近年來台灣地區暴雨頻率及雨量均大幅增加。為減少地表逕流、降低排水系統負荷，工程界積極推動透水性鋪面研究，期能解決上述問題。 但因為鋪面浸水可能造成材料強度衰減，進而影響其結構性，因此透水性鋪面在國內多使用於廣場、人行道、停車場等低交通量地區，無法廣泛應用在一般市區道路。 本研究收集國外透水性鋪面設計流程與方法後，以日本透水鋪面設計方法為主軸，考慮台灣氣候、環境因素進行透水性鋪面設計，並與國內慣用之AI設計法和AASHTO設計法設計之鋪面厚度相較，探討各層鋪面材料浸水強度衰減率，再模擬各種不同浸水情況以KENLAYER進行力學分析，比較其應變量和換算使用年限之差異。 設計結果發現，在10年累計交通量ESAL = 105，降雨強度 72.94 mm/hr情況下，為達成計畫雨水處理量的透水功能設計厚度(以Tp代表)，大於單純結構考量設計(以Ts代表)鋪面厚度。 進一步分析發現，Ts完全未折減時使用年限為12.9年，恰好滿足設計年限10年條件。而透水功能設計厚度Tp因厚度較大，即使完全浸水狀態下換算年限仍有62.5年。表示透水功能設計結果過於保守。 在結構設計過程中發現同樣交通量條件下，日本TA經驗法、AI法和AASHTO設計法設計之厚度差異不大，因此國內設計流程可考慮直接以傳統設計法和日本透水功能設計法分別進行設計，再取厚度較大者。但日本透水功能設計之透水指標若套用在台灣降雨強度上，可能會過於保守，因此建議後續研究可探討此透水性指標對於台灣氣候環境之適用性。 When we collected other country’s permeable pavement design processes and methods, our research decided to follow the Japan’s system. In this system, our design process permeable pavement considered about Taiwan's climate and environmental factors. And then we compared with AI and AASHTO design methods which was famous in Taiwan. By exploring the layers of pavement materials flooding intensity decay rate, and simulating various cases of flooding in KENLAYER mechanical analysis, We could compare the response variable and the useful life of the translation differences. In our result showed that the permeable pavement functional design thickness of rainfall treatment (with Tp represents ) is lager than pavement thickness of only concern about structural considerations (with Ts represents ). When we did more further analysis. When we did more further analysis, it revealed that Ts could be used 12.9 years only in unflooded situation. It was just to meet the design life of 10 years conditions. But the permeable functional design thickness Tp was more depth than the condition, they could use in next 62.5 years even in fully flooded situation. The results indicate permeable functional design was too conservative. If we used Japan permeable functional design in rainfall intensity in Taiwan, it might be too conservative. We has recommended that future research could explore this permeable indicator for the suitability of climate and environment in Taiwan.
