Cracking Characteristics of Fine-Grained Soils
Fine-Grained Soils such as clays, expansive soils, active clay minerals are prone to cracking due to lack of moisture.
Understanding of cracking is necessary for assessing the safety of structures built on or with oil mass.
The cracked soil mass would exhibit extremely high hydraulic conductivity, gas permittivity and reduced strength.
Tensile Strength of Soil
Tensile Strength is defined as the ability of a material to resist a force that tends to pull it apart. Tensile strength is one of the most important mechanical parameters controlling the development of cracks in soil.
Tensile Strength of Soil is a major mechanical parameter controlling the development of tensile cracking, which is commonly encountered in many earth structures.
A typical Triaxial Test involves confining a cylindrical soil or rock specimen in a pressurised cell to simulate a stress condition and then shearing to failure, in order to determine the shear strength properties of the sample. Most triaxial tests are performed on high quality undisturbed specimens.
Triaxial shear strength test on soil measures the mechanical properties of the soil. In this test, soil samples are subjected to stress, such that the stress resulting in one direction will be different in perpendicular direction.
During dry weather clay particles shrink and pull more tightly to each other. This shrinking is what leads to the cracks in the ground.
In the process of desiccation, Cracks are formed by shrinkage of the soil as a reduction of the moisture takes place. Because shrinkage is restricted laterally, internal tensile stresses develop, and cracks initiate once the tensile stresses exceed the tensile strength of the soil.
Log in to save your progress and obtain a certificate in Alison’s free Understanding Cracking, Electrical and Magnetic Characteristics of Geomechanics online course
Sign up to save your progress and obtain a certificate in Alison’s free Understanding Cracking, Electrical and Magnetic Characteristics of Geomechanics online course
Please enter you email address and we will mail you a link to reset your password.