落錘式撓度儀 (Falling Weight Deflectometer, FWD)廣泛應用於鋪面非破壞性檢測，評估鋪面結構狀況與承載力，作為鋪面維修或養護管理之參考。本研究分為兩個部分，第一部分使用歷史數據之撓度值，資料來源為高速公路局中區工程處，路段為苗栗段，由於撓度值於不同溫度量測，需進行溫度校正，再使用5種方法分析數據，分別為正規化撓度值D0、衝擊勁度模數ISM值、路基回彈模數Mr值、撓度面積Area值、撓度曲線參數。第二部分使用現地撓度數據，於岡山段選擇鋪面狀況良好及需改善之路段檢測，與第一部分不同之處為現地能測得實際大氣溫度、鋪面溫度以及各鋪面層溫度，進行校正時將更具準確性，亦使用5種方法分析數據，建立完整鋪面狀況評估模式。此5種方法中，正規化撓度值D0可比較鋪面狀況，若實際厚度、鋪面結構和施工品質確定，此方法可作為評估鋪面參考。衝擊勁度模數ISM值受D0值影響，判讀能力與正規化撓度值D0相似。路基回彈模數Mr值使用一感測器之撓度值D2100判讀，大致可判斷路基好壞。撓度面積Area值反應感測器之撓度值，代表性完整，變異性小，但需搭配撓度曲線整體分析及正規化撓度值D0，方能清楚分析。撓度曲線參數使用原始數據分析，經溫度校正後，直接了解各層狀況，可作為初步評估鋪面狀況依據。

The falling weight deflectometer (FWD) has been used extensively of nondestructive testing (NDT) to support pavement design, rehabilitation strategy selection, overall bearing capacity, and other pavement management activities. These data are used to determine the load-response properties of the pavement structure and subgrade. This study consists of 2 parts: (1) Investigating the 1st National Freeway Miaoli section three years FWD data collected by Central Area National Freeway Bureau. However, the tests were conducted during different seasons. To get comparable results, the measured deflections have to be corrected to a reference temperature. Compare and analysis the data with the following 5 methods: normalized D0 deflection, impulse stiffness modulus (ISM), AASHTO Mr equation, Area method, and Deflection Bowl Parameter method. (2) Investigating the Gang Shan district in situ testing FWD data. Different from part 1, temperatures are measured complete and accurate on surface temperature and in-depth temperature of pavement structures. More data on other thicknesses are being collected. Material types and layer thicknesses can be measured by using field cores. Evaluating the pavement structural capacity with the above 5 methods.

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