Research on the Technical Condition Evaluation and Utilization Plan of Hard Shoulder in Expressway Reconstruction and Expansion Project
The technical condition of hard shoulder in expressway reconstruction and expansion projects affects the spli-cing method and position of new and old pavement,also related to the social and economic benefits of the project.Based on the reconstruction and expansion project of the Shanghai-Wuhan Expressway,firstly,the structural performance of the hard shoulder pavement was analyzed using representative values of deflection,deflection basin parameters,and deflection ba-sin back calculation modulus;secondly,the mechanical properties of the hard shoulder asphalt surface layer were analyzed using dynamic modulus tests,the crack resistance of the asphalt surface layer was analyzed based on semi-circular bending tests,the water damage resistance of the hard shoulder asphalt surface layer was analyzed using immersion Marshall tests and freeze-thaw splitting tests,the aging degree of the asphalt surface layer was analyzed based on asphalt recovery tests,the me-chanical properties of the base layer were analyzed using unconfined compressive strength and rebound modulus tests;finally,the utilization plan of hard shoulder was analyzed and the pavement structure verification was carried out.
expresswayreconstruction and expansion projecthard shoulderpavement structural strengthpavement mate-rial properties
万方数据
维普
