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A platform for research: civil engineering, architecture and urbanism
Surcharge Induced Earth Pressure Reduction on Rigid Retaining Wall Using EPS Geofoam
Retaining walls are constructed to withstand earth pressure and lateral thrust due to backfilling, surcharge pressures from foundations of adjacent structures, and traffic-induced loading. Reduction in earth pressure and lateral thrust on these walls, by providing compressible geo-inclusion, helps to economize the project cost. In the present study, small-scale experiments were carried out for cases of retaining wall without geofoam, with 10D (10 kg/m3 density) geofoam and 15D geofoam. Results of earth pressure distribution, backfill surface settlement and EPS geofoam compression under effect of three different surcharge pressures (viz. 10 kPa, 30 kPa and 50 kPa) are obtained. Reductions of 25.3% and 21.8% in lateral thrust were observed with 10D and 15D geofoam inclusions, respectively. Maximum geofoam compression in the range of 0.68 mm and 0.38 mm were observed for 10D and 15D geofoam, respectively. The surface settlement in the range of 1.8 mm, 2 mm and 2.6 mm were observed for cases of nofoam, 15D and 10D geofoam inclusions, respectively. The results of numerical analysis using finite element analysis code (PLAXIS) for a full-scale retaining wall revealed that, though geofoam of lower density helped to reduce more lateral thrust, considering serviceability and geofoam compression, minimum geofoam density of 15D is preferable.
Surcharge Induced Earth Pressure Reduction on Rigid Retaining Wall Using EPS Geofoam
Retaining walls are constructed to withstand earth pressure and lateral thrust due to backfilling, surcharge pressures from foundations of adjacent structures, and traffic-induced loading. Reduction in earth pressure and lateral thrust on these walls, by providing compressible geo-inclusion, helps to economize the project cost. In the present study, small-scale experiments were carried out for cases of retaining wall without geofoam, with 10D (10 kg/m3 density) geofoam and 15D geofoam. Results of earth pressure distribution, backfill surface settlement and EPS geofoam compression under effect of three different surcharge pressures (viz. 10 kPa, 30 kPa and 50 kPa) are obtained. Reductions of 25.3% and 21.8% in lateral thrust were observed with 10D and 15D geofoam inclusions, respectively. Maximum geofoam compression in the range of 0.68 mm and 0.38 mm were observed for 10D and 15D geofoam, respectively. The surface settlement in the range of 1.8 mm, 2 mm and 2.6 mm were observed for cases of nofoam, 15D and 10D geofoam inclusions, respectively. The results of numerical analysis using finite element analysis code (PLAXIS) for a full-scale retaining wall revealed that, though geofoam of lower density helped to reduce more lateral thrust, considering serviceability and geofoam compression, minimum geofoam density of 15D is preferable.
Surcharge Induced Earth Pressure Reduction on Rigid Retaining Wall Using EPS Geofoam
Dave, T. N. (author) / Dasaka, S. M. (author)
Geo-Shanghai 2014 ; 2014 ; Shanghai, China
Tunneling and Underground Construction ; 836-844
2014-05-05
Conference paper
Electronic Resource
English
Surcharge Induced Earth Pressure Reduction on Rigid Retaining Wall Using EPS Geofoam
| British Library Conference Proceedings | 2014