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Indexing the engineering properties of residual soils in the southern slopes of Mashhad,NE Iran

Journal of Mountain Science 2020年第9期17卷 2179-2202页

作者： Saeedeh HOSSEINI Gholam Reza LASHKARIPOUR Naser HAFEZI MOGHADDAS Mohammad GHAFOORI Department of Geology Payame Noor UniversityPo Box 19395-3697TehranIran Department of Geology Faculty of ScienceFerdowsi University of MashhadMashhadIran

Residual soils are weathering products of rocks that are commonly found under unsaturated *** properties of residual soils are a function of the degree of weathering.A series of index properties,engineering properties and geophysics survey examinations were performed on residual soils from two major geological formations in *** the present research,the index properties of residual soils in the south of Mashhad city in Iran are *** and artificial trenches were analyzed for evaluating the weathering profiles and collecting soil *** and undisturbed samples were obtained from each of the soil profile horizons resulting from weathering of different parent ***,physical properties and mechanical properties of the soil samples were determined in accordance with ASTM ***,the mineralogical composition,chemistry,and texture of the soil were evaluated in 51 *** field observations showed the difference in the weathering profile of residual soils deposited on various rocks(igneous,sedimentary,and metamorphic).These profiles mainly consisted of two horizons includingresidual soil on top and saprolite at the *** results of laboratory tests and geotechnical data showed that the properties of residual soil samples change by ***,depending on the type of origin rock,the properties are different in various types of residual *** most of the samples,the moisture content of soil horizons was also increased by *** on the unified soil classification(USCS),the soils of the upper horizons appeared to be classified as ML(Lean silt)and CL(Lean clay)while the soils of the lower horizons(saprolite zone)fall in SC(clayey sand),SM(silty sand),and SW(wellgraded sand)***,the results demonstrated that the particle size of the soil was increased by *** of results of the geotechnical tests showed that properties of residual soils are changed by variations of depth,weat

关键词： Residual soil Rock weathering geomechanical characteristics Mashhad City

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