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

A technology of resilience modulus and asphalt pavement, which is applied in the direction of applying repetitive force/pulsation force to test the strength of materials, which can solve the problem of not considering the difference in the resilience modulus of the roadbed, and achieve a reasonable effect.

Active Publication Date: 2013-08-14
ENG DETECTION & REINFORCING CO LTD OF HENAN PROVINCIAL COMM PLANNING SURVEY & DESIGN INST CO LTD
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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 d

Method used

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Embodiment Construction

[0049] Method for determining the effective modulus of resilience of asphalt pavement subgrade of the present invention, carry out according to the following steps:

[0050] 1. Determine the roadbed strength parameters in different seasons:

[0051] (1) Indoor test:

[0052] According to the data of rainfall and temperature environment conditions in different seasons in the area where the road to be built is located, soil samples for roadbed filling were obtained in the borrow pit, and according to the data of rainfall and temperature environment in different seasons, the field conditions were simulated in the laboratory, and the bearing plate method was used. Or the modulus of resilience of the soil sample measured by the strength instrument method is used as the representative value of the modulus of resilience of the subgrade;

[0053] (2) On-site measurement:

[0054] For the built road in the area where the road to be built is located, under the same or similar subgrade...

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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...

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Application Information

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IPC IPC(8): G01N3/32
Inventor 张晓炜王笑风杨博张慧鲜彭文逵
Owner ENG DETECTION & REINFORCING CO LTD OF HENAN PROVINCIAL COMM PLANNING SURVEY & DESIGN INST CO LTD
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