Pressure bearing tunnel bottom structure drainage system and construction method thereof

Abstract

The invention relates to a pressure bearing tunnel bottom structure drainage system and a construction method thereof. A central drain is arranged in the tunnel, each of the two sides of the tunnel is provided with a drainage side ditch, a pressure bearing permeable material is embedded in a transverse drain passage that forms the drainage side ditch and the central drain in the concrete, and a vertical drain passage is buried under the central drain; fabric or rope is chosen as the pressure bearing permeable material. According to the construction method of the pressure bearing tunnel bottom structure drainage system, a pressure bearing permeable material is embedded in the side ditch of the tunnel bottom and the central drain, the central drain and the tunnel bottom, the water in the side ditch can be guided to the central drain smoothly, underground water is guided and discharged to the central drain, the pressure at the tunnel bottom is reduced effectively, the damage of the tunnel structure caused by the pressure at the tunnel bottom is reduced.

Description

technical field [0001] The invention relates to the technical field of tunnel drainage facilities, in particular to a pressure-bearing tunnel bottom structure drainage system and a construction method thereof. Background technique [0002] With the large-scale construction of my country's transportation infrastructure, various diseases and risks faced by highway and railway tunnel construction emerge in endlessly. At present, the bottom structure of the designed tunnel is generally a structure with an inverted arch (or floor), and the groundwater discharge path is: surrounding rock→primary support→drainage blind pipe→side ditch→horizontal drainage pipe→central drainage ditch; that is, the water around the tunnel structure passes through The initial support seepage is drained to the central drainage ditch in the tunnel structure through the drainage blind pipe, and finally discharged outside the tunnel. [0003] The traditional drainage system is to set the central ditch in ...

AI Technical Summary

Problems solved by technology

Due to the lack of an effective drainage system at the bottom of the tunnel, the internal drainage cannot discharge the water at the bottom of the tunnel, resulting in the inability to effectively drain the accumulated water below the inverted arch of the tunnel, causing the inverted arch to bear part of the water pressure, resulting in uplift of the inverted arch, deformation of the ballast bed, and cracks in the lining Damage and other water damage events, maintenance and treatment are extremely difficult

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