The joint strength formula and its application in disaster evaluation of loess slope

There are plenty of steep loess slopes in loess plateau and the stress distribution field of a structural loess slope is usually composed of tension-shear stress areas and compression-shear stress areas. Based on the joint strength of structural loess that can consider comprehensively the features o...

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Bibliographic Details
Published inIOP conference series. Earth and environmental science Vol. 189; no. 2; pp. 22041 - 22046
Main Authors Zhijun, Wang, Jianwen, Luo, Junyi, Pan, Rongjian, Li
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.11.2018
Subjects
Compression
Compressive strength
Computer applications
Landslides
Loess
Moisture content
Safety factors
Shear strength
Shear stress
Slope stability
Slopes
Stability analysis
Stress concentration
Stress distribution
Stress ratio
Structural stability
Tensile strength
Water content
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Summary:There are plenty of steep loess slopes in loess plateau and the stress distribution field of a structural loess slope is usually composed of tension-shear stress areas and compression-shear stress areas. Based on the joint strength of structural loess that can consider comprehensively the features of tensile strength and shear strength, the structural parameter of stress ratio was also introduced into the joint strength formula of structural loess. Then the triggering mechanism of a structural loess landslide was analyzed. The results show that the increase of water content in loess slope not only lead to a reduction in tensile strength, but also the safety factor of the structural loess slope gradually decreased to the occurrence of instability. The joint strength provides a more practical computational approach for assessing the stability of structured loess slopes.
ISSN:1755-1307
1755-1315
1755-1315
DOI:10.1088/1755-1315/189/2/022041