Properties of Drained Shear Strength of Expansive Soil Considering Low Stresses and Its Influencing Factors

2017 ◽  
Vol 16 (10) ◽  
pp. 1389-1398 ◽  
Author(s):  
Jie Xiao ◽  
Heping Yang ◽  
Junhui Zhang ◽  
Xianyuan Tang
Keyword(s):  
Shear Strength ◽  
Influencing Factors ◽  
Expansive Soil ◽  
Drained Shear Strength

scholarly journals Surficial Failure of Expansive Soil Cutting Slope and Its Flexible Support Treatment Technology

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Jie Xiao ◽  
He-ping Yang ◽  
Jun-hui Zhang ◽  
Xian-yuan Tang
Keyword(s):  
Shear Strength ◽  
Expansive Soil ◽  
Treatment Technology ◽  
Flexible Support ◽  
Cutting Slope ◽  
Soil Cutting ◽  
The Stability ◽  
Vital Factor ◽  
Support Treatment ◽  
Drained Shear Strength

The surficial failure of most expansive soil cutting slopes, subjected to the repeated wet-dry cycles, often occurs during or after rainfall following a long drought. The reason for this, however, is still unclear. Therefore, the laboratory tests were conducted to gain the saturated drained shear strength of the natural Nanning expansive soil considering the combined effects of swelling with loading and wet-dry cycles. The findings indicate that the envelope of shear strength, which significantly drops close or equal to zero, can be well fitted by the generalized power function. At the same time, the effect of shear strength parameters on the stability of the expansive soil cutting slope was investigated. The reasons for the shear strength attenuation of the natural expansive soil and the surficial failure of the expansive soil cutting slopes were analyzed. It is evident that the effective cohesion being small is a vital factor influencing the occurrence of surficial failure of an expansion soil slope. Moreover, an effective flexible support treatment measure was provided.

scholarly journals Shear strength characteristics of Jerash expansive soil

2021 ◽  
Vol 3 (2) ◽  
pp. 74-80
Author(s):  
Talal Masoud
Keyword(s):  
Shear Strength ◽  
Internal Friction ◽  
Water Content ◽  
Direct Shear Test ◽  
Shear Test ◽  
Expansive Soil ◽  
Content Increase ◽  
Direct Shear ◽  
Initial Water ◽  
Angle Of Internal Friction

The results of the direct shear test on Jerash expansive soil show the effect of the initial water content on the cohesion (c) and on the angel of internal friction ( ) [shear strength parameters].it show that, as the initial water increase, the cohesion (c) of Jerash expansive soil also increase up to the shrinkage limit, after that increase of water even small amount, decrease the cohesion of the soil. On the other hand, the results of direct shear test show also  that as the water content increase, the angle of internal friction ( )remain unchanged up to shrinkage limit , any increase of water cause a large decrease on the angle of internal friction of Jerash expansive soil.

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