云南地区环境与工程因素诱发滑坡的力学机制研究

项目名称： 云南地区环境与工程因素诱发滑坡的力学机制研究

项目编号： No.U1402231

项目类型： 联合基金项目

立项/批准年度： 2015

项目学科： 管理科学

项目作者： 盛谦

作者单位： 中国科学院武汉岩土力学研究所

项目金额： 200万元

中文摘要： 云南省滑坡地质灾害既受独特的地貌地质条件控制，又受地震、降雨与工程扰动等环境与工程因素强烈影响，致灾机理复杂，是亟待突破的理论与技术难题。本项目拟以滑坡相关研究成果为基础，以云南昭通—会泽、丽江—香格里拉高速公路为依托工程，通过多学科交叉融合，提出基于多因素耦合作用的滑坡分级方法、地震与降雨等环境荷载的力学模式，表征滑坡的地质结构与荷载作用特征；发展土石混合体力学性质试验方法、多因素耦合作用下滑坡变形与破坏的物理与数值模拟方法，分析滑坡变形破坏的地质结构、应力渗流耦合、荷载作用时序等效应，揭示环境、工程荷载及其耦合作用下滑坡失稳的力学机制；构建滑坡变形、应力、安全裕度随地质结构、环境与工程荷载的演化方程，探讨滑坡失稳临界条件与判据，形成基于地质、荷载特征与失稳机制的滑坡稳定多因素协同评价方法，从而有效提升我国滑坡失稳机制与防治的研究水平，为云南地质灾害防治与工程建设提供理论与技术支持。

中文关键词： 云南；滑坡；环境荷载；失稳；力学机制

英文摘要： Landslides in Yunnan Province, are not only controlled by the unique geological landforms conditions, but also strongly affected by the earthquake, rainfall and other environmental engineering disturbances and engineering factors. Mechanism leading to disaster is very complicated, it is the theoretical and technical problem urgent to break. The project is based on the related researching results of landslides, relyons on Zhaotong to Huize and Lijiang to Shangri-La highway projects in Yunnan, by multi-disciplinary integration, propose classification methods of landslides based on the coupling of multiple factors, mechanic patterns of environmental loads of rainfall and earthquakes, Characterize the features of geological structure and load of landslides, develop mechanical test methods of mixture of earth and rock, and the methods of physical and numerical simulation of deformation and failure of landslides under multivariate coupling, analyze the effects of the geological structure, stress seepage coupling and timing of loads deformation and failure of landslides, reveal the mechanical properties and the mechanism failure of the mixture of earth and rock, and the mechanism of landslides under the effect of environment and engineering disturbance loads, and coupling of them, construct the evolution equations of and deformation, stress and margin of safety with the geological structure, environment and engineering loads of landslides, discuss critical conditions and criterions of instability of slope and form the methods of collaborative evaluation of variety of factors of landslide stability based on geological, load characteristics and instability mechanisms. so as to effectively improve the research level of instability theory and the prevention and treatment of the landslide in China, provide theoretical and technical supports for geological disaster prevention and constructions of Yunnan Province in China.

英文关键词： Yunnan;landslide;environmental load;instability;mechanical mechanism