Device for reducing underground water level

Abstract

The invention relates to a device for reducing the underground water level. The device comprises a water collecting well, a pumping and draining assembly used for pumping collected water in the watercollecting well is arranged above the water collecting well, the pumping and draining assembly comprises a centrifugal pump, a water pumping pipe and a water draining pipe, and a filtering assembly used for preventing silt from entering the water pumping pipe is arranged at the end, away from the centrifugal pump, of the water pumping pipe; and the filtering assembly comprises a primary filteringsleeve, a final filtering sleeve and a connecting sleeve, primary filtering holes are formed in the circumferential outer wall of the primary filtering sleeve, final filtering holes are formed in thecircumferential outer wall of the final filtering sleeve, and a locking assembly used for connecting the water pumping pipe with the connecting sleeve is arranged between the connecting sleeve and thewater pumping pipe. The device has the effects that the use stability of the water pumping pipe and the centrifugal pump is guaranteed, and accumulated water in the water collecting well is drained in time.

Description

technical field [0001] The application relates to the technical field of lowering groundwater, in particular to a device for lowering groundwater levels. Background technique [0002] Groundwater refers to the water that exists in the rock voids below the ground. In a narrow sense, it refers to the water in the saturated aquifer below the groundwater surface. In the national standard "Hydrogeological Terminology", groundwater refers to various forms of gravity water buried below the surface. In the process of building construction, in order to prevent groundwater from causing the foundation of the building to be soft, certain measures are generally taken to reduce the groundwater level. , so as to ensure the stability of the building foundation. [0003] The existing method of lowering the groundwater level is generally to drill a collection well around the foundation pit to be excavated, and then use a pump and a drainpipe to pump out the water in the drainage well, while ...

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Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that when using a suction pump to draw the accumulated water in the sump well, in order to ensure that the accumulated water in the sump well is drained, it is necessary to connect the end of the suction pipe away from the sump pump to the bottom of the sump well. Butt contact will cause a large amount of sediment to enter the suction pipe, resulting in blockage of the suction pipe, damage to the pump, and the defect that the accumulated water in the collection well cannot be discharged.

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