摘要
针对厦门翔安隧道风化深槽的工程特征,对于不同开挖及支护方法进行了FLAC模拟;通过对比分析提出合理的开挖及支护方法;对全断面帷幕注浆及双侧壁导坑法开挖施工工艺作了介绍.分析结果表明,双侧壁导坑法使拱部、侧墙、底板的变形明显减小,整个隧道的受力也更加合理,没有产生集中应力较大区域.建议选择双侧壁导坑法开挖;采用全断面帷幕注浆进行预加固;双侧壁导坑法开挖过程中,应配合小导管注浆等其他辅助加固措施.
Based on the general situation and geology condition of the Xiamen Xiang＇ an sub-sea tunnel, the construction effects on different methods of excavation and pre-supporting were simulated by FLAC. The rational method of excavation and pre-supporting was proposed through analysis and comparison of the computed results. The construction technology of double-side pilot heading excavation method and full-section curtain grouting was introduced. The simulated results of the double-side pilot heading excavation method show that the deflections of arch crown, side walls, and bottom plate will be reduced obviously; the tunnel section will be forced in much more rational distribution; and there will not be large areas of stress concentration. The suggestions include; 1） to select the double-side pilot heading excavation method, 2） to adopt full-face curtain grouting for advanced consolidation, 3） and to apply grouting by small diameter steel tubes and other supplementary reinforced measures during the excavation.
出处
《北京工业大学学报》
EI
CAS
CSCD
北大核心
2008年第2期155-158,共4页
Journal of Beijing University of Technology
基金
国家自然科学基金(50678002)
北京市科技计划课题资助项目(Y060506000007022)
关键词
海底隧道
风化深槽
施工效应
FLAC
sub-sea tunnel
deep weathered rock trough
construction effect
FLAC
