软土中桩顶水平承载离心模型试验  

CENTRIFUGAL MODEL TEST OF PILE TOP UNDER LATERAL LOADS IN SOFT SOIL

作　　者：居俊[1,2] 

机构地区：[1]常熟理工学院工程管理系,江苏常熟215500 [2]东南大学交通学院,南京210096

出　　处：《工业建筑》2017年第8期100-105,共6页Industrial Construction

基　　金：国家自然科学基金项目(51608059);住房和城乡建设部科技项目(2016-K5-060)

摘　　要：为研究软土中刚性桩水平承载性状,设计开展了离心机试验,分析不同桩端情况和截面形状刚性桩水平承载特性及桩土相互作用。结果表明:闭口桩的水平承载力大于开口桩;桩土响应处于线弹性阶段时,水平荷载-桩顶位移曲线与桩端类型和截面形状无关;桩身材料、桩端开口形式及桩入土深度相同时,H形桩水平承载力最大,而圆形桩最小。综合分析试验结果表明:归一化桩顶水平荷载-桩顶水平位移曲线符合指数函数关系。The horizonal bearing capacity characteristic and pile-soil interaction with different tip conditions,crosssection of pile,and drainage conditions for the rigid pile under the action of lateral load were investigated by centrifugal model tests. The results showed that the horizontal bearing capacity of the close-ended pile was higher than that of the open-ended pile. The horizontal load and pile top displacement curves had no relation to the conditions of pile tip and cross-section as the soil-pile response was at the linear elastic stage. The H-shaped pile showed the maximum horizontal bearing capacity,while the circular pile showed the minimun horizontal bearing capacity under the same conditions of pile material,pile-end condition and the embedment depth in soil. The centrifugal model tests indicated that the normalized p-y curve was in accordance with exponential function.

关 键 词：离心模型试验 刚性桩 水平荷载 水平反力系数 软土 

分 类 号：TU473.1[建筑科学—结构工程]