小净距并行隧道力学状态的试验研究  

EXPERIMENTAL STUDY ON MECHANICAL CHARACTERISTICS OF TWIN TUNNELS WITH SMALL SPACING

作　　者：刘艳青[1] 钟世航[2] 卢汝绥[2] 马荣田[2] 

机构地区：[1]北方交通大学,北京100044 [2]铁道部科学研究院,北京100081

出　　处：《岩石力学与工程学报》2000年第5期590-594,共5页Chinese Journal of Rock Mechanics and Engineering

摘　　要：招宝山隧道作为我国第一座超小净距 (<0 .2 8B)并行隧道的实践工程 ,准确掌握隧道在不同施工过程中的力学状态 ,是该工程成败的关键。为此 ,在设计前对隧道施工状态进行了有限元数值计算模拟 ,施工中对地面沉降、洞周收敛、拱顶下沉、岩体位移、围岩压力、支护结构应变、围岩松弛范围及爆破破坏深度等进行了系统测试工作 ,有力地保证了这一设计施工新技术的顺利实施 。Zhaobaoshan road tunnels are the first twin tunnels with small spacing in China. The length, width B and height of the tunnels are 169, 14.15 and 12.35 m, respectively. The clear distance between twin tunnels is less than 0.28 B.  In design and construction, it is critical to grasp the mechanic characteristics of the twin tunnels under different construction processes to insure successful work. Therefore, the mechanical characteristics are studied by FEM before design, and during construction, and systematic measures are performed, including ground surface settlement, convergence, crown settlement, ground displacement, earth pressure, support structure deformation, loosen zone, and broken depth due to explosion.

关 键 词：隧道 并行隧道试验 力学状态 围岩压力 

分 类 号：U456[建筑科学—桥梁与隧道工程] U451.2[交通运输工程—道路与铁道工程]