Prevents silt from clogging the dewatering wells of the sump pumps

Abstract

The invention discloses a dewatering well capable of preventing sludge from blocking a water suction pump. The dewatering well includes a well pit, and a first iron wire filter screen, a buffer layer,a second iron wire filter screen, a pea grit layer, a first pipe body, a second pipe body and an inverted-circular-truncated-cone-shaped pipe body which are sequentially arranged from outside to inside along the radial direction of the well pit in a sleeving way; the buffer layer comprises a non-woven fabric layer, a sponge layer and a gauze layer which are sequentially laid from outside to inside in the radial direction of the well pit; an annular cavity is formed between the first pipe body and the second pipe body; and a water pumping pipe is located in the inverted-circular-truncated-cone-shaped pipe body. The dewatering well further includes a cohesive soil layer, a bottom sealing piece, a plurality of water outlet pipes located in the cavity and evenly arranged on the side wall of the first pipe body, and a plurality of water inlet pipes located in the cavity and evenly arranged on the side wall of the second pipe body; the plurality of water outlet pipes enable the pea grit layer to communicate with the cavity, and the fixed ends of the water outlet pipes are higher than the free ends of the water outlet pipes; and the plurality of water inlet pipes enable the cavity to communicate with the second pipe body, and the fixed ends of the water inlet pipes are higher than the free ends of the water inlet pipes. The dewatering well has the beneficial effects that sludge entering the second pipe body is reduced, and the second pipe body is prevented from being damaged by the water pumping pipe.

Description

technical field [0001] The invention relates to the field of underground engineering construction. More specifically, the present invention relates to a dewatering well that prevents silt from clogging a sump pump. Background technique [0002] In complex urban underground engineering construction, when the groundwater level is high, foundation pit excavation construction will cut off the underground aquifer, and groundwater will enter the foundation pit under the influence of pressure, which will bring safety hazards to the construction. If the dewatering and drainage treatment is not carried out in time, there will be serious water accumulation, which will deteriorate the construction environment. At the same time, it will also lead to a decrease in the bearing capacity of the overall rock formation around the project, and finally lead to various safety accidents such as piping, quicksand, and collapse in the foundation pit. Construction safety poses a great threat. [0...

AI Technical Summary

Problems solved by technology

[0002] In the complex urban underground engineering construction, when the groundwater level is high, the foundation pit excavation construction will cut off the underground aquifer, and the groundwater will enter the foundation pit under the influence of pressure, which will bring safety hazards to the engineering construction

If the dewatering and drainage treatment is not carried out in time, there will be serious water accumulation, which will deteriorate the construction environment. At the same time, it will also lead to a decrease in the bearing capacity of the overall rock formation around the project, and finally lead to various safety accidents such as piping, quicksand, and collapse in the foundation pit. Great threat to construction safety

[0003] Usually, the method of digging a dewatering well is used to dewater. During the dewatering construction, it is usually only filled with mung bean sand for filtration. The water entering the central part still contains a lot of silt. When the pump works for a long time, it is easy to cause pipeline blockage. In addition , the suction pipe of the suction pump extends into the dewatering well pipe, and the dewatering pipe keeps swinging, which can easily damage the dewatering well pipe, and also cause soil to enter the dewatering well, silting the dewatering well and the dewatering pump, causing the dewatering well and the dewatering pump to be scrapped. Bring great trouble to the construction

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