Residual Strength Characteristics of Naturally and Artificially Cemented Clays in Reversal Direct Box Shear Test

Suzuki, Motoyuki; Tsuzuki, Shunsuke; Yamamoto, Tomohiko

doi:10.3208/sandf.47.1029

Cited by 27 publications

(16 citation statements)

References 26 publications

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“…The advantage of a ring shear test apparatus to measure residual shear strength including its ability to allow unidirectional shearing of a soil specimen (Bishop et al, 1971;Tika, 1999;Suzuki et al, 2007;Bromhead, 1979). Thus, a ring shear apparatus was used in this study.…”

Section: Testing Apparatusmentioning

confidence: 99%

“…Until now, several relationships between the residual strength and soil index parameters have been reported in the literature with a wide range of soil by using various kinds of ring shear apparatus (Hoyos et al, 2014;Jiang et al, 2016;Kimura et al, 2015;Li et al, 2013;. Furthermore, many studies have shown that the shearing rate may or may not affect the minimum value of soil strength at residual states (Suzuki et al, 2007;Grelle and Guadagno, 2010;Gonghui et al, 2010;Bhat, 2013;Tika and Hutchinson, 1999;Lemos, 1985;Morgenstern and Hungr, 1984;Tika, 1999).…”

Section: ． Introductionmentioning

confidence: 99%

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Influence of shearing rate on the residual strength characteristic of three landslides soils in loess area

Lian

Peng

Wang

et al. 2018

Preprint

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Abstract. In order to investigate the effect of the shearing rate on the residual shear strength of slip zone soils, a series ring shear tests were carried out on slip zone soils from three landslides in loess area at the two shearing rates (0.1 mm/min and 1 mm/min). The slip zone soil specimens used in present study were from the northwest of China. Results indicated that the shear displacement to achieve the residual stage for specimens with higher shearing rate is greater than that of the lower rate. Relationship between the residual friction coefficients and normal stress shows that the residual friction coefficients for all specimens under the lower normal stress were greater than that under the higher normal stress at two shearing rate. Furthermore, the difference in the residual friction angle фr at the two shearing rates, фr (1) − фr (0.1), under each normal stress level were either positive or negative values, with the maximum absolute value of фr (1) − фr (0.1) reach up to 2.218°. However, the difference фr (1) − фr (0.1) under all normal stresses was negative, which indicates that the residual shear parameters reduced with the increasing of the shearing rate in loess area.

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Section: Testing Apparatusmentioning

confidence: 99%

Section: ． Introductionmentioning

confidence: 99%

Influence of shearing rate on the residual strength characteristic of three landslides soils in loess area

Lian

Peng

Wang

et al. 2018

Preprint

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“…Some estimates of cohesion in the context of soil stability of shallow landslides indicate a range from 0.7 kPa for fan conglomerates [ Gabet and Dunne , 2002] to ∼5 kPa for colluvium [ Crozier et al , 1990] or clay‐sand mixtures [ Vallejo and Mawby , 2000]. Much greater values up to several tens of kPa have been reported for clay‐rich soils [e.g., Suzuki et al , 2007; Matsushi et al , 2006]. Loss of cohesion due to cement weathering or leaching can increase the risks of slope failure [e.g., Hawkins and McDonald , 1992; Ghobadi , 2000; Froese and Criden , 2001].…”

Section: Fiber Bundle Modelmentioning

confidence: 99%

Fiber bundle model for multiscale modeling of hydromechanical triggering of shallow landslides

Cohen

Lehmann

2009

Water Resources Research

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[1] Sudden and rapid mass movements associated with landslides and snow avalanches present a hazard to life and infrastructure, yet their predictions and triggering mechanisms remain poorly understood. Statistical methods and correlative studies have been used to produce landslide or avalanche susceptibility maps, often with limited physical basis. Mechanistic approaches based on factor-of-safety computation seldom represent the progressive transition from local failure events to a landslide and, in general, do not include heterogeneities associated with land cover or with subsurface material properties and hydrologic pathways. Focusing on rainfall-induced shallow landslides, we propose the use of the fiber bundle model (FBM), a generic yet powerful and adaptable model used in modeling fatigue and fracture of complex and disordered materials. The primary strength of the FBM is its ability to represent the progressive failure of cracks and shear zones and the ruptures of highly heterogeneous bonding elements that are present in soils at all scales. The model also provides a natural framework for interpretation of acoustic emission signatures from failing slopes, which may form the basis of a monitoring and warning system.

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“…However, the use of multiple reversals in the DSD to measure the residual values may not accurately simulate the field conditions, in which large relative displacements occur without changes in direction. A unique advantage of the RSD is that it can shear a specimen for longer displacement without reversing the direction of movement of the mobile half of the specimen relative to the stationary half (Hvorslev 1939;La Gatta 1970;Bishop et al 1971;Bromhead 1979;Tika 1999;Suzuki et al 2007) or changing its principal stress orientations (Duncan and Wright 2005). These contrastingly different features of the RSD, which cannot be achieved in the DSD, facilitate the undisturbed, uni-directional shear motion that is necessary for the clay particles available in a specimen to align parallel to the shear surface, thus reducing the shear strength at the shear surface to the residual conditions (Bishop et al 1971).…”

Section: Introductionmentioning

confidence: 97%

Correlation of large displacement drained shear strength of landslide soils measured by direct shear and ring shear devices

et al. 2011

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Based on a laboratory study of drained direct shear tests of remoulded, pre-cut and polished specimens and drained ring shear tests of uncut and remoulded specimens of slip surface materials of five landslide soils, significant correlations of the mobilized shear strength parameters, cohesion (c, c r ) and internal friction angle (Φ, Φ r ), are proposed. The investigated soils consisted of the slip surface material belonging to tuffaceous clay, mudstone, loess and siltstone. Most of the previous studies on residual shear strength measured by reversal direct shear and ring shear devices have obtained significantly different results using the two devices, even when pre-cut and polished specimens were used in the direct shear device. In this study, the residual shear strength values of remoulded specimens measured by a ring shear device are shown to significantly correlate with the drained large displacement shear strength values of remoulded specimens, which were measured using pre-cut and polished specimens in a direct shear device. The correlation between the cohesion measured in the two shear devices is expressed by the linear relationship, c r ¼ 0:7394c À 6:6857, while the correlation between the friction angle measured in the two devices is expressed by the linear relationship, F r ¼ 1:0852F À 6:0247. The proposed linear correlations for effective cohesion (c′) and effective friction angle (Φ′) have yielded significant coefficients of determination within an effective normal stress range of 30-150kN/m 2 .

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Residual Strength Characteristics of Naturally and Artificially Cemented Clays in Reversal Direct Box Shear Test

Cited by 27 publications

References 26 publications

Influence of shearing rate on the residual strength characteristic of three landslides soils in loess area

Influence of shearing rate on the residual strength characteristic of three landslides soils in loess area

Fiber bundle model for multiscale modeling of hydromechanical triggering of shallow landslides

Correlation of large displacement drained shear strength of landslide soils measured by direct shear and ring shear devices

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