预应力锚索结构耐久性研究综述  

Research Review on the Durability of Prestressed Anchor Cable Structure

作　　者：李富民[1] LI Fumin(Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学江苏省土木工程环境灾变与结构可靠性重点实验室,江苏徐州221116

出　　处：《徐州工程学院学报（自然科学版）》2018年第2期18-24,共7页Journal of Xuzhou Institute of Technology(Natural Sciences Edition)

基　　金：国家自然科学金项目(51178454)

摘　　要：针对腐蚀影响锚索体系结构可靠性的这一问题,从锚头体系腐蚀行为、索体腐蚀行为及受拉性能退化、腐蚀锚索结构锚固性能演化等方面对其进行较为系统的介绍;认为与一般地面结构不同,锚索结构的腐蚀环境为地下岩土介质,其氧气供应往往不足,但水的供应又很充分;指出锚索结构受到腐蚀后,其膨胀变形将受到围岩的显著约束,其锚固受力状态及破坏形态存在特殊性.国内外针对锚索结构的耐久性问题虽展开了一定的探讨,但总体工作仍然相对较少,而该文为锚索结构耐久性方面更深入的研究提供了参考.In view of the corrosion affecting the reliability of the anchor cable system structure,this article systematically introduces the corrosion behavior of the anchor head system,the corrosion behavior of the cable body and the degradation of its tensile performance,and the evolution of the anchorage performance of the corroded anchor cable structure.It is considered that unlike the general ground structure,the corrosion environment of the anchor cable structure is underground geotechnical medium with insufficient oxygen but abundant water so that the expansive deformation of corrosion will be dramatically restricted by the surrounding rock,which leads to the particular destructive anchoring stress state.Although there is a certain discussion on the durability of the anchor cable structure at home and abroad,the overall work is still relatively deficient.Thus this article provides some references for the deeper research in the durability of anchor cable structures.

关 键 词：预应力锚索 耐久性 氯盐环境 硫酸盐环境 

分 类 号：TU476[建筑科学—结构工程]