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Experimental investigations of lateral earth pressures behind rigid retaining walls under different displacement modes
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.
Experimental investigations of lateral earth pressures behind rigid retaining walls under different displacement modes
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.
Experimental investigations of lateral earth pressures behind rigid retaining walls under different displacement modes
Acta Geotech.
Rui, Rui (author) / Xia, Rong-ji (author) / Han, Jie (author) / Ye, Yu-qiu (author) / Miao, Xin (author) / Elabd, Mohamed (author)
Acta Geotechnica ; 19 ; 2545-2562
2024-05-01
18 pages
Article (Journal)
Electronic Resource
English
Displacement mode , Earth pressure , Failure mechanism , Limit equilibrium , Model test , Retaining wall Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
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