https://scholars.lib.ntu.edu.tw/handle/123456789/170567
標題: | 鋪面績效整合與孔蓋平坦度特徵之研究 The Study of Integrated Pavement Performance and the Charasterics of Manhole Profile |
作者: | 葛孝萱 Ko, Hsiao-Hsuan |
關鍵字: | 鋪面自動化檢測;鋪面破壞;統一裂縫指標;養護優先排序;人(手)孔;國際糙度指標;Automated pavement distress survey;Pavement distress;Unified Crack Index(UCI);Pavement maintenance prioritization;manhole;International Roughness Index (IRI) | 公開日期: | 2009 | 摘要: | 道路鋪面維護管理系統中,鋪面現況績效之評估為首要工作,一般採用鋪面績效指標進行評估,其量化之鋪面狀況數值可提供鋪面工程師簡易而快速地判斷鋪面狀況程度,以進行道路養護候選路段。一般而言,市區道路之養護主要以平坦度指標及表面損壞指標進行優先排序,而國內目前養護路段優先排序以及道路養護工法選擇,即為根據國際糙度指標(International Roughness Index, IRI)與鋪面狀況指標(Pavement Condition Index, PCI)所共同決定的;其中IRI指標自數年前即於國內進行推廣,其自動化檢測之方式大幅地降低傳統使用三米直規進行平坦度量測之作業;而PCI指標則仍需以人工方式進行目視檢測,檢測效率有限,無法定期、大規模地進行檢測,不易確實應用於道路養護優先排序,同時對於各養護單位而言亦為人力及財政之一大負擔,因此若能以自動化之鋪面損壞檢測設備取代人工目視調查作業,將可減輕各養護單位之重擔並提升各地之道路品質。一方面,道路平坦度驗收過程中,孔蓋及路口處之排除與否一直為道路施工時業主與承包商間爭議所在,然未有一微觀或量化之資料數據供予業主及包商進行討論;此外,一般用路人多認為孔蓋為道路不平坦之主因,期藉由修正孔蓋處所帶來之不舒適感(如孔蓋下地)以提升整體道路之平坦度。有鑑於上述原因,若能利用自動化檢測設備之輔助,以模擬方式探討孔蓋對道路平坦度之影響,並進一步將其特徵化以應用於道路驗收,相信將有助於道路品質之提升。研究透過實驗設計過程,同步收集自動化鋪面損壞檢測系統影像與鋪面高程資料,並加以分析。依據分析結果分佈狀況可發現應用UCI指標(AUCI)與 IRI兩指標間無對等關係存在,若單以IRI或AUCI做為道路養護排序之依據,將無法確實地篩選出路網中應該善之路段,因此務必以整合指標方式將兩種指標併同考量,方可確實地反映各路段之鋪面狀況。因此,本研究依據檢測路段分析結果分佈狀況擬定路網層級之養護優先排序模式與專案層級之建議養護工法。一方面,於孔蓋對道路平坦度影響量化部分,本研究首先透過同步收集之鋪面影像與高程資料確認出孔蓋之位置後,建立孔蓋平坦度之特徵,以50個孔蓋樣本進行門檻值之建立,並以27個孔蓋樣本進行驗證,其正確率與辨識率可達78%與85%;接續本研究以模擬平順方式探討孔蓋對平坦度之影響性,發現於多數情形下孔蓋造成之IRI差值(ΔIRI)均小於0.2 m/km,影響幅度並不大;最後,進一步應用建立出之特徵針對使用中道路進行分析,發現使用中道路無孔蓋之街廓占總分析街廓之39%,即逾60%之街廓中皆有孔蓋設置,約91%之街廓平均每一百公尺之孔蓋數量小於2個;而根據分析結果,孔蓋數量與平坦度IRI值並無顯著之比例關係,顯示孔蓋應非道路平坦度不佳之主因。 Present pavement performance evaluation is one the most important compositions in pavement maintenance system; the quantified pavement condition provide pavement engineers to prioritize the maintenance roads. avement maintenance prioritization is mainly based on roughness index and pavement distress index in many countries. In Taiwan, road authorities adopt International Roughness Index (IRI) and pavement condition index (PCI) to evaluate pavement condition, prioritize the maintenance roads, and select the suggested maintenance/rehabilitation activities. High-speed profiler and roughness index IRI has been popularized for years; the high-speed property diminishes the difficulty of collecting pavement data. However, PCI is conducted by manual survey, which is very costly, time-consuming, and labor-intensive, so it is almost impossible to apply it on a large scale roadway network periodically. Therefore, the complete PCI data of city streets in Taiwan are still not available, and due to the lack of pavement performance data, pavement maintenance prioritization cannot be executed completely and effectively. Hence, the automated pavement distress survey system is essential.n the other hand, when testing and accepting newly constructed roads, the inclusion or exclusion of manhole areas has always been a dispute between proprietors and contractors, hence, locating and removing manhole areas in a continuous profile survey need to be identified. ence, this study investigated 570 lane-km pavement conditions in city streets with high-speed profiler and automated pavement distress survey system synchronously. Following the results, the present pavement conditions are analyzed and presented; the pavement maintenance prioritization for network level is also suggested.esides, this study utilized 50 manhole samples to find the characteristics of manhole profiles and another 27 manhole samples to verify. The “accuracy” and the “recognized percentage” of the ascertained characteristics are relatively reliable with values of 85.2% and 77.8%, respectively. By using the established characteristics to locate manhole areas and simulating the elevation, the exclusion of manhole areas can be executed automatically. Then this study also proposed to revise the elevation of manhole areas, by simulating the smoothest pavement condition, and quantifying the influence on the road roughness; the analysis shows that the influence of manhole areas on road roughness is not significant. However, to ensure the equity of road acceptance, it is appropriate to simulate the smoothest pavement condition in manhole areas when testing and accepting newly constructed roads. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/187781 |
顯示於: | 土木工程學系 |
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ntu-98-R96521512-1.pdf | 23.32 kB | Adobe PDF | 檢視/開啟 |
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