scholarly journals Study of Sericite Quartz Schist Coarse-Grained Soil by Large-Scale Triaxial Shear Tests

2020 ◽  
Vol 8 ◽  
Author(s):  
Hui-qing Zhang ◽  
Feng Zhao ◽  
Shi-qiang Cheng ◽  
Yan-qing Zhang ◽  
Ming-jie Gou ◽  
...  
Keyword(s):  
Large Scale ◽  
Coarse Grained ◽  
Shear Tests ◽  
Coarse Grained Soil

Study on Particle Breakage of Coarse-Grained Soil Based on Large-Scale Triaxial Test

2014 ◽  
Vol 937 ◽  
pp. 585-589
Author(s):  
Fu Yong Chu
Keyword(s):  
Power Function ◽  
Triaxial Test ◽  
Large Scale ◽  
Confining Pressure ◽  
Particle Breakage ◽  
Plastic Work ◽  
Coarse Grained ◽  
Earth Dam ◽  
Relationship Of ◽  
Coarse Grained Soil

Using large-scale shearing device, isotropiclly consolidated-drained triaxial test under different confining pressures are performed for overburden material of ShuangJiangKou earth dam which relative density is 0.8. The relationship between particle breakage of coarse-grained soil and input plastic work under loading and between particle breakage and confining pressure and between particle breakage and strength of coarse-grained soil. The results show that the particle breakage of coarse-grained soil and the input plastic work under loading is closely related. The particle breakage of coarse-grained soil increase with the input plastic work and there is a relationship of power function between Bg andWp. the increase of confining pressure will lead to the increase of particle breakage of coarse-grained soil, and there is a relationship of power function between Bg and. the increase of particle breakage of coarse-grained soil will lead to the decrease of strength of coarse-grained soil, and a relationship of linear between Bg andφ.

Influence Factor on Dilatancy of Coarse-Grained Soil Based on Large-Scale Triaxial Test

2014 ◽  
Vol 919-921 ◽  
pp. 687-692 ◽  
Author(s):  
Fu Yong Chu
Keyword(s):  
Relative Density ◽  
Triaxial Test ◽  
Large Scale ◽  
Confining Pressure ◽  
Coarse Grained ◽  
Earth Dam ◽  
Triaxial Shear Test ◽  
Overburden Material ◽  
Confining Pressures ◽  
Coarse Grained Soil

Abstract：Using large-scale shearing device, K0 consolidated-drained triaxial test and isotropiclly consolidated-drained triaxial test under different confining pressures are performed for overburden material of ShuangJiangKou earth dam which relative density is 0.9. And meanwhile, isotropically consolidated-drained triaxial test under different confining pressures are also performed for overburden material of ShuangJiangKou earth dam which relative density is 0.8. The difference of strength and deformation between under under K0-consolidation condition and isotropic consolidation condition and between under different relative density, and the influence of confining pressure, relative density and consolidation condition on the dilatancy of coarse-grained are analyzed. The results show that the strength of K0 consolidated-drained triaxial shear test is slight greater than that obtained by isotropically consolidated-drained test. The strength of coarse-grained soil increases with increase of relative density.The volume strain value of isotropically consolidated-drained triaxial shear test is bigger than that of K00 consolidated-drained test, and the volume strain value decreases with the decreases of relative density. The dilatancy of coarse-grained soil decreases with the increase of confining pressure, and increases with the increase of static lateral pressure coefficient.

scholarly journals Applicability of UH model to coarse-grained soil

2019 ◽  
Vol 295 ◽  
pp. 03007
Author(s):  
Xiaolong Zhao ◽  
Jungao Zhu ◽  
Hanbing Bian
Keyword(s):  
Large Scale ◽  
Stress Ratio ◽  
Coarse Grained ◽  
Deformation Analysis ◽  
Stress Strain ◽  
Rockfill Dam ◽  
Strain Relationship ◽  
Better Than ◽  
Coarse Grained Soil ◽  
Core Rockfill Dam

Large-scale triaxial, K0 compression and constant stress ratio path tests were carried out on two kinds of coarse-grained soils. Stress-strain relationships of these tests were simulated by using UH model for sands to study the applicability of the model to different stress paths of coarse-grained soil, and the results were compared with those of Duncan’s E-B model. It is shown that the mechanical behaviors of coarse-grained soil can be well described by the UH model, and overall its capacity to reflect stress-strain relationship under different stress paths is better than that of Duncan’s E-B model. Finally, the UH model and Duncan’s E-B model were used for stress-deformation analysis of a core rockfill dam. The applicability of UH model for sands to coarse-grained soil was verified.

