scholarly journals Residual strength parameters by the ring shear test using samples near slip surface of landslide

2004 ◽  
Vol 41 (4) ◽  
pp. 393-398
Author(s):  
Hidehiko MURAO ◽  
Tatsuya SHIBUYA
Keyword(s):  
Residual Strength ◽  
Shear Test ◽  
Slip Surface ◽  
Strength Parameters ◽  
Ring Shear Test ◽  
Ring Shear

Residual strength of smectite-dominated soils from the Kamenose landslide in Japan

1987 ◽  
Vol 24 (3) ◽  
pp. 456-462 ◽  
Author(s):  
Seiichi Gibo ◽  
Kazuhiko Egashira ◽  
Masami Ohtsubo
Keyword(s):  
Residual Strength ◽  
Shear Test ◽  
Slip Surface ◽  
Clay Fraction ◽  
Particle Orientation ◽  
Shear Mode ◽  
Ring Shear Test ◽  
Ring Shear ◽  
Shearing Resistance ◽  
Clay Fraction Content

The residual strength of smectite-dominated soils from the main slip surfaces of the Kamenose landslide, Japan, was measured by ring shear test, and the relations of the residual strength to the clay fraction content and clay particle orientation were studied. The residual angles of shearing resistance, [Formula: see text], were estimated assuming that the residual cohesion is zero. The magnitude of the residual angle of shearing resistance was dependent on the <2-μm clay fraction content, CF, and on the effective normal stress, [Formula: see text], because of curved strength lines. At [Formula: see text] equivalent to the overburden pressures, the soils had [Formula: see text] of 6–8°. These residual angles of shearing resistance were fitted on the [Formula: see text] – CF line for sand–bentonite mixtures, and exhibited the sliding shear mode.The orientation of smectite particles on shear surfaces showing slickensides was assessed by X-ray diffraction technique. The orientation of smectite particles was found to reduce the residual strength considerably, and this orientation effect was revealed more clearly at low effective normal stresses. Key words: residual strength, particle orientation, landslide, smectite, shear mode, slip surface, slickenside, clay mineral, physicochemical properties, ring shear test.

Effect of cyclic loading on the residual strength of over-consolidated silty clay in a ring shear test

Landslides ◽  
2011 ◽  
Vol 8 (2) ◽  
pp. 233-240 ◽  
Author(s):  
Yong Hong ◽  
Guangming Yu ◽  
Yingxia Wu ◽  
Xiaoyu Zheng
Keyword(s):  
Cyclic Loading ◽  
Residual Strength ◽  
Shear Test ◽  
Silty Clay ◽  
Ring Shear Test ◽  
Ring Shear

scholarly journals Relation between Residual Strength and Shear Displacement of Clay in Ring Shear Test.

1997 ◽  
pp. 141-158
Author(s):  
Motoyuki Suzuki ◽  
Takeo Umezaki ◽  
Hiroshi Kawakami
Keyword(s):  
Residual Strength ◽  
Shear Test ◽  
Shear Displacement ◽  
Ring Shear Test ◽  
Ring Shear

scholarly journals Comparison of microscopic structure in shear plane of the ring shear test and slip surface

2015 ◽  
Vol 52 (3) ◽  
pp. 123-131
Author(s):  
Hidehiko MURAO ◽  
Toshitaka KAMAI ◽  
Toru NOZAKA
Keyword(s):  
Shear Test ◽  
Slip Surface ◽  
Shear Plane ◽  
Microscopic Structure ◽  
Ring Shear Test ◽  
Ring Shear

Residual Strength: Does BS 5930 Help or Hinder?

1986 ◽  
Vol 2 (1) ◽  
pp. 279-282 ◽  
Author(s):  
A. B. Hawkins ◽  
K. D. Privett
Keyword(s):  
Stability Analysis ◽  
Normal Stress ◽  
Residual Strength ◽  
Clay Content ◽  
Failure Envelope ◽  
Strength Parameters ◽  
Effective Normal Stress ◽  
Ring Shear ◽  
Stress Dependent ◽  
Shear Box

AbstractBS 5930 offers little assistance to engineers wishing to use residual strength parameters in slope stability analysis. It wrongly suggests the ring shear gives lower parameters than the shear box.BS 5930 does not mention the fact that the residual strength is stress dependent, hence the failure envelope is curved and the parameters must be assessed using an appropriate effective normal stress. For this reason the correlation charts relating ϕ′R to plasticity index or clay content need replacing with a series of charts in which these properties are plotted against ϕ′R values obtained at a number of effective normal stress loadings. Even then such correlations should be treated with caution.

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