摘要
针对怀邵衡铁路岩鹰鞍隧道F4破碎断层带施工围岩稳定性问题,通过查阅文献、理论计算分析和数值计算等方法,结合工程实际情况和现场测试,获取了断层带隧道围岩稳定性相关力学参数,运用FLAC3D进行数值模拟,探究合理的工法来控制对隧道周边围岩的扰动.结果表明,采用迂回导坑进行注浆帷幕预加固并合理有效地控制施工循环进尺可更好地控制断层带隧道围岩的变形以及应力应变关系,确保断层带隧道围岩的稳定性和施工的安全顺利进行,对后续类似工程提供参考借鉴.
Aimed at the stability of surrounding rock in the construction of F4 fractured fault zone of Yanying’an Tunnel on Huaihua-Shaoyang-Hengyang Railway, the relevant mechanical parameters of surrounding rock stability of tunnel in fault zone were obtained by consulting literature, theoretical analysis and numerical calculation. Combined with actual engineering situation and field test, the numerical simulation was carried out by FLAC3I), and the reasonable construction method was explored. The results showed that the deformation of the surrounding rock and the stress-strain relationship in fault zone could be better controlled in terms of pre-reinforcement of grouting curtain with detour guide pit, the construction cycle footage controlled reasonably and effectively, so as to ensure the stability of surrounding rock with safety and success in fault zone. It would provide reference for similar projects in further.
作者
高雷州
Gao Leizhou(China Railway 20th Bureau Group Co. Ltd., Xi'an Shaanxi 710016,China)
出处
《铁道建筑技术》
2019年第9期123-127,共5页
Railway Construction Technology
基金
湖南省科技计划项目经费资助(2017SK2393)
关键词
破碎断层带
注浆加固
开挖进尺
效果评价
稳定性分析
数值模拟
fractured fault zone
grouting reinforcement
construction cycle footage
effect evaluation
stability analysis
numerical simulation
