Well point dewatering method and device

Abstract

The invention relates to a well point dewatering method and device. The well point dewatering method includes 1), preparing well point pipes used for dewatering according to engineering requirements, wherein the well point pipes are galvanized steel pipes with the external diameter smaller than 30mm; 2) installing all the well point pipes; 3) installing water pumping devices of the well point pipes. The well point dewatering device comprises water filter pipes used for dewatering, the well point pipes and the water pumping devices, wherein the well point pipes are galvanized steel pipes with the external diameter smaller than 30mm; the water pumping devices adopt single-phase self-priming pumps; each single-phase self-priming pump is connected with 3 to 5 well point pipes to form a well point dewatering unit, and all the well point dewatering units are connected with a main drain. The well point dewatering device has the advantages of being simple in structure, easy to repair and good in the dewatering effect.

Description

technical field [0001] The invention relates to the field of construction technology, in particular to a well point dewatering method and device. Background technique [0002] Well point precipitation is a method of artificially lowering the groundwater table. Therefore, it is also called "well point dewatering method". Before the foundation pit is excavated, a certain number of filter pipes (wells) are buried around the foundation pit, and the excavated soil is always kept dry by pumping water with pumping equipment. Generally, this method is used in the construction environment with a relatively high groundwater level. It is an important technical measure in the construction of earthworks, foundations and foundation works. It can drain the water in the foundation soil, promote the consolidation of the soil, and improve the strength of the foundation. At the same time, it can reduce the lateral displacement and settlement of the soil slope, stabilize the slope, eliminate q...

AI Technical Summary

Problems solved by technology

[0004] Light-duty wells and other pipelines are too long, with many branches and poor sealing, resulting in insufficient vacuum of the tube well, which affects the water yield; the quality control of the well completion of large-diameter tube wells (or deep wells) is more complicated, and the water yield of a single well is large, and mud and sand are easy to produce

[0005] The construction process of injection well points is relatively complicated, difficult to maintain, the supporting power is relatively large, and the operating energy consumption is relatively high; operational failures such as power outages and air leakage lead to blockage of well pipes and gradual decline in water output capacity, etc.

[0006] Especially for silty sand geology, if the conventional well point dewatering construction technology is used for construction, various problems will easily occur, such as insufficient vacuum, mud and sand production, etc., which will affect the construction

Images