Characterization of the Shear-Induced Potential (SIP) in Clay and the Application to Landslide Sites
Location
Arlington, Virginia
Date
15 Aug 2008, 11:00am - 12:30pm
Abstract
Electrical polarizations were observed in common fine soil aggregates in shear deformation tests and simulations conducted in a laboratory. This electric potential is called Shear-induced Potential (SIP). The SIP can be interpreted as the physicochemical interaction between the surface of clay particles and interstitial water by the kinetics of the electric double layer. The SIP could not be detected in a remolded craft clay sample, which was possibly treated with electrically non-dipole oil. In the laboratory, a plane strain test under the un-drained condition was carried out to reveal the characteristics of the polarization accompanying the shear deformation. Gouges from the active faults were remolded with saline water and consolidated axially under the condition of K0 as the test specimen. The polarities of the electric charges induced at the surfaces of the specimens were positive, neutral and negative for the maximum (tensional), intermediate and minimum principal strain axial planes, respectively. In addition, in-situ observations of the spontaneous potential (SP) were performed at gravitationally unstable sites to verify the results obtained in the laboratory. The characteristic distributions of the charge and time variation of SP were consistent with the pattern observed by the scaled model experiments in the laboratory.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
6th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2008 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
Nakagawa, Koichi; Yamada, Shigenobu; and Tsuka, Isamu, "Characterization of the Shear-Induced Potential (SIP) in Clay and the Application to Landslide Sites" (2008). International Conference on Case Histories in Geotechnical Engineering. 1.
https://scholarsmine.mst.edu/icchge/6icchge/session06b/1
Characterization of the Shear-Induced Potential (SIP) in Clay and the Application to Landslide Sites
Arlington, Virginia
Electrical polarizations were observed in common fine soil aggregates in shear deformation tests and simulations conducted in a laboratory. This electric potential is called Shear-induced Potential (SIP). The SIP can be interpreted as the physicochemical interaction between the surface of clay particles and interstitial water by the kinetics of the electric double layer. The SIP could not be detected in a remolded craft clay sample, which was possibly treated with electrically non-dipole oil. In the laboratory, a plane strain test under the un-drained condition was carried out to reveal the characteristics of the polarization accompanying the shear deformation. Gouges from the active faults were remolded with saline water and consolidated axially under the condition of K0 as the test specimen. The polarities of the electric charges induced at the surfaces of the specimens were positive, neutral and negative for the maximum (tensional), intermediate and minimum principal strain axial planes, respectively. In addition, in-situ observations of the spontaneous potential (SP) were performed at gravitationally unstable sites to verify the results obtained in the laboratory. The characteristic distributions of the charge and time variation of SP were consistent with the pattern observed by the scaled model experiments in the laboratory.
