预应力管桩单桩水平承载力的试验判定标准探讨

Test standards for lateral capacity of single PHC pile

结合上海软土地区4个场地15根单桩水平静载荷试验,研究预应力管桩在水平荷载作用下的受力性状。根据试验实测数据,探讨预应力管桩单桩水平承载力的试验判定标准,认为对于配筋率较低且不允许出现裂缝的预应力桩应结合临界荷载和水平允许变形值10 mm对应荷载综合确定。并通过ABAQUS有限元软件,探讨不同型号预应力管桩水平承载特性,从中得到一些结论为今后上海地区单桩水平承载力的设计和理论研究提供参考。

Based on the horizontal static load tests on 15 single pile of 4 sites in Shanghai,the bearing capacity of PHC piles under the action of horizontal load is studied.According to the test data,the standards for the horizontal static load tests are discussed.The prestressed piles with low reinforcement ratio and without cracks should be determined according to the corresponding load combined with the critical load and horizontal allowable deformation value of 10 mm.Through the finite element software ABAQUS,the horizontal bearing properties of different types of prestressed pipe piles are discussed.This study will be useful for the design of horizontal bearing capacity of single pile.