华南快速路石门堂山四车道新奥法隧道扩建工程总体设计

Overall Design of South China Expressway Shimentang Mountain Four-lane Tunnel Extension Project by New Austrian Method

摘要:

石门堂山隧道扩建工程路线总长约2 km，拟新建长720 m的超大跨度单洞四车道隧道，是国内首条既有连拱隧道侧新建的超大跨度隧道。隧道扩建工程实施后将与原双向四车道连拱隧道组合成双向八车道断面，有效打通交通瓶颈，缓解该处拥堵问题。

关键词:总体设计;超大跨度隧道;四车道隧道;连拱隧道;新奥法

Abstract:

The total length of Shimentang Mountain Tunnel Extension Project is about 2 km. It is proposed to construct a 720-m long oversized-span single-hole four-lane tunnel, which is the first oversized-span tunnel newly built at the side if the existing multiple arch tunnel in China. After the implementation of the tunnel expansion project, the original two-way four-lane multi-arch tunnel will be combined into a two-way eight-lane section tunnel, which effectively open the traffic bottleneck and alleviate the congestion problem at this place.

Key words:overall design, super-large span tunnel, four-lane tunnel, multi-arch tunnel, New Austrian Method