According to related specifications, there are two open excavation sections set at both the south and north ends of Yuhan Tunnel for the southern extension section of Shunhe Viaduct, and time-staggered construction measures are taken for the both open excavation sections to reduce the impact on the traffic, which will be open to traffic in succession.
根据相关规范要求，顺河高架南延玉函地道在南北两端设置了两处明挖段，为减少对交通的影响，南北两端明挖段采取错时施工，陆续放开交通。