| dc.description.abstract | The impact of climate extremes on the world is increasing. As a result, summer temperatures are reaching new highs and daily rainfall is increasing year by year, leading to frequent droughts and floods. The main cause of climate extremes is urban development, where more roads are needed. Therefore, it is a major topic to develop road engineering so that it can not only be used for vehicles but also reduce the impact of the project on the environment. Therefore, this study aims to explore the effect of applying permeable pavement to road engineering, hoping to use the permeable pavement to achieve the benefits of resilient cities. In this study, a demonstration road of general pavement and permeable pavement was established in Dahuaba Street, Luzhu District, Taoyuan City, and monitoring instruments such as thermometers, ground thermometers, and water level gauges were buried in the site. After the construction of the back-end water cycle management system, the site monitoring data could be immediately returned and analyzed. The study mainly discussed the cooling effect of permeable pavement compared with the general pavement and the flood peak reduction effect after rainfall.
In this study, the rise and fall trend of permeable pavement and general pavement, the maximum and minimum air temperature, and the comfort level of the Central Weather Bureau were compared over 109 years. The results showed that the rise and fall of the surface temperature of permeable pavement were faster than that of general pavement, but the rise and fall of the air temperature in the permeable pavement area were slower than that of general pavement. In addition, the daily maximum and minimum air temperature of permeable pavement throughout the year is lower than that of ordinary pavement, indicating that permeable pavement can effectively regulate air temperature. Permeable pavement in summer (April to September) can be reduced by 0.57°C on average, and in winter (October to March) can be reduced by 0.94°C on average. The comfort index of permeable pavement in summer is lower than that of ordinary pavement, and the degree of heat felt by the human body is also reduced, indicating that permeable pavement can effectively reduce the urban heat island effect.
In addition, the water level measurement data of 109 years were analyzed, and the law formula of water level and flow was established. The drainage and water retention of permeable pavement and general pavement were compared, and the flood peak discharge of the two was analyzed. According to the data analysis results, it can be seen that the flood peak reduction of permeable pavement can reach 60~75% for general pavement. Indeed, low-impact development benefits can be achieved.
Finally, this study conducted affect tracking on the pavement after completion. According to the tracking results, the tracking conditions of the smoothness, PCI value, and skid resistance value during the 6 years after completion were still generally in good condition, with only part of the ground permeable. Since there were no maintenance means involved after completion, the water permeable ability dropped sharply after 3~4 years due to the decline of the pore plug. It can be seen that the permeable pavement established in this study has good results in reducing the heat island effect, usability of low-impact development benefits, pavement safety, comfort, and durability. Therefore, based on the experience of the whole life cycle of permeable pavement in this study, the relevant regulations of domestic permeable pavement are revised. It is hoped that permeable pavement can be more effectively used in road projects in the country in the future. | en_US |