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RISS 인기검색어
- 검색키워드
- 저자 : Enkhtur Odgerel (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Evaluation of the Settlement Influence Factors of Shallow Foundation by Numerical Analyses
Odgerel Enkhtur,Tien Dung Nguyen,김진만,김성률 대한토목학회 2013 KSCE JOURNAL OF CIVIL ENGINEERING Vol.17 No.1
Several empirical and analytical methods have been proposed to estimate the elastic settlement of shallow foundations based on the elastic continuum theory. Previous methods have been generally proposed for circular foundations, its approach of using equivalent diameter was found less reliable for foundations of aspect ratio L/B > 2. This paper presents a three-dimensional numerical analysis to extend and improve the applicability of settlement influence and correction factors for shallow foundations of large aspect ratios. First, a methodical optimization and verification program was conducted to determine and verify a reliable model for numerical analysis. Using the verified model, two new sets of settlement influence factor and correction factor for foundation roughness of circular and rectangular foundations were then derived and proposed. A correction factor chart for the foundation rigidity of rectangular foundations was also proposed. Finally, the applicability of the proposed factors in this study was verified by comparing calculated settlements using the proposed factors along with the measured values from two raft foundations. The proposed approach was indicated to be a better alternative for foundations of L/B > 2.
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Geotechnical Characterisation of Busan Clay
정성교,류춘길,민세찬,이정만,홍양표,Enkhtur Odgerel 대한토목학회 2012 KSCE JOURNAL OF CIVIL ENGINEERING Vol.16 No.3
In the Nakdong River delta, the depositional environment is slightly different in every locality. An attempt was made to conduct a geotechnical characterization of clay in the floodplain of the delta area, where a series of field and laboratory tests was executed at five sites. The results indicate that variations in the slope of cone resistance change with depth are utilized to stratify the deposits and to extend a paleoenvironmental profile that has been investigated at a neighboring site. Some of the index properties and the compression index appear to correlate with the depositional environment, so that they have a well-defined trend with depth irrespective of location and empirical formulas may be developed between them. However, on the top 10 m layer deposited during regression, several properties are different in the tested sites. The ratio of the field vane strength to the effective overburden stress shows a poor correlation with water content, indicating no relationship with the plasticity index. The in-situ void index Iv0 shows that clays of the Tidal Flat (TF) and Inner Shelf (IS) units are more structured than other normally consolidated clays, whereas that of the Shallow Marine (SM) unit, which is overconsolidated, is not. The sensitivity (St), ranging from 5 to 9 at a location, vary in a manner similar to a well-defined trend of the properties. Based on the Iv0, recompression, and Cc-e0-St relation, the clay is moderately or highly structured but weakly bonded, where Cc is compression index and e0 is initial void ratio.
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Geotechnical Characterisation of Busan Clay
Chung, Sung Gyo,Ryu, Choon Kil,Min, Se Chan,Lee, Jung Man,Hong, Yang Pyo,Odgerel, Enkhtur 대한토목학회 2012 KSCE JOURNAL OF CIVIL ENGINEERING Vol.16 No.3
In the Nakdong River delta, the depositional environment is slightly different in every locality. An attempt was made to conduct a geotechnical characterization of clay in the floodplain of the delta area, where a series of field and laboratory tests was executed at five sites. The results indicate that variations in the slope of cone resistance change with depth are utilized to stratify the deposits and to extend a paleoenvironmental profile that has been investigated at a neighboring site. Some of the index properties and the compression index appear to correlate with the depositional environment, so that they have a well-defined trend with depth irrespective of location and empirical formulas may be developed between them. However, on the top 10 m layer deposited during regression, several properties are different in the tested sites. The ratio of the field vane strength to the effective overburden stress shows a poor correlation with water content, indicating no relationship with the plasticity index. The in-situ void index $I_{v0}$ shows that clays of the Tidal Flat (TF) and Inner Shelf (IS) units are more structured than other normally consolidated clays, whereas that of the Shallow Marine (SM) unit, which is overconsolidated, is not. The sensitivity ($S_t$), ranging from 5 to 9 at a location, vary in a manner similar to a well-defined trend of the properties. Based on the $I_{v0}$, recompression, and $C_c-e_0-S_t$ relation, the clay is moderately or highly structured but weakly bonded, where $C_c$ is compression index and $e_0$ is initial void ratio.
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