Geological strength index-slope: an adaptation of the geological strength index system for use in the rock slope stability assessment

IF 1.3 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Brazilian Journal of Geology Pub Date : 2023-05-05 DOI:10.1590/2317-4889202320220044

G. Hamasur

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引用次数: 0

Abstract

Abstract The Geological Strength Index (GSI) system is the basis of parameters used in the Hoek-Brown failure criterion for rock mass strength estimation. The author tested this system and here suggests a modified GSI called Geological Strength Index-slope (GSIslope). The modified system combines two different existing approaches: the GSI system and Slope Mass Rating (SMR). The purpose of GSIslope is to allow engineering geologists to quickly evaluate the stability of natural and excavated slopes or open-pit mining in the field. GSIslope is computed by subtracting a constant value of 10 and the multiplication of adjustment factors for discontinuity orientation and slope (F1, F2, and F3, based on the parallelism of discontinuity and slope, discontinuity dip angle, and the difference between the inclination angle of discontinuity and slope) from GSI, and adding field groundwater rating to it. Modified curves are also proposed in this work to determine the accurate ratings of the adjustment factors. The results of this work are compared to the values obtained from equations of continuous-SMR and SMR-value itself for both the adjustment factors and GSIslope values. The comparison showed that the proposed curves and GSIslope equation are valid and easy to use for estimating the adjustment factors’ ratings and GSIslope value.

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地质强度指标-边坡:对地质强度指标体系的改进，用于岩质边坡稳定性评价

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来源期刊

Brazilian Journal of Geology GEOSCIENCES, MULTIDISCIPLINARY-

CiteScore

3.20

自引率

7.10%

发文量

审稿时长

11 weeks

期刊介绍： The Brazilian Journal of Geology (BJG) is a quarterly journal published by the Brazilian Geological Society with an electronic open access version that provides an in-ternacional medium for the publication of original scientific work of broad interest concerned with all aspects of the earth sciences in Brazil, South America, and Antarctica, in-cluding oceanic regions adjacent to these regions. The BJG publishes papers with a regional appeal and more than local significance in the fields of mineralogy, petrology, geochemistry, paleontology, sedimentology, stratigraphy, structural geology, tectonics, neotectonics, geophysics applied to geology, volcanology, metallogeny and mineral deposits, marine geology, glaciology, paleoclimatology, geochronology, biostratigraphy, engineering geology, hydrogeology, geological hazards and remote sensing, providing a niche for interdisciplinary work on regional geology and Earth history. The BJG publishes articles (including review articles), rapid communications, articles with accelerated review processes, editorials, and discussions (brief, objective and concise comments on recent papers published in BJG with replies by authors). Manuscripts must be written in English. Companion papers will not be accepted.