吴江盛泽地区建筑荷载和地下水开采对地面沉降的影响
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摘要
为了准确分析建筑荷载和地下水开采对地面沉降的影响,为吴江盛泽地区科学防控地面沉降提供决策依据,基于比奥固结和地下水渗流理论,建立了建筑荷载和地下水开采与地面沉降三维全耦合有限元数值模型,分别模拟预测了在建筑荷载单独作用、地下水开采单独作用及建筑荷载和地下水开采叠加作用三种情况下,2015-09-01—2030-08-31盛泽地区逐年地面沉降变化趋势。结果表明,建筑荷载对盛泽地区地面沉降的影响大于地下水开采。第Ⅰ黏性土弱含水层和第I承压含水层分别为建筑荷载和地下水开采单独作用下的主压缩层,单层压缩量占比分别为43.04%和54.06%;第Ⅰ承压含水层及其上覆第Ⅰ黏性土弱含水层是二者叠加作用引发土体变形的主压缩层,其压缩量之和占总压缩量的71.30%。建筑荷载和地下水开采单独作用下引发的地面沉降量的线性叠加之和大于二者叠加作用下引发的地面沉降量,建筑荷载和地下水开采叠加作用引发的地面沉降具有耦合效应。
In order to provide decision-making basis for prevention and control of land subsidence in Shengze of Wujiang,the authors analyzed the influence of building load and groundwater exploitation on land subsidence.Based on the Biot's consolidation theory and ground water seepage theory,a threedimensional fully coupled mathematical model of building load,groundwater exploitation on land subsidence was established.By using this model,the trend of land subsidence was simulated from 2015-09-01 to 2030-08-31 under the conditions of only building load,only groundwater exploitation,and the superposition of building load and groundwater exploitation.According to the prediction results,the effect of building load on land subsidence in Shengze is greater than that of groundwater exploitation.With the first weak clayed soil aquifer and the first confined aquifer as the main compressible layers,under the individual action,the single-layer compression accounted for 43.04% and 54.06%respectively;while with the first confined aquifer and its overlying weak clay soil aquifer as the main compression layer of the superposition of the building load and the groundwater exploitation,the total compression amount accounted for 71.30%of the total compression.The sum of the linear superposition of ground subsidence caused by the building load and groundwater exploitation alone is larger than the ground subsidence caused by the superposition of the two.The land subsidence caused by the superposition of the building load and the groundwater exploitation has a coupling effect.
In order to provide decision-making basis for prevention and control of land subsidence in Shengze of Wujiang,the authors analyzed the influence of building load and groundwater exploitation on land subsidence.Based on the Biot's consolidation theory and ground water seepage theory,a threedimensional fully coupled mathematical model of building load,groundwater exploitation on land subsidence was established.By using this model,the trend of land subsidence was simulated from 2015-09-01 to 2030-08-31 under the conditions of only building load,only groundwater exploitation,and the superposition of building load and groundwater exploitation.According to the prediction results,the effect of building load on land subsidence in Shengze is greater than that of groundwater exploitation.With the first weak clayed soil aquifer and the first confined aquifer as the main compressible layers,under the individual action,the single-layer compression accounted for 43.04% and 54.06%respectively;while with the first confined aquifer and its overlying weak clay soil aquifer as the main compression layer of the superposition of the building load and the groundwater exploitation,the total compression amount accounted for 71.30%of the total compression.The sum of the linear superposition of ground subsidence caused by the building load and groundwater exploitation alone is larger than the ground subsidence caused by the superposition of the two.The land subsidence caused by the superposition of the building load and the groundwater exploitation has a coupling effect.
引文
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[18]彭国伦.Fortan95程序设计[M].北京:中国电力出版社,2005.Peng Guolun.Fortran 95[M].Beijing:China Electric Power Press,2005.
[2]Shi Xiaoqing,Fang Rui,Wu Jichun,et al.Sustainable Development and Utilization of Groundwater Resources Considering Land Subsidence in Suzhou,China[J].Engineering Geology,2011,124:77-89.
[3]于军,苏小四,朱琳,等.苏锡常地区地面沉降地质结构三维可视化模型虚拟现实系统研究[J].吉林大学学报(地球科学版),2007,47(2):393-399.Yu Jun,Su Xiaosi,Zhu Lin,et al.Research of 3DVisualized Strata Model Virtual Reality System of Land Subsidence in Suzhou-Wuxi-Changzhou Area[J].Journal of Jilin University(Earth Sicence Edition),2007,47(2):393-399.
[4]施小清,冯志祥,姚炳奎,等.苏锡常地区深层地下水禁采后土层变形特征分析[J].第四纪研究,2014,34(5):158-167.Shi Xiaoqing,Feng Zhixiang,Yao Bingkui,et al.Analysis of Deformation Characteristics of Soil Layer After Deep Groundwater Withdrawal in SuzhouWuxi-Changzhou Area[J].Quaternary Sciences,2014,34(5):158-167.
