液化土层中桩基抗震性能研究  

SEISMIC RESISTANCE OF PILE FOUNDATION IN LIQUEFACTION LAYER

作　　者：冯士伦[1] 王建华[1] 郭金童[1] 

机构地区：[1]天津大学岩土工程研究所,天津300072

出　　处：《岩石力学与工程学报》2005年第8期1402-1406,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家高技术研究发展计划(863计划)项目(2002AA615080)

摘　　要：通过振动台试验,研究了饱和砂土中桩基的振动特性,对桩土振动过程中的动力相互作用有了初步的认识。根据试验结果,得到距模型桩不同位置处的砂土的动力p-y曲线与API推荐做法得到的静力p-y曲线,并对两者进行了比较,说明了饱和砂土液化降低了模型桩的横向承载能力,但并没有使模型桩的横向承载能力完全丧失。提示工程设计人员在对可液化砂层的横向承载能力进行考虑时,完全不考虑可液化砂层的横向承载能力是偏于保守的。The behavior of the model pile in the liquefying saturated sand layer during shake is studied through the shake table test, and some results about the soil-pile dynamic interaction are obtained. According to the test results, the dynamic and static behavior of reaction force and displacement of the saturated sand in different depth is analyzed and compared. The lateral resistance of the soil decreases after the sand has liquefied, but it does not lose completely. So it is conservative that the lateral resistance of the liquefied soil is not considered when the pile in the liquefied soil is designed.

关 键 词：土力学 砂土 液化 桩基础 振动台试验 桩-土相互作用 

分 类 号：TU473.1[建筑科学—结构工程]