期刊论文

Comparative study on the vertical load-bearing capacity of the drilling with pre-stressed concrete pipe cased pile based on in-situ and physical simulation tests

中文

岩土力学

1000-7598

2021

42

02

419-429

10.16285/j.rsm.2020.0845

No.2019A1515110836:应用基础研究项目 Z019018:岩土力学与工程国家重点实验室资助课题 No.51678171:国家自然科学基金 No.51908225:国家自然科学基金 No.2019M662918:中国博士后科学基金 No.2019M652899:中国博士后科学基金 No.2020M672584:中国博士后科学基金

本校为第一机构

随钻跟管桩（简称DPC桩）是一种钻孔-沉桩-排土同步进行的无泥浆排放的节能环保型大直径（800～1 400 mm）新型非挤土PHC管桩。开展了现场原位试验、理论计算分析及物理模拟试验,对比分析了这种新桩型的承载性能优势、桩侧摩阻力分布特征、荷载传递特性。得到如下结论:（1）原位静载试验中,DPC桩是一种以发挥桩侧摩阻力为主的摩擦端承桩,桩侧摩阻力占比高达67.84%～72.85%,DPC桩的承载性能与注浆效果密切相关,相对于同等条件下的钻孔灌注桩、锤击法管桩,其竖向承载力分别提高了33.42%、23.16%,DPC桩的桩底沉渣厚度较小时,其荷载-位移曲线为缓变形（1号桩）,否则为陡降形（2号桩）;（2）室内物理...

The drilling with pre-stressed concrete pipe cased pile (referred to as DPC pile) is a new type of large-diameter (800-1 400 mm) non soil-squeezing PHC pipe pile with drilling hole, sinking pile and discharging soil occurring simultaneously. DPC pile is energy-saving and environmental-friendly. In this paper, in-situ tests, theoretical calculation analysis and physical simulation tests are carried out to compare and analyze the better vertical load-bearing capacity of this new type of pile, the skin friction distribution characteristics and the...