International Journal of Earth Sciences and Engineering

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Analysis on Compression Deformation of Remolded Loess Based on Secant-Modulus Method


Affiliations
1 College of Geology Engineering and Geomatics, Chang'an University, Xi'an, China
2 Survey and Design Research Institute of Hangzhou, Hangzhou, China
 

Relying on high loess fill engineering in the gully of Yan'an area, confined compression tests are carried out to study the compression deformation of remolded loess which includes both Q3 and Q2 loess. The effects of water content and dry density on the compression deformation are analyzed, and further analyses on the relationship between these effects and the initial water content, the initial dry density of soil samples are made. In addition, based on the compression stress-strain curves and secant modulus method for calculating foundation settlement, the settlement calculation models, which hold that the relationship between ps/εs and ps respectively accords with linear function, power function and quadratic parabola function, are established. The models are applied to the practical engineering. Compared with field monitoring data and calculated values by models for the settlement of fill foundation, it is known that for the remolded loess in this area, the models using linear fitting and quadratic parabola fitting of ps/εs-ps is more close to the actual. The research results can provide references for other similar projects.

Keywords

Remolded Loess, Compression Deformation, Settlement Calculation, Secant Modulus, Yan'an Area.
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  • Analysis on Compression Deformation of Remolded Loess Based on Secant-Modulus Method

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Authors

Wu Kai
College of Geology Engineering and Geomatics, Chang'an University, Xi'an, China
Ni Wan-Kui
College of Geology Engineering and Geomatics, Chang'an University, Xi'an, China
Liu Kui
College of Geology Engineering and Geomatics, Chang'an University, Xi'an, China
Shi Bo-Yi
Survey and Design Research Institute of Hangzhou, Hangzhou, China
Guo Ye-Xia
College of Geology Engineering and Geomatics, Chang'an University, Xi'an, China

Abstract


Relying on high loess fill engineering in the gully of Yan'an area, confined compression tests are carried out to study the compression deformation of remolded loess which includes both Q3 and Q2 loess. The effects of water content and dry density on the compression deformation are analyzed, and further analyses on the relationship between these effects and the initial water content, the initial dry density of soil samples are made. In addition, based on the compression stress-strain curves and secant modulus method for calculating foundation settlement, the settlement calculation models, which hold that the relationship between ps/εs and ps respectively accords with linear function, power function and quadratic parabola function, are established. The models are applied to the practical engineering. Compared with field monitoring data and calculated values by models for the settlement of fill foundation, it is known that for the remolded loess in this area, the models using linear fitting and quadratic parabola fitting of ps/εs-ps is more close to the actual. The research results can provide references for other similar projects.

Keywords


Remolded Loess, Compression Deformation, Settlement Calculation, Secant Modulus, Yan'an Area.