成都理工大学学报（自然科学版）2016，Vol.43Issue(6)：751-756,6.DOI:10.3969/j.issn.1671-9727.2016.06.13
千枚岩隧道破碎带 TSP 超前预报解译标志
Study of seismic wave reflection characteristics of unfavorable geological bodies in phyllite tunnel
摘要
Abstract
Collapse and other geological disasters often occur in the process of tunnel construction in soft rock like phyllite.Accurate prediction of geologic bodies in front of tunnel face is particularly important.Taking the typical phyllite tunnel,the Zegu mountain tunnel in Wenchuan-Maerkang Highway of Sichuan as example,on the basis of seismic wave propagation theory,combined with engineering geological analysis and forward modeling,the reflectivity and interpretation signs of seismic waves under different water conditions for phyllite fracture zone in the TSP prediction are discussed.It shows that reflection phenomenon is obvious when longitudinal wave and transverse wave meet fracture zone and transverse wave reflection phenomenon is more intense than the longitudinal wave.When fracture zone is rich in water,phyllite becomes softer and transverse wave reflection intensified.Analysis of the perspective of depth migration reveals that normal reflection and negative reflection shift frequently and the extensibility of single reflecting layer are poor.The result of this research improves the accuracy of TSP prediction in the construction of soft rock tunnel.关键词
千枚岩/TSP/破碎带/正演模拟/解译标志Key words
phyllite/TSP/structural crushing zone/forward modelling/interpretation signs分类
交通工程引用本文复制引用
贾金晓,李天斌,孟陆波,刘阳飞,曹海洋..千枚岩隧道破碎带 TSP 超前预报解译标志[J].成都理工大学学报（自然科学版）,2016,43(6):751-756,6.基金项目
国家自然科学基金项目（41102189）；地质灾害防治与地质环境保护国家重点实验室团队重点项目（SKLGP2009Z002）；成都理工大学优秀创新团队培育计划项目（HY0084）。 （）
