🕑 Reading time: 1 minuteObviously, the quality of undisturbed soil sample is considerably significant. This is because crucial engineering properties for foundation design, such as soil strength, permeability, and compressibility are estimated by testing undisturbed soil samples. There are several factors that influence the quality of undisturbed soil sample such as confining pressure of sampling equipment, volume displacement due to tubes or other collection devices, friction between collection device and the sample, water-content variation in soil specimen, sample handling and transportation, the attitude of drilling crew, and environmental conditions. These factors need to be taken into consideration while undisturbed samples are collected.
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