NDLI: Field performance of a 17 m-high reinforced soil retaining wall.

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Field performance of a 17 m-high reinforced soil retaining wall.

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Abstract	ABSTRACT: A 17 m-high steel strip reinforced soil retaining wall was instrumented to compare field measurements with predictions given by the design guidelines of the Amer-ican Association of State Highway and Transportation Officials (AASHTO) 1996 Stan-dard Specifications and the AASHTO 1999 Interim Revisions. The AASHTO models were conservative with respect to external lateral earth pressures and lateral earth pres-sures on the facing panels. On average, the AASHTO 1996 and 1999 models overesti-mated lateral pressure at the facing by 94 and 142%, respectively. Measured values of foundation bearing stress were generally in good agreement with values calculated using soil unit weight and depth, except that the average force from the facing panels on the lev-eling pad was twice that of the weight of the panels themselves. This discrepancy is attrib-uted to shear stress on the back of the facing panels and vertical loads transferred to the panels through the strip connection clips. The location of the zone of maximum strip ten-sion was in good agreement with the assumed failure surface. On average, the AASHTO 1996 and 1999 models underestimated maximum strip tensions by 17 and 8 % and over-estimated strip connection tensions by 127 and 154%, respectively. Finally, the apparent
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Subject Keyword	M-high Reinforced Soil Retaining Wall Facing Panel Field Performance Good Agreement Soil Unit Weight Lev-eling Pad Maximum Strip Tension State Highway Assumed Failure Surface Design Guideline Strip Connection Clip Average Force Interim Revision External Lateral Earth Pressure Vertical Load Maximum Strip Ten-sion Field Measurement Foundation Bearing Stress Over-estimated Strip Connection Tension Aashto Model Stan-dard Specification M-high Steel Strip Lateral Earth Pres-sures Model Overesti-mated Lateral Pressure Measured Value Amer-ican Association Transportation Official
Content Type	Text
Resource Type	Article

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