地工合成材料應用於增強道路承載力之效益評估

Bearing Capacity of Flexible Pavement System Reinforced with Geosynthetics

張宇誠(YU-CHENG ZHANG)

指導教授 ： 賴俊仁

朝陽科技大學/理工學院/營建工程系/碩士(2018年)

摘要

加勁工法在國內相關工程的應用已數十年，由於地工合成材料有較好的抗拉強度、潛變小、耐久性等優點，故經常被應用於擋土牆、邊坡、鋪面工程、垃圾掩埋場、景觀或水利與環境等工程中。目前國內有關於加勁鋪面系統的研究多著重於路基層，而關於加勁鋪面層方面之研究並不多見。
本研究利用室內加州承載比試驗進行鋪面系統地工合成材料加勁效益之評估，鋪面層使用常溫瀝青與熱拌瀝青，並探討不同的地工合成材料種類、埋設位置以及級配層厚度對上述兩種柔性鋪面系統承載力之提升效果，以供日後工程設計參考。
試驗結果顯示，應用玻璃纖維格網加勁鋪面層之中間可得到最佳的加勁效益，對於常溫瀝青鋪面可提升高達166 % (BCR=2.66)的承載力，而熱拌瀝青鋪面的承載力則可以提升57 % (BCR=1.57)。

關鍵字

鋪面系統 ； 承載力 ； 加勁 ； 地工合成材料

並列摘要

ABSTRACT
Geosynthetics have been widely used as reinforcement material in geotechnical engineering such as retaing structure, pavement subgrade, Slope engineering, landscape engineering etc. However, there has been little discussion about their application reinforced on asphalt layer.
The objective of this study is to evaluate the bearing capacity of flexible pavement system on weak subgrade reinforced with geosynthetics by laboratory California Bearing Ratio (CBR) test. The pavement system consists of both cold mix and hot mix asphalt, a aggregate layer, and a soft clay subgrade. Four geosynthetics were used as reinforcement material and were placed at four different locations. The bearing capacity of unreinforced and reinforced pavement systems were measured and compared.
Results of these tests show that the bearing capacity of the pavement system can be increased by up to 166 % for cold mix asphalt, and 57 % for the hot mix asphalt.

並列關鍵字

Geosynthetics ； Reinforced ； Pavement system ； Bearing capacity

參考文獻

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