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Volume Title: ICASGE2023

DOI: ICASGE-GEO

¹Mohamed Tarek Fouad ; ²Manar Adel El Sayed; ³Abd El Rady Abd El Rheem Hassan; ⁴Ahmed Mohey Ibrahim; Mohamed Tarek Fouad; Manar Adel El Sayed; Abd El Rady Abd El Rheem Hassan; Ahmed Mohey Ibrahim

¹Civil Eng. Dept, Faculty of Engineering Al-Azhar University

²Ph.D. Student,Civil Eng Department, Faculty of Engineering, Al-Azhar University,

³Department of Civil Eng, Faculty of Engineering, Al-Azhar University

⁴Housing and Building National Research Center

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.

Segmental retaining wall; geogrid; surcharge load; stability of wall height

Geotechnical Engineering (GEO)