Siphon type adverse slope drainage system and method

Abstract

The invention relates to the technical field of adverse slope drainage of tunnels, and provides a siphon type adverse slope drainage system. The system comprises a collecting sump, a water pumping device, a water collecting device, siphon drainage pipes and vacuum pumps; the collecting sump is arranged in a tunnel; the water collecting device is arranged in the tunnel, and an inlet of the water collecting device communicates with the collecting sump through the water pumping device; an outlet of the water collecting device communicates with inlets of the siphon drainage pipes; outlets of the siphon drainage pipes are formed outside the tunnel, and elevation of the outlets of the siphon drainage pipes is smaller than that of the outlet the water collecting device; and inlets of the vacuum pumps communicate with the siphon drainage pipes through air suction pipes. Water in the water collecting device is automatically discharged to the outside of the tunnel according to the siphon principle, the problem of ponding of a tunnel face of the adverse slope tunnel is effectively solved, electric drive is not needed in an automatic drainage process, a large quantity of graded water collecting wells and pump stations in a traditional electric drive mode are omitted, manpower, electric power and raw materials are greatly saved, and the system has the advantages of being environmentally friendly 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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