土木与环境工程学报（中英文）2024，Vol.46Issue(3)：16-23,8.DOI:10.11835/j.issn.2096-6717.2023.021
温度影响下能量桩-土接触面剪切特性试验研究
Experimental study on shear behavior of energy pile-soil interface affected by temperature
摘要
Abstract
In the working process of energy pile,the pile body will produce thermal deformation influenced by temperature change and induce cyclic shear action on the soil around the pile,which would weaken the bearing capacity of the foundation and bring risks to the normal use of the pile foundation.Because the traditional direct shear apparatus could not simulate the temperature variation of the pile and soil in the working process of energy piles,there was limited research on the mechanical properties of the pile-soil interface affected by the temperature.In this paper,the traditional direct shear apparatus was modified to adjust the temperature of soil samples.The soil used in this test was sampled from a construction site in Chongqing,and the geotechnical direct shear tests of pile-soil interface under different temperatures were carried out.The effects of single and cyclic temperature variation on the mechanical properties of the pile-soil interface were analyzed.Meanwhile,the difference between the mechanical properties of pile-soil interface and soil was compared.The results showed that the shear strength of pile-soil interface was influenced significantly by the temperature.With the increase of temperature,the friction angle and cohesion of the pile-soil interface would firstly decrease and then increase.Temperature cycles had a great influence on the mechanical properties of pile-soil interface under low normal stress,while it had no significant influence under high normal stress.The variations of shear strength,friction angle and cohesion of the soil influenced by temperature was similar to those of pile-soil interface.关键词
能量桩/剪切特性/桩-土接触面/温度变化Key words
energy pile/shear behavior/pile-soil interface/temperature variation分类
建筑与水利引用本文复制引用
陈志雄,甘丰嘉,王成龙,彭宸,丁选明..温度影响下能量桩-土接触面剪切特性试验研究[J].土木与环境工程学报（中英文）,2024,46(3):16-23,8.基金项目
国家自然科学基金(51908087) （51908087）
中央高校基本业务费(2021CDJQY-042) National Natural Science Foundation of China(No.51908087) （2021CDJQY-042）
Fundamental Research Funds for the Central Universities(No.2021CDJQY-042) （No.2021CDJQY-042）
