Determination method for effective resilience moduli of bituminous pavement and bituminous roadbed

Abstract

The invention discloses a determination method for effective resilience moduli of a bituminous pavement and a bituminous roadbed. The method comprises the following steps that: I, roadbed strength parameters in different seasons are determined; II, a relation between each roadbed resilience moduli in different seasons and a corresponding influence degree of the roadbed resilience moduli on the carrying capacity of the roadbed is established; and III, the effective resilience modulus of the roadbed variable in the different seasons is determined. Based on the effective resilience modulus of the roadbed with flexure, an influence of different water contents of the roadbed in the different seasons on the roadbed and pavement design flexure can be considered, and a rule of seasonal variation of the roadbed strength can be accurately reflected, so that the determination of design parameters of the roadbed is reasonable, and a bituminous pavement structure design and a roadbed and pavement waterproof and drainage design can be guided well. According to a mutual influence relation of the roadbed and the pavement, the influence degree of the roadbed resilience moduli in the different seasons on the pavement design flexure can be determined, so that the effective resilience modulus of the roadbed can be determined.

Description

technical field [0001] The invention relates to the field of traffic and transportation engineering, in particular to a method for determining the effective modulus of resilience of an asphalt pavement subgrade. Background technique [0002] The subgrade rebound modulus is an important design parameter in the design of asphalt pavement structure, which directly affects the design result of pavement structure. Since the subgrade has not yet been built when the road is designed, it is difficult to obtain accurate parameters of the modulus of resilience of the subgrade. For this reason, my country's current "Code for Design of Highway Asphalt Pavement" (JTG D50-2006) recommends using empirical methods such as table look-up method, indoor test method, conversion method, and field measurement and investigation method to determine the subgrade rebound modulus. [0003] Since the subgrade is in direct contact with the surrounding natural environment during its service, the modulus...

AI Technical Summary

Problems solved by technology

However, in the method for determining the modulus of resilience of the subgrade recommended by the current design code, uniform standard conditions are used to determine the modulus of resilience of the subgrade, and the difference in the actual modulus of resilience of the subgrade in different seasons is not considered.