TBM Performance Analysis in Pyroclastic Rocks: A Case History of Karaj Water Conveyance Tunnel |
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| Authors: | J Hassanpour J Rostami Mashalah Khamehchiyan A Bruland H R Tavakoli |
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| Institution: | (1) Department of Engineering Geology, Tarbiat Modares University, Tehran, Iran;(2) Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, PA, USA;(3) Department of Civil and Transportation Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway;(4) SCE Company, Tehran, Iran; |
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| Abstract: | Karaj Water Conveyance Tunnel (KWCT) is 30-km long and has been designed for transferring 16 m3/s of water from Amir-Kabir dam to northwest of Tehran. Lot No. 1 of this long tunnel, with a length of 16 km, is under construction
with a double shield TBM and currently about 8.7 km of the tunnel has been excavated/lined. This paper will offer an overview
of the project, concentrating on the TBM operation and will review the results of field performance of the machine. In addition
to analysis of the available data including geological and geotechnical information and machine operational parameters, actual
penetration and advance rates will be compared to the estimated machine performance using prediction models, such as CSM,
NTNU and QTBM. Also, results of analysis to correlate TBM performance parameters to rock mass characteristics will be discussed. This involves
statistical analysis of the available data to develop new empirical methods. The preliminary results of this study revealed
that the available prediction models need some corrections or modifications to produce a more accurate prediction in geological
conditions of this particular project. |
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