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A platform for research: civil engineering, architecture and urbanism
Assessing the Risk of Internal Erosion in Embankments and Foundations
Internal erosion by piping is one of the main causes responsible for the failure of earth structures such as embankments, dams, and foundations. This phenomenon occurs when concentrated leakage develop in pre-existing defects in the soil structures. The erosion characteristics are described by the erosion rate index ranging from 0 to 6 indicating that the rate of erosion of soil can vary up to 106 times. To study this complex behavior, a new experimental device was developed to simulate the conditions of internal erosion. It was designed using CAD and made up of stainless steel. It mainly consisted of a semi-cylindrical mold and rectangular sheet made of perspex. A digital camera was used to capture the propagation of groove in the soil to measure the internal erosion characteristics. The effect of plasticity index and fine fraction on the rate of internal erosion and critical shear stress were studied. A series of erosion tests was performed under constant head loss in order to quantify the critical shear stress (τc) and the coefficient of piping erosion (ker) of five different soils. It was observed that critical shear stress increased while coefficient of soil erosion decreased with increase in fine fraction. An easy, quick, and economical approach which could be applicable in both constructed earth structures and natural river banks for determining their susceptibility to internal erosion was achieved through this study.
Assessing the Risk of Internal Erosion in Embankments and Foundations
Internal erosion by piping is one of the main causes responsible for the failure of earth structures such as embankments, dams, and foundations. This phenomenon occurs when concentrated leakage develop in pre-existing defects in the soil structures. The erosion characteristics are described by the erosion rate index ranging from 0 to 6 indicating that the rate of erosion of soil can vary up to 106 times. To study this complex behavior, a new experimental device was developed to simulate the conditions of internal erosion. It was designed using CAD and made up of stainless steel. It mainly consisted of a semi-cylindrical mold and rectangular sheet made of perspex. A digital camera was used to capture the propagation of groove in the soil to measure the internal erosion characteristics. The effect of plasticity index and fine fraction on the rate of internal erosion and critical shear stress were studied. A series of erosion tests was performed under constant head loss in order to quantify the critical shear stress (τc) and the coefficient of piping erosion (ker) of five different soils. It was observed that critical shear stress increased while coefficient of soil erosion decreased with increase in fine fraction. An easy, quick, and economical approach which could be applicable in both constructed earth structures and natural river banks for determining their susceptibility to internal erosion was achieved through this study.
Assessing the Risk of Internal Erosion in Embankments and Foundations
Lecture Notes in Civil Engineering
Patel, Satyajit (editor) / Solanki, C. H. (editor) / Reddy, Krishna R. (editor) / Shukla, Sanjay Kumar (editor) / Sharma, Ishant (author) / Juneja, Ashish (author)
2021-05-06
11 pages
Article/Chapter (Book)
Electronic Resource
English
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