Details

Autor(en) / Beteiligte

• Rui, Rui
• Xia, Rong-ji
• Han, Jie
• Ye, Yu-qiu
• Miao, Xin
• Elabd, Mohamed

Titel

Experimental investigations of lateral earth pressures behind rigid retaining walls under different displacement modes

Ist Teil von

• Acta geotechnica, 2024-05, Vol.19 (5), p.2545-2562

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Displacement mode has a significant influence on the distribution and magnitude of lateral earth pressures and the failure mechanisms of retaining walls. This study performed five model tests to evaluate the responses of coarse sand-backfilled retaining walls under five displacement modes including uniform translation (UT), rotation around the base (RB), rotation around the top (RT), counter-clockwise rotation around the midpoint (RM-CC), and clockwise rotation around the midpoint (RM-C). The measured lateral earth pressures behind each wall were compared with the calculated values using the analytical solutions from the literature. The failure mechanisms of the retaining walls under different displacement modes were evaluated in terms of their backfill deformation and shear strain contours. Test results show that the measured lateral earth pressures at rest and limit equilibrium (LE) had nonlinear distributions, and the RM-C mode resulted in the largest LE earth pressures as compared with the other four modes. The comparisons show that the measured at-rest and LE earth pressures were in good agreement with those calculated by Jaky’s method and Harrop-Williams’ method, respectively. For the retaining walls under the UT, RB, and RT modes, the required wall movement to reach the LE state was approximately 0.4% H where H is the height of the retaining wall. For the retaining walls under the RM-CC and RM-C modes, the required wall movements above the rotation point and below the rotation point to reach the limit equilibrium were 0.4% H and 0.2% H , respectively. The backfill behind the wall under the RB or RM-C mode showed progressive failure, while the backfill under the UT, RT, or RM-CC mode showed quick failure.