摘要
本文采用有效应力有限元方法对饱和砂土地基中的地下管线振动台模型试验进行了数值模拟,该方法以广义Biot固结原理为基础,采用了双曲线的应力应变关系和Seed提出的孔压模型,通过将预测的超孔隙水压力、排水措施的抗上浮效果与试验结果进行比较,结果表明,有效应力分析方法可以较好地模拟管线周围地基中超孔隙水压力增长和消散过程、评价管线的抗上浮能力,采用排水措施可提高管线的抗上浮安全系数。
The effective stress FEM was used to simulate the shaking table model test on pipelines buried in saturated sand foundation.This method was based on the generalized Biot's equation.The hyperbolic relationship between stress and strain was used in the numerical model and pore pressure due to earthquake load was calculated from pore pressure model developed by Seed et al.The calculated excess pore water pressure response, behaviors of soil foundation and the effectiveness of different types of drainage measures were compared with the results of test.It shows that the effective stress FEM can be effectively used to simulated the process of build-up and dissipation of pore pressure in foundation around the pipelines and can be used to evaluate the capability of pipeline against uplifting.The safety of pipeline against uplifting can be improved by adopting drainage measures.
出处
《水利学报》
EI
CSCD
北大核心
2004年第12期112-119,共8页
Journal of Hydraulic Engineering
基金
国家自然科学基金资助项目(50278009)
关键词
地下管线
有效应力
排水措施
上浮
模型试验
pipeline
effective stress
drainage measures
uplifting
model test
