富水砂卵石地层中盾构隧道交叉重叠换边施工关键技术

在富水砂卵石地层中,盾构隧道交叉重叠换边施工尚属首次,为解决盾构掘进通过后地表不发生较大沉降、不对道路及管线造成破坏,在工程实施过程中采取了盾构掘进控制、地表注浆加固、洞内顶管注浆加固及施工监测指导施工的信息化施工技术,实践证明是比较成功的.

Alternated Construction Technique Applied to a Shield-Driven Tunnel in a Water-Abundant Sandy Pebble Stratum

For the first time,the alternated construction technique is applied to a shield-driven tunnel in a water-abundant sandy pebble stratum.In order to avoid sizeable ground settlements and damage to roads and pipelines after shield driving,the information oriented construction techniques of shield driving control,ground grouting reinforcement,pipe-jacking grouting reinforcement and construction monitoring were applied.These measures proved to be effective and successful.