Mitrani, H and Madabhushi, SPG (2013) Geomembrane containment walls for liquefaction remediation. Proceedings of the Institution of Civil Engineers: Ground Improvement, 166. pp. 9-20. ISSN 1755-0750Full text not available from this repository.
Ground improvement techniques can be adopted to prevent existing buildings built on liquefiable soils sustaining damage in future earthquakes. Impermeable geomembrane containment walls may be an economic and successful technique but their design and performance are currently not well defined or well understood for this application. This paper describes centrifuge testing carried out to investigate the performance of such containment walls as a liquefaction remediation method for a single degree of freedom frame structure. The results were compared with those from similar centrifuge testing carried out with the same structure founded on unimproved sand, to assess the effectiveness of the remediation method. It was found that the geomembrane containment walls tested were effective at reducing structural settlement and did not significantly increase the accelerations transmitted to the structure. Structural settlements were reduced primarily by mobilising hoop stress and preventing lateral soil movement. By preventing surface drainage, a decrease in the volume change of the foundation sand was also observed. In addition, the impermeability of the walls may be important as this prevented rapid migration of pore water fromthe free field to the foundation region.
|Uncontrolled Keywords:||Geotechnical engineering Models (physical) Seismic engineering|
|Divisions:||Div D > Geotechnical and Environmental|
|Depositing User:||Cron job|
|Date Deposited:||16 Jul 2015 13:58|
|Last Modified:||01 Aug 2015 01:22|