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List of products by author: M. Sharifzadeh
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Design Optimization in a Conventional Tunnelling Project in Urban Area using the Observational Method-...
Abstract: The observational method as a practical engineering approach in tunnelling projects allows the designer to employ formal approaches towards design uncertainties by the installation of appropriate monitoring system and allows design optimization during construction. In this research, firstly characteristics, limitations, problems and hazards of Niayesh road tunnel project...
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Determining radius of influence of the face in EPB shield tunneling by finite difference method
Abstract: For the purpose of understanding the three-dimensional behavior of face tunnel, a three-dimensional finite difference simulation model, which includes all relevant shield tunneling components and allows for the modeling of the step-by-step construction process of the tunnel advance. The soil-structure interaction in shield tunneling is investigated by numerical solution. The results of...
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Effect of building’s geometrical Factors on the interaction of the tunnel-surface structures, the case of Niayesh...
Abstract: Population growth in most cities leads to increase in demand of implementing surface and subsurface infrastructures. Tunnel excavation causes the deformation in surface and subsurface infrastructures. In addition, existence of structures takes effect on the movements of ground which are occurred by the tunnelling. Therefore, evaluation of the interaction between tunnel and surface structures,...
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Estimation of Rock Load for Tunnels Excavated in Different Rock Masses
Abstract: Collapses in roof and less frequently in walls and face often take place due to inappropriate estimation of rock load. This study offers a review of the main factors affecting rock load to evaluate the capabilities of the existing models for prediction of ground pressure acting against installed support in underground excavations. Rock mass classifications such as GSI, RMR, as well as tunnel...
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Evaluation of tunnel instability in layered structures using physical modelling
Abstract: There is more probability to face with stratified structure in underground excavation procedures. Many reasons such as sedimentary layering, tensile jointing, and fabric created through metamorphic or igneous flow processes can create such structures []. Generally, stratified structures have continuously extended and they have a planar geometry. Moreover, this structures do not sustain tensile...
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Long-term stability analysis of tunnel lining in weak rocks using data from tunnel construction
Abstract: Time-dependent deformation of weak rocks has a significant effect on the stability of underground structures. Tunnel surrounding ground deformation in weak rocks may causes to gradual development of loading on the support system and threats the tunnel stability. In this research, the time-dependent behavior of the Shibli tunnel host rock was numerically...
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Numerical Modeling of Hydraulic Confinement around Crude Oil Storage Cavern in Fractured Rocks: Direct...
Abstract: Unlined rock caverns for hydrocarbon storage are mainly excavated in strong and stable rock masses with very low-permeable matrix, where hydrocarbon migration is only possible along fractures connected to the cavern boundaries and their networks. In this paper, the hydraulic confinement around a URC cavern was simulated by directly applying distinct fracture network...
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Numerical model for simulation of face seizure in EPB
Abstract: One of the main concerns in using a shielded machine in shallow soil tunnels is the possibility of the face seizure in soft ground. To realistically evaluate the possibility of face seizure in such grounds, the interaction between the soil and shield, lining and backfilling need to be understood. This paper will explain the background theories and the application of numerical analysis for 3D...
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Soil abrasiveness for EPB-TBM along Tehran metro tunnel line 7, Iran
Abstract: Full-face shielded tunnel boring machines (TBM) including earth pressure balance (EPB) shields have been used almost exclusively for soft ground tunneling because of the many advantages the offer in comparison to the conventional methods. The total number of EPB-TBMs that were utilized for tunneling between 2005 and 2010 is approximately 350 units worldwide as reported by [1]. These machines...
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The Role of Operational Factors on Water Inflow to Unlined Rock Caverns
Abstract: Widely utilization of large unlined rock caverns (URCs) located in water-bearing rock formations for hydrocarbon storage calls for more stringent hydrogeological precautions. Prediction of water inflow to the unlined caverns is one of such critical components faced by designers and hydrogeologist. Successful predictions of such issues require a thorough understanding of the physical processes...
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The Role of Operational Factors on Water Inflow to Unlined Rock Caverns
Abstract: Widely utilization of large unlined rock caverns (URCs) located in water-bearing rock formations for hydrocarbon storage calls for more stringent hydrogeological precautions. Prediction of water inflow to the unlined caverns is one of such critical components faced by designers and hydrogeologist. Successful predictions of such issues require a thorough understanding of the physical processes...
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Three dimensional numerical lining damage analysis under pore pressures 3D finite element model
Abstract: Segment is the basic structure unit of a shield tunnel. Lining is the main part of the segment. The mechanical behavior of the lining affects the form of reinforcement, the ratio of reinforcement and the cost of whole tunnel. Therefore, it is significant to clarify the mechanical behavior of lining in construction stage under pore pressures, which can save the engineering investment and...
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Underground Spaces Communication and Monitoring Systems integrated ZigBee and GIS
Abstract: Underground mine safety and health remain challenging issues in the mining industry. Death toll statistics in China’s coal mines have gradually reduced from 5798 to 2631 between 2000 and 2009 [1] but fatalities still occurs. The number of occupational mining fatalities in the United States’ underground metal mines has fluctuated from 40 to 46 during the years 2001 to 2010. Most importantly,...
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