The article mainly presents the stress analysis and stiff skeleton design at the closure sector.

Brief talk on effect of the stiff skeleton in the high pier construction

Combining with the practical cantilever construction of a continuous box beam bridge, authors analyze the setting-up and stress of the stiff skeleton at locking section of the middle span, deduce theoretical calculation formulas for designing a stiff skeleton, and state the influence of stiffness of a stiff skeleton on the general structure of a bridge.

This paper discusses the construction charateristics of a reinforced concrete areh bridge with stiff skeleton of concretefilled steel tubes.

This paper introduces concreter construction scheme, stiffen framework installation, ring pre-stress setting of main tower of Songhuajiang cable-stayed bridge.

In Hongfenghu long Span Bridge construction,stiff skeleton method is adopted to implement closure of main span and side span, by taking a series of measures to assure construction quality,the safe of structure stress and the easement of main beam alignment are assured in the course of closure segment construction.

The initial stress of the steel skeleton is explained, then the methods of testing the initial stress are presented, and some problems such as the welding techniques of the steel skeleton, the temporary fixing of arch springing, the swing system, the bracket removal and closure of the steel skeleton are discussed.

Connecting with the field process and assembly of the steel skeleton for Diaozhongyan arch bridge, this paper introduces the coordinates calculation of the steel skeleton, the construction bracket, the welding parameter of the Q345-C steel, the controlling of welding deformation, assembly technology and etc.