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采用明挖暗埋法在既有城市公路下修建连拱隧道,是解决城市交通的一个创新。通过明挖法施工,解决了暗挖法无法解决的浅层隧道施工的安全和浅层地下管线问题。施工中通过应用大桩径的超前支护桩、台阶式开挖、信息化施工、隧道跳仓施工和隧道自防水加外加防水等技术,确保了隧道不渗不漏,通过SMW支护桩的应用成功解决了隧道与地铁的交叉施工问题,使隧道成功下穿城市公路。
The use of digging burial method in the existing urban roads to build multi-arch tunnel is to solve an urban transport innovation. Through the excavation method, the problems of shallow tunnel construction and shallow tunnel construction can not be solved by the method of undercutting. In the construction, the technology of applying advanced pile with large pile diameter, step excavation, information construction, tunnel hopper construction and tunnel self-waterproofing plus additional waterproofing technology ensures that the tunnel will not seep and leak through the SMW supporting pile Application successfully solved the cross-tunnel construction and subway problems, the tunnel successfully under the city highway.