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| 高层建筑荷载引发地面沉降与隆起变形三维数值模拟 | |
| 引用本文： | 付延玲,金玮泽,陈兴贤,谈金忠.高层建筑荷载引发地面沉降与隆起变形三维数值模拟[J].吉林大学学报(地球科学版),2014,44(5):1587-1594. |
| 作者姓名： | 付延玲 金玮泽 陈兴贤 谈金忠 |
| 作者单位： | 1.河海大学地球科学与工程学院，南京210098; 2.江苏省地质矿产勘查局，南京210018; 3.江苏南京地质工程勘察院，南京210041 |
| 摘 要： | 针对地下水埋深较浅地区，由高层建筑荷载引起的土体变形问题，以比奥固结理论为基础，结合土体非线性流变理论，将土体本构关系推广到黏弹塑性；同时考虑土体力学参数及水力参数的动态变化关系，建立了高层建筑荷载引发地面沉降与隆起变形的三维有限元数值模型，详细研究了高层建筑荷载影响下的土体变形特征及此过程中土体力学参数及水力学参数的变化特征。结果表明：由高层建筑荷载引起的地面沉降呈现漏斗状，以建筑物中心为漏斗中心，高层建筑荷载施加初期，高层建筑周围出现隆起，到达最大值后隆起逐渐消失；高层建筑底部浅层土体孔隙度、渗透系数及泊松比均呈现缓慢减小趋势，弹性模量呈现缓慢增大趋势；而高层建筑周围浅层土体的孔隙度、渗透系数及泊松比呈现先增大后减小的变化趋势，弹性模量则呈现先减小后增大的变化趋势；高层建筑影响区域浅部土体参数的变化趋势与土体的回弹及压缩有关。 |
| 关 键 词： | 高层建筑荷载 地下水渗流 地面沉降 隆起变形 比奥固结理论 三维全耦合模型 参数变化 |
| 收稿时间： | 2013-12-12 |
Three-Dimensional Numerical Simulation of Land Subsidence and Upheaval Deformation Caused by High-Rise Building Load |
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| Fu Yanling,Jin Weize,Chen Xingxian,Tan Jinzhong.Three-Dimensional Numerical Simulation of Land Subsidence and Upheaval Deformation Caused by High-Rise Building Load[J].Journal of Jilin Unviersity:Earth Science Edition,2014,44(5):1587-1594. | |
| Authors: | Fu Yanling Jin Weize Chen Xingxian Tan Jinzhong |
| Institution: | 1.School of Earth Science and Engineering，Hohai University，Nanjing210098，China; 2.Bureau of Geology Mineral Resources Prospecting of Jiangsu Province，Nanjing210018，China; 3. Jiangsu Nanjing Institute of Geo Engineering Investigation，Nanjing210041，China |
| Abstract: | Aiming at soil deformation caused by high-rise building load in the region where groundwater buried depth is more shallow, based on the Biot’s consolidation theory and combined with the nonlinear rheological theory of soil, the constitutive relation of soil was extended to viscoelastic plasticity, and the dynamic change relationship of mechanics parameters and hydraulic parameters with pore water pressure was also considered, a three dimensional finite element numerical model of land subsidence and upheaval deformation caused by high-rise building load was established. The characteristics of soil deformation that was affected by high-rise building load and variation characteristics of soil mechanics parameters and hydraulic parameters in this process were studied and analyzed in detail. It is shown that land subsidence caused by high-rise building load is funnel-shaped and the funnel center is high-rise building center. At the early stage of application of high-rise building load, land upheaval appears around building, and land upheaval disappears gradually after land upheaval reached the maximum value. The change trend of porosity,hydraulic conductivity and Poisson’s ratio of shallow soil under high-rise building performs an evolution of decreasing. But the change trend of modulus of elasticity performs an evolution of increasing.Porosity,hydraulic conductivity and Poisson’s ratio of shallow soil around high-rise building performs the tendency of increasing firstly and then decreasing. Modulus of elasticity performs the tendency of decreasing firstly and then increasing. The change trend of shallow soil parameters around the high-rise building is related to the upheaval and the compression of soil. |
| Keywords: | high-rise building load groundwater seepage land subsidence upheaval deformation Biot’s consolidation theory three-dimensional full coupling model parameter variation |
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