超高水压盾尾密封性能试验台设计与研究  

Design and Research of Test Bed for Sealing Performance of Shield Tail Under Ultra-High Water Pressure

作　　者：李大伟 沈桂丽 杨建权 石安政 LI Dawei;SHEN Guili;YANG Jianquan;SHI Anzheng(Equipment Branch of China Railway Tunnel Group Co.,Ltd.,Luoyang 471009,Henan,China)

机构地区：[1]中铁隧道局集团有限公司设备分公司,河南洛阳471009

出　　处：《隧道建设（中英文）》2023年第5期874-878,共5页Tunnel Construction

摘　　要：为从机制上深入研究超高水压下盾尾密封性能,利用机、电、液相关控制技术研制出超高水压盾尾密封性能试验台,重点设计要素有:1)动作姿态设计,试验台通过控制油缸伸缩实现轴向移动、径向移动和转向偏转等动作,模拟盾构掘进过程中的姿态变化;2)油脂供给设计,采用由5道盾尾刷形成的4个油脂腔,模拟超高水压盾构盾尾密封设计;3)超高水土压力供给设计,设计一套安全、可靠、承压可达2.5 MPa的泥水循环保压系统,模拟盾构超高水土压力。试验台为模拟超高水压复杂施工环境做好了充足的准备,通过后期测试在超高水压下的静态、动态盾尾密封性能,研究不同的水土压力、油脂腔数量、油脂质量、盾尾刷质量以及盾构掘进姿态、管片错台等因素对盾尾密封性的影响程度。To conduct an in-depth investigation of the sealing performance of the shield tail under ultra-high water pressure in principle,a test bed is developed based on mechanical,electrical,and hydraulic control technologies.The key design elements are as follows:(1)attitude design:The test bed can achieve axial movement,radial movement,and steering deflection by the expansion and contraction of oil cylinders,which can simulate the posture changes during the shield tunneling process;(2)oil supply design:Five shield tail brushes form four grease cavities for simulating the shield tail under ultra-high water pressure;(3)design of an ultra-high water pressure supply:A mud-water circulation pressuremaintaining system is designed for simulating ultra-high water pressure outside the shield,which is safe,reliable,and can withstand a pressure reaching 2.5 MPa.Factors such as the mud-water pressure,number of grease cavities,shield tail grease and brush quality,shield tunneling attitudes,and segment dislocation,that affect the static and dynamic shield tail sealing performance under ultra-high water pressure,are determined by subsequent tests.

关 键 词：盾尾 超高水压 密封性能 管片姿态 试验台设计 

分 类 号：U45[建筑科学—桥梁与隧道工程]