固体潮汐对边坡稳定性系数的影响及其时间效应的研究  

Effects of earth tide on slope stability and its time correlation

作　　者：刘裕华[1] 陈征宙[1] 蒋鑫[1] 张明瑞[1] 

机构地区：[1]南京大学地球科学与工程学院,江苏南京210093

出　　处：《岩土工程学报》2011年第8期1260-1264,共5页Chinese Journal of Geotechnical Engineering

摘　　要：固体潮汐的研究是地球物理领域的研究热点,与地震预报的联系也十分紧密。借鉴固体潮汐与地震相关性的研究成果,建立了弹性地球模型,从固体潮理论出发,推导出地表潮汐应力的表达式。通过在常见的边坡破坏模式稳定性系数计算公式加入固体潮汐应力的作用,并选取典型算例,阐述固体潮对边坡稳定性及其时间效应的影响,论证了边坡的稳定性具有日周期变化的特征,提出在边坡防护的设计中应适当的考虑固体潮汐带来的影响。The researches on time of landslide occurrence have been the hotspot in the landslide area,and most of them mainly focus on the rainfall season.However,few scientists consider the diurnal period properties of slope stability caused by earth tide.The earth tide is always the hotspot in the geophysics field,and it relates to earthquakes strongly.The formulas for tidal stress at the surface of earth are derived by modifying a simplified elastic earth model based on the earth tide theory.The effect of earth tides on slope stability and its time correlation are discussed by considering the tidal stress in the formulas for safety factor of slope stability commonly used,and typical slopes in Nanjing City are taken as examples.The suggestion of taking the effects of earth tide into account in the protection of slopes is proposed.

关 键 词：固体潮汐 潮汐应力 触发 时间效应 边坡稳定性系数 日周期特征 

分 类 号：TU432[建筑科学—岩土工程]