Override The Standard Grass-roots Equivalent Modulus Of Elasticity

Vehicle being over-load is one of main factor that result in the early stage damage of road in China, the research on it is not a few, but the accurate definition of heavy-load standard that guides pavement design is few. The paper is based on innumerable practical heavy-load road data, deliberate heavy-load standard in detail through theoretical arithmetic, and bring heavy-load standard about cement concrete pavement and asphalt concrete pavement separately; In the meantime, through a large quantity of cement concrete pavement stress calculation, the paper puts forward relation expression between load on concrete board and stress level under board; Meanwhile, the paper puts forward traffic classification about cement concrete pavement and asphalt concrete pavement; Through bearing board testing on each structure sheaf the paper finds the material modulus gets modified; Through comparing position equivalent rebound modulus to theoretical equivalent rebound modulus, the paper points out limitation of nomograph in course of cement concrete pavement design, whereby, puts forward modifier formulas about theoretical equivalent modulus.