桩土共同作用下的桩基开裂特性分析  

An Analysis of the Split Behavior of the Pile Foundation under the Action of the Pile and Soil

作　　者：蒋伯杰[1] 戴跃华[2] 柳杨[2] 

机构地区：[1]广东水利电力职业技术学院,广州510635 [2]广东省水利电力勘测设计研究院,广州510635

出　　处：《中国农村水利水电》2009年第7期80-82,85,共4页China Rural Water and Hydropower

摘　　要：以某输电线路跨越塔桩基计算为例,针对桩土接触问题的高度非线性,通过引入三维接触单元来模拟桩与桩侧土体之间的非线性"滑移破坏",采用弹塑性有限元的方法计算了桩土共同作用下的桩基位移及应力,确定了桩侧土体可能产生缝隙的宽度和深度,并在此基础上复核土体的渗流特性。计算结果表明:在各种不利荷载组合作用下,跨越塔桩基与土层的缝隙开展宽度及深度均非常有限,桩体所受的拉、压应力均较小,桩基建设对渗流场整体分布特征的影响极为微弱。The calculation of pile foundation, which is the outlet power tower, is taken as an example in this paper. Considering the nonlinear of the contact between the pile and the soil, the contact element is introduced to simulate the slippage breakage. To compute the displacement and stress of the pile foundation, which is under the action of the pile and soil, the contact element is adopted, and the method of elastic and plastic finite element is used. The extent and depth of the gap around the pile foundation is confirmed. In addition, the seepage behavior is checked on this basis. The result shows that under various loads, the extent and depth of the gap around the pile foundation is limited, the stress is also small. The seepage field is influenced the least by the pile building.

关 键 词：桩基 接触 开裂 位移 应力 

分 类 号：TU473.1[建筑科学—结构工程]