id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
esrj-27199	Cardu, Marilena; Oreste, Pierpaolo	Tunnelling in urban areas by EPB machines: technical evaluation of the system	2011	7	.pdf	application/pdf	4850	220	51	When ç and instantaneous progression speed are known, a machine’s daily (24 hours) progression can be calculated as: v T v day total inst� � � �� 3 6. (13) where vday is daily advance rate (m/d), Ttotal is total working time (hours/day) and vinst is the net advance rate (mm/s). The evaluation was made by calculating excavation specific energies (during different excavation phases) to find a satisfactory correlation with the type of ground crossed.	cache/esrj-27199.pdf	txt/esrj-27199.txt