Prediction of Subgrade Reaction Modulus of Clayey Soils by regression analyses: a case study from Qazvin, Iran
Publish place: Second International Conference on Civil Engineering, Architecture and Urban Economy Development
Publish Year: 1394
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
CIVILED02_021
تاریخ نمایه سازی: 19 اردیبهشت 1395
Abstract:
In engineering design of structures, instead of modeling the subsoil in all its complexity, it can bereplaced by a much simpler parameter called subgrade reaction modulus ( s K ). Plate load test (PLT) isone of the frequently applied methods to determine this parameter directly. As the determination of Ksfrom PLT is relatively time-consuming and costly, especially in depths, various empirical correlationshave been proposed to relate the s K to the results of standard penetration tests (SPT) which is one of themost frequently utilized tests during the geotechnical investigation. The purpose of this study is toperform regression analyses to correlate the s K with the corrected SPT blow count ( 60 N ) and soilindex parameters such as liquid limit (LL), plastic index (PI) and fine-grained content (FC) using adatabase containing 123 data set obtained from a geotechnical investigation sites performed in Qazvin,Iran. In accordance with these correlations, new empirical equations are developed. Furthermore, theaccuracy of the previously proposed empirical correlations was determined using the available data. Theresults demonstrate that an improvement with respect to the other correlations has been achieved.
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Authors
Seyed Abolhassan Naeini
Associate Professor, Department of civil engineering, Imam Khomeini
Reza Ziaie Moayed
International University, Qazvin, Iran
Afshin Kordnaeij
PhD. student, Department of civil engineering, Imam Khomeini International University, Qazvin, Iran
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