为解决盾尾密封损坏导致的工程安全和进度问题,通过跟踪、统计多项盾构隧道工程盾尾密封使用和更换情况,总结盾尾密封的失效形式,并分析盾尾密封失效的原因,主要表现在盾尾密封设计缺陷、盾尾刷制造与安装质量差、油脂填充质量不高、施工过程控制不严以及应急预案准备不充分等方面。提出基于全过程管理理念的盾尾密封管理方法,从盾尾密封设计、盾尾刷制造和安装、初装油脂、施工管理、应急管理5个阶段,对盾尾密封的全过程管理要点和对策进行系统研究。该方法在中俄东线天然气管道长江盾构穿越工程得到成功应用,保障了盾构施工中盾尾密封安全,为盾尾密封的科学管理提供了新的思路和举措。
Damaged shield
tail seals often cause safety and progress problems. As a result, the failure
modes of shield tail seals are outlined by summarizing shield tail seal usage
and replacement cases in various shield tunnel projects. Thereafter, the causes
for shield tail seal failure are analyzed, including design defects, poor manufacturing
and installation quality, poor grease filling quality, loose control of the
construction process, and insufficient emergency plan preparation. Thus, a
shield tail seal management method based on the concept of entire process
management is proposed, and the key points and countermeasures of entire
process management of shield tail seals are systematically studied from the
aspects of the design of shield tail seal, manufacturing and installation of
shield tail brush, initial filling of grease, construction management, and
emergency management. Furthermore, this method was successfully applied in the
Yangtze rivercrossing shield tunnel of the SinoRussia
eastern natural gas pipeline project, which ensures the safety of the shield
tail seal in shield tunneling and provides new ideas and measures for
scientific management of shield tail seals.