三峡库区滑坡治理中抗滑桩锚固深度的研究  

Study on Anchorage Length of Anti-slide Pile in Landslide Prevention in the Three Gorges Reservoir Area

作　　者：周春梅[1] 殷坤龙[1] 

机构地区：[1]中国地质大学工程学院,武汉430074

出　　处：《武汉理工大学学报》2006年第2期38-41,共4页Journal of Wuhan University of Technology

基　　金：教育部博士点基金(20030491004);国家自然科学基金(40072084)

摘　　要：分析了三峡库区滑坡治理中抗滑桩锚固深度一般取桩长的1／2～1／3存在的问题。用弹性地基系数法，计算了弹性桩作用于桩侧岩土体的应力。滑动面为倾斜面时，对桩前岩体中存在的不利结构面进行抗滑稳定性验算，得出抗滑桩的最小锚固深度，提出了根据桩周岩土体的性质来确定桩侧岩土体的横向容许承载力。工程实例表明：桩的锚固深度的确定可以依据桩的不同结构形式，稳定地层的强度，滑坡推力，桩的刚度，桩的截面和间距及是否考虑桩前滑体的抗力等因素综合确定。The technique anti-piles was an effective measure in landslide control works, which nowadays had wide applica- tion in the fields of geo-hazard control in the reservoir area of Three Gorges Project in China. Usually, the pile＇s anchorage length was 1/2-- 1/3 of the pile＇ s length. This paper analyzed existent problems on anti-sllde pile＇ s anchorage length as the experience. By elastic foundation coefficient method, this paper calculated lateral stress that elastic pile acts on surrounding rock soil. Rock＇s transverseallowable bearing value is classified and confimled according to its engineering geological characters. When the sliding surface was gradient not even, the minimum anchorage length is given by checking the safety against sliding of adverse structural unit in the rock. A case of project showed that anchorage length of anti-slide pile was confirmed synthetically by some factors, such as pile＇s different structural form, strength of stabilized stratum, landslide thrust, pile＇s bending rigidi- ty, section and space between piles,and slice resist force before piles.

关 键 词：滑坡治理 锚固深度 容许承载力 地基系数 预应力锚索抗滑桩 

分 类 号：TU312[建筑科学—结构工程]