多层结构含水层系统土体变形机理和地面沉降预测

项目名称： 多层结构含水层系统土体变形机理和地面沉降预测

项目编号： No.41272303

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 王旭东

作者单位： 南京工业大学

项目金额： 68万元

中文摘要： 地面沉降灾害已成为影响区域经济社会可持续发展的重要因素之一，为有效遏制地面沉降的恶化趋势，实现地面沉降灾害的科学防治，本课题以工程建设中多层结构含水层系统地下水引起的地面沉降为研究对象，综合运用理论分析、物理实验、数值模拟相结合的方法，开展地下水引起含水层系统土体变形机理和流固耦合作用下地面沉降预测方法的研究。旨在通过对含水层系统土体应力状态的分析，开展真实反映含水层土体应力路径的室内试验，揭示地下水位变化诱发土体变形的规律；开展多层结构含水层系统物理模型试验，探究多层结构含水层系统中土体变形的分布规律和水土相互作用机理；提出含水层系统地下水流和流固耦合地面沉降计算模型的三维半解析数值分析法，系统揭示多场作用下含水层系统的地下水流动规律和土体变形规律；建立符合多层结构含水层系统土体变形规律的地面沉降简化计算方法，为地下水引起的地面沉降灾害的科学调控与合理评价提供理论指导和技术支持。

中文关键词： 地面沉降；地下水；流固耦合；半解析数值法；含水层系统

英文摘要： Land subsidence disasters have become one of important factors affecting the regional economic and the sustainable social development. In order to curb the deteriotion of land subsidence effectively and to achieve the scentific cure for land subsidence disasters, the land subsidence due to groundwater withdrawal during the enigneering construction processes will be studied in this project, the multiple approaches including theoretical analysis,physical experiments and numerical simulation are used to investigate the deformation mechanism of soil in multi-aquifer system caused by groundwater withdrawal and also to build a land subsidenc prediction method which considers the coupling of the flow and deformation. Aim at reveal the laws of soil deformation induced by groundwater changes, the stress path laboratory testes will be carried out to simulate the soil stress state in multi-aquifer system. Based on the physical model test of the multi-layer aquifer systems, the distribution mode of its soil deformation and the interaction law between soil and water in multi-layer aquifers are explored. A three-dimensional semi-analytical numerical analysis method for modeling the groundwater flow and coupled flow and deformation in multi-aquifer system is presented to investigate the law of groundwater flow and soil deforma

英文关键词： land subsidence；groundwater；coupled flow and deformation；semi analytical numerical method；multi-aquifer system