[5]Zhu Juyan,Guo Haipeng.Relation Between Land Subsidence and Deep Groundwater Exploitation in Cang Zhou City[J].Advanced Materials Research,2013,864/865/866/867:2213-2217.
[6]Larson K J,Ba爧agˇaogˇlu Mari1o H M A.Prediction of Optimal Safe Groundwater Yield and Land Subsidence in the Los Banos-Kettleman City Area,California,Using a Calibrated Numerical Simulation Model[J].Journal of Hydrology,2001,242(1/2):25-43.
[7]Chen Xingxian,Luo Zujiang,Zhou Shiling.Influences of Soil Hydraulic and Mechanical Parameters on Land Subsidence and Ground Fissures Caused by Groundwater Exploitation[J].Journal of Hydrodynamics:Series B,2014,26(1):155-164.
[8]孙晓涵,彭建兵,崔向美,等.山西太原盆地地裂缝与地下水开采、地面沉降关系分析[J].中国地质灾害与防治学报,2016,27(2):91-98.Sun Xiaohan,Peng Jianbing,Cui Xiangmei,et al.Relationship Between Ground Fissures,Groundwater Exploration and Land Subsidence in Taiyuan Basin[J].Chinese Journal of Geological Hazard and Control,2016,27(2):91-98.
[9]熊小锋,施小清,吴剑锋,等.弹塑性变形条件下抽水引起的地面沉降三维数值模拟[J].水文地质工程地质,2017,44(2):151-159.Xiong Xiaofeng,Shi Xiaoqing,Wu Jianfeng,et al.3DNumerical Simulation of Elasto-Plastic Land Subsidence Induced by Groundwater Pumping[J].Hydrogeology and Engineering Geology,2017,44(2):151-159.
[10]Cui Zhendong,Tang Yiqun.Land Subsidence and Pore Structure of Soils Caused by the High-Rise Building Group Through Centrifuge Model Test[J].Engineering Geology,2010,113(1):1-4.
[11]赵悦文.集群建筑荷载在地面沉降中的作用研究[D].北京:中国地质科学院,2017.Zhao Yuewen.Study onthe Role of Cluster Land Subsidence[D].Beijing:Chinese Academy of Geological Sciences,2017.
[12]付延玲,骆祖江,廖翔,等.高层建筑引发地面沉降模拟预测三维流固全耦合模型[J].吉林大学学报(地球科学版),2016,46(6):1781-1789.Fu Yanling,Luo Zujiang,Liao Xiang,et al.A ThreeDimensional Full Coupling Model to Simulate and Predict Land Subsidence Caused by Hihg-Rise Buliding[J].Journal of Jilin University(Earth Sicence Edition),2016,46(6):1781-1789.
[13]丁德民,马凤山,张亚民,等.高层建筑物荷载与地下水开采叠加作用下的地面沉降特征[J].工程地质学报,2011,19(3):433-439.Ding Demin,Ma Fengshan,Zhang Yamin,et al.Characteristics of Land Subsidence Due to Both High-Rise Building and Exploition of Groundwater in Urban Area[J].Journal of Engineering Geology,2011,19(3):433-439.
[14]钱家欢,殷宗泽.土工原理与计算[M].北京:水力水电出版社,1996.Qian Jiahuan,Yin Zongze.Principle and Calculation of Geotechnics[M].Beijing:Waterpower Press,1996.
[15]骆祖江,王琰,田小伟,等.沧州市地下水开采与地面沉降地裂缝模拟预测[J].水利学报,2013,44(2):198-204.Luo Zujiang,Wan Yan,Tian Xiaowei,et al.Simulating and Forecasting of Groundwater Exploitation,Land Subsidence and Ground Fissure in Cangzhou City[J].Journal of Hydraulic Engineering,2013,44(2):198-204.
[16]陈崇希,裴顺平.地下水开采-地面沉降模型研究[J].水文地质工程地质,2001,28(2):5-8.Chen Chongxi,Pei Shunping.Groundwater Pumping and Land Subsidence Model Research[J].Hydrogeology and Engineering Geology,2001,28(2):5-8.
[17]陈兴贤,骆祖江,金玮泽,等.高层建筑荷载、地下水开采与地面沉降耦合研究[J].应用基础与工程科学学报,2015,23(2):285-298.Chen Xingxian,Luo Zujiang,Jin Weize,et al.Study of High-Rise Building Load,Groundwater Seepage and Land Subsidengce[J].Journal of Basic Science and Engineering,2015,23(2):285-298.
[18]彭国伦.Fortan95程序设计[M].北京:中国电力出版社,2005.Peng Guolun.Fortran 95[M].Beijing:China Electric Power Press,2005.