Open AccessDetermination of the shear strength of interlayer materials in a clastic rock Aera
Author(s) -
Jianjun Gan
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/332/3/032041
Subject(s) - geotechnical engineering , overburden pressure , shear strength (soil) , suction , matrix (chemical analysis) , geology , shear (geology) , materials science , effective stress , clastic rock , soil water , composite material , soil science , thermodynamics , physics , geomorphology , structural basin
This study focus on the influence of the shear strength in unsaturated soil under different matric suction. 12 groups of GDS tests under different conditions were executed to analysis the relationship between net confining pressure and deviatoric stress. Then, used the unsaturated soil strength theory to calculated the shear strength of the weak interlayer. The results show that under the same confining pressure and unsaturated conditions, the deviatoric stress increase as the matric suction increases. The total cohesive force and the matrix suction of a linear relationship during the test process, the growth of the slope angle for the matrix suction is 6.6°. Finally, a modified formula for shear strength of the soft sandwich silty clay in this landslide was proposed.