【摘要】 盾构区间洞门环梁是整个地铁工程防水体系中重要且薄弱的一环。当前对于盾构区间洞门环梁防水关键技术的研究相对较少，工程实施上也多以控制施工质量为主，盾构区间洞门渗漏水问题仍未得到有效解决。本文以对盾构区间洞门环梁渗漏水的原因和机理分析为出发点，对盾构区间洞门环梁构造特点、止水关键点以及当前存在的不足之处进行了分析和总结，并有针对性地提出了优化方向和建议。更多还原

【Abstract】 The shield tunnel portal ring beam is an important and weak part of the entire subway waterproofing system.Current research on key waterproofing techniques of portal ring beam is relatively limited, and engineering practice mainly focus on construction quality control. Therefore, the problem of water leakage in the shield tunnel portal ring beam remains unresolved. This article analyzes and summarizes the structural characteristics, key waterproofing point, and existing shortcomings of the shield tunnel portal ring beam based on the analysis of the causes and mechanisms of water leakage in the portal ring beam. This article also puts forward the optimization direction and suggestions.更多还原