摘要
南京纬三路过江通道工程是目前已(在)建的地质条件最复杂、工程技术难度最高、挑战性最大的大直径泥水盾构工程之一,其成功穿越了浅覆土地层、上软下硬地层,实现了氦氧饱和气体带压进舱、盾构直接穿越风井等高难度作业。文章针对该工程特点和施工难点,通过对工程中关键技术的分析和研究,总结了浅覆土地段盾构的安全可靠理念和适用于泥质粉砂岩上软下硬地层的掘进原则,系统地形成了一套完整可靠的超大直径泥水盾构始发技术、饱和带压进舱更换刀具技术,对超大直径泥水盾构施工技术的发展具有重要的参考价值。
The Nanjing Weisan Road river-crossing tunnel has some of the most complex geological conditions and engineering technical difficulties of any existing and under-construction large-diameter slurry shield tunnels. During the construction process, the large-diameter slurry shield machine has successfully passed hrough shallow ground as well as soft upper and hard lower mixed ground, and has directly passed under the ventilation shaft. Furthermore, hyperbaric chamber intervention technology with a saturated helium-oxygen mixed gas was success- fully introduced for this project. In this paper, the key construction technologies used in this project are studied regarding engineering characteristics and construction difficulties; the safety concept and excavation principles for the shallow ground, soft upper and hard lowe rmixed ground are proposed; and a complete set of safe, reliable technology for extra-large diameter slurry shield launching and saturated hyperbaric chamber intervention is summarized, providing a significant reference for the development of extra-large diameter slurry shield-driven tunnel technology.
出处
《现代隧道技术》
EI
CSCD
北大核心
2015年第4期15-23,共9页
Modern Tunnelling Technology
基金
交通部建设科技项目(2013 318 Q03 030)
关键词
水下隧道
大直径泥水盾构
关键技术
Underwater tunnel
Large-diameter slurry shield
Key technology
