پديد آورنده :
احمدي، فاطمه
عنوان :
بررسي پايداري رسوبات آبرفتي يال چپ مخزن سد مخزني بهشت آباد به روش استاتيكي شبه استاتيكي و ديناميكي
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده معدن
صفحه شمار :
ده، 156، [II] ص.: مصور، جدول، شكل، نقشه﴿رنگي﴾، نمودار
استاد راهنما :
حميد هاشم الحسيني، محمود هاشمي اصفهانيان
استاد مشاور :
بابك ابراهيمي
توصيفگر ها :
ضريب زلزله , كوه ها , تپه-ماهورها , دشت ها , رودخانه ها , المان بندي , معيار همگرايي , ميرايي مكانيكي، رايلي
استاد داور :
محمود وفائيان، لهراسب فرامرزي
تاريخ ورود اطلاعات :
1396/10/27
چكيده فارسي :
به فارسي و انگليسي:قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Abstract The slope stability is an important and applied subject in the content of rock and soilmechanics The calculation of overall safety factor for slopes embankments and abutmentsis considered in various development projects The classical slope stability methodsincluding swidish circle method were proposed in early 20th century The methods do notfully satisfy the equilibrium conditions Therefore some assumptions have to be made forthe relations between the interslice forces The limit state equilibrium may not yield theexact result due to facts such as soil inhomogeniety error in assuming the slip surface andgroundwater condition etc These methods also does not consider factors such as plangeometry of slopes definition of groundwater due to flow analysis insitu stress insimaltaneous failure etc which have great influence on the slope stability The numericalmethods such as finite element and finite difference method were developed to cover theinabilities and limitations of the classical methods The stresses bending moments andpore pressures could be estimated using the numerical methods in various points of naturalslopes and embankments The methods also consider the history of stress and strains andthey are able to simulate the soil behaviour during construction and post constructionstages in which many important circumstances such as consolidation swelling and porepressure dissipation were happened The method have yielded the satisfactory results in thestudy of probable failure hydraulic fracturing local failure and overall slope stability Thecurrent research work contains case study on the stability of left side of Beheshtabadstorage dam reservoir located 5 Km northwest of Ardal Chaharmahal province usingnumerical methods This side of reservoir includes thick alluvial deposits In case of theinstability a 25 m high dyke as a part of dam structure may built on this side to prevent thewater leakage This thesis intends to investigate the potential landslide in the alluvialdeposits over which the dyke is planned to be built using three types of loading i e static pseudo static and dynamic Firstly the 3 dimensional slopes stability is conducted usingthe FLAC3D software with static loading The collapsed area distinguished by the 3Danalysis has been again analyzed by the PLAXIS software as 2 D section The results of2D analysis show good agreement with the 3D outputs The failure happens either in themiddle or the lower parts of the slope The deposits earby or around the dyke may not havepotential failure The results of the dynamic stability analysis using the values of criticaldamping coefficient showed that the landslides may happen in downstream slope wellaway from the dyke If the damping ratio is taken as 3 the middle part of the abutmentmay also become unstable
استاد راهنما :
حميد هاشم الحسيني، محمود هاشمي اصفهانيان
استاد مشاور :
بابك ابراهيمي
استاد داور :
محمود وفائيان، لهراسب فرامرزي
