岩土力学Issue(7)：2004-2012,9.
高速岩质滑坡启动弹冲加速机制及弹冲速度计算--以武隆县鸡尾山滑坡为例
Starting-elastic-impulsive acceleration mechanism of high-speed rockslide and elastic-impulsive velocity calculation:Taking Jiweishan rockslide in Wulong, Chongqing for example
摘要
Abstract
Starting-elastic-impulsive acceleration mechanism of high-speed rockslide is the foundation of carrying out the research of full course dynamics mechanism of high-speed rockslide. The starting-elastic-impulsive acceleration mechanism of high-speed rockslide is systematically expounded and attributed to two acceleration effects of energy release of sliding zone and energy release of locking block. In order to explore the releasing law of elastic strain energy in rock, cyclic loading and unloading tests of rock are carried out. Meanwhile, the results are applied to calculate the releasable elastic energy for determining elastic-impulsive velocity. Considering the problems in determining the elastic-impulsive velocity in current methods, a new formula for calculating starting-elastic-impulsive velocity is deduced based on the constitutive equation of the sliding zone and the releasing law of elastic strain energy in rock. Jiweishan rockslide is studied using this new method. The results show that starting kinetic energy is mainly provided by the elastic energy of sliding zone rather than the elastic energy of locking block. The total starting-elastic-impulsive velocity of Jiweishan rockslide is 1.261 1 m/s. Finally, the extreme velocity ranges from 2.6 to 4.4 m/s obtained by a generalized sliding model.关键词
高速岩质滑坡/动力学机制/弹冲加速效应/弹冲速度/锁固原理/鸡尾山滑坡Key words
high-speed rockslide/mechanism of dynamics/elastic-impulsive acceleration effect/elastic-impulsive velocity/theory of locking-up/Jiweishan landslide分类
天文与地球科学引用本文复制引用
邹宗兴,唐辉明,熊承仁,刘晓,倪卫达,葛云峰..高速岩质滑坡启动弹冲加速机制及弹冲速度计算--以武隆县鸡尾山滑坡为例[J].岩土力学,2014,(7):2004-2012,9.基金项目
国家重点基础研究发展计划(973)项目(No.2011CB710606)；国家自然科学基金项目(No.41272309)；中国地质调查局西部地区复杂山体成灾机制研究项目(No.1212011014030)。 （973）
