摘要
位于饱和软粘土地基中的挤土桩,由于沉桩过程中地基土产生挤土效应及超静孔隙水压力,同时随着超静孔隙水压力的消散,桩周地基土产生再固结沉降。在研究沉桩过程中超静孔隙水压力的形成及消散规律的基础上,研究了桩周地基土再固结沉降的变化规律;从桩土相互作用的原理出发,研究了在桩周地基土再固结沉降的作用下,工程桩基沉降的计算方法。研究表明:由于桩周地基土的再固结沉降作用,工程桩基产生较大的沉降量,其值远大于垂直荷载作用下的桩基沉降;由于桩周地基土的再固结,桩基沉降随着时间的推移而增长。
Because of soil squeezing effect and excess pore water pressur,reconsolidation settlement will occur around soil compaction piles in saturated soft clay during pile driving. The issue of reconsolidation settlement is analyzed in this paper with respect to the excess pore water pressure formation and dispersing scatter discipline. In addition,calculation methods of pile settlement due to soil reconsolidation settlement is studied by using the interaction effect principle. The research indicates that the pile settlement due to soil reconsolidation settlement is far more than that due to vertical load,and this kind of settlement will go up with time. Therefore,the time-dependency of pile settlement is theoretically studied.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第19期3365-3369,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
土力学
挤土效应
超静孔隙水压力
再固结沉降
桩基沉降时效性
soil mechanics,soil squeezing effect,exess pore water pressure,reconsolidation settlement,time-dependency of pile settlement
