Correlations between SPT,CPT, and Vs for Reclaimed Lands near Dubai     

Khan  Zahid  Yamin  Mohammad  Attom  Mousa  Al Hai  Nasser 《Geotechnical and Geological Engineering》2022,40(8):4109-4120

Geotechnical and Geological Engineering - Artificial islands near Dubai were constructed with geomaterials of significant gravel content from other areas of the United Arab Emirates (UAE). The...  相似文献   

Three-dimensional finite element analysis of spatially variable PVD improved ground     

Mohammad Wasiul Bari  Mohamed A. Shahin 《Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards》2015,9(1):37-48

A stochastic approach that investigates the effects of soil spatial variability on stabilisation of soft clay via prefabricated vertical drains (PVDs) is presented and discussed. The approach integrates the local average subdivision of random field theory with the Monte Carlo finite element (FE) technique. A special feature of the current study is the investigation of impact of spatial variability of soil permeability and volume compressibility in the smear zone as compared to that of the undisturbed zone, in conjunction with uncoupled three-dimensional FE analysis. A sensitivity analysis is also performed to identify the random variable that has the major contribution to the uncertainty of the degree of consolidation achieved via PVDs. The results of this study indicate that the spatial variability of soil properties has a significant impact on soil consolidation by PVDs; however, the spatial variability of soil properties in the smear zone has a dominating impact on soil consolidation by PVDs over that of the undisturbed zone. It is also found that soil volume compressibility has insignificant contribution to the degree of consolidation estimated by uncoupled stochastic analysis.  相似文献   

Can observational growth rate data favor the clustering dark energy models?     

Ahmad Mehrabi  Mohammad Malekjani  Francesco Pace 《Astrophysics and Space Science》2015,356(1):129-135

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Determination of Longwall Mining-Induced Stress Using the Strain Energy Method   总被引：3，自引：0，他引：3  

Mohammad Rezaei  Mohammad Farouq Hossaini  Abbas Majdi 《Rock Mechanics and Rock Engineering》2015,48(6):2421-2433

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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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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   

Joint Simulation of Grade and Rock Type in a Stratabound Copper Deposit     

Mohammad?Maleki  Xavier?EmeryEmail author 《Mathematical Geosciences》2015,47(4):471-495

This work deals with the joint simulation of copper grade (as a continuous regionalized variable) and rock type (as a categorical variable) in Lince–Estefanía deposit, located in northern Chile. The region under study is heterogeneous, containing three main rock types (intrusive, andesite and breccia bodies) with different copper grade distributions. To perform joint simulation, the multi-Gaussian and pluriGaussian models are used in a combined form. To this end, three auxiliary Gaussian random fields are considered, one for simulating copper grade, up to a monotonic transformation, and two for simulating rock types according to a given truncation rule. Furthermore, the dependence between copper grade and rock types is reproduced by considering cross correlations between these Gaussian random fields. To investigate the benefits of the joint simulation algorithm, copper grade and rock types are also simulated by the traditional cascade approach and the results are compared. It is shown that the cascade approach produces hard boundaries, that is, abrupt transitions of copper grades when crossing rock-type boundaries, a condition that does not exist in the study area according to the contact analysis held on the available data. In contrast, the joint simulation approach produces gradual transitions of the copper grade near the rock-type boundaries and is more suited to the actual data.  相似文献   

Earth pressure distribution behind rigid non-yielding walls under the effect of repeated loading on backfill     

Mohsen Kargar  S. Majdeddin Mir Mohammad Hosseini 《Arabian Journal of Geosciences》2015,8(2):839-847

One of the most important factors in optimized design of non-yielding retaining walls like basement walls and bridge abutments is to determine the exact variation of earth pressure acting on such walls. In this paper, the distribution of at rest earth pressure behind a laboratory model of a fixed and rigid retaining wall with a cohesionless dry backfill is measured under the effect of static and repeated loads. The same conditions of the experimental model are then simulated numerically with a two-dimensional finite-difference analysis computer code. For the purpose of model verification, the results of numerical model are compared to the results of the experimental model, which is similar in geometrical and geomechanical properties. Cyclic surcharges with different amplitudes and frequencies are applied in different distances from the wall, and the earth pressure distribution, the resultant force, and its point of application are investigated. The effect of soil and loading parameters on the at rest earth pressure is also evaluated, and a parametric study has been carried out. The results of model show a significant increase in the earth pressure due to cyclic loading compared to static loading, especially in the initial cycles of loading. It indicates that the effect of cycling nature of loading should be essentially taken into account in the design of retaining walls.  相似文献   

Interfacing the geographic information system,remote sensing,and the soil conservation service–curve number method to estimate curve number and runoff volume in the Asir region of Saudi Arabia     

Fawzi S. Mohammad  Jan Adamowski 《Arabian Journal of Geosciences》2015,8(12):11093-11105

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Effects of climate change on wind energy production in Iran     

Roshan  Gholamreza  Najafei  Mohammad Saeed  Costa  Ángel M.  Orosa  José A. 《Arabian Journal of Geosciences》2015,8(4):2359-2370

Arabian Journal of Geosciences - This study explores the effect of future climate change on wind energy conversion in Iran, based on data from existing wind farms. In an effort to estimate and...  相似文献