川西高原红军山危岩崩塌变形特征及稳定性分析

川西高原受青藏高原新生代持续隆升和河流快速下切作用，形成大量的坡度高陡、坡型复杂，岩体破碎的岸坡和陡崖。红军山危岩崩塌具有规模大、分布范围广、破坏模式多样、力学机制复杂等特点。本文在工程地质测绘的基础上，调查了危岩的分布范围、规模大小、破坏特征，研究了危岩的破坏模式，对不同模式进行了稳定性计算。主要认识有：①岩体结构具有明显的区域性和分带性。②危岩产生及破坏模式表现为块体失稳、阶梯状滑动。③根据危岩体发育特征，变形破坏力学机制，考虑天然、暴雨、地震3种工况进行稳定性计算。最大的危岩体，隆聋危岩在天然工况下处于稳定状态，暴雨和地震工况下稳定系数明显降低，处于基本稳定-不稳定状态。其他危岩体在各种工况下稳定性较差，处于基本稳定-不稳定状态。④对危岩体进行清除、加固、监测，雨季巡排查等预防措施。

DEFORMATION CHARACTERISTICS AND STABILITY ANALYZE OF HONGJUNSHAN DANGEROUS-ROCKS AND SLUMPING IN WESTERN SICHUAN PLATEAU

Affected by Qinghai-Tibet Plateau rapid uplifted and the river fast incised in Western Sichuan plateau since Cenozoic, where develop more and more bank slope and steep cliff that have the characters of high and steep、complex slope type、 and broken rock. Hongjunshan Dangerous-rock Slumping has the characters of large-scale、wide distribution、diversity failure pattern and complex mechanics. On the basis of engineering geological mapping, this paper investigates the distribution of dangerous rock, size, damage characteristics, failure mode, studies for different modes and stability calculates of the dangerous-rocks. Main knowledge:(1) the rock mass structure has obvious regional and zonality.(2) the generation and dangerous rock destruction are mainly block instability, ladder shaped sliding.(3) stability of dangerous-rocks are calculated for considering natural, rainstorm, earthquake conditions according to the characteristics of development、mass deformation and failure mechanics. Biggest dangerous rock mass, the lung deaf dangerous-rock, is stability under natural conditions. But is primary stability to instability under conditions of heavy rains and earthquake. Others are mainly instability under three conditions.(4) We suggest that some prevention measures should be taken, such as remove reinforcement, monitoring and the rainy season cruise screening for dangerous-rocks.