摘要
宝峰隧道是中老铁路的控制性重难点工程,其区域地质构造作用异常强烈,地质条件极其复杂,涌水涌(流)砂、软岩大变形、掌子面失稳、地表沉降变形等成为制约隧道勘察设计和安全施工的重大难题。结合现场地质勘察、室内试验、物探等手段,查清了全风化粉细砂岩层的分布、主要工程地质问题及特征。针对宝峰隧道主要工程地质问题及特征,确定了合理的施工工艺,制定了主要工程地质问题防治对策。现场实施结果表明,对策有效可行。研究成果可为类似地质条件的隧道勘察、施工建设和支护结构设计提供参考。
Baofeng Tunnel is a crucial and challenging work for China-Laos Railway.The regional geological structure has an exceptionally strong effect,and the geological conditions are extremely complex.Issues such as water and sand inflow,significant deformation of soft rock,instability of working faces,and surface subsidence restrict tunnel investigation,design,and safe construction.By combining on-site geological surveys,laboratory experiments,and geophysics methods,the distribution,main engineering geological problems,and characteristics of completely weathered fine sandstone layers were determined.Based on the main engineering geological problems and characteristics of the Baofeng Tunnel,reasonable construction processes were determined,and countermeasures to address the main geological issues were developed.On-site implementation demonstrated that these countermeasures were effective and feasible.The results can provide a reference for tunnel investigation,construction,and support structure design under similar geological conditions.
作者
陈松
CHEN Song(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)
出处
《高速铁路技术》
2023年第4期84-88,共5页
High Speed Railway Technology
关键词
宝峰隧道
中老铁路
饱和状全风化粉细砂岩
对策研究
Baofeng Tunnel
China-Laos Railway
saturated completely weathered silty fine sandstone
countermeasure study
