Developing the Rule of Thumb for Evaluating Penetration Rate of TBM,Using Binary Classification     

Akbarzadeh  Mohammadreza  Shaffiee Haghshenas  Sina  Jalali  Seyed Mohammad Esmaeil  Zare  Shokrollah  Mikaeil  Reza 《Geotechnical and Geological Engineering》2022,40(9):4685-4703

Geotechnical and Geological Engineering - Using the tunnel boring machine (TBM) in tunneling projects contributes significantly to increased efficiency and reducing the time of project...  相似文献   

Appraisal of Anchor Arrangement and Size on Sand-Geogrid Interaction in Direct Shear     

Abdi  Mahmood Reza  Chafjiri  Mehdi Pour-Ramazan 《Geotechnical and Geological Engineering》2022,40(9):4761-4773

Geotechnical and Geological Engineering - Soil–reinforcement interaction is a major factor in the analysis and design of reinforced earth structures. In current research the effects of...  相似文献   

Optimization of Gravity Concrete Dams Using the Grasshopper Algorithm (Case Study: Koyna Dam)     

Seifollahi  Mehran  Abbasi  Salim  Abraham  John  Norouzi  Reza  Daneshfaraz  Rasoul  Lotfollahi-Yaghin  Mohammad-Ali  Alkan  Ahmet 《Geotechnical and Geological Engineering》2022,40(11):5481-5496

Geotechnical and Geological Engineering - The aim of this study is to optimize the geometric dimensions of the Koyna concrete weight dam with and without seismic forces using the grasshopper...  相似文献   

Effect of Pile Driving on Ground Vibration in Clay Soil: Numerical and Experimental Study     

Noori  Hirad Shamimi  Shirinabadi  Reza  Moosavi  Ehsan  Gholinejad  Mehran 《Geotechnical and Geological Engineering》2022,40(4):2051-2062

Geotechnical and Geological Engineering - In this study, peak particle velocity (PPV) values for driving three piles with diameters of 40 cm, 50 cm, and 70 cm in a clayey...  相似文献   

Application of Leeb Hardness Test in Prediction of Dynamic Elastic Constants of Sedimentary and Igneous Rocks     

Ghorbani  Sasan  Hoseinie  Seyed Hadi  Ghasemi  Ebrahim  Sherizadeh  Taghi 《Geotechnical and Geological Engineering》2022,40(6):3125-3145

Geotechnical and Geological Engineering - The Leeb hardness test is a non-destructive and portable technique that can be used both in the laboratory and in-field applications. The main purpose of...  相似文献   

Formation and growth of multiple,distinct ice lenses in frost heave     

Hao Gao  Seyed Ali Ghoreishian Amiri  Signe Kjelstrup  Gustav Grimstad  Benoit Loranger  Elena Scibilia 《国际地质力学数值与分析法杂志》2023,47(1):82-105

This paper presents a fully coupled thermo-hydro-mechanical (THM) model which simulates frost heave in fully saturated soils. The model is able to simulate the formation and growth of multiple distinct ice lenses. The basic equations of the system were derived using the continuum theory of mixtures, nonequilibrium thermodynamics, and fracture mechanics, considering skeleton deformation, water flow and heat transport. Central to this model is the coupled transport of mass due to the temperature gradient across the frozen fringe, which acts as the main driving force of the phenomenon. The model is formulated in terms of measurable physical properties and thus no ad hoc parametrization is required. In an ice-lens-free state, the system is solved as a continuum using the finite element method (FEM). It is then locally treated as a discontinuous system upon the formation of ice lens, by enriching the elements carrying the embedded ice lens(es) using the extended finite element method (X-FEM). The accuracy and efficiency of the proposed model has been verified using several laboratory tests on Devon silt samples at different overburden pressures and thermal boundary conditions. Shut-off pressures have been also estimated and compared with the experimental results.  相似文献   

Water and sediment quality parameters in the Chalan Beel,the largest wetland of Bangladesh     

Md. Abu Sayeed  Mostafa Ali Reza Hossain  Md. Abdul Wahab  Md. Tawheed Hasan  Kumar Das Simon  Sabuj Kanti Mazumder 《中国海洋湖沼学报》2015,33(4):895-904

