摘要
为研究爆破荷载作用下隧道裂隙围岩的塌方规律,以连云港北固山隧道为工程背景,借助UEDC离散元数值模拟软件,模拟隧道钻爆法施工时裂隙围岩塌方运动全过程,揭示塌方过程中位移、速度、加速度等的变化规律,并深入探究不同节理分布时隧道塌方运动和破坏形态演变过程,为类似隧道工程建设提供借鉴。结果表明:爆破荷载作用下隧道裂隙围岩位移先小幅上升后下降;不同倾角节理分布时隧道塌方运动主要是形变和滑移;45°节理与另一不同倾角的节理组合时,隧道塌方运动主要表现为形变、开裂和塌落。
To study the collapse law of tunnel surrounded with fracture rock under blasting load,this paper simulates the collapse process of fracture surrounding rock while the tunnel suffers blasting excavation by virtue of discrete element method software UDEC relying on Beigu Mountain Tunnel engineering in Lianyungang.This research reveals the changing rule of factors including displacement,velocity and acceleration while the crack surrounding rock falling down.Furthermore,it explores collapse and failure pattern of fracture surrounding rock with different joints.In this way,this research can provide reference for similar tunnel construction.The results illustrate that:The fracture surrounding rock rises a little and then falls when it is exposed to explosion.The landslide motion is mainly divided into deformation and slip as the joint inclination varies.When the 45-inclinationangle joint combines with another different inclination-angle joint,the rock mass reflection can be concluded as deformation,cracking and falling.
作者
梁宸
王迎超
Liang Chen;Wang Yingchao(State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,P.R.China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2023年第5期1699-1707,共9页
Chinese Journal of Underground Space and Engineering
基金
徐州市重点研发计划(社会发展)(KC21298)
国家级大学生创新训练计划资助项目(202110290016Z)
江苏省高等学校大学生创新创业训练计划项目(202210290139Y)。
关键词
隧道工程
爆破荷载
裂隙围岩
节理
塌方规律
离散元
tunnel engineering
blasting load
fracture surrounding rock
joint
collapse law
discrete element
