Volume 6, Issue 1 (11-2012)
2012, 6(1): 1327-1350 |
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Afshar S, Ghafori M, Lashkaripur G, Arian M, Musavimadah M. Investigation of optimum depth for tunnel of Mashhad metro line 2. Journal of Engineering Geology 2012; 6 (1) :1327-1350
URL: http://jeg.khu.ac.ir/article-1-381-en.html
URL: http://jeg.khu.ac.ir/article-1-381-en.html
Abstract: (7506 Views)
With respect to development of underground structures and their high construction costs in intra- and inter-municipal transportation, it is necessary to study the stability of such structures. In this research, tunnel stability of Mashhad Metro line 2 with 17 km length is studied. First, the type of sediments and geotechnical properties in Mashhad Plain are investigated. The SPT profiles were prepared using Rock Work 2006 software. The soil classification tests and XRD results show that the soils in this line are mostly clay such as Illite and Kaolinite types. Afterwards, because most of the soils in this line are characterized as fine grained, the ground settlement using PLAXIS V8 software was performed. According to the numerical modeling and the depth of tunnel, the optimum depth for tunnel was determined.
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