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碩士論文公告區 |
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| 年度： | 96 | |
| 姓名： | 黃志銘(Chih-Ming Huang) | |
| 論文題目(中)： | 以透地雷達法檢測鋪面厚度及其下方掏空狀況 | |
| 論文題目(英)： | Using Short-Pulse Ground Penetration Rader to Investigate the Pavement Thickness and Void in Substrate | |
| 摘要(中)： | ||
| 鋪面以性能及製作材料可分為剛性鋪面及柔性鋪面兩種，柔性鋪面為瀝青混凝土材料製作，剛性路面為混凝土材料製作而成，鋪面受到長年累月的外力作用下，會於下方產生掏空狀況。本研究探討不同透地雷達天線頻率檢測剛性鋪面以及柔性鋪面不同掏空狀況之適用性。本研究製作兩塊不同材質的鋪面試體，一為大小660cm×220cm的瀝青鋪面試體(採二次滾壓)；另一為同尺寸大小的純混凝土試體。 研究結果顯示，瀝青混凝土鋪面厚度較混凝土鋪面厚度更易辨識，掏空狀況下，瀝青鋪面下方的預埋缺陷都有明顯反應利於辨識，而掏空含水狀況下，由於水使得電磁波速變慢，由壓克力箱底部反射的訊號延遲，並造成圖像中瀝青底部與水的介面層會有不清楚的狀況產生；混凝土鋪面1000MHz天線之底層反射反應無法清楚的由影像剖面圖看出，代表在到達混凝土下方掏空缺陷位置時，其能量已經消散而不足以穿透；而500MHz天線之結果，其不論是掏空或掏空含水皆可以看出各掏空缺陷位置。 |
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| 摘要(英)： | ||
| There are two kinds of materials frequently used in pavement, which are asphalt and concrete. When pavement carries load, void may be generated in substrate. The purpose of this study is using different ground penetration radar frequencies to investigate the thickness of asphalt and concrete pavements and voids in substrate. Pavement models with two different materials, sized 660cm * 220cm are constructed. Ground penetration radars with 1000 MHz and 500 MHz are used to investigate void and void with water in substrate. For case with void in substrate, void can be recognized better for AC pavement rather than PC pavement. For void containing water, the reflecting signals from the bottom of the void are delayed because the electromagnetic wave speed is slower in water, and image of the interface between asphalt and voids becomes unclear. In concrete pavement, no voids can be found using 1000 MHz antenna, but can be found using 500 MHz antenna no matter voids containing water or not. |
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| 檔案： | 沒有相關檔案 | |
| 相關連結： | http://ethesys.lib.cyut.edu.tw/ETD-db/ETD-search-c/view_etd?URN=etd-0826108-170403 | |