岩土工程学报2013，Vol.35Issue(6)：1076-1083,8.
超深开挖对抗拔桩承载力影响的离心机试验研究
Effects of deep excavation on uplift capacity of piles by centrifuge tests
摘要
Abstract
The stress state of the soil around piles and the bearing capacity of uplift piles will be changed by deep excavation.Through centrifuge tests,the effects of ultra-deep excavation on the bearing capacity of uplift piles are analyzed.Using the finite element numerical simulation analysis method which takes the effects of over consolidation into account,the centrifuge tests are calculated,and the mechanism of the effects of ultra-deep excavation on bearing characteristics of uplift piles is analyzed.The results show that under the influence of over consolidation of base soil,the coefficient of earth pressure,the pile-side ultimate friction resistance and the bearing capacity of uplift piles are larger than those under normal consolidation.If the effects of pit excavation on stress level of soil are not considered,it will be unsafe to take the bearing capacity as design value,ff the effects of pit excavation on stress level of the soil around piles are taken into account,while the capacity of over consolidation is not considered,the bearing capacity of uplift piles will be underestimated.关键词
抗拔桩/深开挖/极限承载力/超固结/离心机试验Key words
uplift pile/ deep excavation/ ultimate bearing capacity/, over consolidation/ centrifuge test分类
建筑与水利引用本文复制引用
胡琦,凌道盛,孔令刚,罗耀武,牛犇,陈峥..超深开挖对抗拔桩承载力影响的离心机试验研究[J].岩土工程学报,2013,35(6):1076-1083,8.基金项目
国家自然科学基金项目(51108417) （51108417）
浙江大学软弱土与环境土工教育部重点实验室开放基金项目(2011P01) （2011P01）
