Search Results - "Hamid Chakeri"

Effects of important factors on surface settlement prediction for metro tunnel excavated by EPB by Chakeri, Hamid, Ozcelik, Yılmaz, Unver, Bahtiyar

“…► Effective factors in surface settlement for metro tunnel excavated by EPB were investigated using different methods. ► Tunnel depth, overburden pressure,…”
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A New Equation for Estimating the Required Face Support Pressure in EPB Machine by Haji, Sadegh, Chakeri, Hamid

“…Tunnel face instability and the potential surface settlement are the most hazardous factors that should be considered in all tunneling methods applied in urban…”
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LABORATORY INVESTIGATION OF THE EFFECT OF SODIUM SILICATE AND BENTONITE ON THE MECHANICAL PROPERTIES OF THE GROUT BEHIND THE SEGMENT IN MECHANIZED EXCAVATION by Khoshzaher, Erfan, Khodaei, Samaneh, Chakeri, Hamid

“…Nowadays, the use of Tunnel Boring Machines (TBM) in tunnelling has increased in urban environments. One of the effective parameters in the excavation process…”
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Experimental and numerical investigation of the TBM disc cutter wear using a new tunnel boring machine laboratory simulator by Chakeri, Hamid, Darbor, Mohammad, Shakeri, Hadi, Mousapour, Hamid, Mohajeri, Vahid

“…One of the essential and practical issues on TBM performance is the wear during the excavation process of abrasive and resistant rock. The wear of the disc…”
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THE EFFECTS OF WATER CONTENT AND GRAIN SIZE ON THE CLOGGING AND ABRASIVITY OF FINE-GRAINED SOILS IN MECHANIZED EXCAVATION by Khoshzaher, Erfan, Chakeri, Hamid, Darbor, Mohammad, Shakeri, Hadi

“…Clogging during excavation is one of the common problems in mechanized excavation. Among the influential factors in clogging of the cutter head, we can mention…”
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THE PREDICTION OF EPB-TBM PERFORMANCE USING FIREFLY ALGORITHMS AND PARTICLE SWARM OPTIMIZATION by Khoshzaher, Erfan, Chakeri, Hamid, Bazargan, Shahab, Mousapour, Hamid

“…Penetration rate is one of the most important parameters in determining excavation time in tunnelling operations. Providing a prediction model or a…”
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Effect of soil conditioning on the permeability of coarse-grained soil in mechanized tunnelling by Salmanpour, Farjam, Chakeri, Hamid, Chehreghani, Sajjad, Soula, Hossein Azad

“…In coarse-grained soils, the reduction of soil permeability via conditioning can effectively prevent groundwater from entering the chamber, thus providing…”
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EXPERIMENTAL INVESTIGATION OF STEEL FIBERS’ EFFECT ON THE IMPROVEMENT OF MECHANICAL PROPERTIES OF CONCRETE SEGMENTAL LINING IN MECHANIZED TUNNELING by Chakeri, Hamid, Darbor, Mohammad, Maleki, Farid Sh, Minaee, Tohid

“…The lining system, used in tunnel boring machines, is made of precast concrete segments. The use of steel fibers in this kind of support system can not only…”
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Estimating Penetration Rate of Excavation Machine Using Geotechnical Parameters and Neural Networks in Tabriz Metro by Samaneh Khodaee Ashestani, Hamid Chakeri, Mohammad Darbor, Erfan Khoshzaher, Seyyed Shahab Eddin Bazargan

“…In this study, the penetration rate of the excavation machine in Tabriz Metro Line 2 using geotechnical parameters and neural networks is estimated. For this…”
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Numerical investigation into the effect of stepping on the circumferential joint in the precast tunnel segments under TBM thrust jacks by Karimi, Mohammad, Chakeri, Hamid, Namin, Farhad Samimi, Sharghi, Mohammad, Özçelik, Yilmaz

“…The mechanized tunnelling process is mainly coupled with precast concrete segments, which include segmental rings that they are placed in their place…”
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Investigation into the effects of two component grout properties on surface settlements by Sharghi, Mohammad, Chakeri, Hamid, Ozcelik, Yilmaz

“…Ground displacement is an inevitable problem in the excavation and construction of tunnels and underground spaces near the surface of the earth. In urban…”
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A new equation for estimating the maximum surface settlement above tunnels excavated in soft ground by Chakeri, Hamid, Ünver, Bahtiyar

“…Nowadays, due to urbanization and population increase, need for metro tunnels, has been considerably increased in urban areas. Common characterization of urban…”
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Investigation of the feasibility of using recycled steel fibers in tunnel lining segments by Sharghi, Mohammad, Chakeri, Hamid, Afshin, Hassan, Török, Ákos, Dias, Daniel

“…•Use of recycled steel fibers for tunnel lining segments.•Evaluation of usability of recycled fibers based on recommendations.•Estimation of thrust forces,…”
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Cracking Problems in the Segments of Tabriz Metro Tunnel: A 3D Computational Study by Dastjerdy, Behzad, Hasanpour, Rohola, Chakeri, Hamid

“…This paper presents numerical models of tunnel segments with respect to the steel rebars using a finite element method under TBM thrust jack referring to the…”
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Investigations on Geotechnical Aspects for TBM Specification on the Tabriz Metro Line 3, Iran by Barzegari, Ghodrat, Shayan, Fateme, Chakeri, Hamid

“…In order to perform a successful mechanized tunnelling, detailed surface and subsurface investigations on ground are key factors for proper TBM selection and…”
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Investigation of ground surface settlement in twin tunnels driven with EPBM in urban area by Chakeri, Hamid, Ozcelik, Yilmaz, Unver, Bahtiyar

“…Nowadays, with the increasing population of large cities, the need to expand public transportation, especially metro systems, is greatly increasing in urban…”
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Structural and environmental performance of recycled steel fiber reinforced concrete segment under the thrust force of the tunnel boring machine jacks by Sharghi, Mohammad, Afshin, Hassan, Chakeri, Hamid, Dias, Daniel, Török, Ákos

“…The present study evaluates the structural and environmental performance of recycled fibers as a low‐cost and eco‐friendly reinforcement of segmental tunnel…”
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Investigation of interaction Between Tabriz metro tunnels (lines 1, 2 and 3) by hossein mohammadpoor reyhan, Hamid Chakeri

“…Due to the development of metro lines, always the maintenance of buildings of injuries in urban environments is important, therefore, investigation of the…”
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Analysis of interaction between tunnels in soft ground by 3D numerical modeling by Chakeri, Hamid, Hasanpour, Rohola, Hindistan, Mehmet Ali, Ünver, Bahtiyar

“…Tunnels are increasingly being excavated in soft ground conditions when services are required in urban environments, and it is now common to have tunnels…”
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Investigation of Soil Conditioning Tests with Three-Dimensional Numerical Modeling by Pourmand, Salim, Chakeri, Hamid, Sharghi, Mohammad, Ozcelik, Yilmaz

“…Due to the diverse and complex structure of soil and the variety of foam-modifier materials that are used, it is difficult to provide a model to predict the…”
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