Rapid dewatering device and method for multi-aquifer-multi-aquifer layer-crossing submerged well

A technology of aquitards and aquifers, applied in the fields of geological engineering, geotechnical engineering, and underground engineering, can solve problems such as uncoordinated work, large differences in aquifer permeability, and impact on the construction period, and achieve the effect of accelerating the drainage process

Active Publication Date: 2021-11-09
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the distribution of soil layers in the actual project site may be more complicated. For example, there are multiple aquifers and multiple aquifers, and the permeability of the aquifer may also vary greatly. , which is not coordinated with the work of the depressurization-drying well in the lower layer, which may cause the problem of slow precipitation and affect the construction period

Method used

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  • Rapid dewatering device and method for multi-aquifer-multi-aquifer layer-crossing submerged well
  • Rapid dewatering device and method for multi-aquifer-multi-aquifer layer-crossing submerged well

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Embodiment 1

[0027] like figure 1 As shown, in the multi-aquifer-multi-aquifer system 11, there are low-permeability aquifer 1, aquifer 3 and high-permeability aquifer 2 ( High-permeability aquifer 2 is more permeable, and low-permeability aquifer 1 is less permeable). The depressurization-drainage well has a good drainage effect when pumping the lower aquifer, but the drainage effect of the shallow dewatering well is poor. In this system, only the depressurization-drainage well and the dewatering of the upper dewatering well will affect the overall dewatering of the foundation pit speed.

[0028] like Figure 1~2 As shown, the present embodiment is used for the multi-aquifer-multi-aquifer rapid dewatering device, including a shallow dewatering well 5 for drainage of a low-permeability aquifer 1 and a shallow drain well 5 for a high-permeability aquifer. 2 decompression-drainage wells 4 for drainage (preferably in this embodiment, depressurization-drainage wells 4 and shallow dewatering...

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Abstract

The invention relates to a rapid dewatering device and method for a multi-aquifer-multi-water-resisting layer-crossing submerged well. A low-permeability aquifer, an aquitard, and a high-permeability aquifer exist in sequence; the rapid dewatering device consists of a shallow dewatering well for drainage of the low-permeability aquifer and a depressurization for drainage of the high-permeability aquifer -drain wells, also includes sub-drain wells arranged around step-down-drain wells, having boreholes drilled through low-permeability aquifers, high-permeability aquifers, and aquitards in between , used to connect low-permeability aquifers and high-permeability aquifers, forming up and down water channeling. Compared with the prior art, the present invention introduces the process of penetrating submerged wells in the multi-aquifer-multi-aquifer system separated by water-stop curtains, which can significantly speed up the drainage process, and can provide a new idea for the foundation pit dewatering construction process.

Description

technical field [0001] The invention belongs to the technical fields of geological engineering, geotechnical engineering, and underground engineering, and relates to a method for setting a layer-penetrating borehole to accelerate dewatering during the dewatering construction process of an engineering site, in particular to a method for multi-aquifer-multi-water-resisting layers A rapid dewatering device and method for a layer-crossing submerged well. Background technique [0002] In the construction environment with a relatively high groundwater level, dewatering at the well point is an important technical measure in the construction of earthworks, foundations and foundation works. It can reduce the lateral displacement and settlement of the slope soil, stabilize the slope, eliminate quicksand, reduce the uplift of the base soil, so that the foundation and foundation engineering construction below the natural groundwater can avoid the influence of groundwater, provide relati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/10
CPCE02D19/10
Inventor 王建秀薛睿刘笑天何倩倩龙冠宏武昭徐娜
Owner TONGJI UNIV
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