岩土工程学报2011，Vol.33Issue(3)：427-432,6.
基坑开挖对抗拔桩极限承载力影响的模型试验研究
Model tests on ultimate uplift capacity of piles under excavation
摘要
Abstract
In order to realize the ultimate uplift capacity of model piles under excavation in sand, 19 groups of model tests are conducted on different excavation diameters, depths, and different pile lengths under the bottom of pit.The results are obtained as follows: under the same excavation depth, the larger the excavation diameter is, the lower the ultimate uplift capacity of piles is.When the excavation diameter is 30 cm(10d), the ultimate uplift capacity of piles decreases sharply.When the excavation diameter continues to increase, the decrease of the ultimate uplift capacity of pile is small, then the ultimate uplift capacity of pile tends to have a stable value.Under the same excavation depth, the shorter the pile under the bottom of pit is, the larger the loss of the ultimate uplift capacity is.The soil is overconsolidated after excavation, and the ultimate uplift capacity of piles is larger than that of the piles in the normal consolidation soil.Under the same excavation depth, the shorter the pile under the bottom of pit is, the larger the increased proportion of the ultimate uplift capacity of pile to that of the pile in the normal consolidation soil is.When the length of the pile under the bottom of the pit is the same, the deeper the excavation is, the larger the ultimate uplift capacity of pile is.关键词
基坑开挖/抗拔桩/极限承载力/模型试验分类
建筑与水利引用本文复制引用
罗耀武,胡琦,陈云敏,凌道盛..基坑开挖对抗拔桩极限承载力影响的模型试验研究[J].岩土工程学报,2011,33(3):427-432,6.基金项目
中国博士后科学基金项目(20080441232) （20080441232）
