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Secondary compression behavior of over-consolidated soft clay after surcharge preloading
https://orcid.org/http://orcid.org/0000-0003-0853-5803
In practical engineering projects, surcharge preloading is used to reduce secondary compression settlement. A soft clay can become over-consolidated after surcharge preloading, and its secondary compression behavior is different from normally consolidated soft clay. In this paper, based on a series of systematic secondary compression tests conducted on reconstituted soft clays, the effects of consolidation pressure, surcharge preloading pressure, and over-consolidation ratio (OCR) on the secondary compression coefficient (Cα) are presented. This study is made for reconstituted soft clay and as such, the conclusions are not relevant for intact soft clay. For normally consolidated reconstituted clay, Cα increases with an increase in the consolidation pressure and decreases slightly tends to stabilize when the consolidation pressure exceeds the pre-consolidation pressure. For over-consolidated reconstituted clay, Cα decreases after surcharge preloading: the higher the surcharge preloading pressure, the lower the value of Cα. With the increase in the OCR from 2 to 16, Cα decreases in different degrees. Based on the results, an exponential relationship between Cα and OCR considering the effect of surcharge preloading is established.
Secondary compression behavior of over-consolidated soft clay after surcharge preloading
https://orcid.org/http://orcid.org/0000-0003-0853-5803
In practical engineering projects, surcharge preloading is used to reduce secondary compression settlement. A soft clay can become over-consolidated after surcharge preloading, and its secondary compression behavior is different from normally consolidated soft clay. In this paper, based on a series of systematic secondary compression tests conducted on reconstituted soft clays, the effects of consolidation pressure, surcharge preloading pressure, and over-consolidation ratio (OCR) on the secondary compression coefficient (Cα) are presented. This study is made for reconstituted soft clay and as such, the conclusions are not relevant for intact soft clay. For normally consolidated reconstituted clay, Cα increases with an increase in the consolidation pressure and decreases slightly tends to stabilize when the consolidation pressure exceeds the pre-consolidation pressure. For over-consolidated reconstituted clay, Cα decreases after surcharge preloading: the higher the surcharge preloading pressure, the lower the value of Cα. With the increase in the OCR from 2 to 16, Cα decreases in different degrees. Based on the results, an exponential relationship between Cα and OCR considering the effect of surcharge preloading is established.
Secondary compression behavior of over-consolidated soft clay after surcharge preloading
https://orcid.org/http://orcid.org/0000-0003-0853-5803
In practical engineering projects, surcharge preloading is used to reduce secondary compression settlement. A soft clay can become over-consolidated after surcharge preloading, and its secondary compression behavior is different from normally consolidated soft clay. In this paper, based on a series of systematic secondary compression tests conducted on reconstituted soft clays, the effects of consolidation pressure, surcharge preloading pressure, and over-consolidation ratio (OCR) on the secondary compression coefficient (Cα) are presented. This study is made for reconstituted soft clay and as such, the conclusions are not relevant for intact soft clay. For normally consolidated reconstituted clay, Cα increases with an increase in the consolidation pressure and decreases slightly tends to stabilize when the consolidation pressure exceeds the pre-consolidation pressure. For over-consolidated reconstituted clay, Cα decreases after surcharge preloading: the higher the surcharge preloading pressure, the lower the value of Cα. With the increase in the OCR from 2 to 16, Cα decreases in different degrees. Based on the results, an exponential relationship between Cα and OCR considering the effect of surcharge preloading is established.
Secondary compression behavior of over-consolidated soft clay after surcharge preloading
Acta Geotech.
Wang, Jun (author) / Zhuang, Heng (author) / Guo, Lin (author) / Cai, Yuanqiang (author) / Li, Mingfeng (author) / Shi, Li (author)
Acta Geotechnica ; 17 ; 1009-1016
2022-03-01
8 pages
Article (Journal)
Electronic Resource
English
Over-consolidation ratio , Reconstituted soft clay , Secondary compression coefficient , Surcharge preloading pressure Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
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