Environmental Impact of the Accumulation of Tunnel Excavated Soils of Isfahan Subway in Zaynel area (east of Isfahan)
Subject Areas :
Ali
Radhoosh
1
(Geology Department, Engineering Faculty, Islamic Azad university, Isfahan (Khurasgan) branch, Isfahan)
Abdolhosein
Kangazian
2
(Assistant Professor, Department of Geology, Faculty of Basic Sciences, Islamic Azad University, Isfahan Branch (Khorasgan), Isfahan)
Keywords: : Metro Tunnel Drilling, Pedogenic Processes, Morphogenic Processes, Environmental Geology, Zainel area,
Abstract :
This research has examined the changes that have been made as a result of accumulating the Isfahan subway tunnel excavated soils in the Zeinel area (at the east of Isfahan). The samples of the tunnel fresh excavated soils, of the accumulated soils, and of the natural soils in disposal area were taken, randomly. All the samples were sieved and to determine the percentage of drilling foam material, organic carbon percentage of some of them were analised. Elevation and geographic location of the sampling sites were also determined. the directions and speeds of strong winds that have blown in the east of Isfahan was obtained and ranked. Comparison of the granulometry analysis results of the mentioned soils showed that there are great differences between the mentioned criteria of the freshly excavated soils with natural soils and there are afew diffrences between the mentioned criteria of the accumulated soils with natural soils. These differences increase the permeability in the region and reduce the balance between the morphogenic-pedogenic processes.The topographic findings show that mainly accumulating soils in the region have somehow changed the topography of the area that will cause disruption the balance between the morphogenic and pedogenic processes and increase morphogenic processes. Also, the strong winds don't blow toward Isfahan, consequently the environmental hazards will not be created
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