Study On The Structure Test-Method Of Asphalt Pavement Based On Internal Sensor Survey

Highway pavement is a kind of special zonal structure, long-term exposed in nature environment, and it is deteriorating at load, temperature, water and so on. It is difficult to veritably understand the mechanics response of pavement structure in actual environment by regular method, but it can veritably understand pavement structural mechanical response via embedded sensors in pavement structure, and can supply testing data support for the research of pavement mechanics theory.At present inland not yet form one systemic sensor-based pavement structural test system and method, the paper makes study on pavement structural test method actual environment depend on sensors, acquire test data by sensors, put forward a suit of the structure test-method of asphalt pavement based on internal sensor survey.The method breaks through the drawback of the tradition laboratory experiment, considers the interaction among pavement structural layers, at the same time can consider the effect of environmental factors,such as temperature and humidity and so on .Utilizing labview software platform and NI data acquisition hardware system,written calling program of data acquisition cards, included strain collection programs, pressure collection programs and temperature collection programs.Researched and analysed the checkout and embedment technology of sensors, considering abroad pavement structural test experience, put forward the checkout method of sensors and the embedment method of sensors, considering temperature, moisture, mechanical vibration, test equipment and vehicle and so on. Contrast both theoretical calculation value and test value, appraise the difference between theoretical calculation and actual test value at the both side of connecting state of interlayer and the surface modulus.Proven:It's different very much between the result of different softwares, some variation trend of stress actually reverse, it is obvious that software calculate cannot verity reflect practical situation.