摘要
在水工隧洞建设中,混凝土衬砌裂缝和顶拱厚度不足是经常发生且十分典型的工程质量问题。具有这种质量缺陷的衬砌在不利工况下其结构性态如何,是广大技术人员十分关心的问题。该文在白山嘴输水隧洞实际衬砌结构缺陷现场检测的基础上,分析了缺陷模式和尺寸,提炼出缺陷特征,并采用FLAC程序进行了计算分析。计算结果表明,该缺陷对衬砌的安全稳定性有明显影响,但在进行缺陷修补加固、恢复衬砌整体力学特性以后,混凝土衬砌的性能将能够满足设计要求。
In the construction of hydraulic tunnel, the engineering quality problem is often caused by concrete cracks and insufficient thickness of roof lining. This problem attracted great attention of the most engineers that whether the structure performance of this kind of lining can meet the design criteria or not, especially under unfavorable conditions. Based on the on-site inspections of the lining defects in Baishanzui tunnels, the model and size of the defects are analyzed with FLAC program. The study shows that the defects have obvious adverse influence on the stability and safety of the tunnel lining, however, if a backfilling grouting is carried out and the cracks are repaired, the integrality of lining is restored, the behavior of lining will be improved and can meet the design criteria as well.
出处
《土木建筑与环境工程》
CSCD
北大核心
2009年第2期74-79,共6页
Journal of Civil,Architectural & Environment Engineering
基金
国家自然科学基金项目(50679045)
江苏省自然科学基金项目(BK2008085)
关键词
隧洞
衬砌
裂缝
厚度
tunnel
lining
crack
thickness
作者简介
汤雷（1972-），男，南京水利科学研究院教授级高工，博士，主要从事水工结构研究，（E—mail）leitang@nhri．cn。
