冰水堆积体隧道掌子面稳定性及合理注浆加固参数研究
Study on Tunnel Face Stability and Reasonable Grouting Reinforce Parameters in Ice Water Accumulation
高军 1杨佳运 2李鹏飞 2关喜彬3
作者信息
- 1. 中国公路工程咨询集团有限公司,北京 100089
- 2. 北京工业大学城市与工程安全减灾省部共建教育部重点实验室,北京 100124
- 3. 中铁十九局第六工程有限公司,江苏无锡 214000
- 折叠
摘要
以西藏自治区林芝市米林隧道穿越冰水堆积体段为背景,建立考虑渗流和不考虑渗流两种情况下的数值模型,对比分析了不同注浆加固参数的隧道掌子面相对挤出变形与强度折减系数的关系.分析结果表明:在考虑渗流和不考虑渗流两种情况下,不同注浆加固参数与安全系数的曲线趋势一致,开挖面安全系数均随注浆厚度、注浆纵向长度和等效黏聚力的增加而增大,并逐渐趋于稳定,渗透系数对开挖面安全系数影响不大,但考虑渗流情况下的开挖面安全系数远小于不考虑渗流情况.
Abstract
Based on the ice water accumulation section of Milin tunnel in Linzhi City,Xizang Autonomous Region,the numerical models and without considering seepage are established to compare the relationship between relative extrusion deformation and strength reduction coefficient of tunnel face with different grouting reinforce parameters.The results show that under the above two conditions,the curve trend of different grouting parameters and tunnel safety factor is consistent.The tunnel safety factor increases with the increase of grouting thickness,transverse length of grouting and equivalent cohesive force and gradually tends to be stable.The permeability coefficient has little effect on the tunnel safety factor.However,the safety factor of tunnel face considering seepage is much less than that without considering seepage.
关键词
冰水堆积体隧道/掌子面稳定性/合理注浆加固参数/渗流条件Key words
ice water accumulation tunnel/stability of tunnel face/reasonable grouting reinforce parameters/seepage condition引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据