The Application Of Oblique Prestressed Concrete Pavement Technology Research

Cement concrete pavement in long-term adverse natural environment and under the action of vehicle load,exposed some defects of itself,mainly for damage of the concrete slabs and the joint damage,such as fracture,arch,wrong table,pumping mud,spalling and other diseases.So to improve the pavement performance,improve the bearing capacity of pavement and reduce the pavement cracks,this paper on the diagonal reinforcement of prestressed concrete pavement is studied,and applied to practical engineering,promote fast and good development road.In this paper as the following several aspects of research:(1)According to further research<prestressed concrete pavement engineering and technical specifications>diagonal elastic design criteria prestressed reinforced cement concrete pavement,mainly load stress,thermal stress and stress related subgrade friction.Due to the elastic design crilteria require concrete slab does not produce any cracks are too conservative,made oblique partially prestressed pavement fatigue design criteria,the design criteria is considered unique in size and value of the vehicle load prestressed repeated cycles role.(2)Develop a computational model based on oblique prestressed concrete design methods,theoretical calculation method estimates take different angles at different fabric reinforcement road width prestressing losses and apply ABAQUS finite element method is applied after the effective end of the horizontal and vertical Slab the stress distribution;Buckling temperature value by calculating the heat,get diagonally reinforced prestressed concrete pavement thermal buckling effect does not occur.(3)Entity works on pavement reinforcement and anchorage area checking locally confined area,and made a request test road materials,construction processes and key technologies.(4)Life-cycle cost analysis using comparative methods annual fee equal to the diagonal method prestressed concrete pavement,concrete pavement drill rod dimensions and Portland Cement Concrete Pavement can be drawn diagonally prestressed concrete pavement was first built,although the high ccost but later maintenance costs far less than other road structures.