输电线路挤扩支盘灌注桩受力特性研究  

Research on Mechanics Characteristics of Squeezed Branch Piles in Transmission Line Engineering

作　　者：肖琦[1] 王德弘[1,2] 徐晶[1] 

机构地区：[1]东北电力大学建筑工程学院,吉林吉林132012 [2]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《水电能源科学》2013年第10期189-191,238,共4页Water Resources and Power

基　　金：吉林省科技发展计划基金资助项目(201105061)

摘　　要：针对基桩实际受力情况,采用数值模拟方法,构建了单桩和低承台多桩有限元模型,通过与相同地层条件、荷载条件及相同桩径的普通灌注桩进行对比分析,对挤扩支盘桩在竖向和水平荷载共同作用下受力性能进行了研究。结果表明,竖向上拔荷载和水平荷载存在明显的荷载耦合效应,挤扩支盘多桩中的群桩效应比等直径桩多桩显著,桩间距为5d时最小基桩效应系数为0.9。Aiming at the actual load of foundation pile, numerical simulation method is used to establish the finite ele- ment model of single pile and low cushion cap piles. Under the vertical and horizontal load, mechanics characteristics of squeezed branch pile are studied by comparing with the ordinary piles at the same stratums, load and diameter condition. The results show that the coupling effect of vertical uplifting load and horizontal load is significant the piles group effect of squeezed branch piles is more obvious than the equal diameter pile when the pile spacing is 5 d, the minimum effect coefficient of pile foundation is 0.9.

关 键 词：挤扩支盘灌注桩 受力特性 组合荷载 有限元分析 

分 类 号：TU528.31[建筑科学—建筑技术科学]