滑坡堵江动力过程的物理模型与数值模拟研究

Landslide blocking river is one of geological disasters that are widely distributed in the western mountainous areas of China, and it easily induces secondary disasters. It poses a serious threat to the people safety and project construction. It is necessary for national disaster prevention and mitigation to analysis the risk of landslide blocking river quantitatively. For this purpose, to understand the dynamic mechanism and to simulate quantitatively the process of landslide blocking river are key points. Therefore, the project proposed here is intended to study the landslide blocking river by using several approaches such as experimental investigation, theoretical analysis and numerical simulation, and from the “dynamic evolution” perspective. This project will: investigate the dynamic mechanism of landslide blocking river；build a physical model of landslide blocking river and develop the corresponding computation platform, aiming at simulating and quantitatively analyzing the process of landslide blocking river. This project will provide dependable theories and technology supports for the disaster prediction and risk assessment of landslide blocking river.

滑坡堵江是我国西部山区普遍存在的地质灾害之一，且极易诱发次生灾害，对山区人民安全及重大工程建设造成严重威胁，开展滑坡堵江灾害定量风险分析已成为国家防灾减灾的迫切需求。而要满足上述需求，关键在于认清滑坡堵江动力演化机理和达到滑坡堵江运动过程定量模拟。为此，本项目以滑坡堵江为研究对象，综合试验分析、理论研究和数值模拟等多种手段，从“动力演化”的角度，系统研究滑坡堵江运动过程的动力演化机理，构建滑坡堵江动力演进物理模型，开发可实现滑坡堵江演化过程模拟与定量分析的高效数值模拟平台，为滑坡堵江过程预测和风险评估提供可靠的理论依据及技术支撑。

滑坡堵江是我国西部山区普遍存在的地质灾害之一，且极易诱发次生灾害，对山区人民安全及重大工程建设造成严重威胁，开展滑坡堵江灾害定量风险分析已成为国家防灾减灾的迫切需求。而要满足上述需求，关键在于认清滑坡堵江动力演化机理和达到滑坡堵江运动过程定量模拟。为此，本项目以滑坡堵江为研究对象，综合试验分析、理论研究和数值模拟等多种手段，从“动力演化”的角度，开展了如下研究：（1）分析了滑坡堵江运动过程的动力演化机理，构建滑坡堵江动力演进物理模型；（2）开发了可实现滑坡堵江演化过程模拟与定量分析的高效数值模拟平台；（3）提出了可考虑河流冲刷条件下的滑坡堵江阈值判断经验公式；（4）实现了金沙江白格滑坡堵江、金沙江沃达潜在滑坡堵江等实际案例的全过程定量反演以及动力特征分析。上述研究成果可为滑坡堵江过程预测和风险评估提供可靠的理论依据及技术支撑。