贵州遵义官井边坡变形破坏机制分析  

Deformation Mechanism of Guanjing Slope in Zunyi,Guizhou

作　　者：周学琴[1] 林锋[1] 彭义[1] 史岩[1] ZHOU Xue-qin LIN Feng PENG Yi SHI Yan(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection （Chengdu University of Technology）, Chengdu 610059, P. R. China)

机构地区：[1]地质灾害防治与地质环境保护国家重点实验室(成都理工大学),成都610059

出　　处：《科学技术与工程》2016年第34期149-157,共9页Science Technology and Engineering

基　　金：973计划项目(2013CB733201)资助

摘　　要：基于对贵州省遵义市官井边坡工程地质条件、边坡基本特征及边坡变形破坏特征分析,可知官井边坡是在自身不利的条件下,由于斜坡Ⅳ段坡脚开挖到878 m,4#楼内侧边坡坡脚处揭露泥岩夹层导致边坡沿泥化夹层发生滑移变形。据此建立了官井边坡变形演化机制的概念模型,结合三维数值模拟方法研究了边坡变形破坏机制,将边坡变形演化过程划分为3个阶段:岩层顺层滑移、坡脚应力相对集中阶段;边坡开挖过程中卸荷回弹变形阶段;边坡深切,坡体中顺层"压力拱"形成阶段。The engineering geological conditions was analyzed, basic characteristics and characteristics of de- formation of Guanjing slope in Zunyi, Guizhou. The geological conditions of Guanjing slope was disadvantageous, the excavation to 878 m at the toe of slope and explosion mudstone interlayer at 4# floor inside the toe of slope led to deformation. The conceptual model of deformation mechanism of Guanjing slope was established, and numerical simulation of the deformation mechanism was analyzed qualitatively. The deformation process of the slope can be di- vided into three stages： Stratum occurred bedding slip, then stress concentration at the toe of slope; unloading re- bound deformation appeared in the process of excavation;＂ pressure arch ＂formed in the process of cutting.

关 键 词：官井边坡 概念模型 演化机制 数值模拟 压力拱 

分 类 号：P642.22[天文地球—工程地质学]