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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 ,并为该技术在今后类似条件下的工程应用及完善提供了宝贵的经验
Zhaobaoshan tunnel as the first ultra-small clear distance (<0 2 8B) parallel tunnel practical project, accurately grasp the tunnel in different construction process of the mechanical state, is the key to the success of the project. Therefore, before the design of the tunnel construction status by finite element numerical simulation, the construction of the ground subsidence, convergence of the cave, the dome sinking, rock displacement, surrounding rock pressure, supporting structure strain, rock relaxation range And the depth of blasting damage were systematically tested, effectively ensuring the successful implementation of this design and construction of new technologies, and the technology in the future under similar conditions, the application and improvement of the project provided valuable experience