A study was conducted to investigate the status of the water and sediment quality in the Chalan Beel——a major fresh water fish reservoir of the country for a period of one year from July 2007 to June 2008. The mean values of water quality parameters(depth: 214.73±152.22 cm, temperature 27.68±4.26℃, transparency 123±82 cm, p H 9.7±0.47, total alkalinity 137±42 mg/L, conductivity 307±147 μs/cm, total dissolved solids 183±89 mg/L, ammonia-N 0.27±0.39 mg/L, nitrate-N 0.09±0.07 mg/L, phosphate-P 2.01±2.53 mg/L) and sediment quality parameters(p H 7.21±0.35, organic matter 2.59±0.52%, total nitrogen 0.09±0.04%, available phosphorus 5.4±3.6 Meq./100 g and exchangeable potassium 0.43±0.14 Meq./100 g) were within the range recommended for most of the inland fishes of Bangladesh. Although the water and sediment quality parameters except ammonia and phosphate are in the suitable range, the overall results suggest that better management techniques should be practiced in order to overcome the declining trend of associated aquatic life(fauna and flora) of this important fresh water body of Bangladesh.  相似文献   

The Importance of Geochemical Parameters and Shale Composition on Rock Mechanical Properties of Gas Shale Reservoirs: a Case Study From the Kockatea Shale and Carynginia Formation From the Perth Basin,Western Australia   总被引：1，自引：0，他引：1  

Mohammad Mahdi Labani  Reza Rezaee 《Rock Mechanics and Rock Engineering》2015,48(3):1249-1257

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An integrated assessment of soil erosion dynamics with special emphasis on gully erosion in the Mazayjan basin,southwestern Iran     

Zakerinejad  Reza  Maerker  Michael 《Natural Hazards》2015,79(1):25-50

Soil erosion by water is a significant problem in arid and semi-arid areas of large parts of Iran. Water erosion is one of the most effective phenomena that leads to decreasing soil productivity and pollution of water resources; especially, in the Mazayjan watershed in the southwest of Fars Province gully erosion contributes to the sediment dynamics in a significant way. Consequently, the intention of this research is to identify the different types of soil erosion processes acting in the area and to assess the process dynamics in an integrative way. Therefore, we applied GIS and satellite image analysis techniques to derive input information for the numeric models. For sheet and rill erosion the Unit Stream Power-based Erosion Deposition Model (USPED) was utilized. The spatial distribution of gully erosion was assessed using a statistical approach, which used three variables (stream power index, slope, and flow accumulation) to predict the spatial distribution of gullies in the study area. The eroded gully volumes were estimated for a 7-year period by fieldwork and Google Earth high-resolution images. Finally the gully retreat rates were integrated into the USPED model. The results show that the integration of the SPI approach to quantify gully erosion with the USPED model is a suitable method to qualitatively and quantitatively assess water erosion processes. The application of GIS and stochastic model approaches to spatialize the USPED model input yields valuable results for the prediction of soil erosion in the Mazayjan catchment. The results of this research help to develop an appropriate management of soil and water resources in the southwestern parts of Iran.  相似文献   

Facies Analysis and Sequence Stratigraphy of Silurian Carbonate Ramps in the Turan (Kopeh-Dagh) and Central Iran Plates with Emphasis on Gondwana Tectonic Event     

Zohreh NOWROUZI  Asadollah MAHBOUBI  Reza MOUSSAVI-HARAMI  Mohammad Hossein MAHMUDY GHARAIE  Farzin GHAEMI 《《地质学报》英文版》2015,89(4):1276-1295

Two sections from the Silurian deposits in the Central Iran Micro and Turan Plates were measured and sampled. These deposits are mostly composed of submarine volcanic rocks, skeletal and non-skeletal limestone, shale and sandstone that were deposited in low to high energy conditions (from tidal flat to deep open marine). According to gradual deepening trend, wide lateral distribution of facies as well as absence of resedimentation deposits, a depositional model of a homoclinal ramp was proposed for these deposits. Field observations and facies distribution indicate that, two depositional sequences were recognized in both sections. These sections show similarities in facies and depositional sequence during the Early Silurian in the area. Although there are some opinions and evidences that demonstrated Paleo-Tethys rifting phase started at the Late Ordovician-Early Silurian, similarities suggest that the Turan and Iran Plates were not completely detached tectonic block during this time, and that their depositional conditions were affected by global sea level changes and tectonic events.  相似文献