黄土斜坡渗透冲蚀发展及其失稳模式预测研究

项目名称： 黄土斜坡渗透冲蚀发展及其失稳模式预测研究

项目编号： No.41272283

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： 林鸿州

作者单位： 长安大学

项目金额： 70万元

中文摘要： 黄土高原是我国重要的国土区域，随着我国西部经济的发展及工程活动的加强，黄土滑坡灾害已成为黄土地区人居与城镇建设安全的重大隐患。然而，受到黄土渗透冲蚀作用的影响，许多的黄土滑坡具有隐蔽性特点，导致了灾难性后果，因此如何减轻和防治具隐蔽性特征的黄土滑坡灾害显得十分迫切和必要。本项目通过工程地质学、土力学、水力学与泥沙动力学等多学科领域的整合研究手段，研究并揭示渗透冲蚀作用对黄土滑坡诱发机理与成灾模式的内在联系关系，建立基于渗流-管流耦合分析的黄土斜坡渗透冲蚀发展的理论模型，研究渗透冲蚀作用下黄土斜坡的稳定性、滑坡失稳模式与演化发展过程。通过项目研究，以期能有效解决困扰黄土滑坡灾害防灾减灾规划的隐蔽性问题，为日后黄土地区的城镇建设、工程建设及防灾减灾作出贡献。

中文关键词： 渗透；潜蚀；非饱和土；黄土；滑坡

英文摘要： The Loess Plateau is an important cultural and geological resources area in China. However, loess landslides sometimes are very dangerous and induce catastrophic hazards owing to the special characteristics of loess. As the economy develops, they threaten more and more people's lives and property. Hence, the strategy of sustainable development in loess area is already restrained by loess landslides. Based on previously observation, the internal erosion which was caused by seeping water is the main causal factor of catastrophic loess landslide. If we don't understand the mechanism of landslide which was caused by seepage erosion very clearly, we can't present to adequate control measures for mitigation of loess landslides especially in catastrophic cases. Therefore, the integrated research which combines engineering geology, soil mechanics, hydraulic mechanics and sediment dynamics is used to clarify the generation and evolution of seepage erosion phenomena which preceded the loess landslides. Using engineering geology analysis, the nature between landslides and seepage erosion is acknowledged more effective. Using laboratory tests, the hydraulic mechanics and mechanics characteristics of loess are realized more definitely. Using model tests, the seepage deformation and erosion development patterns of loess lands

英文关键词： seepage；internal erosion；unsaturated soil；loess；landslide