Permeable asphalt pavement drainage device for transverse flat slope and gentle slope road sections

Abstract

The invention discloses a permeable asphalt pavement drainage device for transverse flat slope and gentle slope road sections, which comprises channel steel arranged in a permeable asphalt pavement surface layer of the transverse flat slope and gentle slope road sections and a cover plate provided with an opening, the opening of the channel steel is upward, and the cover plate is arranged on the opening of the channel steel. The channel steel extends in the transverse direction of the road surface and is arranged side by side in the length direction of the road surface, the bottom faces of the channel steel incline towards the side edge of the road to form inclined drainage channels, lower end openings of the drainage channels are drainage openings, and the drainage openings are communicated with drainage facilities on the side edge of the road. The multiple drainage devices are arranged in the permeable asphalt pavement layer at certain intervals, new drainage channels are added, the permeability of the drainage asphalt pavement is improved, permeated rainwater can be drained in an accelerated mode, on the premise that the transverse slope (j%) of the pavement is not changed, the transverse slope (i%) of the channel steel is adjusted, the drainage transverse slope in the pavement is enlarged, and the drainage effect of the pavement is improved. Rainwater can be rapidly drained into drainage facilities on the two sides of a road through a large cross slope.

Description

technical field [0001] The invention relates to a permeable asphalt pavement drainage device for horizontally flat slope and gentle slope sections. Background technique [0002] For the commonly used dense-graded asphalt concrete pavement, the drainage method is mainly to set up a cross slope through the pavement to guide the pavement water to drain to the drainage facilities outside the subgrade. On the other hand, due to the large void structure of asphalt permeable pavement, the surface water can quickly penetrate into the drainage pavement structure layer in rainy days, and after a short period of accumulation, it can be discharged laterally to both sides of the road through the connected voids. [0003] Permeable asphalt pavement has the following advantages: [0004] Water permeability: The permeable surface layer has the function of infiltration and storage of rainwater, which can reduce the runoff length of the road surface and ease the peak runoff. At the same time...

AI Technical Summary

Problems solved by technology

Blockage has become the most important problem affecting drainage asphalt pavement, and blockage will also cause a series of diseases such as reduced water permeability, loss of drainage performance, reduced durability, shortened life, loose surface aggregates, scattering, and reduced anti-skid performance

[0008] In addition, permeable asphalt pavements often have insufficient drainage capacity on flat (gentle slope) road sections

One is the two-way eight-lane or more ultra-wide highway. Due to the wide road width and the long pavement drainage path, the thickness of the road surface water film is relatively large; the second is the ultra-high road section with a slow gradient rate, especially when the plane is S-shaped. In the superelevation 0% area, it is inevitable that the minimum composite slope is less than 0.5%, and there is no room for adjustment of the cross slope of the road under the requirements of the highway superelevation gradient rate.

The conventional solution is to adjust the longitudinal section and add pavement, which not only greatly increases the project cost, but also has no obvious improvement effect

Images