A subway construction dewatering system and dewatering method for complex underground

Abstract

The invention relates to the technical field of groundwater control by lowering the groundwater level line, and discloses a subway construction precipitation system and a precipitation method under complex ground. The dewatering system includes a dewatering well, a drainage pipe connecting the dewatering well and the discharge point, and a pump set on the drainage pipe. Open wells; dark wells are set above the groundwater level. In the present invention, the dewatering wells that play a major role and cannot be adjusted arbitrarily are set as dark wells in the underground cavern, and the dewatering wells that play a secondary role in the periphery are still excavated from the ground as open wells, and there is no need to change the original well. There is no need to demolish the surface buildings; by sealing the dark wells together with the suction pipes in the dark wells under the bottom plate at the end of the construction, the integrity of the bottom plate is ensured, so that the bottom plate will not be damaged by the dewatering wells. Leave holes.

Description

A precipitation system and precipitation method for subway construction under complex ground technical field The present invention relates to the technical field of controlling groundwater by lowering the groundwater level, particularly to a Precipitation system and precipitation method for subway construction under complex ground. Background technique [0002] In the construction process of underground caverns, it is inevitable to pass through water-bearing formations. Contribution of aquifer formation to underground caverns During the construction process, because the water-bearing stratum was cut off, under the action of the pressure difference, the groundwater would inevitably seep continuously. into the underground cavern, causing flooding and worsening the construction conditions on site. Under the action of dynamic water pressure, it may also cause quicksand, piping and Slope instability, etc. Therefore, in order to ensure the safety of underground cavern cons...

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Problems solved by technology

[0008] The technical problem to be solved is: the existing precipitation wells are facing two difficulties during the excavation process. One is that there are obstacles on the construction site that affect the excavation of the precipitation wells, and the other is that the precipitation wells will penetrate the ground to be excavated. The bottom plate of the underground cavern, resulting in poor waterproof effect

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