摘要
桩基的负摩擦是地基对于桩产生相对沉降时施加在桩身的向下的摩擦力。工程中的负摩擦问题在许多场合中存在,如软基上建设高桩码头等大规模桩基结构或者高速公路通过江河时建造的高架桥的深桩基。负摩擦问题可能会因为设计使用时被忽视或考虑不足而造成:①桩端地基的屈服或破坏;②桩身破坏;③结构的不均匀沉降等而影响使用,甚至导致工程事故的发生。结合瑞安城市防洪工程实际工程地质条件,建立了基桩三维模型,计算了群桩的负摩擦力大小与分布,为工程设计提供了参考。
The negative friction on piles is the force which generated by piles and basement when they begin relatively subside. The problem of negative friction is familiar in civil engineering. For instanee, it may exist in massive piles foundation of docks which are based on weakly grounds or exist in the deeply piles foundation of viaducts, which are constructed while the highway traverse river. Some kickbacks may be engendered if the problem of negative friction is ignored or not considered plenty when the designers designing. For example, (1)the foundation in the end of pile will be submitted or destroyed; (2)the body of pile will be destroyed; (3)unequally sedimentation. These kickbacks had effect on the use of piles foundation, and could lead accident of engineer even. In the article, 3D model of a bridge's piles foundation is constituted combine with the geology of the Urban flood control Engineering in rui'an, the magnitude and distributing of negative friction on piles are calculated so that could offer reference for the engineering designing.
出处
《浙江水利科技》
2009年第4期26-29,共4页
Zhejiang Hydrotechnics
关键词
城市防洪
桩
负摩擦
有限单元法
urban flood control
piles
negative friction
FEM