砂土中支盘桩静载模型试验及数值模拟  

Numerical simulation and static load model tests of squeezed branch piles in sands

作　　者：王成武[1] 佘跃心[1] 龚成中[1] 

机构地区：[1]淮阴工学院建筑工程学院,江苏淮安223001

出　　处：《工程勘察》2015年第8期11-14,98,共5页Geotechnical Investigation & Surveying

基　　金：江苏自然科学基金面上项目(BK2011406)

摘　　要：在自制的可视化模型箱内,进行了挤扩支盘桩静载模型试验,分析了等截面桩和不同承力盘数量的支盘桩在静载作用下的荷载—变形特性以及桩周土体位移场的分布规律,并利用有限元软件ABAQUS对支盘桩在静载下的受压过程进行了数值模拟。模型试验结果和数值模拟均表明:支盘桩比等截面桩的承载力大,承载力的提高随承力盘数量的增加而增加,而且支盘桩能有效减小沉降;支盘桩不同位置承力盘作用的发挥有明显的时序性。试验得到的一些结论可以为支盘桩设计及其工程应用提供理论依据。The static load model tests of squeezed branch pileshave been carried out in a visual model box. The displacement field of the soil around the squeezed branch piles and loading-deformation are observed and analyzed subjected to the static loads for the squeezed branch piles with the equal-diameter and with different numbers of bearing plates. The compression process is numerically simulated by using the finite element software ABAQUS. The results of the model tests and numerical simulation show that compared with the equal-diameter pile, the squeezed branch pile is much better with higher bearing capacity and less settlement. The bearing capacity increases when the numbers of bearing plates become more and the squeezed branch piles can effectively reduce the settlement. Moreover, the load transfer of the squeezed branch piles has time effectiveness and the roles the bearing disks are unsynchronized. The findings could provide theoretical basis for the design and application of saueezed branch niles.

关 键 词：支盘桩 静载 模型试验 数值模拟 时序性 

分 类 号：TU47[建筑科学—结构工程]