水平地震作用下饱水岩石边坡抗倾覆稳定性计算  

Calculation of anti-overturning stability of saturated rock slope under horizontal seismic loading

作　　者：年廷凯[1] 刘长欣[1] 李翔[1] 张彦君[1] 彭果[1] 

机构地区：[1]大连理工大学土木水利学院及海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《世界地震工程》2014年第2期57-62,共6页World Earthquake Engineering

基　　金：国家自然科学基金(No.51179022);地质灾害防治与地质环境国家重点实验基金(SKLGP2010K005)

摘　　要：地震区岩石边坡的倾覆破坏及倾覆稳定性评价问题目前还较少涉及,没有相应的解析方法可供参考。基于力矩平衡原理,推导了坡顶含张裂缝的饱水岩石边坡,在水平拟静力地震荷载下的抗倾覆稳定系数解析表达式;通过变动参数的比较分析,绘制了饱水岩石边坡抗倾覆稳定系数与边坡几何要素之间的关系曲线和稳定图,进而可直接查取图表获得边坡的抗倾覆稳定性安全系数;在此基础上,提出了水平地震荷载下饱水岩石边坡的倾覆临界曲线,从而实现了快速查取工程边坡的抗倾覆安全系数和定性评判边坡的倾覆稳定状态,为地震区岩石边坡的抗倾覆稳定性评价提供了科学依据。The current research involves scarcely with the overturning failure and the assessment of stability againstoverturning for the rock slope in seismic zone. There is not corresponding analytical approach can be referred.Based on the moment equilibrium principle, this paper derives the analytical formulation of anti-overturning stabilityfactor of saturated rock slope with a tension crack in slope top and subjected to horizontal pseudo-static seismicloading. Comparative analyses by variation of parameters were carried out, and the corresponding curves expressingthe relationship between anti-overturning stability factor and geometric parameters of saturated rock slope weredrawn to directly obtain the anti-overturning stability factor from the achieved design charts. On the basis of this,the overturning critical curves for saturated rock slope subjected to horizontal seismic loads were made to rapidlyjudge and evaluate the overturning stability state of rock slope. This study provides a scientific basis for rock slopeagainst overturning in seismic active zone.

关 键 词：水平地震力 饱水岩石边坡 倾覆破坏 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]