湖南大学学报（自然科学版）2016，Vol.43Issue(11)：13-19,7.
黏性土中倾斜荷载下抗拔桩的模型试验研究∗
Study of Model Experiments on Uplift Piles in Clay under Oblique Loads
摘要
Abstract
Laboratory model tests on steel piles embedded in cohesive soil were carried out to study the transformation law in relation to ultimate uplift capacity and displacement patterns of uplift piles subj ected to oblique loads.The test results show that the side of the pile near the oblique load is always under pres-sure,while the other side is in tension all the time,which differs from the uplift pile subj ected to vertical loads.After reaching the ultimate capacity,soil in some depth is cracked only around the side close to ob-lique load.The failure surface occurs below the top of the pile.The failure area on the earth surface is dis-tributed as a fan,whose range becomes larger with the increasing inclination of loads.Meanwhile,the ul-timate capacity of piles increases with the increase of the inclination angle.On this basis,the calculation model of uplift piles subj ected to oblique loads and the formula of failure surface around the pile were es-tablished based on the failure mode.Moreover,according to the analysis on the equilibrium conditions of the soil element,a formula for estimating the oblique capacity of uplift piles in clay soil subj ected to ob-lique loads was also proposed.The predictions agree well with the test results so that the formula can be used in practical engineering.关键词
黏性土/倾斜荷载/抗拔桩/模型试验/极限承载力Key words
clay/oblique loads/uplift piles/laboratory tests/ultimate capacity分类
建筑与水利引用本文复制引用
杨明辉,杨学文,赵明华..黏性土中倾斜荷载下抗拔桩的模型试验研究∗[J].湖南大学学报（自然科学版）,2016,43(11):13-19,7.基金项目
国家自然科学基金资助项目(51278184,50708030),National Natural Science Foundation of China(51278184,50708030) （51278184,50708030）
教育部新世纪优秀人才支持计划(NCET-13-194) （NCET-13-194）
湖南省科技重点研发项目(2015CK3003) （2015CK3003）
