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|Title||Evaluation of Ground Movement and Pressure Distribution at Gabion Retaining Wall by Field Testing|
The classical theoretical assumption of Rankine’s or Coulomb’s theory has been widely used for retaining wall analysis. Although the assumption is based on sufficient lateral movement that should take place to mobilize fully active conditions behind the wall, the effects of deformation parameters of backfill, wall flexibility and other construction conditions, were not taken into consideration. This case study describes the results from an experimental program where the factors affecting the behavior of gabion retaining wall, constructed within Beach Camp Shore Protection Project, have been investigated. The analyses show that the wall and soil movements have considerable effects on prediction of lateral earth pressures. Based on the experimental results, the coefficient of earth pressure K is determined for a practical design. The tests were carried out on three different conditions of the backfill sand behind a gabion retaining wall, loose, medium and dense cases. A comparison with previous methods is presented in our case study. It was difficult to compare the actual results obtained in both medium and dense cases with the theoretical assumptions since the active condition has not been reached in these two cases. However, this comparison could be made successfully in the loose case where the active condition has been reached. The displacement was within the limited theoretical values to create an active condition. According to the results achieved, it is clear that the value of Rankine coefficient of earth pressure K is overestimated compared with the K value computed from actual results of earth pressure. Key words: active earth pressure; surcharge; inclined surface slope, coefficient of earth pressures K, pressure cells, deformation meter.
|Publisher||the islamic university|
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