4 tunnel in the 51st bidding section of Xihan Superhighway, and in the light of the features of the tunnel under the weak geological condition, this paper puts forward corresponding pre-controlled construction scheme, which includes the excavating and supporting, monitoring and measuring, and the construction of big arch springing and temporary inverted arch, etc.

Sectional Optimization and Procedures on Steel Truss Arch Structure;

The main part of Yaojiang Bridge at Chengzhuang Rd, Ningbo is a continuous 3-span (48 m+180 m+48 m) through steel truss arch bridge, and introduced hereby are the layout of the bridge, the structural design, some key design techniques and the guiding sequence of construction.

It introduces the supporting method of "advanced anchor shaft combined with reinforcement centering spraying concrete" in Qingdao "902" Project, which achieved good effect under the complicated geographic condition characterized by broken rock and thin covering layer and thus accumulated successful experience.