摘要
基于非线性粘弹性理论,描述了土体的蠕变特性,并对某小桥桥台挡板开裂原因进行分析,同时对修建在软土中桩基与土、桥台及台背填土的相互作用进行了有限元计算,得出软土侧向挤出是挡板开裂原因的结论。对加铺地基梁的加固效果进行了计算,提出用改变工序来减少土体侧向挤出的方法,对用修建浅平基础代替桩基的工程效果进行有限元计算,论证了使用浅平基础的可行性。
A nonlinear viscoelastic model is introduced to describe the creep behaviors of soft soil. The model is used to analyze the damaged board of a bridge-pier. The finite element computation is used to make out the reason of the damaged board of a bridge-pier. The result of the computation shows that the lateral force caused by soft clay is the main reason of the damage of the board. The effect of the reinforcing measure was computed. A method to change the building step was advanced to solve the problem. The substitution of pile with shallow foundation was computed; and the feasibility of applying shallow foundations is also demonstrated.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2002年第6期742-746,共5页
Rock and Soil Mechanics
关键词
侧向变形
桥台
桩基
软土
蠕变
沉降
桥梁
软土地基
soft clay
creep
settlement of soft foundation
piled foundation for pier of bridge
