岩土力学2012，Vol.33Issue(8)：2403-2407,5.
基于自平衡试桩法大直径嵌岩桩尺寸效应分析
Analysis of size effect on large diameter rock-socketed pile based on self-balance method
摘要
Abstract
Based on the self-balanced test technology, the size effect on the large diameter rock-socketed pile has been analyzed by using in-situ testing methods, including the change of diameter, the depth socketed in rock and size effect on tip resistance of pile and so on. From the result of test, it can be seen that it exit a certain phenomenon of the size effect on the large diameter rock-socketed pile. With the increasing of pile diameter, the side resistance is decreased while other conditions are invariable. From the socketed depth point of view, the side resistance of pile is not the same in the case of the same rock areas because of the difference of its socketed depth. The greater the depth embedded in rock, the smaller the side resistance of pile. The experimental results show that the character of the rock around the pile has the greatest impact on the pile side resistance. The higher the compressive strength of rock, the side resistance of pile is also greater. In addition, the effect of diameter change on the pile tip resistance is even more apparent. Therefore, the design of large diameter pile should pay attention to the size effect on the bearing capacity in rock areas.关键词
嵌岩桩/尺寸效应/桩侧阻力/桩端阻力Key words
rock-socketed pile/ size effect/ shaft resistance/ tip resistance分类
建筑与水利引用本文复制引用
龚成中,何春林,龚维明,戴国亮..基于自平衡试桩法大直径嵌岩桩尺寸效应分析[J].岩土力学,2012,33(8):2403-2407,5.基金项目
江苏省自然科学基金项目(No.BK2011406) （No.BK2011406）
山东省交通厅科技项目(No.2010Y-3). （No.2010Y-3）
