粗糙度对黏性土-混凝土界面剪切特性影响  

EFFECTS OF THE ROUGHNESS ON SHEAR BEHAVIOR OF CLAY/CONCRETE INTERFACE

作　　者：王波 张腾 林振华 梁国伟 冯宏斌 周立飞 WANG Bo;ZHANG Teng;LIN Zhenhua;LIANG Guowei;FENG Hongbin;ZHOU Lifei(China Railway Construction Investment Group Co.Ltd.,Beijing 100855.China;School of Civil Engineering.Qingdao University of Technology,Shandong Qinglao,266033,China;Building and Intalling Engineer Co.,Ld.of China Railway 12th Bureau Group,Taiyuan 030024,China)

机构地区：[1]中国铁建投资集团有限公司,北京100855 [2]青岛理工大学土木工程学院,山东青岛266033 [3]中铁十二局集团建筑安装工程有限公司,太原030024

出　　处：《低温建筑技术》2022年第6期62-65,共4页Low Temperature Architecture Technology

基　　金：国家重点研发计划项目(2021YFE0113400)

摘　　要：为了研究粗糙度对粉质黏土-混凝土界面抗剪强度特性的影响,采用自制的大型直剪试验系统对不同粗糙度条件下粉质黏土-混凝土界面的剪切特性开展试验研究。研究结果表明,破坏临界位移与界面有效法向应力的线性相关性较强;不同法向应力下界面极限摩阻力受粗糙度的影响有所区别,粗糙度由2mm增加至4mm时,界面极限摩阻力变化最明显。粗糙度对粉质黏土-混凝土界面的抗剪强度特性有显著的影响,试验结果可为静压桩的工程实践提供借鉴与参考。Based on a large scale direct shear testing system, the shear characteristics of silty clay/concrete interface were investigated under different roughness, and the effects of different conditions on the shear strength of silty clay/concrete interface were studied. The results show that the ultimate frictional resistance and sliding frictional resistance of the interface increased gradually with the augment of roughness, then they tended to become stable, and the optimum roughness is about 4.0 mm. The roughness has significant effects on the shear strength of silty clay/concrete interface. The test results may provide reference for the engineering practice of jacked piles.

关 键 词：粉质黏土-混凝土 粗糙度 桩土界面 抗剪强度特性 

分 类 号：TU473[建筑科学—结构工程]