Road structure of urban intersection, bus station and bus lane

Abstract

The invention discloses a road structure of an urban intersection, a bus station and a bus lane. The road structure comprises a surface layer, a middle surface layer, a lower surface layer, a base layer and a sub-base layer from top to bottom, a rubber asphalt stress absorption layer is arranged between the lower surface layer and the base layer, and the surface layer is composed of a semi-flexible material SFA13 sprayed with a stone exposing agent of 4-6 cm; the middle surface layer is formed by a semi-flexible material SFA16 doped with a phase change energy storage material of 6-8cm; the lower surface layer is made of an EME20 high-modulus asphalt mixture of which the thickness is 8-10cm; the base layer is composed of C-B-1 cement stabilized graded broken stones or gravels doped with bagasse fibers, waste rubber powder and water-absorbent resin sodium polyacrylate of 18-20cm, and the subbase layer is composed of 15-18cm fabricated regular hexagonal prism-shaped porous cement concrete. By integrating and optimizing the pavement structure, the water stability, the crack resistance and the durability of the road structure are improved, the rut resistance, the skid resistance and thefatigue resistance of the pavement are improved, the urban heat island effect is relieved to a certain extent, and the recycling of wastes is realized.

Description

technical field [0001] The invention belongs to the technical field of road engineering, and in particular relates to road structures of urban intersections, bus stations and bus lanes. Background technique [0002] Road intersections are mostly the main areas for vehicles to start, stop, and brake. Vehicles are heavily channelized. Under the influence of various factors, traditional asphalt pavement is prone to congestion, rutting, and waves. Although the bus station only occupies a small section of the road, as an important part of the normal operation of urban traffic, the lateral force of the bus turning when entering or leaving the station, the friction resistance when parking, the friction when starting, etc., asphalt The pavement is very prone to rutting disease. At the same time, the dedicated bus lanes are fully channelized lanes, which require high temperature and deformation resistance of pavement materials. Ordinary asphalt pavement structures are prone to early...

AI Technical Summary

Problems solved by technology

[0004] Due to the poor crack resistance and insufficient durability of cement-stabilized crushed stone or gravel, it is easy to cause problems such as cracking of the base and reflective cracks on the road surface.

In view of the rutting disease of special sections of urban roads, the current pavement structure scheme with semi-flexible pavement as the surface layer has achieved certain results, but due to the performance of cement-based grouting materials and construction techniques, the structural depth of the surface layer of the semi-flexible pavement is small. , the anti-skid performance is poor, part of the grout attached to the surface of the aggregate is easy to fall off after hardening

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