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Frough, Omid, Torabi, Seyed Rahman, Tajik, Majid. (1391). Evaluation of TBM Utilization Using Rock Mass Rating System: A Case Study of Karaj-Tehran Water Conveyance Tunnel (Lots 1 and 2). , 3(2), 89-98. doi: 10.22044/jme.2012.86
Omid Frough; Seyed Rahman Torabi; Majid Tajik. "Evaluation of TBM Utilization Using Rock Mass Rating System: A Case Study of Karaj-Tehran Water Conveyance Tunnel (Lots 1 and 2)". , 3, 2, 1391, 89-98. doi: 10.22044/jme.2012.86
Frough, Omid, Torabi, Seyed Rahman, Tajik, Majid. (1391). 'Evaluation of TBM Utilization Using Rock Mass Rating System: A Case Study of Karaj-Tehran Water Conveyance Tunnel (Lots 1 and 2)', , 3(2), pp. 89-98. doi: 10.22044/jme.2012.86
Frough, Omid, Torabi, Seyed Rahman, Tajik, Majid. Evaluation of TBM Utilization Using Rock Mass Rating System: A Case Study of Karaj-Tehran Water Conveyance Tunnel (Lots 1 and 2). , 1391; 3(2): 89-98. doi: 10.22044/jme.2012.86

Evaluation of TBM Utilization Using Rock Mass Rating System: A Case Study of Karaj-Tehran Water Conveyance Tunnel (Lots 1 and 2)

Journal of Mining and Environment
مقاله 3، دوره 3، شماره 2، مهر 2012، صفحه 89-98    اصل مقاله (649.93 K)
نوع مقاله: Case Study
شناسه دیجیتال (DOI): 10.22044/jme.2012.86
نویسندگان
Omid Frough1؛ Seyed Rahman Torabi* 2؛ Majid Tajik3
1Shahrood University of Technology
2Shahrood Uni. of Technology
3SCE
چکیده
Successful application of a TBM in a project requires investigating both the ground conditions and the machine and backup system design features. Prediction of the machine performance is very important as it has a big effect on the duration of the project and the costs. In this respect, both penetration rate and advance rate must be estimated. Utilization factor, which depends on the type of operation, management, maintenance, geological conditions, mucking delays and other downtimes, correlates the advance rate and penetration rate. Adverse rock mass conditions such as mixed face condition, water problem and instability of rock have a great role in TBM downtimes and reduce the machine utilization considerably.
Based on  detailed engineering geological reports and maps and daily site reports taken from Karaj-Tehran Water Conveyance Tunnel ( Lots 1 and 2), this paper evaluates, main rock mass properties utilized for the estimation of TBM performance and discusses their effect on the machine utilization. . More specifically it uses the developed database also contains daily boring time, different rock mass related downtimes, daily advance and length of bored tunnel in each engineering geological units. It is concluded that the percentage of the rock mass related downtimes can be estimated via RMR within reliable coefficient of determination.
کلیدواژه‌ها
Ground conditions؛ RMR؛ Utilization؛ TBM downtimes؛ Karaj water conveyance tunnel
آمار
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