等径桩、挤扩支盘桩相互作用系数数值研究  

Numerical Analysis on Pile-pile Interaction Coefficient Between Equal Pile,Squeezed Branch Pile

作　　者：丰土根[1,2] 宋海洋[1,2] 王路博 陈阳[1,2] 胡松[1,2] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [2]河海大学岩土工程研究所,南京210098

出　　处：《河南科学》2015年第10期1777-1781,共5页Henan Science

基　　金：国家自然科学基金项目(51009054);教育部科学技术研究重点项目(109077);江苏省自然科学基金资助项目(BK2010513)

摘　　要：采用Abaqus数值分析方法,建立双等径桩、一等径桩一支盘桩、双挤扩支盘桩模型,通过大量的数值模拟计算,分析在不同桩顶荷载、不同桩间距、不同土体泊松比条件下桩的相互影响系数以及在桩周荷载条件下对不同双桩的影响,分析表明,在线弹性变形阶段,桩与桩的影响系数近似为恒定值,与荷载水平及桩的性状无关,进入塑性阶段后,则逐渐减小最后趋于0,随着泊松比的变大,桩之间的相互作用系数逐渐减小,在相同条件下,桩周荷载对双支盘桩的影响大于双等径桩且随泊松比的增大而减小.研究结果为实际工程中桩之间的影响情况提供参考.Using Abaqus numerical analysis method, double equal piles, one equal pile and one squeezed branch pile, double squeezed branch piles models were built. Through lots of numerical simulation, analysis of the pile interaction coefficient under different situations, including pile load, pile spacing, soil Poisson＇ s ratio and analysis of the influence to different double piles in surrounding load were carried out. Result shows that the pile-pile influence coefficient is approximately constant value in liner elastic deformation of loading piles, and irrelevant to the load level and piles characters, but it decreased gradually until close to 0 in plase state, with the Poisson＇ s ratio becomes large. The interaction coefficient gradually decreases, under the same conditions, the surrounding load have a greater impact on double equal piles than double squeezed branch piles and gradually decreases with the increase of poisson＇ s ratio. The study provides a reference in practical engineering between different piles.

关 键 词：Abaqus数值分析 等径桩 挤扩支盘桩 相互作用系数 

分 类 号：TU470[建筑科学—结构工程]