盾构到达是盾构法施工中的重大风险点之一。当盾构到达端地层自稳性较差时,通常会采用搅拌桩、旋喷桩或注浆等方法进行端头预加固处理。但也存在盾构进入加固区后发现加固效果不满足要求的情况,这时再加固处理的难度很大。本文通过实例介绍一种盾构碰壁后端头加固失效再处理技术,以供同仁参考。 Shield arrival is one of the major risk points in the construction of shield. When the self-stability of the shield arrives at the end of the formation is poor, usually using mixing piles, grouting or grouting pile tip pre-reinforcement treatment. However, there is also a situation where the reinforcement does not meet the requirements after the shield enters the reinforcement zone, and then the reinforcement is very difficult. In this paper, an example introduces a shield wall rear end reinforcement failure re-processing technology for colleagues reference.