Location
San Diego, California
Presentation Date
27 May 2010, 4:30 pm - 6:20 pm
Abstract
Liquefaction of water saturated granular soils is one of the major risks that affect the safety and post-earthquake performance of infrastructure such as bridges, dams, buildings, and lifelines in various parts of the world. The seismically induced ground deformations are often the main concern when liquefaction occurs in significant zones of an earth structure or soil foundation. Recent studies including field data, centrifuge model testing and numerical investigations indicate that large lateral spreads and flow-slides in gentle sandy slopes have taken place when a low permeability silt/clay layer (hydraulic barrier) is present. One of the promising measures to alleviate this barrier effect and ground failures is seismic drains. Currently the effects of seismic drain configuration in plan are well understood and established in the engineering profession. However, most drain improvement schemes comprise of seismic drains that fully penetrate the liquefied soil layer. This paper describes the results of a coupled stress-flow dynamic analysis to investigate the enhancement effect of drain depth on deformations of liquefied slopes with barrier sub-layer. This study showed that drains that fully penetrate the liquefiable depth do not provide the lowest deformations and as a result may not provide the optimum solution.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2010 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Seid-Karbasi, Mahmood and Byrne, Peter M., "Optimum Depth of Seismic Drains for Mitigating Large Deformations in Liquefied Ground with Hydraulic Barrier" (2010). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 29.
https://scholarsmine.mst.edu/icrageesd/05icrageesd/session04/29
Included in
Optimum Depth of Seismic Drains for Mitigating Large Deformations in Liquefied Ground with Hydraulic Barrier
San Diego, California
Liquefaction of water saturated granular soils is one of the major risks that affect the safety and post-earthquake performance of infrastructure such as bridges, dams, buildings, and lifelines in various parts of the world. The seismically induced ground deformations are often the main concern when liquefaction occurs in significant zones of an earth structure or soil foundation. Recent studies including field data, centrifuge model testing and numerical investigations indicate that large lateral spreads and flow-slides in gentle sandy slopes have taken place when a low permeability silt/clay layer (hydraulic barrier) is present. One of the promising measures to alleviate this barrier effect and ground failures is seismic drains. Currently the effects of seismic drain configuration in plan are well understood and established in the engineering profession. However, most drain improvement schemes comprise of seismic drains that fully penetrate the liquefied soil layer. This paper describes the results of a coupled stress-flow dynamic analysis to investigate the enhancement effect of drain depth on deformations of liquefied slopes with barrier sub-layer. This study showed that drains that fully penetrate the liquefiable depth do not provide the lowest deformations and as a result may not provide the optimum solution.
