Considering the seam texture properties,a method was proposed to recognize the weld seam image,which consisted of two steps: image processing by modified sobel edge detector and recognition of seam by applying domain integration.

The article introduces the preparatory work at early stage of bituminous pavement construction,and illustrates the quality control at construction stage from mixing and transport of bituminous concrete,construction survey,setting out and double check,paving,rolling and molding of bituminous concrete,and joint treatment,in order to increase durability of bituminous pavement.

The article introduces bridge widening design in Zhengzhou section reconstruction project in Lian-Huo expressway which contains the methods to widen bridge deck,upper structure and sub-structure,and compares the schemes of bridge vertical joint treatment,which to offer a reference for relevant designs.