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DESIGN AND CONSTRUCTION GUIDELINES FOR MSE WALLS WITH INDEPENDENT FULL-HEIGHT FACING PANELS.
| 题名： | DESIGN AND CONSTRUCTION GUIDELINES FOR MSE WALLS WITH INDEPENDENT FULL-HEIGHT FACING PANELS. |
| 作者： | Abu-Hejleh-N; McMullen-M; Hearn-G; Zornberg-J |
| 关键词： | Anchors-Structural-connectors; Concrete-; Construction-; Design-; Earth-walls; Facings-; Instrumentation-; Mechanically-stabilized-earth; Monitoring-; Panels-; Performance-; Reinforced-earth; Trenches-; Welded-wire-fabrics |
| 摘要： | In 1996, the Colorado Department of Transportation (CDOT) completed the construction of a unique mechanically stabilized earth (MSE) wall with an independent full-height facing (IFF) for the ramp connecting northbound Interstate-25 to Interstate -70 in Denver, Colorado. The new MSE/IFF wall has four major components: 1) a self-stable welded wire fabric (WWF) reinforced soil mass, 2) full-height concrete facing panels not attacked to the soil reinforcements (i.e., independent) that are allowed to tilt around their base, 3) flexible face anchors to provide for attachment of facing panels to the reinforced soil mass and accommodate movements of the wall system, and 4) a trench with flowfill to brace the panels during construction only (before the face anchors are placed). Since this MSE wall system is the first of its kind, it was considered experimental and a comprehensive instrumentation and monitoring program was performed. The main objective of this study was to upgrade the I-25/I-70 MSE/IFF wall for future standard use of this wall system by identifying modifications and additions to the design and construction of the I-25/I-70 MSE/IFF wall that would improve performance and save money and time. This report provides insight into material, construction, construction problems and corrective actions, monitoring, performance and design assessment of the I-25/I-70 MSE/IFF wall. The wall system performed as intended in the design. The flexibility of the MSE wall system smoothly accommodated the movements of the wall system, especially those induced by heavy compaction close to the facing, and allowed for the mobilization of tensile resistance in the WWF reinforcements, thus taking most of the lateral load off the facing panels. The average lateral earth pressure measured on the facing was a low value of 32 psf. After five years in service, the structure performance has been excellent with no signs of distress and the facing remained properly aligned. |
| 总页数： | 2001/05. pp (Figs., Tabs., Refs.) |
| 报告类型： | 科技报告 |
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