南京长江隧道泥水盾构穿越江中超浅覆土段施工技术

Techniques for a Slurry Shield Under-passing the Section with Super Shallow Cover in Nanjing Yangtze River Tunnel

根据南京长江隧道超浅覆土段工程地质概况进行了盾构施工风险分析,在对泥水压力、泥浆参数计算设定的基础上制定了严密的施工方案,加强了施工过程信息化管理,确保了安全快速地通过该地段。文章所述技术的成功运用为地下工程施工技术领域积累了宝贵经验,填补了国内同类型地质条件下超大型盾构江中超浅覆土安全穿越的施工空白。

According to the engineering geology of the section with super shallow cover in Nanjing Yangtze River Tunnel,the risks of shield tunneling were analyzed.Based on the calculation of slurry pressure and slurry param-eters,a rigorous construction scheme has been drawn up to strengthen the information-oriented management dur-ing the construction and to ensure the safty of rapidly under-passing the section with super shallow cover.The technique successfully adopted herein not only has accumulated valuable experience in the field of underground engineering,but also has filled in the construction gap in China for large slurry shield safely under-passing super shallow covered section in silty sand strata.