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隧道建设(中英文) ›› 2023, Vol. 43 ›› Issue (4): 711-720.DOI: 10.3973/j.issn.2096-4498.2023.04.017

• 施工机械 • 上一篇    下一篇

大直径盾构常压复合刀盘滚刀刀筒结构设计与分析

张帅坤1 2   

  1. 1.中国铁建重工集团股份有限公司, 湖南 长沙 4101002. 湖南大学机械与运载工程学院, 湖南 长沙 410100
  • 出版日期:2023-04-20 发布日期:2023-05-23
  • 作者简介:张帅坤(1984—),男,河南驻马店人,2008年毕业于郑州大学,机械工程及自动化专业,本科,高级工程师,现从事隧道掘进装备研发设计工作。E-mail: 411915836@qq.com。

Design and Analysis of Disc Cutter Barrel Structure of Atmospheric Composite Cutterhead of LargeDiameter Shield

ZHANG Shuaikun1, 2   

  1. (1. China Railway Construction Heavy Industry Co., Ltd., Changsha 410100, Hunan, China; 2. College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410100, Hunan, China)
  • Online:2023-04-20 Published:2023-05-23

摘要: 为解决大直径盾构常压复合刀盘后置式滚刀刀筒在实际应用中螺栓受频繁交变应力影响易损坏的问题,通过借鉴国内外研究成果,设计前置式常压滚刀刀筒结构。将螺栓由受拉力承受滚刀推力的受力模式改变为刀筒直接承受滚刀推力,加强了对螺栓的防护。为验证该前置式常压滚刀刀筒的可靠性,通过理论与有限元分析相结合的方法,对前置式常压滚刀刀筒进行结构分析,包含静力学分析、模态分析及谐响应分析(静力学分析结果显示最大Mises应力未超过材料许用应力; 模态分析与谐响应分析结果显示刀筒工作频率远小于结构自振频率,有效避免共振失效的发生),验证了刀筒设计的合理性。将该设计方案应用于实际工程项目,结果显示刀筒未出现螺栓松动、断裂现象,也未出现常压复合刀盘刀筒刀座压溃、刀筒失效等情况。理论分析与实践结果均显示该刀筒结构设计合理,可应对目标工程的地质情况,可为后续类似工程刀盘刀筒的选型设计提供参考。

关键词: 大直径盾构, 常压复合刀盘, 后置式滚刀刀筒, 前置式滚刀刀筒

Abstract:  During shield tunneling, the bolt of the rearmounted disc cutter barrel of the atmospheric composite cutterhead of a largediameter shield is prone to damage caused by frequent alternating stress. To address this problem, a frontmounted barrel is designed by referring to relevant global research results. The force mode of the boltbearing disc cutter thrust is directly changed to that of a tool barrelbearing disc cutter thrust, which greatly strengthens the bolt protection. By combining theory and finite element analysis, including static analysis, modal analysis, and harmonic response analysis, a structural analysis of the frontmounted atmospheric disc cutter barrel is conducted to verify the reliability of the frontmounted atmospheric disc cutter barrel. The static analysis results show that the maximum von Mises stress does not exceed the materials allowable stress. The dynamic analysis results reveal how the operating frequency of the tool barrel is far less than the natural vibration frequency of the structure, effectively avoiding the occurrence of a resonance failure. The results validate the rationality of the tool barrel design. Accordingly, the design scheme is applied to an actual engineering project. The results demonstrate that the bolt loosening and fracture phenomenon does not occur in the tool barrel. No seat is broken, and the tool barrel failure phenomenon does not happen. In conclusion, the structural design of the tool barrel is reasonable and suitable for the project, providing a reference for the selection design of the tool barrel for similar projects in the future.

Key words: largediameter shield, atmospheric composite cutterhead, rearmounted type disc cutter barrel, frontmounted type disc cutter barrel