IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2014  > Vol11 No.6
Effects of Heat Softening on Initiation of Landslides
Xiong Chuan-xiang1,2; Lu Xiao-bing3; Huang Wei-da4; Wang Cheng-hua5
Corresponding AuthorXIONG Chuan-xiang
AbstractEffects of heat softening on the initiation of slide surface (shear banding) in clayey slopes during fast deformation were discussed. Controlling equations considering heat, pore pressure and mechanical movement were presented. By perturbation method, the instability condition of localized zone (i.e. criterion for initiation of shear banding) for thermal related soils, such as clayey slope, was obtained. It is shown that slide surface initiates once the thermal-softening effects overcome the strain-hardening effects whether it is adiabatic or not. Without strain hardening effects, strain rate hardening obviously plays a role in initiation of shear band. During initiating process, heat is trapped inside the shear band, which leads rapidly to a pore pressure increase and fast loss of strength. The localized shear strain is concentrated in a narrow zone with a width of several centimeters at most and increases fast. This zone forms the sliding surface. Temperature can increase more than 2 degrees C, pore pressure can increase 160% in about 0.1s inside this zone. These changes cause the fast decrease in friction-coefficient by about 36% over the initial value. That is how shear band initiated and developed in clayey slopes.
KeywordLandslide Thermo-effect Slide Surface Initiation
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS SubjectEnvironmental Sciences
WOS IDWOS:000345621100019
Funding OrganizationNational Natural Science Foundation of China(11272314 ; Specialized Research Fund for the Doctoral Program of Higher Education of China(20133514110004) ; Chinese Ministry of Transport(201331849A130) ; 51239010)
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
CollectionJournal of Mountain Science_Journal of Mountain Science-2014_Vol11 No.6
Affiliation1.Fuzhou Univ, Sch Environm & Resources, Fuzhou 350108, Peoples R China
2.Fujian Prov Key Lab Remote Sensing Soil Eros & Di, Fuzhou 350108, Peoples R China
3.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China
4.Fujian Acad Bldg Res, Fuzhou 350025, Peoples R China
5.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
Recommended Citation
GB/T 7714
Xiong Chuan-xiang,Lu Xiao-bing,Huang Wei-da,et al. Effects of Heat Softening on Initiation of Landslides[J]. JOURNAL OF MOUNTAIN SCIENCE,2014,11(6):1571-1578.
APA Xiong Chuan-xiang,Lu Xiao-bing,Huang Wei-da,&Wang Cheng-hua.(2014).Effects of Heat Softening on Initiation of Landslides.JOURNAL OF MOUNTAIN SCIENCE,11(6),1571-1578.
MLA Xiong Chuan-xiang,et al."Effects of Heat Softening on Initiation of Landslides".JOURNAL OF MOUNTAIN SCIENCE 11.6(2014):1571-1578.
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