Siphon reverse slope drainage system and drainage method

Abstract

The invention relates to the technical field of tunnel reverse slope drainage, and provides a siphon type reverse slope drainage system, comprising a sump, a pumping device, a water collecting device, a siphon drainage pipe and a vacuum pump; the sump is arranged in the tunnel; the water collecting device Placed in the tunnel, and the inlet of the water collecting device is connected with the sump through the pumping device; the outlet of the water collecting device is connected with the inlet of the siphon drain pipe, and the outlet of the siphon drain pipe is set outside the tunnel, and the outlet of the siphon drain pipe The elevation is lower than the elevation of the outlet of the water collecting device; the inlet of the vacuum pump communicates with the siphon drainage pipe through the suction pipe. The invention utilizes the principle of siphon to automatically drain the water in the water collecting device to the outside of the tunnel, effectively solving the problem of water in the face of the reverse slope tunnel, and does not need electric drive in the process of automatic drainage, eliminating the need for traditional reverse slope drainage methods. A large number of graded water collection wells and pumping stations greatly save manpower, electricity, raw materials, etc., and have the advantages of environmental protection and energy saving.

Description

technical field [0001] The invention relates to the technical field of tunnel reverse slope drainage, in particular to a siphon type reverse slope drainage system and a drainage method. Background technique [0002] When constructing tunnels in mountains with complex geological and hydrological conditions, the tunnel waterproof and drainage design follows the principles of "prevention, drainage, interception, blocking, adapting measures to local conditions, and comprehensive treatment". Therefore, drainage is a difficult point in the construction of water-rich tunnels, especially in the excavation of the reverse slope section of the long tunnel. If the groundwater cannot be discharged in a timely and effective manner, it will lead to surface water, which will not only seriously interfere with the normal construction of excavation, support and lining operations, but even cause geological disasters such as large soft rock deformation and surrounding rock collapse , causing en...

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Problems solved by technology

The application number is 201820348100.7, and the patent application titled the reverse slope drainage system of railway single-track tunnel, although the reverse slope drainage system is disclosed, but this drainage system also needs to build a water collection well and pump station every 50-200m in the tunnel. Relying on electric power to drive water pumps requires a large investment in equipment, materials, and labor. Due to the multi-stage pumps, the power consumption is large, and a large number of water collection wells need to be backfilled in the later stage.

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