TBM Excavation in Difficult Ground Conditions
Case Studies from Turkey
1. Edition November 2016
354 Pages, Hardcover
308 Pictures (20 Colored Figures)
The book demonstrates with case studies how the particular geotechnical conditions in Turkey influence the machine technology, to what extent advance rates are affected and what advance investigation and safety measures are necessary.
The book relates experience of TBM drives in difficult geology, making use of case studies from Turkey to demonstrate the influence of the local geotechnical conditions on the selection of a tunnel boring machine and the selection of tools. There is an extensive description how various geological phenomena, such as for example transition zones, dikes, rock discontinuities, blocky ground, squeezing ground, swelling clays and high strength and abrasive rocks, can reduce the advance rate and what countermeasures can be introduced. There is also a discussion of necessary advance probing and safety measures. Since the presented practical experience from Turkey can also be applicable for other tunnel projects in difficult geology, the book represents a valuable source of knowledge for every tunneler.
2 Geology of Turkey and Istanbul, expected problems, some cuttability characteristics of the rocks
3 Difficult ground conditions dictating selection of TBM type in Istanbul
4 Difficult ground conditions affecting the performance of EPB-TBMs
5 Selection of cutter type for difficult ground conditions
6 Effects of North and East Anatolian Faults on TBM performances
7 The effect of blocky ground on TBM performance and the mechanism of rock rupture
8 The effects of transition zones, dykes, fault zones and rock discontinuities on TBM performance
9 Squeezing grounds and their effects on TBM performance
10 Clogging of the TBM cutterhead
11 The effect of high strength rocks on TBM performance
12 The effect of high abrasivity on TBM performance
13 Effect of methane and other gases on TBM Performance
14 Probe drilling ahead of TBMs in difficult ground conditions
15 Application of umbrella arch in Kargi project
Prof. Dr. Hanifi Copur works as an academician in the Mining Engineering Department of the Istanbul Technical University. He is an expert for mechanical mining and tunneling and is a board member of the Turkish Tunneling Society.
Prof. Dr. Cemal Balci is professor at the Mining Engineering Department of Istanbul Technical University, and has worked on many national and international implementation and research projects concerning mechanized mining and tunneling technologies. He is a board member of the Turkish Tunneling Society.