Study on Engineering Characteristics of Coarse-Grained Soil Based on Large-Scale Triaxial Test

2014 ◽  
Vol 936 ◽  
pp. 1387-1392
Author(s):  
Fu Yong Chu
Keyword(s):  
Triaxial Test ◽  
Large Scale ◽  
Confining Pressure ◽  
Peak Strength ◽  
Coarse Grained ◽  
Engineering Characteristics ◽  
Increase With Increase ◽  
Initial Modulus ◽  
Relationship Of ◽  
Coarse Grained Soil

Using large-scale shearing device, isotropiclly consolidated-drained triaxial test under different confining pressures are performed for overburden material of ShuangJiangKou earthdam which relative density is 0.9. The engineering characteristics of coarse-grained soil such as strength and deformation is studied. The results show the peak strength of coarse-grained soil under isotropically increase with the confining pressure and there is a relationship of linear between the peak strength of coarse-grained soil and initial modulus. The volume strain value of isotropically consolidated-drained triaxial shear test increase with increase of confining pressure, and the dilatancy decrease increase with increase of confining pressure. The secant modulusEs1and the tangent modulusEt1obtained by the tests both increase with increase with increase of confining pressure, and the values ofEs1/EiandEt1/Eiare all smaller than one. The failure poisson ratioνifobtained by the tests both decrease with increase with increase of confining pressure, and there is a relationship of power function between νif and .

scholarly journals A Constitutive Model Incorporating Mixed Soil Slurry for Interface

2021 ◽  
Vol 276 ◽  
pp. 01021
Author(s):  
Kai Peng ◽  
Guohui Wang ◽  
Yaolai Liu ◽  
Xiaoliang Wang ◽  
Dong Liu ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Strain Softening ◽  
Cement Content ◽  
Experimental Tests ◽  
Coarse Grained ◽  
Model Parameters ◽  
Soil Slurry ◽  
Shear Tests ◽  
Generalized Potential Theory ◽  
Coarse Grained Soil

In projects, mixed soil slurry between cut-off wall and coarse-grained soil always exists. It may influence on or change mechanical properties of interface between coarse-grained soil and structure. The mechanical behaviors of the interface between coarse-grained soil and concrete were investigated by simple shear tests under mixed soil slurry. The significant dilatancy and stress-strain softening can be achieved through the results, which also indicate that the cement content play an important role in the shear strength of the interface. The peak strength and the position when the dilatancy occurs are related to both normal stress and cement content. An elasto-plastic constitutive model for interface considering mixed soil slurry was formulated in the framework of generalized potential theory. The entire model parameters can be identified by experimental tests. Finally, the predictions of the model have been compared with experimental results, and results show the model is reasonable and practical.

Study on Particle Breakage and Strength Characteristic of Different Coarse-Grain Contents

2012 ◽  
Vol 246-247 ◽  
pp. 1037-1041
Author(s):  
Guang Jin Wang ◽  
Yue Tong Si ◽  
Xiang Yun Kong
Keyword(s):  
Shear Stress ◽  
Shear Strength ◽  
Large Scale ◽  
Particle Breakage ◽  
Coarse Grained ◽  
Stress Strain ◽  
Breakage Rate ◽  
Deep Soils ◽  
The Relationship ◽  
Coarse Grained Soil

The significant particle size grading and the particle breakage of deep soils are two major characteristics of super-high dumping-site. Based on the refitted large-scale direct shear experiments, this paper studied the particle breakage and shear strength of different coarse-grained soil. The experimental results indicates a conclusion: particle breakage index is very small when upright stress is less than 400kPa .The breakage rate increases obviously with the increase of upright stress. The particle breakage index is very little when coarse-grained contents are less than 46.0% .It increases significantly when coarse-grained contents are larger than 46.0%. Hyperbolic curves can express the relationship between particle breakage index and upright stress. The experiments studied on shear strength shows that the shear stress-strain curves are micro-softening model or micro-hardening model under low upright stress. The curves are slight-softening model at higher upright stress when the coarse-grained contents are equal to 24.0%. At coarse-grained contents equal 78.0%, the shear stress-strain curves are softening model under low upright stress. The shear strength envelope expressed nonlinear under higher upright stress.

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