湖南大学学报（自然科学版）2017，Vol.44Issue(9)：128-136,9.DOI:10.16339/j.cnki.hdxbzkb.2017.09.016
纵向倾斜地表盾构隧道掌子面三维挤出破坏分析
Analysis on Three-dimensional Extrusion Failure of Shield Tunnel Face with Longitudinal Declined Ground
摘要
Abstract
In order to improve the stability evaluation system of tunnel face,considering the effects of declined ground and tunneling footage,the upper bound expression of supporting force for three-dimensional shallow tunnel face was derived and the optimal upper bound solution of supporting force was obtained by further using the planning procedure.The results show that the ratio of supporting force of tunnel face to soil cohesion is linearly affected by the dimensionless parameter γD/c (γ is soil bulk density,D is tunnel section diameter,c is soil cohesion),ratio of tunnel footage to tunnel depth,and ratio of ground overload to soil cohesion,whereas it is nonlinearly affected by the ratio of tunnel depth to tunnel section diameter,inclined ground surface angle,and internal friction angle.The internal friction angle,inclined ground surface angle,ratio of tunnel depth to tunnel section diameter,and ratio of tunneling footage to tunnel depth have a significant effect on the passive failure mode,while the dimensionless parameter γD/c and ratio of ground overload to soil cohesion have less effect on it.关键词
浅埋隧道掌子面/破坏分析/极限分析上限法/纵向倾斜地表/掘进深度Key words
shallow tunnel face/failure analysis/upper bound limit analysis method/longitudinal inclined ground surface/tunneling footage分类
建筑与水利引用本文复制引用
贺志军,陈运鹏,李得建,赵炼恒..纵向倾斜地表盾构隧道掌子面三维挤出破坏分析[J].湖南大学学报（自然科学版）,2017,44(9):128-136,9.基金项目
国家自然科学基金资助项目(51478477),National Natural Science Foundation of China(51478477) （51478477）
贵州省交通运输厅科技项目(2014122006),Guizhou Provincial Department of Transportation Foundation(2014122006) （2014122006）
