摘要
偏压连拱隧道不同的施工方法对岩体的受力特征和稳定性有着截然不同的影响,在地质条件较差的情况下该影响更为明显。本文运用FLAC2D对隧道合理开挖方法进行二维数值模拟研究,分析了某隧道在台阶法及双侧壁导坑法下围岩和中隔墙的应力应变情况,并分别对先开挖埋深较浅的一侧和先开挖埋深较深的一侧两种不同施工顺序进行分析比较,提出了类似条件下建议的施工方法。
Different construction processes of joint arch tunnels in partial pressure have very different effects on stress characteristics and stability of rocks,especially in the case of poor geological conditions.Here we adopt FLAC2D to simulate and study a reasonable method of tunnel excavation.We have analyzed the stress-strain conditions in the surrounding rock and mid-partition of a tunnel under the condition of bench method and both side heading method.The differences between excavating the shallower side first and excavating the deeper side first have also been compared.A proposed construction method has been raised in similar situation.
出处
《浙江交通职业技术学院学报》
CAS
2010年第2期4-6,41,共4页
Journal of Zhejiang Institute of Communications
关键词
软弱围岩
偏压连拱隧道
中隔墙
有限元
模拟计算
Weak surrounding rock
joint arch tunnels in partial pressure
mid-partition
FEM
simulating computation
