黄土场地桩基负摩阻力的研究进展  

Research Progress of Pile Foundation Negative Friction Resistance of the Loess Site

作　　者：董芸秀 杨永东[1,2] 李平 张振宁[1,2] DONG Yun-xiu;YANG Yong-dong;LI Ping;ZHANG Zhen-ning(Key Laboratory of Engineering Geological Property and Engineering Application of Loess in Gansu,Longdong University,Qingyang 745000,Gansu;College of Civil Engineering,Longdong University,QingYang 745000,Gansu)

机构地区：[1]陇东学院黄土工程性质及工程应用省级重点实验室,甘肃庆阳745000 [2]陇东学院土木工程学院,甘肃庆阳745000

出　　处：《陇东学院学报》2019年第2期50-54,共5页Journal of Longdong University

基　　金：2016年陇东学院青年科技创新项目(XYZK1602)

摘　　要：桩基负摩阻力是指桩周土由于自重固结、湿陷、地面荷载作用等原因而产生大于桩的沉降所引起的对桩表面的向下摩阻力。桩基因负摩阻力而受损的事故多发,严重影响上部结构的正常使用。因此,深入开展桩基负摩阻力的研究对于我国西北黄土地区的工程建设意义重大。系统评述了近年来桩基负摩阻力在理论计算、模型试验和现场试验等方面的研究现状,重点讨论了不同桩基负摩阻力消减措施的特点和负摩阻力纠偏技术存在的问题,并对今后黄土场地桩基负摩阻力研究重点和发展方向提出了展望。The negative friction resistance of the pile foundation refers to the downward friction resistance to the surface of the pile caused by the settlement of the pile due to the self-weight consolidation, collapsibility, ground load and other reasons. Piles are damaged due to negative friction, which seriously affects the normal use of the superstructure. Therefore, it is of great significance to study deeply the negative friction resistance of pile foundation for the construction of the loess area in northwest China. This paper systematically reviews the research status of negative friction resistance of pile foundations in theoretical calculations, model tests and field tests in recent years. The advantages and disadvantages of the treatment measures for negative friction resistance and the correction technology using negative friction resistance are discussed. The research focus and development direction of the field are forecasted.

关 键 词：湿陷性黄土 桩侧负摩阻力 桩基 研究进展 

分 类 号：TU473[建筑科学—结构工程]