Method for determining straight shearing strength admissible value of bridge deck pavement bituminous mixture

Abstract

The invention discloses a method for determining a straight shearing strength admissible value of a bridge deck pavement bituminous mixture. The method comprises the following steps of: 1, calculating shearing strength of a bridge deck pavement layer; 2, determining shearing strength and a shearing strength allocation proportion of each bituminous mixture pavement layer; 3, determining temperature of each bituminous mixture pavement layer; 4, setting accumulated standard axle load frequency and running speed in each month; 5, calculating an allowable rutting depth of each bituminous mixture pavement layer; 6, determining the direct shearing strength admissible value of the bituminous mixture adopted by each bituminous mixture pavement layer; and 7, outputting the result. The method is simple in steps, reasonable in design, low in investment cost, simple and convenient to use and operate and good in using effect, and the defect that the influence of the traffic volume, running speed, air temperature and mechanical response on the rutting cannot be reflected in the existing method for determining the shearing strength admissible value of the bituminous mixture can be effectively overcome.

Description

technical field [0001] The invention relates to the technical field of bridge deck asphalt mixture pavement, in particular to a method for determining the direct shear strength allowable value of bridge deck pavement asphalt mixture. Background technique [0002] In recent years, my country's highway and bridge construction has developed rapidly, bridge structures have been continuously innovated, and long-span bridges have continued to emerge. Due to harsh service conditions and design defects, coupled with excessive traffic volume and severe overloading, the instability rutting caused by shear deformation is the main disease of the bridge deck asphalt pavement, which is caused by the shear stress of the structural layer exceeding the mixed caused by the shear strength of the material. Therefore, the shear strength of the asphalt mixture for bridge deck paving should be greater than the allowable value to ensure that the rutting depth of the pavement is still less than the...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for determining the allowable value of the direct shear strength of asphalt mixture for bridge deck pavement in view of the deficiencies in the prior art above. The method has simple steps, reasonable design, low input cost and uses It is easy to operate and effective in use, and can effectively solve the defects that existing methods for determining the allowable value of shear strength of asphalt mixture cannot reflect the influence of traffic volume, driving speed, air temperature and mechanical response on rutting

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