摘要
在弹性理论的基础上,假设桩-土之间有嵌入变形以模拟土的塑性,分析了水平荷载作用下桩基的荷载-变形特性。研究了模型参数的取值方法,同“m”法做了比较。算例分析表明,这个模型的计算结果同实测吻合得较好,并且可以考虑桩-土以及桩-桩相互作用,有利于分析群桩;直桩截面直径的增加,可以显著提高桩的水平承载力,但是当桩径达到一定值以后,桩径的提高对水平承载力的提高幅度并不显著;桩长的增加,不一定能够提高桩的水平承载力,存在一个临界桩长;地面土临界侧压力的提高,可以明显改善桩周土体的受力状态,减小桩的水平位移,提高水平承载力;“m”法假设地面侧压力为0,同黏土地基的工程实际不符。
Based on elastic theory and assumption that there is embedded deformation between pile and soil,the deformation and load of pile under lateral load are analyzed.The parameters of pile under lateral load are studied as compared with“m”method.The analysis of the case indicates that the result from the model agrees well with the actual measurement.Considering the pile-soil and pile-pile interactions of the model,it is favorable to analyze group piles.The pile with bigger diameter can bear larger lateral load.Along with the pile′s diameter increasing to specified value,the lateral bearing capacity of pile can′t be improved obviously.The longer pile can′t bear more lateral load.And there is a critical pile length.The improved critical side resistance can reduce the lateral displacement of pile head,and can improve the lateral bearing capacity of the pile.The “m ” method assumes the side resistance in the ground is zero,which does not agree with that in clay foundation.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2006年第z2期4177-4185,共9页
Chinese Journal of Rock Mechanics and Engineering
关键词
桩基工程
嵌入变形
水平荷载
理论分析
桩长
桩径
地基反力
pile foundation engineering
deformation of insertion
horizontal load
theoretical analysis
pile length
pile diameter
reaction of foundation
