Effect of in-situ disturbance within the soil mass on the stress-strain behaviour of silty soil

2nd International Conference on Sustainable Development in Civil, Urban and Transportation Engineering

地球科学;运输工程;经济学

Noor, Sarah T.^1 ; Rahman, S.S. Rabika^2 ; Nahar, Sabiqun^2

Department of Civil Engineering, University of Asia Pacific, Dhaka, Bangladesh^1

Department of Civil Engineering, Military Institute of Science and Technology, Dhaka, Bangladesh^2

关键词: Disturbed soil;    Laboratory test;    Soil behaviour;    Soil conditions;    Stress strain behaviours;    Swelling soils;    Undisturbed soils;    Undisturbed specimens;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/143/1/012035/pdf
DOI  :  10.1088/1755-1315/143/1/012035

来源: IOP

【 摘 要 】

To date, different techniques have been evolved to collect soil in undisturbed condition so that the in-situ soil behaviour can be determined by carrying out laboratory tests. For the same reason, the execution of undisturbed soil sampling in practice is given a lot of efforts. However, this study brings the fact into consideration that the in-situ soil condition may not remain constant, rather it might vary time to time, because of different internal or external reasons. For example, the internal stress state of soil layers, existing below or above the swelling soil layer, become modified during shrinking and swelling resulting from drying and wetting of swelling clay, respectively. Further, foundations of building may transfer cyclic loads (generated by vibration installed in the building) to the soil below the foundation. Therefore, this study investigates the effects of stress-strain behaviour due to the disturbances on the shear strength of the soil with respect to that of undisturbed specimens. The shear strength of disturbed soil shows deviation from that of undisturbed specimen depending on the different parameters defining the severity of disturbance.