浅谈佛山市汾江路南延线工程沉管隧道特点及关键技术

Discussion of the Characteristics of and Key Techniques for the Immersed Tunnel of the South Extension Line in Fosan

佛山市汾江路南延线工程沉管隧道是我国国内第一条建于内河中上游的沉管隧道,同时也是国内公路与地铁合建工程中规模最大的沉管隧道。由于隧址处地理位置特殊,周边环境、工程地质条件恶劣,再加之工程工期短、结构复杂,导致该工程具有诸多技术难点。文章从沉管隧道横断面设计、干坞方案、基槽开挖、沉管隧道覆盖层等几个方面,对佛山市汾江路南延线工程沉管隧道特点及关键技术进行了论述。

The immersed tunnel of the south extension line in Foshan is the first immersed tunnel to be built in the middle and upper reaches of an inland river, and the largest scale road-metro combined immersed tunnel. Because of the tunnel＇s sensitive location, adverse geological and environmental conditions, a short construction timeframe, and its complex structure, there are many technical difficulties to be solved. This paper describes the characteristics of and key techniques for the immersed tunnel of the south extension in terms of the cross section design, dry dock scheme, trench excavation, and covering of the immersed tunnel.