G Shear Test to Determine Shear Characteristics of Coarse Grained Soils at Low Normal Stresses

2018 ◽  
pp. 114-122
Author(s):  
V. Padmavathi ◽  
M. R. Madhav
Keyword(s):  
Shear Test ◽  
Coarse Grained ◽  
Normal Stresses ◽  
Shear Characteristics

scholarly journals Determining the Shear Strength Properties of a Soil-geogrid Interface Using a Large-scale Direct Shear Test Apparatus

2020 ◽  
Author(s):  
Jakub Stacho ◽  
Monika Sulovska ◽  
Ivan Slavik
Keyword(s):  
Shear Stress ◽  
Shear Strength ◽  
Large Scale ◽  
Direct Shear Test ◽  
Shear Test ◽  
Strength Properties ◽  
Coarse Grained ◽  
Direct Shear ◽  
Test Apparatus ◽  
Fine Gravel

The paper deals with the laboratory testing of coarse-grained soils that are reinforced using a geogrid. The shear strength properties were determined using a large-scale direct shear test apparatus. The tests were executed on original as well as on reinforced soil, when the geogrid was placed on a sliding surface, which permitted determining the shear strength properties of the soil-geogrid interface. The aim of the tests was to determine the interface shear strength coefficient α, which represents the ratio of the shear strength of the soil-geogrid interface to the unreinforced soil. The tests were executed on 3 samples of coarse-grained materials, i.e., poorly graded sand, poorly graded fine gravel and poorly graded medium gravel. Two types of geogrids were tested, i.e., a woven polyester geogrid and a stiff polypropylene geogrid. The results of the laboratory tests on the medium gravel showed that the reduction coefficient α reached higher values in the case of the stiff polypropylene geogrid. In the cases of the fine gravel and sand, the values of the interface coefficient α were similar to each other. The shear strength of the interface was reduced or was similar to the shear strength of unreinforced soil in a peak shear stress state, but significantly increased with horizontal deformations, especially for the fine gravel and sand. The largest value of the coefficient α was measured in the critical shear stress state. Based on the results of the testing, a correlation which allows for determining the optimal grain size distribution was obtained.

Comparison of One-Way Shearing Test between Coarse-Grained Soils and Reinforced Earth

2014 ◽  
Vol 496-500 ◽  
pp. 2469-2473
Author(s):  
Guo Dong Deng ◽  
Jia Sheng Zhang ◽  
Xiong Shi ◽  
Fei Meng ◽  
Liang Liang Song ◽  
...  
Keyword(s):  
Internal Friction ◽  
Normal Direction ◽  
Cohesive Force ◽  
Coarse Grained ◽  
Normal Stresses ◽  
Reinforced Earth ◽  
Shearing Strength ◽  
The Difference ◽  
The One

One-way shearing test of the coarse-grained soils and the reinforced earth was carried out under different normal stresses. The one-way shearing curves of coarse-grained soils and reinforced earth are similar. The changed curves of normal direction deformation with the shearing distance of coarse-grained soils and reinforced earth are also similar. Trend of the curve for the normal direction deformation and the reinforced earth is shrink at first and then expand continually. Under different vertical stresses, the difference of the curve for the normal direction shift and the reinforced shift is larger. Compared with raw coarse-grained soils, the cohesive force (c) of the reinforced earth increased, but the angle internal friction (φ) decreased for the reason that the articulation effect between the grilling, and the coarse-grained soils was reduced in the progress of shearing. So, the anti-shearing strength was decreased.

A Triaxial-Measurement Shear-Test Device for Soft Biological Tissues

2000 ◽  
Vol 122 (5) ◽  
pp. 471-478 ◽  
Author(s):  
Socrates Dokos ◽  
Ian J. LeGrice ◽  
Bruce H. Smaill ◽  
Julia Kar ◽  
Alistair A. Young
Keyword(s):  
Shear Test ◽  
Biological Tissues ◽  
Living Tissue ◽  
Test Device ◽  
Shear Tests ◽  
Shear Deformations ◽  
Material Parameters ◽  
Independent Test ◽  
Shear Characteristics ◽  
Septal Myocardium

A novel shear-test device for soft biological tissue, capable of applying simple shear deformations simultaneously in two orthogonal directions while measuring the resulting forces generated in three axes, is described. We validated the device using a synthetic gel, the properties of which were ascertained from independent tensile and rotational shear tests. Material parameters for the gel were fitted using neo-Hookean analytical solutions to the independent test data, and these matched the results from the device. Preliminary results obtained with rat septal myocardium are also presented to demonstrate the feasibility of the apparatus in determining the shear characteristics of living tissue. [S0148-0731(00)00205-3]

The Contrastive Research of Direct Shear Test on Different Pile-Soil Interface

2011 ◽  
Vol 90-93 ◽  
pp. 1743-1747
Author(s):  
Dong Wang ◽  
Jian Xin Zhang ◽  
Bin Tian ◽  
Jia Cao
Keyword(s):  
Shear Stress ◽  
Shear Strength ◽  
Normal Stress ◽  
Laboratory Tests ◽  
Direct Shear Test ◽  
Shear Test ◽  
Normal Stresses ◽  
Friction Resistance ◽  
Striking Change ◽  
Soil Interface

In order to discuss the friction resistance properties between pile and soil, three groups of shear laboratory tests of pile-soil interface are adopted among concrete-soil , steel-soil and plastic(HDPE)-soil, and each test applies six normal stresses. The result indicates that with the growth of normal stress, the shear strength of pile-soil are increased; under the same normal stress, there is little change in frontal parts of curve with shear stress and displacement, but the rest of curve have a striking change along with the increase of normal stress; when the normal stress is less, the shear stress of different interfaces have little change; when the normal stress is greater, it shows that the shear strength of HDPE-soil interface is the greatest.

scholarly journals Shear characteristics of over consolidated peat in constant volume ring shear test

2008 ◽  
Vol 3 (3) ◽  
pp. 175-186
Author(s):  
Masaru IGARASHI ◽  
Hiroshi OIKAWA ◽  
Toshihiro OGINO ◽  
Masaki TSUSHIMA
Keyword(s):  
Shear Test ◽  
Constant Volume ◽  
Ring Shear Test ◽  
Ring Shear ◽  
Shear Characteristics
Sign in / Sign up

Export Citation Format

Share Document