鸡尾山高速远程滑坡运动特征及数值模拟分析

摘要

This paper is based on detailed geological survey of the Jiweishan landslide .It analyzes the characteristics of landslide geological environment background, slide source characteristics and deposition area.It discusses the movement characteristics of three phases including the landslide instability, collision and sliding accumulation.It establishes the geological model of Jiweishan landslide.It takes the advantage of DAN-3D numerical simulation software.The landslide is simulated by choosing the FVF combination model on the motion characteristics .It finally gets the landslide accumulation, scraping area and sliding distance features.Through analysis and comparison, the simulation results are consistent with the actual situation.So this analysis method can be used for early assessment and prediction of disaster area to provide technical support for rapid and long run-out landslide.%本文在对鸡尾山高速远程滑坡的详细地质调查的基础上，分析了该滑坡地质环境背景特征、滑源区特征和堆积区特征。将滑坡后破坏运动主要分为失稳下滑、碰撞解体和滑行堆积3个阶段的运动特征，建立鸡尾山高速远程滑坡运动特征的地质模型。结合 DAN－3D 数值软件，选用 FVF 组合模型对该滑坡的运动特征进行了模拟，最后得到了滑坡堆积、铲刮区域和滑动距离等方面的特征。通过对比分析，鸡尾山滑坡模拟后的运动特征与所建立的地质模型基本符合，模拟的堆积形态与实际情况基本一致。由此可以说明，该分析方法可以为高速远程滑坡成灾范围进行早期评估及预测，为该类滑坡的研究提供一定的帮助。