岩土工程学报Issue(1)：35-46,12.DOI:10.11779/CJGE201501003
考虑滑动过程内部崩解耗散的滑坡体运动模型
Mobility assessment model for landslide mass considering disintegration energy consumption in slipping process
摘要
Abstract
The mobility assessment model for landslide mass can be used in calculating the speed, sliding distance, impact energy and affected area of landslide. It’s the key technology for risk assessment of landslide. In the conventional methods, the landslide mass is usually assumed as the mass point or rigid block, and the dynamic assessment process does not take the disintegration energy consumption into account. An assessment model for landslide mass in slipping process considering the disintegration energy consumption is proposed. In the model, the landslide mass is assumed as a system consisting of two mass points and a dashpot, and the slipping process is simplified as a deformation body in plan motion. Furthermore the stress-strain characteristics of landslide mass follow the rules of soil residual strength from repeated direct shear tests. The motion equations of the mobility assessment model and the relevant formula for calculating viscosity resistance force of the dashpot are established. The equation is used to deduce the formula for intensity indexes (including slipping velocity, impact energy and sliding distance). As a case study, a landslide project is analyzed to illustrate this mobility assessment model. The results show that the proposed model conforms to the energy transformation rules of landslide mass, and its results are closer to the reality than those of the conventional methods. It is more convenient than the numerical methods.关键词
滑坡灾害/风险评估/滑距评估/滑动冲击能Key words
landslide/risk assessment/sliding distance assessment/impact energy分类
建筑与水利引用本文复制引用
吴越,刘东升,周忠浩..考虑滑动过程内部崩解耗散的滑坡体运动模型[J].岩土工程学报,2015,(1):35-46,12.基金项目
国家自然科学基金项目（51308576）；中国博士后科学基金项目（2014M552324）；重庆市博士后科研项目特别资助项目 （）
