Water-level-reducing and draining structure with horizontal sand wells around foundation pit, and water-level-reducing and draining method

Abstract

The invention relates to a water-level-reducing and draining structure with horizontal sand wells around a foundation pit, and a water-level-reducing and draining method. The water-level-reducing anddraining structure with the horizontal sand wells around the foundation pit comprises a plurality of vertical sand wells arranged around the foundation pit at intervals, and the one or more horizontalsand wells arranged around the foundation pit, the horizontal sand wells are located in an aquifer where the foundation pit is located, the horizontal sand wells are connected with the vertical sandwells and further connected with a plurality of vertical tube wells, the vertical tube wells comprise water filtering sections and water storage sections, the boundary between the water filtering sections and the water storage sections is located on a bottom interface of the lowest horizontal sand well or is lower than the bottom interface of the lowest horizontal sand well, and the water storagesections are internally provided with water pumping equipment. When the purpose of water level reducing and draining of the foundation pit are achieved, the positions of bottom interfaces of the adopted horizontal sand well structures are very shallow, the depths of the bottom interfaces of the adopted horizontal sand well structures are far less than the depths of vertical well points, thus pumping of more irrelevant groundwater is avoided, and a series of problems caused by excessive pumping of the groundwater and deep groundwater can be relieved and even well solved.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a dewatering and dewatering structure of a horizontal sand well around a foundation pit and a dewatering and dewatering method. Background technique [0002] The foundation pit dewatering mainly adopts the method of pumping water at vertical well points around the perimeter of the foundation pit to reduce the water level of the foundation pit. However, due to the depth of the funnel of the vertical well point dewatering, the depth of the well point is often required to reduce the water level of the foundation pit to the elevation required by the project. Very large, for example, the dewatering wells of foundation pits with a depth of 7-9m in a certain area are usually set up to 20-25m. For such a deep well point, the aquifer crossed is often multi-layered, and some aquifers in the lower part have negligible impact on the foundation pit, but the groundwater still needs to be p...

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Problems solved by technology

[0004] In order to overcome the problems of large total precipitation, steep precipitation soaking line, easy dredging, piping, and uneven ground settlement caused by the vertical well point pumping method in the prior art for foundation pit dewatering, the present invention provides an environmental protection system. The dewatering and dewatering structure of horizontal sand well in foundation pit and the dewatering and dewatering method

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