The Study Of Detective Technics For Uneven Supporting Cement Concrete Pavement

Cement concrete pavement is one of high class pavement. Because of its high strength, good stability and durability and benefit to driving at night, concrete pavement was used widely in the construction. But as the exist of basement uneven supporting, conventional practicality force state of Cement concrete pavement has been changed. At the same time heavy loads and multi-axles wheel loads increase, they all make the tensile stress in the plate improves at a big degree, and early rupture of cement concrete pavement plate are seen everywhere. Grouting filling of cement concrete pavement is a efficient measure in solving basement uneven supporting and avoiding early rupture, but the implemention of grouting filling is done after the basement supporting was assessed exactly.Through pavement deflection to assess the supporting of the pavement. Get the basement modulus by the deflection of pavemen, assume that the supporting in the central of the plate is ideal. Through the ratio of the modulous to know the result.Computational model was established on the basis of actual pavement structure. Infliction loads on the central of the plate, margin central of the plate, the corner of the plate, get to know the function relation between the deflection and structure parameter of the cement concrete pavement. Regress the deflection on the three location to get the common formula. Utilize the deflection getted by girder model deflection instrument to validate the common formula.Pavement structure and the load location influence the result severitily at the same load magnitude. So it is not reasonable to judge the supporting complexion by a single deflection confine value. There are lots of function differences between deflection and pavement structure parameter, therefore the common formulas of the three location is different.