Study On The Key Technology For Subgrade And Pavement Widening Of Expressway

This text makes the systemic introduction to the situation on the widening of highway at home and abroad, expatiating the research purpose and significance. Disease examinations and disease causes of the old road of widening of highway was studied, and the corresponding measures for the treatment was provided. Then, described the technical measures of subgrade widening splicing at an application of the AnXin freeway widening project. Study the damage patterns and mechanism of the pavement and subgrade. And discuss the design theory of wideing freeway pavement and subgrade. Finally, research the construction organization design principles of the freeway wideing project. Put forward the results of research on this article, and make the recommendations of the further study.