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Instrumentation and Performance of Geosynthetics Beneath Flexible Pavements in Winterport and Frankfort, Maine; Final research rept
| 题名： | Instrumentation and Performance of Geosynthetics Beneath Flexible Pavements in Winterport and Frankfort, Maine; Final research rept |
| 作者： | Fetten, C. P.; Humphrey, D. N. |
| 关键词： | Roadbed subsurface drainage; Reinforcing materials; Mechanical properties; Geotextiles; Geotechnical fabrics; Soils; Performance evaluation; Frost; Ice; Penetration; Separation; Soil water movement; Strain rate; Loads(Forces); Roadbed base courses; Geotechnical engineering |
| 摘要： | The objective of this study was to evaluate the effectiveness of geosynthetics in terms of reinforcement, separation, and drainage for roadways constructed in cold regions where the aggregate base course is thickner than investigated in previous studies. This project goes beyond previous work by evaluating the effectiveness of geosynthetics as a reinforcement, separation, and drainage layers in paved roadway sections with subbases ranging from 580 to 640 mm thick (23 to 25 in.). The study was performed on a 3.0 km (1.9 mile) portion of U.S. Route 1A in the towns of Frankfort and Winterport, Maine. The project evaluated four different geosynthetics: reinforcement geogrid, high strength geotextile; heavy weight nonwoven geotextile, and drainage geocomposite. The project was instrumented to monitor the performance of the geosynthetics. Overall the force in the geogrid and high strength geotextile was only a small fraction of the ultimate strengths of the materials. Piezometer readings showed that a drainage geocomposite placed 450 mm (18 in.) below subgrade may have been effective in reducing pore water pressures. Falling weight deflectometer results were inconclusive in evaluating the effects of the geosynthetics. |
| 总页数： | 164p |
| 报告类型： | 科技报告 |
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