|
With the increase in traffic , the vehicle axle load , wheel pressure is getting heavier and heavier , the road department needs to improve road design , construction , conservation and maintenance of technical level , and to develop relevant technical specifications . On the road surface condition and performance in order to meet these requirements, it is necessary in the case close to the actual conditions of use rapid test study , test results obtained in the shortest possible time , to guide the practical work , the full scale accelerated loading road test (HVS ) good to meet this requirement , can be applied in different road types , different road materials on empirical comparison of different load types can also be used in on pavement response and material situation of the validation of the theoretical model . For domestic form of a system based on the fact that accelerated loading of the internal sensor measurement test methods of the pavement structure , this article by the composition of HVS , the use primary requirements , new features , as well as the HVS equipment debugging depth analysis and proposed set applies to the issues of HVS own placement , manipulation and maintenance methods and the use of the process should be noted . Test pavement structure combined with foreign experience , research and analysis of sensor selection , school inspection , installation the buried technology and the data acquisition system , and a the pavement structural test sensor choice , school inspection , installation buried . Through research at home and abroad to accelerate the loading method , an appropriate set of accelerated loading , including loading methods and test segment is divided . By paving the test road using LabVIEW software platform , NI data acquisition system , the rut instrument and Beckman Beam tool performance parameters ( such as rutting , cracking, deflection , etc.) , on the road and the pavement of the response ( such as stress , strain , etc. ) for the measurement and analysis process .
|