ABSTRACT
In recent years, the problem of city waterlogging is increasing with the constant
expansion of the scale of urban construction and the speed of urbanization continues to
accelerate, the construction of the sponge city has received great attention in the world.
There are more and more domestic and abroad research on permeable pavement, but it
still lacks a wide range of practical applications. This requires us to strengthen the
construction of the sponge city and the study of a new sponge road, so as to reduce the
loss caused by urban flooding. This paper analyzes the domestic and abroad research and
application on porous pavement, and puts forward the sponge road under the concept of
sponge city should combine with new type permeable pavement, design a reasonable
drainage structure.
DOMESTIC RESEARCH OVERVIEW
- In our country, the time of permeable pavement research is not long, the theoretical and practical experience is relatively short. But in recent years, many provinces and cities in the heavy rain area suffered from flood disaster, which threatened people's daily life and the safety of life and property seriously. This situation has received great attention from the relevant departments of the state. The construction of the sponge city is significant and meaningful, and the exploration of the sponge road is also developing rapidly. In the 70s of the 20th century, a large number of ancient villages and ancient buildings have been destroyed.
- Therefore, Beijing Gardens Bureau studied a kind of brick with water permeability and air permeability characteristics, laying in the Royal Garden of the open square and on the road. In 2004, Beijing made five different districts into stormwater and flood control and utilization demonstration area, collected rainwater from the square, the road, the courtyard through the method of paving the permeable pavement, used for greening irrigation household toilets and roads and residential areas.
- In 2005, Shenyang used jade, marble and other natural materials paved permeable pavement in the Expo Park main entrance plaza and environment-friendly park and it has 219 a good effective. The application of permeable materials has been widely studied in China, but there is little research on the drainage system.
- In 2006, a test road with permeable material was built in a whole sections of Guangzhou, designed and adopted a more systematic drainage structure. Part of the rainwater collected through a comprehensive drainage system and used for road surface water and green irrigation. The wide application of permeable pavement is in the first phase of the Shanghai New International Expo Center in 2010, mainly used in the square and nonmotorized vehicles. In January 2016, the first parking lot pavement of Wuhan sponge concrete pavement was tested, the rainfall was adjusted by the rainstorm model, water was infiltrated into the pores of the sponge road surface, and drained through the water storage well and the drain pipe, 10 minutes later the surface of the sponge road was dry quickly, the rate of water permeability is higher than the national standard 20%.
- In 2004, in order to alleviate the urban waterlogging and heat island effect, Liang Huo carried out experimental study on the material of the system of the permeable concrete pavement with the theory method by filling package. He put forward reasonable pavement bearing strength through the design of the pressure mould to the concrete structure strength test. He also simulated the natural environment in sunlight and ventilation conditions, analyzed the situation of heat dissipation and water seepage of permeable concrete pavement, and compared the porosity of various materials, obtained the relationship equation which can be used to evaluate the pavement noise reduction capability. Yan-Bin Guan had an experimental and theoretical research on the porous asphalt pavement based on the permeability mechanism and structure design in 2008. He established the mathematical model and network model of rainwater infiltration process, thought the maximum particle size of aggregate through asphalt mixture. Combined the expression of effective porosity, the seepage quantity and structure design parameters of porous asphalt pavement were calculated, and a new type of section structure was designed. The reference model is provided for reducing the water accumulation in the urban road surface. In 2015 Bao-Xing Qiu said that the goal of the sponge city is to allow the city to adapt the changes of the environment and natural disasters.
0 Comments