盾尾密封是盾构形成密封式结构的关键点之一。施工中盾尾密封失效会造成盾尾漏水漏浆,严重影响盾构掘进,甚至可能造成地面沉陷、水淹隧道等事故。本文根据多年盾构施工的实践,介绍了几项保障盾尾密封有效性的技术措施。 Shield tail seal is one of the key points of the shield to form a sealed structure. In the process of construction, the shield tail seal failure will cause the shield tail leaking slurry, seriously affecting the shield tunneling and may even cause ground subsidence and flooding tunnel accidents. Based on many years of shield construction practice, this paper introduces several technical measures to ensure the effectiveness of shield tail seal.