Oblique Prestressed Concrete Pavement Structure Research Of Road Tunnel

With the development of social economy in China, the pace of highway tunnelconstruction has been speeding up and traffic safety in tunnel has received public attention. Inthe past, the pavement of highway tunnel was mainly plain concrete pavement. However, withthe increase of motor vehicles and overloading, plain concrete pavement often emerges thedamages like crushing, hunching up and dislocation. Because the inner circumstance ofhighway tunnel is relatively severe, the damages to the pavement will have a great influenceto the traffic safety so it is necessary to improve the current concrete pavement in the tunnel.Compared with many traditional concrete pavement, prestressed concrete pavement has agreat advantages which could make up for the deficiency in traditional pavement in highwaytunnel. Thus, it is a need to research on prestressed concrete pavement.Based on some existing problems about prestressed concrete pavement like excessiveloss of vertical prestress, restricted vertical length of road slab, high strength requirements ofprestressed concrete of anchor head and can’t continuous construction, the paper presents abrand-new oblique unbounded prestressed concrete pavement structure. Secondly, a numericalanalysis model of prestressed concrete pavement is established which is divided into subbase,base and pavement course; finally it is combined to a prestressed concrete pavement model.Adopting smeared model in prestressed pavement course and looking prestress as an externalforce on anchor head which matches the characteristics of unbounded prestressed structure.The paper comprehensively researches The wheel load stress、warping of temperaturestress、bulge and shrink of temperature stress and linkage themselves of prestressed concretepavement under different parameters using the numerical simulation method and finallyobtains different performance index of different parameters arrangement of prestressedconcrete pavement which provides technical support to the design of oblique prestressedconcrete pavement in highway tunnel.