上海地区单桩水平承载力的若干影响因素研究

结合上海软土地区12个场地57根单桩水平静载荷试验，研究建筑桩基单桩在水平荷载作用下的受力特点。根据试验实测数据，探讨不同桩径、不同试验加载方法及灌芯对预应力空心桩受力性状影响等因素，认为建筑工程中，可选择桩径较大或者采用在桩顶一定范围内扩大桩径的做法进行单桩水平承载力优化设计，试验加载方式建议可采用单向单循环恒速水平加载法，预应力空心桩顶部灌芯可作为水平承载力的安全储备，为软土地区类似工程的单桩水平承载力的设计和理论研究提供参考。

Research on influencing factors of lateral capacity of single pile in Shanghai

Based on the horizontal static load tests on 57 single-piles of 12 sites in Shanghai, the bearing capacity of single pile under the action of horizontal load is studied. According to the test data, the effects of different pile diameters, and different loading methods and grouted pile stress characteristics of prestressed hollow are explored. For the architectural engineering, the larger pile diameter or the pile diameter enlarging top within a certain range are suggested to optimize the design of horizontal bearing capacity of singe pile. The loading test is suggested by the single cycle constant speed horizontal loading method; the safety of prestressed hollow core can be used as filling pile top horizontal bearing capacity. The study results will be useful for the design of lateral bearing capacity of single pile.