摘要
针对桩身位于粉质粘土中而桩端支撑在圆砾层上的预制管桩,进行室内模型试验,研究桩端圆砾层的厚度变化对预制管桩承载力的影响及模型桩荷载作用下的侧摩阻力分布.试验结果表明:圆砾层厚度越大,桩的承载力越大;圆砾层厚度越大,桩侧摩阻力的增幅越大;圆砾层的厚度越大,预制管桩破坏时的总沉降量越小,破坏反应较厚度小者更强烈,桩侧摩阻力随桩土相对位移的增大出现极限值.
A laboratory model test is conducted to reveal the thickness variation of round gravel layer, at the bottom of a pile. The influence of the gravec layer thickness change on the model pile load bearing capacity and the action of pile skin friction distribution under the bearing are otudied. The test results show that the bigger the round gravel layer thickness is, the greater the bearing capacity of the pile and the skin friction are ;the bigger the round gravel layer thickness, the less the pile settlement is and the more in- tense the reaction of destroy is. The skin friction resistance shows limit value along with the increase of pile-soil relative displacement.
作者
胡锡鹏
邓修甫
杨珍帧
HU Xi-peng DENG Xiu-fu YANG Zhen-zhen(School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China)
出处
《湖南工程学院学报（自然科学版）》
2017年第1期91-94,共4页
Journal of Hunan Institute of Engineering(Natural Science Edition)
