With the increase of span of arch Bridges, ultimate load-carrying capacity has received more attention in design and construction.

Concrete was poured in separately from mid-span of arch slab to the supports and then from the supports to the top chord of the arch chord so as to balance the pouring load.

Hanjialing Mountain tunnel is a key engineering in reconstructing the expressway from Shenyang to Dalian, and it is a highway tunnel with the greatest across span of arch in Asia.