道路桥梁路基路面论文

Road drainage design features

Abstract: With China's rapid economic and social development, road construction has entered a rapid development period. However, increasing traffic and load cases, the use of traditional materials and construction techniques into the road pavement in use revealed many problems, especially in the southern rain-fed areas, roads, water and surface water damage to the phenomenon of performance was very prominent. This has become so foreign road construction of a major difficulty. Therefore, the conventional asphalt concrete pavement in both the design and construction process needs to be improved on. The porous asphalt concrete pavement is adapted to the needs and developed a new type of pavement structure, is particularly suitable for wet areas. This paper briefly studied.

Keywords:porous asphalt concrete, pavement, mix design, construction techniques, quality control

1 Background

With China's rapid economic and social progress, and infrastructure are also at an unprecedented pace, highway construction is the construction of infrastructure facilities one of the key. As of the end of 2005, highway mileage has more than 41,000 km. Although with the new materials and construction process optimization, continuous improvement of the quality of asphalt pavement, but there is still a considerable part of the asphalt concrete pavement in the process of using a certain degree of damage occurring phenomenon, especially because of a combination of factors caused the early ( with 3 years or so) damage, resulting in the use of asphalt pavement performance and life often achieve their design level, has a serious impact on road transport normal functioning, causing huge economic losses, but also to some extent hampered the development of highway. Past road damage in the form mainly as rutting, low temperature cracking and fatigue cracking, while the use of a semi-rigid pavement structure and the quality of the asphalt mixture has been effectively mitigated. But the damage in the form of water damage is replaced, a troubled company developed a new issue of highway. Especially in the rainy areas in southern China, the highway in the spring melt season, the rainy season and the rainy season, the road will appear Ma surface, loose, and even out the grain pits, this dramatic early destruction, is that people anticipated.

2 of water damage

Water damage to asphalt pavement problems, the first thing comes to highway drainage system. In order to ensure the stability of roadbed, good road safety performance and driving, highway drainage facilities are set up well to rule out road sector within the scope of surface water and groundwater. Highway drainage from the road sector, the general surface drainage, surface drainage and underground drainage within three parts. Road surface drainage sector, including road surface drainage, drainage and slope the median drainage. Within the porous pavement surface drainage, including drainage,