Influence of petrographic parameters on geotechnical properties of tertiary sandstones from Taiwan

A preliminary analysis of failure mechanisms in karst and man-made underground caves in Southern Italy

“…For karst caves, the changes mainly depend on the chemo-mechanical processes inside the rock mass and therefore generally develop over the long term. For man-made caves, instead, failures frequently occur just few years after the end of the extraction works (Ryka and Werner, 1985;Smith and Rosenbaum, 1993;Bell and Genske, 2001;Hutchinson et al, 2002;Waltham and Swift, 2004;Castellanza et al, 2008), as a consequence of low strength of the rock involved, variations of the boundary conditions or loading conditions applied to the rock mass around the cave, creep phenomena, as well as degradation with time of the rock properties due to weathering processes (Fookes and Hawkins, 1988;Dyke and Dobereiner, 1991;GSE (Geological Society Engineering Group Working Party Report), 1995;Tugrul and Zarif, 2000;Zupan Hajna, 2003;Jeng et al, 2004;Andriani and Walsh, 2006;Ghabezloo and Pouya, 2006).…”

Drying-induced deformation behaviour of Shirahama sandstone in no loading regime

“…In addition, clay minerals present in sandstone matrix are still pivotal for weathering, and leaching of these minerals may account for deterioration induced by drying and wetting cycles. Jeng et al (2004) reported that tunneling through several sandstone strata in Taiwan suffered severe crown settlement due to deterioration. The deterioration effect of moisture occurs mainly during the drying phase, not in the wetting phase (Moropoulou et al, 2004;Karoglou et al, 2005).…”

Empirical relations between compressive strength and microfabric properties of amphibolites using multivariate regression, fuzzy inference and neural networks: A comparative study

“…In such, Tiryaki (2008) used quartz content, effective porosity and dry unit weight as parameters to estimate the UCS of rock using ANNs and regression tree techniques. Similarly, Jeng, et al (2004) determined that percentages of quartz and feldspar content affect the macroscopic mechanical behavior of sandstones. Singh et al (2001) constructed ANN model to estimate UCS from mineral composition and textural properties for some schistose rocks.…”