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LABORATORY EVALUATION OF GEOSYNTHETIC-REINFORCED PAVEMENT SECTIONS.
| 题名： | LABORATORY EVALUATION OF GEOSYNTHETIC-REINFORCED PAVEMENT SECTIONS. |
| 作者： | Al-Qadi-IL; Brandon-TL; Valentine-RJ; Lacina-BA; Smith-TE |
| 关键词： | LABORATORY-TESTS; PAVEMENT-PERFORMANCE; PERFORMANCE-EVALUATIONS; GEOTEXTILES-; GEOGRIDS-; SECONDARY-ROADS; LOADING-TESTS; DISPLACEMENT-; PAVEMENT-DEFLECTION; GEOSYNTHETICS-; REINFORCEMENT-; REINFORCING-MECHANISMS |
| 摘要： | Preliminary experimental and analytical investigations were conducted to evaluate the performance of pavements with and without geotextile or geogrid reinforcement materials. Four pavement sections were tested: one unreinforced section that served as a control and three sections reinforced with either one of two geotextiles or a geogrid. The pavement sections were constructed to model a typical secondary road in Virginia built over a weak granular (silty sand) subgrade material. Loading of the pavement sections was accomplished through the use of a computer-controlled pneumatic system that delivered approximately 55 kPa through a 30-cm rigid plate at a frequency of 0.5 Hz. The resulting displacement of the pavement surface was monitored by an array of linear variable displacement transformers. The performance of each pavement section was evaluated as a function of the applied number of cycles, the resulting surface deflection profile, and the layer deflection profile. It was concluded that geosynthetics can substantially improve the performance of a pavement section constructed on a subgrade soil with a low California bearing ratio. Also the reinforcing mechanisms of geogrids and geotextiles are different. |
| 总页数： | Transportation Research Record. 1994. (1439) pp25-31 (7 Fig., 6 Tab., 19 Ref.) |
| 报告类型： | 科技报告 |
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