岩土工程学报Issue(1)：177-182,6.DOI:10.11779/CJGE201501022
桥梁吸力式沉箱基础承载特性试验研究
Model tests on bearing performance of suction caisson foundation for bridges
摘要
Abstract
Thesuction caisson foundation is an alternative foundation for cross-sea bridges. Based on the loading characteristics of the foundation of cross-sea bridges, a series of model tests are carried out to investigate the bearing performance of the suction caisson foundation. Different loading directions are considered in the model tests. The test results show that the vertical bearing capacity of the suction caisson foundation and the contribution of sidewall friction resistance increase with the increasing length of suction, and the tip resistance of caisson can be neglected. The lateral bearing capacity of the suction caisson foundation also increases with the increasing length of suction, but it is small and no more than 5 percent of the vertical bearing capacity. The lateral bearing capacity of the suction caisson foundation can be improved significantly by pre-applied vertical loading, and the bigger the pre-applied vertical loading, the greater the lateral bearing capacity. The factor should be considered in dealing with the large vertical loading in bridge engineering.关键词
吸力式沉箱基础/桥梁/承载力/砂土/模型试验Key words
suction caisson foundation/bridge/bearing capacity/sand/model test分类
建筑与水利引用本文复制引用
张永涛,杨炎华,黎冰,龚维明..桥梁吸力式沉箱基础承载特性试验研究[J].岩土工程学报,2015,(1):177-182,6.基金项目
国家自然科学基金项目(50909020) （50909020）
