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。
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.
作者
周宸
化建新
王健
Zhou Chen Hua Jianxin Wang Jian(China Ordnance Industry Survey, Design ＆ Research Institute, Beijing 100053, China)
出处
《岩土工程技术》
2016年第5期217-222,248,共7页
Geotechnical Engineering Technique
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：jianha01515@163．com
