摘要
就软粘土地基中桩基础施工对周边土体物理力学参数的影响问题进行了分析,对施工扰动后周围土体的应力状态和结构的变化以及土体的变形进行了研究,结果表明,软粘土地基沉桩过程中桩土挤压应力及所引起的桩周土体超孔隙水压力效应是非常显著的。根据弹塑性理论分析结果,给出了沉桩施工的影响范围及大小。根据一些典型资料,对沉桩过程中随孔隙水压力增长、承载力的下降及沉桩过后桩基础承载力随时间增长的变化过程进行了理论分析,为桩基础承载力的正确估算提供了依据。
Some geo-environmental problems under pile foundation construction are studied.The physical and mechanical parameters of soft clay under construction disturbance are analyzed.The method for calculating squeezing stress and excess pore pressure by elastic-plastic theory is deduced.The variations of stress state and structure of soil are discussed.The deformation and stability of soft clay mass are also analyzed.Besides,the bearing capacity of pile under pile driving and its changes with time after construction are also discussed.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2003年第z1期2536-2540,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
地基基础工程
软粘土
沉桩
扰动
孔隙水压力
foundation engineering
soft clay
pile driving
disturbance
pore water pressure
