株洲二线船闸深基坑双排桩结构的受力特性  

Force characteristics of double row piles in deep foundation pit of Zhuzhou second ship lock

作　　者：邹开明 姜兴良[3] 王勤振 ZOU Kai-ming;JIANG Xing-liang;WANG Qin-zhen(Hunan Water Transport Construction Investment Group Co.,Ltd.,Changsha 410011,China;Changsha University of Science and Technology,Changsha 410114,China;CCCC Water Transportation Consultants Co.,Ltd.,Beijing 100007,China)

机构地区：[1]湖南省水运建设投资集团有限公司,湖南长沙410011 [2]长沙理工大学,湖南长沙410114 [3]中交水运规划设计院有限公司,北京100007

出　　处：《水运工程》2019年第3期83-88,共6页Port & Waterway Engineering

摘　　要：对株洲航电枢纽二线船闸高挡土环境中的双排桩结构变形及内力特征,采用数值计算和工程观测相结合的方法,分析不同桩径、不同开挖深度时结构的变形及受力形态。结果表明:双排桩排距取3倍桩径时,不同开挖深度的前排桩最大位移值呈现二次抛物线形态;前排桩内力呈现单锚板桩的受力特征,后排桩内力呈现悬臂板桩的受力特征;通过设置卸荷板、采用抗剪强度大的材料回填可有效控制结构变形及内力。About the structural deformation and internal force characteristics of double-row piles in high retaining soil environment,we apply the numerical calculation and engineering observation methods,and analyze the deformation and force patterns of structures at different pile paths and different excavation depths.The results show that the maximum displacement of the front row piles with different excavation depths presents a secondary parabola when the pile spacing is taken 3 times the diameter of the pile.The internal force of the front pile presents the force characteristics of the single anchor board pile and the internal force of the rear pile presents the force characteristics of the cantilever board pile.The deformation and internal force of the structure can be controlled effectively by setting the unloading plate and using the material backfill with high shear strength.

关 键 词：双排桩 支挡结构 内力 位移 

分 类 号：U643.2[交通运输工程—船舶及航道工程]