摘要
p-y曲线法在国内外的桩基设计中广泛使用,但对于黄河三角洲新近沉积粉土的p-y曲线尚缺乏研究。通过室内模型试验,根据桩身弯矩、桩身水平位移与桩周土抗力三者之间的关系,得出黄河三角洲饱和粉土地基单桩p-y曲线,并与美国石油学会API推荐的p-y曲线以及现有的两种粉土p-y曲线进行比较。对比发现:API推荐的p-y曲线有偏大的初始土抗力及偏小的极限土抗力,而现有的两种粉土p-y曲线有偏大的极限土抗力。最后给出了在黄河三角洲粉土地区桩基设计的建议。
The p-y curve method is widely used in the design of pile foundation at home and abroad , but few researches have been concerned about the newly deposited silt in the Yellow River delta .In order to study the mechanical features , tests of a model pile embedded in deposit of saturated silt were carried out under lateral loadings .The p-y curves at different depths were obtained on the basis of relationships among the moment of the pile shaft, the lateral displacement and the soil reaction force .The experimental p-y curves were compared with the p-y curves recommended by API and two existing silt p-y curves, respectively.The results indicated that the API recommended p-y curves was of relatively larger initial stiffness but smaller ultimate soil-pile interaction , while the two existing silt p-y curves was of relatively larger ultimate soil-pile interaction .Suggestions on the design of pile foundations in the Yellow River delta were proposed .
出处
《工业建筑》
CSCD
北大核心
2014年第7期79-83,共5页
Industrial Construction
基金
国家自然科学基金项目(41072216)
