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采用土压平衡式盾构施工,具有自动化程度高、施工速度快、对地面环境影响小的特点,已广泛应用于各类型隧道修建工程。针对土压平衡式盾构推进系统,在随机载荷条件下,构建出系统推力的力学模型,基于力均方差最小和相对偏差最小的原则,完成了液压缸布局优化方法的研究,并采用优化模型对现有直径为6.28m盾构推进系统进行了布局分析和设计。结果表明:优化后的布局比现有布局更有利于避免管片被压溃,为盾构推进系统的设计与开发建立了理论基础。
Equipped with earth pressure balance shield construction, with a high degree of automation, construction speed, small impact on the ground environment has been widely used in various types of tunnel construction. For the EPB shield propulsion system, the mechanical model of the system thrust is built under the random loading conditions. Based on the principle of minimum force average square deviation and minimum relative deviation, the optimization of hydraulic cylinder layout is completed and the optimization model The layout analysis and design of the existing 6.28m shield propulsion system were carried out. The results show that the optimized layout is more conducive than the existing layout to avoid the crushing of the segments, and establishes the theoretical foundation for the design and development of the shield propulsion system.