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Marrapu Balendra M. Kukunuri Anjana Jakka Ravi S. 《Geotechnical and Geological Engineering》2021,39(8):5879-5894
Geotechnical and Geological Engineering - Evaluation of slope stability using conventional limit equilibrium methods is very time consuming and repetitive, while the use of simplified approaches... 相似文献
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Most of the ash produced all over the world is primarily disposed off by wet disposal method onto the ash ponds, which are occupying huge valuable lands. This disposal problem can be minimized by utilizing ash in large geotechnical earthworks. However, its use in earthquake prone areas requires thorough understanding of its liquefaction resistance and nature of development of excess pore pressures under dynamic loading conditions. Investigations have been carried out in this paper on the liquefaction behaviour of pond ash by conducting cyclic triaxial tests on inflow and outflow ash samples collected from two different ash ponds. Distinctly different liquefaction phenomenon was observed for the ash samples from inflow and outflow points of the same ash pond. Inflow samples exhibited higher cyclic resistance than outflow samples and their strengths were comparable with the natural sands. Further studies revealed that the influence of various factors on liquefaction susceptibility of both the types of ashes is similar to that of natural sands. 相似文献
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This paper studies the reliability of the calculated shear-wave velocity (\(V_{\mathrm{S}}\)) from different available \(V_{\mathrm{S}}\) and SPT-N correlations in terms of seismic site response analysis. In the present study, various \(V_{\mathrm{S}}\)–N correlations developed for different regions around the globe have been used to calculate the bound of \(V_{\mathrm{S}}\) variations with depth at three different sites in Kolkata city. This bound has later been used to generate the random \(V_{\mathrm{S}}\) profiles using the Monte Carlo simulation. Equivalent linear site response analysis has been performed to study the response of those generated profiles under different input motion excitations. Strong-to-weak ground motion records have been used for this purpose. The amplification spectra of the generated \(V_{\mathrm{S}}\) profiles using all soil types and specific soil-type \(V_{\mathrm{S}}\)–N correlations show significant variations. The study also shows that the \(V_{\mathrm{S}}\)–N correlation may result in quite different \(V_{\mathrm{S},30}\) values and subsequently it may lead to the different site classes according to the NEHRP 2003 classification. So, the random choice of the \(V_{\mathrm{S}}\)–N correlation, where the direct measurement of \(V_{\mathrm{S}}\) is not available, may affect the outcome of seismic hazard analysis significantly. The study points out the need for accurate estimation of the \(V_{\mathrm{S}}\) profile either from in-situ determination or using site-specific correlation. 相似文献
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Shear Behaviour of Loose and Compacted Pond Ash 总被引：1，自引：0，他引：1
Massive utilization of pond ash in earth works requires thorough understanding of its geotechnical characteristics, especially
strength characteristics. Here in this paper, a detailed experimental study carried on the strength and other geotechnical
characteristics of pond ash samples, collected from inflow and outflow points of two ash ponds in India, are presented. Strength
characteristics were investigated using consolidated drained (CD) and undrained (
[`(\textCU)] \overline{\text{CU}} ) triaxial tests with pore water pressure measurements, conducted on loose and compacted specimens of pond ash samples under
different confining pressures. Ash samples from inflow point exhibited behaviour similar to sandy soils in many respects.
They exhibited higher strengths than reference material (Yamuna sand), though their specific gravity and compacted maximum
dry densities are significantly lower than sands. Ash samples from outflow point exhibited significant differences in their
properties and values, compared to samples from inflow point. Shear strength of the ash samples from outflow point are observed
to be low, particularly in loose state where static liquefaction is observed. 相似文献
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