GEOGRID GEOMETRY AND STABILITY OF CONCRETE BLOCK RETAINING WALLS
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Volume Title: ICASGE2023
DOI: ICASGE-GEO
Authors
Abstract
Concrete block Earth Retaining walls reinforced by geogrid defined also as Segmental retaining earth walls (SRW) have the advantage of flexibility on soft foundation, seismic stability, and their cost effective. The knowledge of engineering failure is just an important as knowledge of its successes. Recorded cases of SRW failure were found among many factors to be due to inappropriate design of the geogrid as the reinforcement element.
In this study, the critical height of SRW was investigated based on the effect of geogrid stiffness, spacing and length, as well as, surface surcharge load. Using PLAXIS-2D, the numerical results indicate that, in spite of the geogrid vertical spacing is significant parameter to control the stability of segmental retaining wall; the geogrid length is more effective to increase the stability of high walls. On the other hand, stability of SRW is governed by the global factor of safety; however, limits for the wall horizontal displacement as relative to the wall height should be standardized. Limits with correlations for the normalized wall lateral displacement are suggested.
In this study, the critical height of SRW was investigated based on the effect of geogrid stiffness, spacing and length, as well as, surface surcharge load. Using PLAXIS-2D, the numerical results indicate that, in spite of the geogrid vertical spacing is significant parameter to control the stability of segmental retaining wall; the geogrid length is more effective to increase the stability of high walls. On the other hand, stability of SRW is governed by the global factor of safety; however, limits for the wall horizontal displacement as relative to the wall height should be standardized. Limits with correlations for the normalized wall lateral displacement are suggested.
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