盾构机管片密封垫密封特性分析
Performance Analysis of Shield Machine Segment Gasket

DOI: 10.12677/HJCE.2019.810162, PP. 1387-1395

Keywords: 盾构机，管片密封垫，密封性能
Shield Machine, Segment Gasket, Sealing Performance

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Abstract:

针对山西省某引水工程施工设计为单线单洞，隧洞防水要求高、埋深大等难点，在矩形橡胶压缩弹簧计算公式的基础上，引入η为类矩形形状因子变化系数，从而计算管片密封垫所受的压缩力，同时基于橡胶Mooney-Rivlin本构模型的基础上，采用有限元方法分析了盾构机管片密封垫密封性能。结果表明：随着压缩量的增大，管片密封垫所受的力也在增大；理论计算跟仿真分析管片密封垫压缩量为5 mm时，密封垫的所受压力为分别为1.69 MPa和1.79 MPa相差较小，且同时大于所处的水土压力值，满足密封性能。研究结果为管片密封垫设计提供了理论参考，对隧道掘进机在高水土压力环境中的施工具有重要工程价值。
In view of the difficulties in the construction design of a water diversion project in Shanxi Province, such as single track single tunnel, high waterproof requirements and deep buried depth of the tunnel, on the basis of the calculation formula of rectangular rubber compression spring, η is introduced as the coefficient of change of rectangular shape factor, so as to calculate the compression force on the segment gasket. At the same time, based on the rubber Mooney-Rivlin constitutive model, the finite element method is used to analyze the shield Sealing performance of segment gasket. The results show that: with the increase of compression, the force on the segment gasket is also increasing; when the compression of the segment gasket is 5 mm, the pressure on the gasket is 1.69 MPa and 1.79 MPa, respectively, which is smaller, and larger than the water and soil pressure, which meets the sealing performance. The research results provide a theoretical reference for the design of segment gasket, which is of great engineering value for the construction of TBM in the environment of high water and soil pressure.

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