地下开挖地层沉降过程的控制机理研究

项目名称： 地下开挖地层沉降过程的控制机理研究

项目编号： No.51274258

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 段绍伟

作者单位： 中南林业科技大学

项目金额： 80万元

中文摘要： 随着地下开挖工程导致的灾难事故越来越多，开挖引起的地层位移与变形研究显得非常重要，目前的研究基本上都没有考虑地表建筑群的存在对于地表位移的影响，而且缺少对地层移动灾变发生机理和演化规律的深入认识。本项目采用模型试验、现场监测与数值模拟等手段，基于非线性动力学理论以及变位分配原理对地下洞室-地层-建筑物的相互作用关系以及建筑物安全控制进行系统研究。重点分析地下开挖引起的地层变形与传播规律，建立不同地层受开挖影响的沉降模式，揭示地下洞室周边建筑物对地层变形演化过程的影响规律。考虑周边建筑与地层变形的结构特点和时空效应，研究建筑群的地表位移控制技术，提出基于建筑物安全的地下洞室合理埋深优化方法。从典型安全事故和重大灾变的发生机理入手，分析影响地下开挖周边建筑物安全的主要诱发因素，建立建筑物安全风险辨识模式和分析模型。研究成果可以为地下开挖工程提供理论指导，具有重要的理论意义和广阔的应用前景。

中文关键词： 地下开挖；地层沉降；周边建筑；控制机理；

英文摘要： With more and more accident caused of underground excavation , the research of strata displacement and deformation become very important. Present study nearly consider the effect of the surface buildings for surface displacement, and the same as deep understanding of strata movement catastrophe occurring mechanism and evolution law. In this project, with methods as model test, field monitoring and numerical simulation are used, nonlinear dynamics theory and displacement distribution principle are based on, a systematic research for interaction relationship between underground caverns, formation, buildings and the buildings' safety control principle are proceeded. Strata deformation and propagation law in underground excavation are emphatically analyzed, settlement modal of different formation effected by excavation is established. Moreover, influence law of stratum deformation evolutionary process by overlying buildings is revealed . Structural characteristics and time-space effect for the overlaying buildings and stratum deformation are considered, surface displacement-control techniques and methods for building group are studied, and optimization methods for rational burying depth of underground cavern based on the safety of the building is proceeded. Starting with typical safety accidents and occurrence mech

英文关键词： Underground excavation；Strata settlement；Surrounding buildings；Control mechanism；