The aim of this study is to optimize the characteristic parameters of the segmental joints based on the contact pressure of sealing gasket. The design status of shield tunnel segment joint sealing gasket material, cross-section type, and holes arrangement through statistical data are first analyzed using the numerical simulation method. The result of this study indicates that the linear regression analysis of the outer contour parameters of the gasket was carried out using the bottom edge length of the gasket as the control variable in accordance with the statistical samples, and the influence of geometric parameters on the waterproofing design of sealing gasket is analyzed by numerical simulation from the aspects of the number of closed holes, the shape of closed holes, and the change of the opening rate in different parts. Characteristic parameters optimization of rubber hardness parameters on waterproof design of sealing gaskets have been completed on the contact pressure of sealing gasket for segmental joints. It provided some references for the design, production, processing, and quality inspection of shield tunnel gasket in the future.

这项研究的目的是基于密封垫圈的接触压力来优化分段接头的特征参数。首先采用数值模拟的方法，通过统计数据分析了盾构隧道管段接头密封垫片材料的设计状况，截面类型和孔的布置。研究结果表明，根据统计样本，以垫片的底边长度为控制变量，对垫片的外轮廓参数进行了线性回归分析，以及几何参数对防水性能的影响。从封闭孔的数量，封闭孔的形状以及不同部位开孔率的变化等方面，通过数值模拟对密封垫片的设计进行了分析。通过节段式密封垫圈的接触压力，完成了密封垫圈防水设计中橡胶硬度参数的特征参数优化。它为将来的屏蔽隧道垫片的设计，生产，加工和质量检查提供了一些参考。