فهرس المقالات Engineering Geology

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  1 - The effect of engineering geology on the rock load and squeezing potential in Lot2 of Imamzadeh-Hashem tunnel
  Mohammad-Reza Baghban Golpasand Seyyed-Ghafour Alavi Amirhassan Rezaei
  10.30495/ijes.2020.673336
  The load entering from the ground surrounding on the tunnel’s lining is one of the effective parameters in the designation of a tunnel. The amount of this parameter, which is called Rock load in a rocky environment, depends on several factors such as the overburde أکثر

  The load entering from the ground surrounding on the tunnel’s lining is one of the effective parameters in the designation of a tunnel. The amount of this parameter, which is called Rock load in a rocky environment, depends on several factors such as the overburden thickness, geological and geomechanical conditions and the depth of tunnel. In the present study, the amount of rock load for the Lot 2 of Imamzadeh Hashem Tunnel (L2IHT) has been evaluated using various methods and the effect of geological characteristics of the rock units on the tunnel route has been investigated. For this purpose, different methods for estimating the rock load were introduced firstly, and then the amount of this parameter for the tunnel was estimated using these methods. To evaluate the thickness of the plastic zone around the tunnel, the numerical method, finite difference code of FLAC3D software, has been used. Comparison of the results obtained from different methods and their analysis indicates that the rock load applying from H-4 and H-10 rock units is more than the other units. This happens because of the specific geological characteristics of these rock units such as high degree of crushing due to the geological factors and being in the faulted zone. Therefore, it is required for the stronger lining of the tunnel in the range of these units. تفاصيل المقالة
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  2 - ویژگی ها و خصوصیات ژئو تکنینکی سنگدانه های مصرفی در سد کرخه
  رسول اجل لوئیان لیلا فاتحی
  سد خاکی کرخه واقع بر رودخانه کرخه در 25کیلومتری جنوب باختری شهر اندیمشک قرار دارد.حجم عظیم مصالح مصرفی در پوسته و بتنسرریز آن ، مطالعه سنگدانه های مصرفی را ضروری می سازد. در این مقاله سعی بر انجام مطالعات زمین شناسی و ژئوتکنیکی محدوده سـدو اطراف آن و بالاخص محل های بردا أکثر

  سد خاکی کرخه واقع بر رودخانه کرخه در 25کیلومتری جنوب باختری شهر اندیمشک قرار دارد.حجم عظیم مصالح مصرفی در پوسته و بتنسرریز آن ، مطالعه سنگدانه های مصرفی را ضروری می سازد. در این مقاله سعی بر انجام مطالعات زمین شناسی و ژئوتکنیکی محدوده سـدو اطراف آن و بالاخص محل های برداشـت مـصالح قرضـه گردیـده اسـت، ایـن مطالعـات شـامل زمـین شناسـی، زمـین ریخـت شناسـی،لیتواستراتیگرافی، زمین شناسی ساختمانی و منابع قرضه که مشتمل بر دانه بندی و طبقـه بنـدی و خـصوصیات فیزیکـی و شـیمیایی، آزمـونسلامت سنگ و آزمون لوس آنجلس مصالح مصرفی می باشد. با توجه به نتایج آنالیزهای XRFانجام شده بر روی مصالح قرضه کانی هـایکوارتز و کلسیت از درصد قابل توجهی برخوردار هستند که به لحاظ واکنش قلیایی- سیلیسی قابل ملاحظه می باشد تفاصيل المقالة
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  3 - Geotechnical-Geological studies and tunnel support design at Rudbar-Lorestan dam site, Iran
  Saeed Masoud Shamsoddin Parviz Maarefvandz
  This paper presents the results of engineering geological investigations and tunnel support design studies, carried out at the Rudbar-Lorestan dam site, center of Iran. The Rudbar-Lorestan dam is to be constructed in order to convey water for hydropower purposes. Studie أکثر

  This paper presents the results of engineering geological investigations and tunnel support design studies, carried out at the Rudbar-Lorestan dam site, center of Iran. The Rudbar-Lorestan dam is to be constructed in order to convey water for hydropower purposes. Studies were carried out both in the field and the laboratory. Field studies include engineering geological mapping, intensive discontinuity surveying and sampling for laboratory testing. Based on the results of the mapping carried out, the transfer tunnel path passes through argillaceous limestone and dolomitic limestone type of soil/rock. Empirical, analytical and numerical methods were combined for safe tunnel design. Rock mass rating (RMR), Rock mass quality (Q) and Geological strength index (GSI) systems were used for empirical rock mass quality determination, site characterization and support design. The convergence-confinement method was used as analytical method and software called Phase 2 , a 2D finite element program, was utilized as numerical method. The support system, suggested by empirical methods, was applied and the performance of suggested support system was evaluated by means of numerical modelling. It was concluded that the suggested support systems were adequate, since after applying the suggested support system to weak rock masses, tunnel deformation and the yielded elements around the tunnel decreased significantly. Thus, it is suggested that for more reliable support design empirical, numerical and analytical methods should be combined. تفاصيل المقالة
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  4 - Engineering Geology Characteristics of Zarani Dam Site (South East of Iran) Emphasis Seepage from Foundation and Abutments
  Mojtaba Ansarifar Jafar Rahnamarad Mahtab Aflaki
  Embankment dam of Zarani in the Hormozgan province is located 35 km southeast of Minab. Studied area is located in the western end of the Makran subduction zone. The main regional faulting systems near the site, is Minab- Zandan-Palami right- handed thrust system. The p أکثر

