摘要
文中通过大型直剪仪研究了黏性土与混凝土界面的界面摩擦阻力,测定了不同剪切速率和法向应力下黏性土-混凝土界面摩擦阻力以及剪切速率与剪切破坏位移的关系.结果表明:黏性土与混凝土界面的剪应力-剪切位移关系受剪切速率和法向应力的影响.剪切速率对界面附着力和界面摩擦角均不存在影响,界面剪切破坏位移与剪切速率之间没有明显的相关性,但剪切速率对桩-土界面剪切破坏位移有一定的影响.因此,静压桩沉桩速度范围内,剪切速率对桩土界面力学特性影响不大.
The interfacial friction resistance between cohesive soil and concrete was studied by large-scale direct shear apparatus,and the relationship between shear rate and shear failure displacement was measured under different shear rates and normal stress.The results show that the shear stress-shear displacement relationship at the interface between cohesive soil and concrete is influenced by shear rate and normal stress.Shear rate has no influence on interfacial adhesion and interfacial friction angle,and there is no obvious correlation between interfacial shear failure displacement and shear rate,but shear rate has some influence on pile-soil interfacial shear failure displacement.Therefore,the shear rate has little effect on the mechanical properties of pile-soil interface within the range of pile driving speed of static pressure pile.
作者
王永洪
王鑫
李世强
王军
张腾
张传通
李勇
WANG Yonghong;Wang Xin;LI Shiqiang;WANG Jun;ZHANG Teng;ZHANG Chuantong;LI Yong(School of Civil Engineering,Qingdao Technological University,Qingdao 266033,China;China State Construction Zhongxin Construction Engineering Co.Ltd.,Shandong Branch,Qingdao 266109,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2024年第1期137-140,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家重点研发计划(2021YFE0113400)
山东省自然科学基金面上项目(ZR2022ME143)。
关键词
桩土界面
剪切速率
力学特性
室内试验
pile-soil interface
shear rate
mechanical properties
indoor testing
