工程地质学报2012，Vol.20Issue(3)：334-339,6.
东河口高速远程滑坡-碎屑流全程动力特性模拟
NUMERICAL SIMULATION OF DYNAMIC BEHAVIOR OF DONGHEKOU ROCKSLIDE-DEBRIS AVALANCHE
摘要
Abstract
The rockslide-debris avalanche is a geological disaster of great danger and always causes disastrous ca tastrophes because of its high velocity and unexpected long runout. Scholars in China had made a lot of forward-loo king results for the high-speed rockslide-debris flows after Wenchuan Earthquake. A majority of the research results on this field have not been widely accepted due to itself complication. This paper takes the Donghekou rockslide-debris avalanche in Qingchuan County triggered by Wenchuan Earthquake as example to reveal the moving mecha nism of rockslide-debris avalanches. The dynamic analysis software of DAN-W is applied to the creation of threedifferent rheological models. They are Friction model, Voellray model and" F-V" model to simulate on the motion be havior of flow slides and put an emphasis on the travel distance, speed characteristics at different intervals, distri bution of the deposits. The volume and duration are estimated. The results reveal that applying different rheological models to different moving stages have reasonable results. The Friction model is better to simulate the landslide at set-out phase and short-runout phase. The Voellmy model has advantages of simulating flow debris at long run-out phase. The two-rheological model "F-V "provides the best simulation of the Donghekou rockslide-debris avalanche movement. The best fitting rheological parameters friction angle φ= 18°,friction coefficient μ = 0. 1 and turbulence parameter ξ = 400m·s‐ 2 have been found by the back analysis.关键词
东河口滑坡-碎屑流/流变模型/DAN-W数值模拟Key words
Donghekou rockslide-debris avalanche/ Rheological model/ DAN-W numerical simulation/ Wen-chuan Earthquake分类
天文与地球科学引用本文复制引用
齐超,邢爱国,殷跃平,李滨..东河口高速远程滑坡-碎屑流全程动力特性模拟[J].工程地质学报,2012,20(3):334-339,6.基金项目
国家科技支撑项目(2006BAC04B02),国家自然科学基金资助项目(40602035),国土资源大调查计划项目(1212011014032)和上海市重点学科建设资助项目(B208). （2006BAC04B02）
