Evaluation Of Checking And Measuring & Study On The Design Method Of Reinforcing Road Surface Of HunWu Arterial Highway

Through the investigation and analysis of the part of asphalt pavement of highway in Jilin Province which has been completed, the model of highway asphalt pavement traffic evaluation has been founded using PQI Methods and combining the characteristics of domestic and international traffic evaluation model,and an in-depth study has been done on two important indicators of PQI model which are PCI and SSI.According to the "road asphalt pavement maintenance technical specifications" JTJ073.2-2001-related provisions, PCI index is gained by the comprehensivedilapidation of the road surface------DR mainly,which is the surface reflection ofphysical condition and the appearance of the carrying capacity. Through investigations, the road structure can be judged on the road to the level of identification required for maintenance and improvement of the road, and choose a suitable rehabilitation measures.Pavement damage survey needs the attributes information of three areas: type of damage, grade of damage, damage amount or scope. SSI index calculated by the main road of achieving strength, the bearing capacity of the road structure is usually used to be in no condition to test-based method, the road surface of the road structure of the greatest value and the deflection deflection curve, through the analysis and judgement of the carrying capacity of the road . Deflection of the results can be used for: evaluates the asphalt pavement or the carrying capacity of remaining life; estimates the mode of the structure of the road embankment and the road surface; analysis capacity of joints or cracks in the road-Dutch;The above analysis also concerts the damaged with testing, the physical and mechanical properties test to the drilled core sample of structure.The main methods of reinforcing road design is: overlay; renovation of reconstruction. The latter generally would use the special Section due to higher costs and greater impact on traffic. There are two indicators of overlay design control in general: overlay deflection control targets and at the end of the bending stress control indicators. And another indicator to overlay a greater impact on the design: the top of the old road mode of identification, overlay design is the key to success. China's asphalt pavement design specifications of the asphalt overlay thickness of a mechanical design - experience, the various sections of deflection, to inform carrying capacity the structure of the old road, its top surface of the deflection calculated value, converted to equivalent Rebound modulus, on this basis, according to the design of new asphalt pavement surface (overlay) structure. American Asphalt Association (AI) asphalt overlay thickness design is based on the deflection of the old road to inform the results of the structural load (estimated its remaining life), the design and use of the traffic demands during the period required for determining the asphalt overlay Thickness. This item BIAXIAL symmetric load from under the flexible layered system of stress and displacement components general solution can be seen, in addition to the top of the stress and displacement effects of the relatively large load of factors, especially mechanical parameters of the material itself. Application flexibility layered system overlay design, the old road surface deflection of the calculation l₀ is more a key parameter. For the next stratum rebound modulus of inversion is carried out based l₀ mainly. Generally, under the stratum rebound modulus and calculation of deflection is inversely proportional relationship. Currently, the survey tool of road rebound deflection is Benkelman Beam (BB) in Jilin Province. In view of BB convenient and a very wide coverage in China's characteristics, the Ministry of industry standards allow the use of the BB as a road test table deflection tool. As a result it is necessary to study the BB test data for effective treatment methods, so that the final outcome can truly represent the actual path table deflection.According to Jilin Province highway asphalt pavement diseases and the use of performance of the actual situation, put forward the calculation methods on behalf of the deflection and the inversion method underlying stratum modulus of, based on flexible use of the theory of layered system overlay thickness Design of a system, and against the use of the old road survey, drilling, sampling and testing, according to survey results, layered system with flexibility in theory, identify road surface reinforced structure of different damaged circumstances . Analysis of the surface structure of the programme during the cost of road is composed of investors of the main facilities , to provide input or operators of facilities and the cost of the fees paid by users two parts. In the life cycle cost of investment infrastructure projects in major including the initial construction costs, maintenance costs, conversion costs, the residual value of the road; user fees include vehicles running costs, travel time charges, traffic accidents and transportation delays and so on.By study the asphalt road traffic evaluation methods and reinforcement design methods, we also need in the following areas to conduct a further study and exploration: development of the asphalt pavement diseases and asphalt pavement materials, construction methods, conservation methods, climate and vehicles travelling on the state of relations between the quantitative; For the specific circumstances of Jilin Province Expressway, how much relationship among a disease of asphalt pavement with surface, grass-roots, soil-based materials damaged or changes, how to effectively evaluate the traffic evaluation model in various practical collection of data accuracy, etc..