摘要
结合工程实例,对深厚粉砂持力层中预制桩基承载力参数的高应变动力测试取值与桩基规范给出的估计值进行了对比分析,指出规范方法未能充分考虑持力层地基的桩端阻及侧阻的相互影响,特别是桩侧阻的增强效应,并且对深厚粉砂层中桩侧阻增强效应的机理及其影响因素进行了阐述,进一步给出了典型工程案例进行论证分析,总结了在工程实际中可以考虑桩侧阻增强效应的条件,并提出相关建议供类似工程参考。
In this paper, combined with the practical engineering example, the high strain dynamic test value of bearing capacity parameters of the prefabricated pile foundation in thick silty sand bearing layers was compared with the estimated value of pile foundation specification. The article pointed out that the mutual influence between pile tip resistance and lateral resistance of bearing layer foundations,especially the enhancement effect of pile lateral resistance, were not fully considered in the standard method. The mechanism and influencing factors of pile lateral resistance enhancement in deep silty sand layer were expounded. Furthermore, a typical engineering case was given for demonstration and analysis. Then, the article summarized the conditions under which the pile lateral resistance enhancement effect could be considered in engineering practice and put forward some suggestions for similar engineering reference.
作者
王辉熠
朱帆
WANG Hui-yi;ZHU Fan(Jiangsu Energy Engineering Group Jiangsu Power Design Institute Co.Ltd.,Nanjing 211102,China)
出处
《工程建设与设计》
2019年第22期36-39,共4页
Construction & Design for Engineering
关键词
深厚粉砂持力层
预制桩基
承载力参数
桩侧阻增强效应
deep silty sand bearing layer
prefabricated pile
bearing capacity parameters
enhancement effect of pile lateral resistance
