CFG桩的承载力特性试验研究
摘要:通过CFG足尺桩的现场试验,测定了桩身轴力的分布以及桩侧摩阻力等参数,对复合地基沉降、桩身荷载的分担、桩身轴力的分布以及侧摩阻力进行了分析,揭示了CFG桩的受力特征。研究表明,按规范公式计算复合地基承载力特征值不大于现场载荷试验值,桩土应力比跟褥垫层材料的粒径、压缩模量成正比;CFG桩复合地基存在负摩阻力,与施工条件有较大关系。
Abstract:Through full-scale CFG pile field trials,axial force distribution and pile friction and other parameters are measured,the sustained force characteristics and load settlement of CFG pile are obtained,the pile load-sharing case,the pile shaft distribution and lateral friction force are analyzed,the force characteristics of CFG pile is reflected through the field of engineering model.Studies suggest that:Calculation of composite foundation bearing capacity according to the standard formula is not greater than the value of the field load test,pile-soil stress ratio is proportional to the diameter of the root of cushion material and compression modulus,the CFG pile has negative friction resistance,but there is a greater relationship with the construction conditions.
中文标题：
CFG桩的承载力特性试验研究
Reliability Analysis of High Level Backfill Based on Chaotic Optimization
作者：
周宸,化建新,王健
Zhou Chen,Hua Jianxin,Wang Jian
作者简介:周宸,男,1984年生,汉族,北京人,硕士研究生,高级工程师,从事岩土工程与地基基础研究。E-mail:jianhao1515@163.com
通讯地址：
中兵勘察设计研究院, 北京 100053
ChinaOrdnanceIndustrySurvey,Design&ResearchInstitute,Beijing100053,China
中图分类号:TU473.11
doi:10.3969/j.issn.1007-2993.2016.05.001
出版物：岩土工程技术
收稿日期:2016-05-06
关键词:CFG桩,承载力,侧摩阻力,桩土应力比
Key words:CFG pile,load,bearing capacity,side friction
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