Study on fractal dimensions of the silty soil around the tunnel under the subway loading in Shanghai

Based on the global digital systems, by fully considering the factors of the accumulated deformation, such as the frequency, the dynamic stress amplitude as well as the consolidation ratio, the mercury intrusion test was conducted to quantitatively study the microstructures of the silty soil around...

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Bibliographic Details
Published in:Environmental earth sciences 2013-07, Vol.69 (5), p.1529-1535
Main Authors: Yan, Chun-Ling, Tang, Yi-Qun, Liu, Yu-Ting
Format: Article
Language:English
Subjects:
Biogeosciences
Consolidation
correlation
Correlation coefficient
Deformation
Dynamic tests
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Engineering geology
Environmental Science and Engineering
Exact sciences and technology
Fractal analysis
fractal dimensions
Fractals
Geochemistry
Geology
Hydrology/Water Resources
Mathematical models
Mercury
Original Article
Silty soils
Soil mechanics
Soils
Stress analysis
Subway tunnels
Subways
Surficial geology
Terrestrial Pollution
Tunnels
Tunnels (transportation)
vibration
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Summary:Based on the global digital systems, by fully considering the factors of the accumulated deformation, such as the frequency, the dynamic stress amplitude as well as the consolidation ratio, the mercury intrusion test was conducted to quantitatively study the microstructures of the silty soil around the tunnel near the Guoquan station of line No. 10 Subway in Shanghai. The thermodynamic model was used to calculate fractal dimensions in the analysis of the mercury intrusion data. The results show that the relationship of ln(W ₙ /r ₙ ² ) and lnQ ₙ was a significant linear correlation and the correlation coefficient is over 0.98. The relationship between the fractal dimensions and the frequency, the dynamic stress amplitude as well as the consolidation ratio was analyzed; the variation law of the residual strain with the fractal dimensions was obtained. The study offers the theoretical support for damage mechanics, the subway axial deformation and the ground settlement under the subway vibration loading.
ISSN:1866-6280
1866-6299
DOI:10.1007/s12665-012-1987-2