| Study on Deep Well Dewatering Optimization Design in Deep Foundation Pit and Engineering Application |
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| 作者姓名： | HuChunlin Yanghuijun |
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| 作者单位： | InstituteofRockandSoilEngineering,WuhanUniversityofTechnology,Wuhan430070 |
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| 基金项目： | This paper is supported by the Hubei Construct Science Foundation of China (G200013). |
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| 摘 要： | Based on analyses of the theories of groundwater unsteady flow in deep well dewatering in the deep foundation pit,Theis equations are chosen to calculate and analyze the relationship between wa-ter level drawdown of confined aquifer and dewatering duration.In order to reduce engineering cost and diminish detrimental effect on ambient surrounding,optimization design target function based on the control of confined water drawdown and four restriction requisitions based on the control of safe water level,resistance to throwing up from the bottom of foundation pit,avoiding excessively great subsidence and unequal surface subsidence are proposed.Adeep well dewatering project in the deep foundation pit is optimally designed.The calculated results including confined water level drawdown and surface subsid-ence are in close agreement with the measured results,and the optimization design can effectively control both surface subsidence outside foundation pit and unequal subsidence as a result of dewatering.
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| 关 键 词： | 深基坑 井点降水 地表沉陷 优化设计 深井泵降水法 |
Study on Deep Well Dewatering Optimization Design in Deep Foundation Pit and Engineering Application |
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| HuChunlin Yanghuijun.Study on Deep Well Dewatering Optimization Design in Deep Foundation Pit and Engineering Application[J].Journal of China University of Geosciences,2002,13(1):78-82. |
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| Authors: | Hu Chunlin YANG Huijun |
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| Abstract: | Based on analyses of the theories of groundwater unsteady flow in deep well dewatering in the deep foundation pit, Theis equations are chosen to calculate and analyze the relationship between water level drawdown of confined aquifer and dewatering duration. In order to reduce engineering cost and diminish detrimental effect on ambient surrounding, optimization design target function based on the control of confined water drawdown and four restriction requisitions based on the control of safe water level, resistance to throwing up from the bottom of foundation pit, avoiding excessively great subsidence and unequal surface subsidence are proposed. A deep well dewatering project in the deep foundation pit is optimally designed. The calculated results including confined water level drawdown and surface subsidence are in close agreement with the measured results, and the optimization design can effectively control both surface subsidence outside foundation pit and unequal subsidence as a result of dewatering. |
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| Keywords: | deep foundation pit deep well dewatering drawdown surface subsidence optimization design |
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