Shear Resistance Variations in Experimentally Sheared Mudstone Granules: A Possible Shear‐Thinning and Thixotropic Mechanism
@article{Hu2017ShearRV, title={Shear Resistance Variations in Experimentally Sheared Mudstone Granules: A Possible Shear‐Thinning and Thixotropic Mechanism}, author={Wei Hu and Qiang Xu and Gonghui Wang and Gianvito Scaringi and Mauri McSaveney and P-Y. Hicher}, journal={Geophysical Research Letters}, year={2017}, volume={44}, pages={11,040 - 11,050} }
We present results of ring shear frictional resistance for mudstone granules of different size obtained from a landslide shear zone. Little rate dependency of shear resistance was observed in sand‐sized granules in any wet or dry test, while saturated gravel‐sized granules exhibited significant and abrupt reversible rate‐weakening (from μ = 0.6 to 0.05) at about 2 mm/s. Repeating resistance variations occurred also under constant shear displacement rate. Mudstone granules generate mud as they…
20 Citations
Effects of clay content on the shear behaviors of sliding zone soil originating from muddy interlayers in the Three Gorges Reservoir, China
- Geology, Materials ScienceEngineering Geology
- 2021
RING SHEAR TEST ON UNSATURATED SOIL. EFFECT OF FAST SHEARING RATE ON RESIDUAL STRENGTH
- Geology
- 2019
Residual shear strength of slip-surface soils is an important issue for investigating landslide mechanisms and evaluating the potential reactivation (Skempton, 1985). So far, many researchers focused…
Physical mechanical characterization of a rockslide shear zone by standard and unconventional tests
- GeologyLandslides
- 2019
Field and monitoring evidences show that deformation in a rockslide is predominantly localized along a basal shear zone. Mineralogic, grain size, thickness, and fabric characteristics of the shear…
Formation and chemo-mechanical characteristics of weak clay interlayers between alternative mudstone and sandstone sequence of gently inclined landslides in Nanjiang, SW China
- GeologyBulletin of Engineering Geology and the Environment
- 2020
Sedimentary rocks with alternating mudstone and sandstone sequence are susceptible to landslides even under very gentle slope inclinations. Continued occurrences of such landslides in Nanjiang, South…
Shear rate effect on residual strength of typical clay soils
- Innovative Infrastructure Solutions
- 2021
Residual strength parameters of clay soils along the slip surface of a slope are important parameters for stability analysis and countermeasure works against the activation and reactivation of…
Discussion on: “Experimental study of residual strength and the index of shear strength characteristics of clay soil” [Eng.Geo.233:183–190]
- GeologyEngineering Geology
- 2018
Acoustic Emissions and Microseismicity in Granular Slopes Prior to Failure and Flow‐Like Motion: The Potential for Early Warning
- GeologyGeophysical Research Letters
- 2018
Rain‐triggered landslides in loosely packed granular deposits are highly hazardous because of their sudden failure, flow‐like motion, and high mobility. Predicting their initiation and establishing…
Environmental Geological Problems in Southwest China: A Case Study from the Researches of Regional Landslide Hazards
- GeologyNature Environment and Pollution Technology
- 2022
Humans have paid a lot of attention to environmental geological challenges in recent years. Landslides, being one of the most prevalent geological disasters, are characterized by their suddenness and…
References
SHOWING 1-10 OF 68 REFERENCES
Evolution of Shear-Zone Structure in Undrained Ring-Shear Tests
- Geology
- 2004
Undrained monotonic torque-controlled tests were conducted on fine-grained silica sand to study the shear-deformation process in granular materials by using a ring-shear apparatus. Shear-zone…
Effects of shear rate on shear strength and deformation characteristics of coarse-grained soils in large-scale direct shear tests
- Materials Science, Geology
- 2013
The strength and deformation of soils play an important role in the stability of slopes and subgrades.In order to analyze the influence of shear rate on shear strength and deformation characteristics…
Effects of test conditions on shear behaviour of composite soil
- Geology
- 2013
Test conditions, such as shearing rate and normal stress, have been long recognised as influencing the measured shear strength of clays and sands. However, their influence on composite soils, which…
Ring shear tests on slip zone soils of three giant landslides in the Three Gorges Project area
- Geology
- 2013
Observation of shear zone development in ring-shear apparatus with a transparent shear box
- Geology
- 2006
Using a new ring-shear apparatus with a transparent shear box and video image analysis system, drained and undrained speed-controlled tests were conducted on coarse-grained silica sands to study the…
High velocity ring shear tests on sand
- Geology
- 1984
Ring shear tests on sand materials have been carried out to show whether there is a change in the behaviour of these materials at high shearing rates and normal stresses. This question is relevant to…
Experimental Study on the Rate Effect on the Shear Strength
- Geology
- 2006
This paper presents a relation between the shear strength and the shear rate in cohesive soils. Tests were carried out by means of an undrained ring shear apparatus on Silica sand, Silica sand-Illite…
Effect of Shearing Rate on Residual Strength of Landslide Soils
- Materials Science
- 2015
The change in shearing rate due to the earthquake or volcanic activities may affect the residual strength of the slip surface soils of a reactivated landslide. Few studies have been performed to…
Monotonic fast residual strength of clay soils.
- Geology
- 2006
Summary A laboratory study on the fast residual strength of clay soils is present in this paper. Laboratory tests were carried out at the Imperial College of London with the IC/NGI ring shear…