川东红层缓倾角岩质崩塌特征与稳定性分析

川东地区出露一套湖相、河流相等红色碎屑岩，普遍发育着缓倾角岩质斜坡结构，由于其特殊工程特征和环境条件致使地质灾害频发，其中崩塌是主要灾害形式之一，并对人居安全与交通、城镇建设等具有较大危害。通过总结分析已有研究成果并结合大量野外工程地质测绘与岩体力学原理分析，提出基于川东地区环境背景条件的贯通型倾倒式、贯通型滑移式、非贯通型错断式和非贯通型拉裂式的四种基本崩塌类型，并对其岩性组合、斜坡结构特征、演变过程和安全性定量计算等进行系统总结，可为区内同类灾害的防治与研究提供借鉴与参考。 

CHARACTERISTICS AND STABILITY ANALYSIS OF ROCK COLLAPSE OF LOW-ANGLED RED-BED SLOPE IN EAST SICHUAN

A set of lacustrine and fluvial red clastic sedimentary rocks are exposed in east Sichuan, and the slope structures with low dip angles are widely distributed. Due to its special engineering characteristics and environmental conditions, geological hazards occur frequently, among which collapse is one of the main forms and a great threat to the safety of local residents, transportation, urban construction. By summarizing the previous research results and analyzing a lot of engineering mapping and geotechnical mechanics in the field, we proposed four kinds of basic collapse types based on the environment background conditions in east Sichuan, which are penetrating-topple, penetrating-slide, non-penetrating-shearfault and non-penetrating-pullfault. Their lithologic association characteristics, slope structure characteristics, evolution process and security quantitative evaluation are summarized systematically, which provide reference for the treatment and research of similar geological hazard in the region.