长江科学院院报2018，Vol.35Issue(4)：109-116,8.DOI:10.11988/ckyyb.20161260
小净距隧道群稳定性判定因素及施工顺序优化研究
Determinant Factors of Stability and Optimization of Construction Sequence in Tunnel Group with Small Clear Distance
摘要
Abstract
Maximum vault settlement,plastic zone volume,maximum shear rock stress and maximum axial force of bolt etc.,are determinant factors which reflect the stability of tunnel group with small clear distance.To investigate into the correlation degree among these factors,we obtained the values of these determinant indexes by using finite difference software together with modified Drucker-Prager model.Dunhua road station of Qingdao metro is taken as engineering background.In line with fuzzy grey relational theory,the order of determinant factors and the optimum scheme of construction sequence are analyzed.Results reveal that maximum axial force of bolt can be taken as the primary determinant factor of tunnel group stability;while maximum vault settlement and plastic zone volume could also reflect the tunnel group stability significantly;maximum shear rock stress has the smallest influence on tunnel group stability.In the present study,scheme 4 and scheme 5 are concluded as the optimum construction sequences,and both are verified by equivalent stress analysis.关键词
小净距隧道群/稳定性/判定因素/模糊灰色关联分析/方案优选Key words
tunnel group with small clear distance/stability/determinant factor/fuzzy grey relational analysis/optimization selection of schemes分类
交通工程引用本文复制引用
杜德持,王渭明,刘鹏,吕显州,张为社..小净距隧道群稳定性判定因素及施工顺序优化研究[J].长江科学院院报,2018,35(4):109-116,8.基金项目
国家自然科学基金项目(41472280) （41472280）
