桩基码头岸坡整体稳定分析的修正  

MODIFICATIONS TO GLOBAL STABILITY ANALYSIS ON SLOPE OF PILED FOUNDATION WHARF

作　　者：周锡礽[1] 王乐芹[1] 王晖[1] 朱福明[2] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津港务局,天津300456

出　　处：《岩石力学与工程学报》2005年第4期681-686,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(59909005);博士点基金项目(20020056030)

摘　　要：针对桩基码头的岸坡稳定问题,在考虑了桩本身的特性和桩土相互作用的条件下,提出一种修正基桩抗滑效应的桩基码头岸坡整体稳定的计算方法,同时,采用了遗传算法确定最危险滑动面及其对应的最小安全系数,由此对现有规范中的相关规定提出了修正。该方法考虑圆弧滑动面,采用简化Bishop法计算岸坡稳定的安全系数,并在其中考虑基桩的抗滑作用;采用一种基于极限分析理论的方法确定滑动面以上的土体对桩的侧推力,对不同的圆弧位置,由各基桩的埋置深度及其与岸坡具有不同的安全系数确定其所能发挥的最大抗滑力;通过相关工程算例的计算与比较,表明本方法简便、快捷,且结果良好。A methodology is proposed for the global stability analysis on slope of piled foundation wharf, in which the interaction of piles and soil is considered, and some modifications to the existing design codes are presented. Genetic algorithm is employed in searching for the potential circular slip surface that has minimum safety factor. The circular slip surface is assumed and Bishop simplified method incorporating the stabilization effect of piles is adopted to calculate the safety factor of slope. An existing method based on the plasticity theory is used to determine the lateral forces acting on the pile section above the critical surface. The maximum stabilizing force of each pile is determined according to its embedded depth under different position of slip circle. In the presented methodology, the piles and slope can adopt different safety factors. By the calculations and comparisons on concerning engineering examples, the method is proved to be convenient, rapid and effective for the slope and pile system.

关 键 词：士力学 桩基码头 岸坡整体稳定 桩土相互作用 简化BISHOP法 遗传算法 

分 类 号：TP183[自动化与计算机技术—控制理论与控制工程] TU432[自动化与计算机技术—控制科学与工程]