  Embankment dam of Zarani in the Hormozgan province is located 35 km southeast of Minab. Studied area is located in the western end of the Makran subduction zone. The main regional faulting systems near the site, is Minab- Zandan-Palami right- handed thrust system. The purpose of this study was to identify the geology, engineering geology of reservoir area, and foundation and fulcrum of dam, scrutiny and analysis discontinuities of rock mass, to determine joints and fractures, determine the permeability of dam structure (foundation and fulcrum) based on the results lugeon test and finally, offer suggestions for cut off dam. The research method includes first gather basic information and general research, and then field investigations were done and finally were analyzed data by the Stereonet, Stereograph and Dips software. The result of lugeon test showed penetration depth in the right, middle and left side are 45, 45 and 50 respectively, the slope of shale - sandstone layers of site is near vertical and the dip direction is the east to northeast. This condition of site formation has cut off rule, but it cause to seepage on the right shore of reservoir. In the right shore of the reservoir, shale layers were dominant and have folded out by the Zendan faults and has changed trend of the layers, which caused cut off in this area. The left and right abutment of structure, three sets of discontinuities crosscut the rock mass, according to the layering in these categories are with discontinuities, make most of potentially space to escape water, but because of vertical layers, this space has not noticeable effect on seepage. تفاصيل المقالة
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  5 - Application of nanoclay filter to permeability reduction for bed soil from industrial effluent transmission channels (Case Study)
  Bagher Jafari Karim Abbasian
  The presented article is attempted to use the nanoclay filter to provide the natural restrictor to prevent the spread of industrial effluents transmission channels related to Kaveh Soda company in Maragheh, northwest of Iran. For this purpose, a laboratory model has bee أکثر

  The presented article is attempted to use the nanoclay filter to provide the natural restrictor to prevent the spread of industrial effluents transmission channels related to Kaveh Soda company in Maragheh, northwest of Iran. For this purpose, a laboratory model has been designed to evaluate the performance ability of nanoclay filters to reduce soil permeability. In the experiment used 0%, 3%, 6% and 9% nanocaly contents specimens to create the filter columns which are performed by permeability test. In this test, the inlet fluid was the factory industrial effluent instead of water. According to the results, it can specified to the permeability coefficient was 3.18×10-4 cm/s (0% nanoclays) which decreased to 7.71×10-7 (9% nanoclays). This indicates the ability of the nano-filter to significantly reduce the permeability coefficient. تفاصيل المقالة
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  6 - Empirical stability classification of steeper slope design in Khoy Open-pit mining projects by using the SMR, Qslope and RMR methods
  Mir Akbar Seyed Hamzeh
  The presented article tried to utilize the empirical rock mass classifications to rock mass quantification and stability analysis for several open-pit mining projects in Khoy, West-Azerbaijan, NW of Iran. For this purpose, the geomechanical classifications including roc أکثر

  The presented article tried to utilize the empirical rock mass classifications to rock mass quantification and stability analysis for several open-pit mining projects in Khoy, West-Azerbaijan, NW of Iran. For this purpose, the geomechanical classifications including rock mass rating (RMR), slope mass rating (SMR), and Qslope have been used. The study aim is provide the quick assessment by considering these classifications to appropriate mines design and stability analysis which implemented on 20 open-pit mining cases in Khoy. Based on the results, it has been determined that most slopes are in the generally stable class, but some of the slopes show unstable conditions which stabilization is necessary. In the meantime, one slope is in an unfavorable condition. تفاصيل المقالة
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  7 - A Review Study for Rock Slope Stability Assessments and Stabilization Methods
  Narges Hayati
  10.30495/geotech.2021.686312
  Slope stability of rock structures considered as the most important field in rock mechanics. Stability analysis of the jointed rock slopes are evolved during many years. The different methods are developed to understand and analysis various rock failures and describe sl أکثر

  Slope stability of rock structures considered as the most important field in rock mechanics. Stability analysis of the jointed rock slopes are evolved during many years. The different methods are developed to understand and analysis various rock failures and describe sliding mechanism. The rock engineering experts in this field have provided significant achievements in terms of stability analysis and monitoring in jointed rock slopes and introduced extensive stability analysis and stabilization methods. The presented study is tried to prepare a review study on several works conducted on rock slope stability and stabilizations. In this regard, while examining the structured analysis of the stability of rocky slopes, some of the most important achievements in this field have been considered. تفاصيل المقالة