Road Structure Temperature Field Research

The early dilapidation of higher grade highway is being paid more attention to. In order to solve this problem, improve life period and service level of higher grade highway, Long-Term Pavement Performance(LTPP) study must be done, environment field is a important part and foundation of LTPP study.This paper chose the important part of environment field, namely temperature field as research object, looking pavement structure as samdwich, according to heat conduction theory deduce the analytic solution of one dimension unstable state temperature field modified by year temperature of pavement structure in natural environment, tested by practically measure, the analytic solution of temperature field accords with the temperature distributing law of pavement structure. On this base, the paper analyzed influence factors of temperature field of pavement structure, and brought out calculating formulas of the maximal and minimum pavement temperature, the maximal temperature speed, the maximal temperature grads, and so on, all of these can provide theory bases for design of pavement structure and LTPP study.