitable to come into contact with groundwater. The excavation leads to the destruction of the balance pressure of groundwater, which causes groundwater to leak into the excavation cavity, making the entire project in the initial construction process. China has been in the "pattering weather", which increases the difficulty of construction, reduces construction efficiency, increases the unsafe and unstable factors of the engineering structure, the construction process will become complicated, and the uncertainty and risk of the entire project will increase. come behind

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