The Effect of the Quantity and Degree of saturation of Finegrained Portion of Granular Soils in DC Operations
Publish place: The 14th National Congress of Civil Engineering
Publish Year: 1403
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
NCCE14_080
تاریخ نمایه سازی: 25 مهر 1403
Abstract:
DC (Dynamic Compaction) can be regarded theoretically similar to earthquakes, with regard toliquefaction and cyclic mobility trigger, and also blast, with regard to inducing a high amount of energy ina very small fraction of the time. But although there are some similarities, it is none of the above thatmakes the prediction and explanation of the phenomena difficult. It was found that three main factors as۱) quantity of fine grained portion and atterberg limits ۲) the physico-chemical formation of the finegrained portion ۳) degree of saturation governs the efficiency and predominant mechanism of the DCoperations. A case history is discussed briefly and then some conclusions are presented. It was found thein granular soil with high percentage of fine grained portion based on the Atterberg limit and the watercontent of the soil two distinct outcomes may occur, as where before the borderline the DC gavesatisfactory results, the results for the same soil with exactly identical tamping pattern were unacceptableand the tamping energy was completely dissipated and the soil column compaction in the exploitationzone was far below the required specifications.
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Authors
Mohammad Mehdi Pardsouie
PhD Candidate, Civil engineering Department, Estahban branch, Islamic Azad University,Estahban, Iran
Mehdi Mokhberi
Associate professor, Civil engineering Department, Estahban branch, Islamic Azad University,Estahban, Iran
Seyed Alireza Nasehi
Assistant professor, Civil engineering Department, Estahban branch, Islamic Azad University,Estahban, Iran