长江科学院院报2018，Vol.35Issue(6)：92-97,106,7.DOI:10.11988/ckyyb.20161287
双排桩支护结构抗倾覆稳定性改进计算与分析
Stability Against Overturning of Supporting Structure with Double-row Piles:Improved Calculation and Analysis
摘要
Abstract
An improved method for calculating the anti-overturning safety factor of supporting structure with double-row piles is presented.The method takes into consideration the influence of compressive resistance of first-row pile and uplift resistance of back-row pile coupled with groundwater buoyance.The calculation methods for anti-overtur-ning safety factor of double-row piles and gravity retaining structure in different specifications in China are com-pared.The compositions of overturning force and overturning resistance are also analyzed.The calculation results of engineering cases show that compared with the results calculated by specification formulas,the anti-overturning safety factor calculated by the present method could improve by 20％-55％.The influence factors of anti-overtur-ning safety factor are analyzed by a self-developed software,and the results indicate that with the increase of built-in depth of supporting pile,the anti-overturning safety factor of double-row pile decreased firstly but then increased. The impacts of the torque generated by the coupling between compressive resistance of first-row pile and uplift re-sistance of back-row pile on the safety factor weakened.Moreover,with the increase of array pitch,the anti-overtur-ning safety factor increased approximately linearly,and impacts of the torque generated by the coupling between compressive resistance of first-row pile and uplift resistance of back-row pile on the safety factor strengthened.关键词
深基坑/双排桩/抗倾覆稳定性/嵌固深度/桩排距Key words
deep foundation pit/double-row piles/stability against overturning/built-in depth/array pitch分类
建筑与水利引用本文复制引用
李松,马郧,张德乐,李受祉,刘佑祥,张晓玉..双排桩支护结构抗倾覆稳定性改进计算与分析[J].长江科学院院报,2018,35(6):92-97,106,7.基金项目
武汉市"黄鹤英才(专项)计划"资助项目(文号武人才[2014]10) （专项）
武汉市城乡建设委员会科研项目(201546,文号武城建[2015]191 ) （201546,文号武城建[2015]191 ）
