A method for judging the maintenance timing of drainage asphalt pavement

Abstract

The invention discloses a method for judging maintenance time of a drainage asphalt pavement. The method for judging the maintenance time of the drainage asphalt pavement comprises the following steps that S10, a non-nuclear density gauge is calibrated; S20, the maintenance time of the to-be-measured drainage asphalt pavement is judged. The step S10 particularly includes the sub-steps that the density, water permeability coefficient and bulk volume density of core samples of marking points on a testing road are measured; a first curve adopts the actual density and the bulk volume density as a horizontal ordinate and a vertical ordinate and adopts the bulk volume density of the core samples as a target value; the actual density is corrected and the corrected density is inputted into the non-nuclear density gauge; a second curve adopts the corrected density and the water permeability coefficient as a horizontal ordinate and a vertical ordinate; and the corrected density corresponding to the preset water permeability coefficient on the second curve is set as a judgment value. The step S20 particularly includes the sub-steps that density of fixed monitoring points on the to-be-measured pavement is measured; the percentage of the number of the fixed monitoring points, with the density being greater than the judgment value, accounting for total quantity is counted; whether the percentage is greater than the preset percentage or not is judged; if yes, maintenance is carried out; and if not, maintenance is not carried out. The method for judging the maintenance time of the drainage asphalt pavement is simple in operation, short in detection time and low in traffic effect.

Description

technical field [0001] The invention relates to the technical field of pavement maintenance methods, in particular to a method for judging the timing of drainage asphalt pavement maintenance. Background technique [0002] Drainage asphalt pavement is a type of pavement paved with discontinuously graded high-viscosity asphalt mixture with a porosity as high as 18% to 25%. This kind of pavement has multiple functions of large gap, safety, noise reduction and mitigation of urban heat island effect. It meets the needs of current urban construction for high-grade pavement pavement and is favored by the industry. This kind of pavement will play an important role in the construction of sponge cities . [0003] With the large-scale application of drainage asphalt pavement, its supporting maintenance is also becoming more and more perfect. At present, the maintenance method for this type of road surface is mainly to use professional drainage maintenance vehicles for regular cleanin...

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Problems solved by technology

[0004] However, this detection method has the following disadvantages: ①The detection process generally requires the use of putty or plasticine or silica gel materials as sealing materials. Frequently, it will cause more serious road surface pollution; ②The requirements for the level of operators are high, and the inspection personnel are prone to make mistakes, resulting in inaccurate detection, which is not conducive to accurate monitoring of the water seepage function of the road surface; ③The water seepage coefficient of drainage asphalt pavement is generally 900ml / 15s Above, some even as high as 1500ml / 15s, while the bottom water outlet of the pavement water seepage meter commonly used in the market is only 7mm in diameter, which cannot meet the test requirements of a higher water seepage coefficient, and the pavement water seepage meter manufacturer needs to carry out special transformation. However, at present There is no unified basis for the transformation, which will lead to inaccurate test results; ④The detection position is highly variable, and because the detection process will cause pollution, the same position can only be detected once, and repeated detection cannot be performed, which is not conducive to Accurately assess the water seepage capacity of the road surface; ⑤ It takes a long time to close the traffic for a long time, which has a great impact on road traffic and requires high manpower and material costs

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