Study of mechanical properties of landslides in different stress state. (May 2014)

• Record Type: Journal Article
• Authors: Tu, M. Y.; Lu, Y. F.; Liu, D. F.
• Is Part Of: Materials research innovations. Volume 18:Number 2(2014)
• Page Start: 863
• Page End: 868
• Publication Date: 2014-05
• Subjects: Materials -- Research -- Periodicals; Matériaux -- Recherche -- Périodiques; 620.1105
• DOI: 10.1179/1432891714Z.000000000505
• Languages: English
• ISSNs: 1432-8917

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>The mechanical behaviours of key blocks are analysed for landslides. In general, the deformation of key block is small, and if this occurs, the failure of landslide will happen; or the antisliding force will augment, when the deformation of key block increases, if the key block fails, the landslide failure will occur. The characteristics of force transmit are analysed; the relationships among sliding force, frictional resistance and trust are investigated under the condition that the antisliding forces are not taken the reduction; the critical stress slice is defined to be a state wherein the vector sum of sliding force and frictional resistance is equal to zero, that is the trust is equal to zero. Representative characteristics of thrust between slice blocks are researched, the trust's change between slices will be larger or smaller, when the slice blocks are located at the destroyed zone or the residual stress state (the trust measuring value may be negative or positive); when the stresses of slices take the sate before peak, the thrust's change will be more and more (the measuring value of trust becomes positive). These relative researches are a guiding role for the <italic>in situ</italic> monitoring of landslides. The stable factor obtained by conventional method of landslides is studied by considering the four different stress states (the critical stress state, the destroyed stress state, the residual stress state and their comprehensive stress state); the stable coefficient obtained by conventional critical stress state method is not minimum, and it is obtained when conventional residual stress state is minimum, and their relationships are deduced.</p> </abstract>