湖南工业大学学报2024，Vol.38Issue(3)：1-8,8.DOI:10.3969/j.issn.1673-9833.2024.03.001
破碎岩体隧道洞口开挖诱导滑坡与古滑坡耦合分析
Coupling Analysis of Induced and Ancient Landslides by the Excavation of Tunnel Portal in Cracked Rock Mass
摘要
Abstract
Taking the construction of the Dalishu Expressway tunnel entrance as the engineering background,an investigation has been made of the instability and reinforcement technology of the entrance working face slope with ancient landslide factors taken into consideration.By using borehole inclination data(BCD)and Midas GTS reduced strength finite element analysis model,the most dangerous sliding surface is speculated separately,with the results showing that the positions of the two sliding surfaces are found to be similar.By using unbalanced thrust transfer method,safety factor can be calculated based on BCD inference of the sliding surface.Based on the sliding surface of BCD and the finite element method,the sliding surface is approximately assumed to be a logarithmic spiral,considering terrain factors,with a multi-step slope upper limit analysis model established to study the impact of different reinforcement measures on slope stability.The results indicate that there is a similarity berween the slope safety factors calculated by the three methods.关键词
破碎岩体/隧道洞口/古滑坡/强度折减法/上限分析/不平衡推力传递法Key words
cracked rock mass/tunnel entrance/ancient landslide/strength reduction method/upper limit analysis/unbalanced thrust transfer method分类
交通工程引用本文复制引用
祝方才,周俊杰,赖国森,晏仁,刘海媚..破碎岩体隧道洞口开挖诱导滑坡与古滑坡耦合分析[J].湖南工业大学学报,2024,38(3):1-8,8.基金项目
湖南省自然科学株洲联合基金资助项目(2022JJ50087) （2022JJ50087）
