摘要
根据波速孔压静力触探探头和静压桩在软黏土中贯入的特点,建立以波速孔压静力触探试验参数计算软土中静压桩的单桩桩侧承载力时效性的理论解,利用该解可以预测饱和软土中沉桩结束后桩侧承载力随时间的变化。与传统桩的承载力时效性简化分析方法不同,该理论解不仅考虑多土层地基中不同土的刚度指数的差异对固结过程的影响,还考虑因各土层固结系数不同而导致消散速率不同的影响。现场不同间歇期的单桩载荷试验测试结果验证该理论解的合理性。
According to the characteristics of installation about the seismic piezocone penetration tests（SCPTU） penetrometer and the pile,a theoretical relationship between time-effect of shaft bearing capacity of single pile and the data measured from SCPTU is developed,which can be used to predict the variation of shaft bearing capacity of a jacked-in pile with time in saturated soft clay.Different from the traditional way,the effect of different stiffness index and consolidation coefficient on the consolidation process in varied clays and highly stratified deposits are considered in the new theoretical solution.Besides,the ration of the solution is verified by the single pile loading tests in different time period after installation.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2011年第7期1482-1487,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(50878075)
关键词
桩基工程
波速孔压静力触探试验
静压桩
饱和软黏土
单桩桩侧承载力时效性
pile foundations
seismic piezocone penetration tests（SCPTU）
jacked-in pile
saturated soft clay
time-effect of shaft bearing capacity of single pile
