流固耦合在深层承压水降水及环境影响分析中的应用
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摘要
深层承压水是影响深层地下工程施工安全及周边环境安全的主要因素之一,准确预测并合理控制承压水风险非常重要。本文在流固耦合计算理论基础上,结合上海某地铁车站基坑项目的场地抽水试验结果,建立了三维有限元模型,通过对场地水位降深及降水引起的地面沉降进行模拟并与实测结果对比,验证了流固耦合方法在深层承压水降水及环境影响分析中的适用性,同时获取了较为合理的深层承压含水层水文地质参数,为本工程后续基坑降水开挖提供支持,对分析上海类似地层条件中工程降水及降水引起的周边地面沉降控制也具有参考意义。
Deep confined water has been one of the main factors that affect the safety of underground works and the surrounding environment. It is very important to predict and control the risk of confined water accurately. Based on the theory of fluid solid coupling, a three-dimensional finite element model is established in combination with the field pumping test of a subway station project in Shanghai. The depth of the ground water level and the land subsidence caused by pumping water is simulated and compared with the actual measurement. This is then used to verify the applicability of the fluid-solid coupling method in deep confined water precipitation and environmental impact analysis. Following this, reasonable hydrogeological parameters are obtained, which provide parameter support for analyzing the subsequent excavation of the project, and a certain reference value for analyzing the land subsidence caused by the engineered precipitation in Shanghai and other locations with similar stratum conditions.
Deep confined water has been one of the main factors that affect the safety of underground works and the surrounding environment. It is very important to predict and control the risk of confined water accurately. Based on the theory of fluid solid coupling, a three-dimensional finite element model is established in combination with the field pumping test of a subway station project in Shanghai. The depth of the ground water level and the land subsidence caused by pumping water is simulated and compared with the actual measurement. This is then used to verify the applicability of the fluid-solid coupling method in deep confined water precipitation and environmental impact analysis. Following this, reasonable hydrogeological parameters are obtained, which provide parameter support for analyzing the subsequent excavation of the project, and a certain reference value for analyzing the land subsidence caused by the engineered precipitation in Shanghai and other locations with similar stratum conditions.
引文
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[11]贾亚杰,梁发云,崔振东,等.基于层间位移协调的承压水降压引起土层变形分析[J].岩土力学,2016,37(S1):42-48.Jia Y J,Liang F Y,Cui Z D,et al.Analysis of soil deformation caused by decompression of confined water based on displacement coordination condition[J].Rock and Soil Mechanics,2016,37(S1):42-48.
[12]陈锋,王春江,周岱.流固耦合理论与算法评述[J].空间结构,2012,18(4):55-63.Chen F,Wang C J,Zhou D.Review of theory and numerical methods of fluid-structure interaction[J].Spatial Structures,2012,18(4):55-63.
[13]唐益群,石亚朝,周洁.城市发展与地面沉降控制耦合协调模型研究[J].上海国土资源,2017,38(3):62-65,69.Tang Y Q,Shi Y C,Zhou J.Coupling coordination model research of urban development and land subsidence control[J].Shanghai Land&Resources,2017,38(3):62-65,69.
[2]常安定,李佩成.用割离井公式反求水文地质参数的直线图解法[J].西北农林科技大学学报(自然科学版),2006,34(4):135-138.Chang A D,Li P C.The flow jacob linear graphic method of converse calculating the hydrogeology parameters with the isolated-well formulas[J].Journal of Northwest A&F University(Natural Science Edition),2006,34(4):135-138.
[3]蒋辉.基于Aquifer Test的抽水试验参数计算方法分析[J].水文地质工程地质,2011,38(2):35-38.Jiang H.An analysis of parameter calculation through pumping tests based on the Aquifer Test[J].Hydrogeology&Engineering Geology,2011,38(2):35-38.
[4]赵琳琳,肖长来,陈昌亮,等.基于抽水试验的多种方法确定水文地质参数[J].地下空间与工程学报,2015,11(2):306-309,357.Zhao L L,Xiao C L,Chen C L,et al.Determination of hydrogeological parameters by a variety of methods based on the pumping test[J].Chinese Journal of Underground Space and Engineering,2015,11(2):306-309,357.
[5]刘金宝.基于三维水土耦合数学模型的深基坑降水优化设计[J].上海国土资源,2014,35(4):123-126.Liu J B.Optimum design of foundation pit dewatering based on a3D water–soil coupling mathematical model[J].Shanghai Land&Resources,2014,35(4):123-126.
[6]娄荣祥,周念清,赵姗.上海地铁11号线徐家汇站深基坑降水数值模拟[J].地下空间与工程学报,2011,7(5):908-913.Lou R X,Zhou N Q,Zhao S.Numerical simulation of deep foundation pit dewatering of Xujiahui station of Shanghai Metro Line No.11[J].Chinese Journal of Underground Space and Engineering,2011,7(5):908-913.
[7]陈晓恋,张美雁,文章,等.裂隙含水层水文地质参数反演——以黑龙江七台河市应急水源地为例[J].水文地质工程地质,2014,41(5):32-37.Chen X L,Zhang M Y,Wen Z,et al.Application of numerical simulation to estimate the hydraulic parameters in fractured media:A case study in emergency water area of Qitaihe city,Heilongjiang province[J].Hydrogeology&Engineering Geology,2014,41(5):32-37.
[8]黄应超,徐杨青.深基坑降水与回灌过程的数值模拟分析[J].岩土工程学报,2014,36(S2):299-303.Huang Y C,Xu Y Q.Numerical simulation analysis of dewatering and recharge process of deep foundation pits[J].Chinese Journal of Geotechnical Engineering,2014,36(S2):299-303.
[9]龚晓南,张杰.承压水降压引起的上覆土层沉降分析[J].岩土工程学报,2011,33(1):145-149.Gong X N,Zhang J.Settlement of overlaying soil caused by decompression of confined water[J].Chinese Journal of Geotechnical Engineering,2011,33(1):145-149.
[10]梁发云,贾亚杰,邓航,等.深基坑降水沉降计算土体弹性参数取值方法探讨[J].岩土工程学报,2017,39(S2):29-32.Liang F Y,Jia Y J,Deng H,et al.Discussions on elastic parameters of soil for land subsidence caused by decompression of confined aquifer in deep excavation[J].Chinese Journal of Geotechnical Engineering,2017,39(S2):29-32.
[11]贾亚杰,梁发云,崔振东,等.基于层间位移协调的承压水降压引起土层变形分析[J].岩土力学,2016,37(S1):42-48.Jia Y J,Liang F Y,Cui Z D,et al.Analysis of soil deformation caused by decompression of confined water based on displacement coordination condition[J].Rock and Soil Mechanics,2016,37(S1):42-48.
[12]陈锋,王春江,周岱.流固耦合理论与算法评述[J].空间结构,2012,18(4):55-63.Chen F,Wang C J,Zhou D.Review of theory and numerical methods of fluid-structure interaction[J].Spatial Structures,2012,18(4):55-63.
[13]唐益群,石亚朝,周洁.城市发展与地面沉降控制耦合协调模型研究[J].上海国土资源,2017,38(3):62-65,69.Tang Y Q,Shi Y C,Zhou J.Coupling coordination model research of urban development and land subsidence control[J].Shanghai Land&Resources,2017,38(3):62-65,69.