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  3. Sequence dependence of the binding energy in chaperone-driven polymer translocation through a nanopore
بررسی تاثیر جهت های تنش اصلی و تنش میانی های متفاوت بر مقاومت برشی خاک سیلت غیراشباع با استفاده از دستگاه استوانه توخالی
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بررسی تاثیر جهت های تنش اصلی و تنش میانی های متفاوت بر مقاومت برشی خاک سیلت غیراشباع با استفاده از دستگاه استوانه توخالی

ثابتی، علیرضا Sabeti, Alireza

Investigation on the Effect of Principal Stress Direction and Intermediate Principal Stress on Shear Strength of Unsaturated Silty Soil Using Hollow Cylinder Apparatus

Sabeti, Alireza | 2023

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 56756 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Jafarzadeh, Fardin
  7. Abstract:
  8. The ground experiences various hydraulic conditions under climate and groundwater level changes, and it becomes dry or wet frequently. The states of pore-water within the geomaterial, being signified in terms of suction and saturation degree, change during these variations, and consequently affect the soil behavior. The main objective of this research is investigation the effect of anisotropic loading induced by rotation angel of principal axes parameter under unsaturated conditions . Hence, shear strength of firoozkooh silt, in terms of deviatoric stress at failure under monotonic loading under different values of rotation angel of principal stress axes parameter and confining stress have been studied. For this purpose, silty samples have been prepared with predetermined saturation degrees by static compaction method, and shear loading was applied by hollow cylinder apparatus. The results of this research are reported in several perspectives: 1) the effect of the intermediate principal stress on the shear strength of the soil, 2) the effect of the principal stress direc on the shear strength. The results of the experiments show that by increasing the rotational angle of the main axes (α) to about 70 degrees, the shear strength increases and then decreases to 90 degrees. But, this behavior of the soil is different at the intermediate principal stress of 0.5. Also, the maximum amount of shear strain is when the intermediate stress is equal to 0.5.
  9. Keywords:
  10. Hollow Cylinders ; Saturation Degree ; Confining Stress ; Shear Strength ; Induced Anisotropy ; Firoozkooh Silt ; Unsaturated Soil

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