震裂边坡稳定性极限分析  

Limit analysis on stability of cracked slopes induced by earthquake

作　　者：丁瑜[1,2] 邹晓东[3] 党超[1,2] 

机构地区：[1]三峡大学土木与建筑学院,湖北宜昌443002 [2]三峡大学三峡库区地质灾害教育部重点实验室,湖北宜昌443002 [3]四川高速公路建设开发总公司,四川成都635000

出　　处：《中国地质灾害与防治学报》2011年第2期45-49,54,共6页The Chinese Journal of Geological Hazard and Control

基　　金：国家自然科学基金项目(41002100);中国科学院知识创新项目(KZCX2-YW-332);水利部公益性行业专项经费项目(200801032)

摘　　要：地震导致山体大范围开裂松动,使岩体裂缝(隙)张开、扩展进而形成危险的震裂边坡。裂缝是控制震裂边坡变形破坏的切割边界和滑移边界,为此,考虑裂缝扩展、裂缝充水和地震影响,采用极限分析上限法对汶川地震震中附近的一实地震裂边坡的稳定性变化进行分析。计算结果揭示了随裂缝扩展延伸,在雨水、地震作用影响下震裂边坡稳定性变化规律,为类似边坡的分析评价与工程治理提供了理论依据。Earthquake shocking inevitably bursts and shatters mountainous slopes. Because rock cracks （fractures） open and propagate influenced by earthquake, mountainous slope becomes the dangerous cracked slope. For such slope, the crack is the cutting and slip boundaries that control the slope failure. In this paper, limit analysis upper bound method is applied to analysize stability of specific cracked slope induced by Wenchuan earthquake in prospective of crack propagation, water inflow in crack and earthquake. The calculation reveals the variation of slope stability influenced by precipitation and earthquake in the process of crack propagation. This study provides a theoretical basis for evaluation and engineering protection of such cracked slopes.

关 键 词：地震 开裂边坡 极限分析 稳定系数 

分 类 号：P642.22[天文地球—工程地质学]