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۱Proposing a New Approach to Assess Suffusion Phenomenon Based on Physical Properties of Soil
اطلاعات انتشار: هفتمین کنگره ملی مهندسی عمران، سال
تعداد صفحات: ۶
Suffusion is the moving of soil particles through the soil body. The grain size distribution and porosity of soils are the most important factors that influence on suffusion process. Up to now, many methods have been proposed to predict suffusion which the validation of them are less clear because most available criteria are based on tests on limited soils.In this research some exiting methods developed based on soil porosity have been investigated. Some samples of soil with different porosity and aggregation have been selected and suffusion possibility is estimated for them by use of the exiting criteria. Based on results, these methods are slightly unconservative to evaluate suffusion. Some samples are recognized stable, whereas they are experienced suffusion and vice versa. Finally, statistically analyses have been developed to modify these methods based on physical properties of soil.<\div>

۲Investigation of Slope Stability of Cutting in Clay
نویسنده(ها):
اطلاعات انتشار: دومین کنفرانس ملی توسعه علوم مهندسی، سال
تعداد صفحات: ۴
long–term stability of slopes in clay is an importantand challenging aspect of civil engineering. Determining of mainreason for instability is the first step to control the slopeinstability which can threat the performance of roads, railways,bridges, canals and so forth. Among different reasons ofinstability in clay excavations, delayed failure caused by softeningis the most important factor because of its destructive effectsafter passing some years on apparently stable slopes. Thus, inthis research, in addition to introduce delayed failurephenomenon, some examples damaged by this factor have beenmentioned, after that for more details fundamental reason of alandslide in a canal has been investigated in a case study. For thisreason, numerical study using Geo–Slope software has been doneto determine stability coefficient of cutting in two sides of canal.Finally, numerical analysis and available evidences showed theimportant factor for instability in one side of canal was related todelayed failure after passing more than forty years.<\div>
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