中国工程科学2012，Vol.14Issue(1)：105-112,8.
DX桩桩周土应力场分布的模型试验研究
Model test study on surrounding soil stress distribution of DX pile
唐松涛 1陈立宏 1袁希雨1
作者信息
- 1. 北京交通大学土木建筑工程学院,北京100044
- 折叠
摘要
Abstract
Through small scale model test of DX piles in lab, the test results can provide necessary basis for computing formula of settlement. A series of tests about DX piles with 22 mm diameter in sand are carried out in a small test chamber with the loading frame; the Q - s curves are derived, and then the bearing capacities are determined and compared with the straight piles in the same condition. At the meantime, miniature earth pressure cells are installed to test the stress in the surrounding soil of DX piles, so that the load transfer law in the soil can be researched. The test results show that the capacity and settlement characteristics of DX pile are much superior to the straight pile with the same parameters. For the single-bell DX pile, the location of the bell has barely effect on the capacity. However, when the bell locates on the lower part of pile shaft, the stress of soil around the pile tip increases a lot. For two-bell DX pile, the stresses around the two bells are similar, and the range of soil stress induced by bells in vertical is around two times of bell diameter. For the DX pile with three bells, the soil stress around the bells spread increasingly, while the amplitude is small.关键词
DX桩/土压力盒/应力量测Key words
DX pile/ earth pressure cell/ stress measurement分类
建筑与水利引用本文复制引用
唐松涛,陈立宏,袁希雨..DX桩桩周土应力场分布的模型试验研究[J].中国工程科学,2012,14(1):105-112,8.
