基于加权残值法和统一强度理论抗滑桩合理锚固深度的确定方法  

DETERMINATION METHOD OF THE RATIONAL ANCHORAGE LENGTH OF ANTI-SLIDE PILE BASED ON UNIFIED STRENGTH THEORY AND WEIGHTED RESIDUAL METHOD

作　　者：陈昌富[1] 肖淑君[1] 

机构地区：[1]湖南大学岩土工程研究所,长沙410082

出　　处：《工业建筑》2009年第1期85-89,共5页Industrial Construction

基　　金：教育部博士点基金资助项目(20050532021);交通部西部项目资助项目(200631880237);湖南省建设科技项目资助项目(200615)

摘　　要：引入统一强度理论以考虑中主应力的影响,推导出抗滑桩锚固段桩侧土容许抗力计算公式。同时,利用半解析半数值的加权残值法计算抗滑桩锚固段桩侧所需抗力,并提出一种合理确定抗滑桩锚固深度的新方法。将提出的方法应用于两个计算实例,得到桩侧所需抗力的分布和不同统一强度参数下桩侧土容许抗力值的分布,并通过两者的对比分析确定合理锚固深度。计算结果表明,采用统一强度理论分析计算得到的桩侧土容许抗力随统一强度参数b的增大而增大。Unified strength theory is introduced to consider the influence of intermediate principal stress, the calculation formula of allowable soil resistance on anchorage section of anti-slide piles is deduced. Meanwhile, the semi-analytical and semi-numerical weighted residual method is used to calculate the required soil resistance on anchorage section of anti-slide piles, and a new rational method to determine anti-slide anchorage length is put forwarded. The proposed method is applied to two calculation examples, the distribution of required soil resistance on piles and distribution of allowable soil resistance with different unified strength parameters are obtained, the rational anchorage length is determined by comparative analysis of the distribution diagrams. The analysis result also shows that the allowable soil resistance on piles which is gained by unified strength theory increases with unified strength parameter b.

关 键 词：抗滑桩 统一强度理论 锚固深度 桩侧抗力 加权残值法 

分 类 号：TU473.1[建筑科学—结构工程]