静钻根植竹节桩抗压承载性能  

Performance of static drill rooted nodular piles under compression

作　　者：周佳锦 龚晓南[1] 王奎华[1] 张日红 

机构地区：[1]浙江大学滨海与城市岩土工程研究中心,浙江杭州310058 [2]浙东建材集团,浙江宁波315000

出　　处：《浙江大学学报（工学版）》2014年第5期835-842,共8页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(50879077)

摘　　要：为了对静钻根植竹节桩荷载传递机理及承载性能进行研究,进行现场静载试验和ABAQUS有限元建模计算.通过有限元模拟结果与现场试验结果的对比,验证所建立数值模型的可靠性.模拟结果表明:在静钻根植工法中运用竹节桩构成的组合桩基比运用PHC管桩构成的组合桩基的承载力高,且随着自身节间距的增加,竹节桩的承载力有所减小,但减小幅度不大;静钻根植竹节桩承载力受桩周水泥土强度的影响不大;水泥土—桩周土界面摩擦系数是影响组合桩承载力的一个重要因素;在实际工程中,存在一个合理的水泥土半径取值范围.A series of field tests and finite element software ABAQUS were used to investigate the behavior of the static drill rooted nodular pile under compression. The simulation results were assumed to be reliable through the comparison with the measured results. The simulation results showed that： the bearing capacity of the nodular pile is higher than the bearing capacity of the pipe pile when using the static drill rooted method; the bearing capacity of the composite pile decreases with the increasing distance of adjacent nodes, while the decrement value is small; the strength of the cemented soil along the shaft has little influence on the bearing capacity of the composite pile; the friction coefficient of the cemented soil-soil interface is an important factor for the behavior of the composite pile under compression; a reasonable range for the radius of the cemented soil is proposed in practical projects.

关 键 词：静钻根植工法 竹节桩 荷载传递机理 承载力 ABAQUS三维建模 

分 类 号：TU47[建筑科学—结构工程]