Jiqing high-speed reconstruction and expansion project is based on the original two-way four-lane, roadbed width of 26m, to widen and rebuild. Namely, based on the original roadbed width, the width of both sides will be broadened by 8m, and the roadbed width will be increased to 42m. The highway grade shall be rebuilt and expanded according to the standard of expressway and two-way eight-lane highway, with a design speed of 120km/h.
（1）The recycling scheme of emulsified asphalt cold regenerated mixture was determined；
（2）To form a complete set of standardized construction technology for emulsified asphalt plant mixed with cold and recycled mixture to meet the performance requirements of highway heavy-duty lane driving；
（3）A complete set of standardized construction technology of green reclaimed water stable milling and planing materials which can meet the performance requirements of expressway heavy-duty lane driving is formed；
（4）To form a complete set of standardized construction technologies for green reclaimed old roads and Bridges of expressways.
On the basis of this project, the application research of green and comprehensive regeneration technology of highway reconstruction and expansion of old roads. A total of 16 complete patents (10) 6 invention patents, utility model, published 11 papers, can the five, forming the emulsification LiQingChang mix cold recycled asphalt milling planer integrated recycling programme, the emulsification LiQingChang mix cold regeneration in overloading traffic lanes the material composition design and performance of the application, and the emulsifying LiQingChang mix cold regeneration overloading lanes in reconstruction engineering construction technology ", "the highway reconstruction of old road milling planer recycling material on the base of the cement stable macadam mixture green renewable grassroots" key construction technology and the reconstruction of old road, the highway bridge concrete key construction technology of "green renewable five innovation technology.
FIG. 1 Old path milling
FIG. 2 Old path milling
FIG. 3 Demolition of the old bridge
FIG. 4 Hard road shoulder milling
FIG. 5 Stable construction of reverse excavation water
FIG. 6 Laying of middle surface layer
FIG. 7 Middle surface rolling
FIG. 8 Upper layer of asphalt
FIG. 9 Upper layer of asphalt
FIG. 10 Left pitch laying