5m of the super-large cantilever pre-stressed concrete cov- er beam in Wuhan Middle Ring Line West Ring Section Road Rebuilding and Extension Project as the analyzing example,the article simply sets forth the analysis and comparison of the plane and space stress characteristics of the pre-stressed concrete cover beam.

Combining with the Chongqing Caiyuanba Changjiang River Great Bridge project,authors introduce some aspects of a light large cantilever rhombic hanging basket such as design principles, general structure and structural analysis and calculation.

This paper takes Songhua River Bridge construction as an example,based on the geographical environment and climate conditions of this project,analyzes in detail the large cantilever stability of this bridge under the wind load and offset load in winter,puts forward several load combination loading methods,and introduces the safety measures taken for this bridge.

Analysis of shear lag effect of great cantilever steel box beam;

Combining the testing project of some Gym Center, this paper puts forward Space Influence Coefficient in prestressing lean large-span cantilever beam and makes a theoretical and practical analysis.

Next,three aspects were considered as key technology and research challenges of bascule bridge deck surfacing here,(i)development on light paving material and research on thin deck surfacing system,(ii)numerical simulation of the mechanical properties of bascule bridge deck surfacing based on long cantilever structure and contact behaviors between interfaces,(iii)bonding layer material testing.