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Article: Landslides in the transitional slopes between a loess platform and river terrace, northwest China
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TitleLandslides in the transitional slopes between a loess platform and river terrace, northwest China
 
AuthorsXu, L2
Dai, F2
Tham, LG1
Tu, X2
Jin, Y3
 
KeywordsAgricultural Irrigation
Groundwater Table Rise
Landslide
Loess Platform
 
Issue Date2011
 
CitationEnvironmental And Engineering Geoscience, 2011, v. 17 n. 3, p. 267-279 [How to Cite?]
DOI: http://dx.doi.org/10.2113/gseegeosci.17.3.267
 
AbstractIrrigation-induced loess landslides are common in the transitional slopes between loess platforms and river terraces in northwest China. A typical area of the south Jingyang platform, Shaanxi Province, was selected to investigate such phenomena. Approximately 50 landslides involving loess flowslides and loess slides have occurred since the irrigation of this platform began in 1976. Flowslides can travel a long runout distance at high speed and show a small apparent friction angle. Due to long-term irrigation, the groundwater table in the study area has been substantially raised. To clarify the failure mechanism of loess under these conditions, anisotropically consolidated undrained triaxial tests (ACU) and constant shear drained tests (CSD) were conducted on undisturbed specimens retrieved from the study area. The test results revealed that loess exhibited a sudden collapse behavior with the increase of porewater pressure in a drained condition. The resultant loss of strength in an undrained condition was related to the development of pore-water pressure that reduced the effective stress. For a flowslide, we conclude that the groundwater rises first and causes the collapse of loess in the bottom portion of the slope, which then leads to undrained mobilization. Following the initiation, excess pore-water pressure is generated near the contact between sliding material and river terrace, leading to mobility of the flowslide.
 
ISSN1078-7275
2013 Impact Factor: 0.596
2013 SCImago Journal Rankings: 0.440
 
DOIhttp://dx.doi.org/10.2113/gseegeosci.17.3.267
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorXu, L
 
dc.contributor.authorDai, F
 
dc.contributor.authorTham, LG
 
dc.contributor.authorTu, X
 
dc.contributor.authorJin, Y
 
dc.date.accessioned2012-06-26T06:06:28Z
 
dc.date.available2012-06-26T06:06:28Z
 
dc.date.issued2011
 
dc.description.abstractIrrigation-induced loess landslides are common in the transitional slopes between loess platforms and river terraces in northwest China. A typical area of the south Jingyang platform, Shaanxi Province, was selected to investigate such phenomena. Approximately 50 landslides involving loess flowslides and loess slides have occurred since the irrigation of this platform began in 1976. Flowslides can travel a long runout distance at high speed and show a small apparent friction angle. Due to long-term irrigation, the groundwater table in the study area has been substantially raised. To clarify the failure mechanism of loess under these conditions, anisotropically consolidated undrained triaxial tests (ACU) and constant shear drained tests (CSD) were conducted on undisturbed specimens retrieved from the study area. The test results revealed that loess exhibited a sudden collapse behavior with the increase of porewater pressure in a drained condition. The resultant loss of strength in an undrained condition was related to the development of pore-water pressure that reduced the effective stress. For a flowslide, we conclude that the groundwater rises first and causes the collapse of loess in the bottom portion of the slope, which then leads to undrained mobilization. Following the initiation, excess pore-water pressure is generated near the contact between sliding material and river terrace, leading to mobility of the flowslide.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationEnvironmental And Engineering Geoscience, 2011, v. 17 n. 3, p. 267-279 [How to Cite?]
DOI: http://dx.doi.org/10.2113/gseegeosci.17.3.267
 
dc.identifier.doihttp://dx.doi.org/10.2113/gseegeosci.17.3.267
 
dc.identifier.epage279
 
dc.identifier.issn1078-7275
2013 Impact Factor: 0.596
2013 SCImago Journal Rankings: 0.440
 
dc.identifier.issue3
 
dc.identifier.scopuseid_2-s2.0-84863066603
 
dc.identifier.spage267
 
dc.identifier.urihttp://hdl.handle.net/10722/150651
 
dc.identifier.volume17
 
dc.languageeng
 
dc.publisher.placeUnited States
 
dc.relation.ispartofEnvironmental and Engineering Geoscience
 
dc.relation.referencesReferences in Scopus
 
dc.subjectAgricultural Irrigation
 
dc.subjectGroundwater Table Rise
 
dc.subjectLandslide
 
dc.subjectLoess Platform
 
dc.titleLandslides in the transitional slopes between a loess platform and river terrace, northwest China
 
dc.typeArticle
 
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<contributor.author>Dai, F</contributor.author>
<contributor.author>Tham, LG</contributor.author>
<contributor.author>Tu, X</contributor.author>
<contributor.author>Jin, Y</contributor.author>
<date.accessioned>2012-06-26T06:06:28Z</date.accessioned>
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<description.abstract>Irrigation-induced loess landslides are common in the transitional slopes between loess platforms and river terraces in northwest China. A typical area of the south Jingyang platform, Shaanxi Province, was selected to investigate such phenomena. Approximately 50 landslides involving loess flowslides and loess slides have occurred since the irrigation of this platform began in 1976. Flowslides can travel a long runout distance at high speed and show a small apparent friction angle. Due to long-term irrigation, the groundwater table in the study area has been substantially raised. To clarify the failure mechanism of loess under these conditions, anisotropically consolidated undrained triaxial tests (ACU) and constant shear drained tests (CSD) were conducted on undisturbed specimens retrieved from the study area. The test results revealed that loess exhibited a sudden collapse behavior with the increase of porewater pressure in a drained condition. The resultant loss of strength in an undrained condition was related to the development of pore-water pressure that reduced the effective stress. For a flowslide, we conclude that the groundwater rises first and causes the collapse of loess in the bottom portion of the slope, which then leads to undrained mobilization. Following the initiation, excess pore-water pressure is generated near the contact between sliding material and river terrace, leading to mobility of the flowslide.</description.abstract>
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Author Affiliations
  1. The University of Hong Kong
  2. Institute of Geology and Geophysics Chinese Academy of Sciences
  3. Reconnaissance and Design Institute of Guangxi Power Industry