American Society of Civil Engineers

Drill and Blast Tunneling Practices

by Gerhard Girmscheid, (Prof., Inst. for Constr. Engrg. and Mgmt., Swiss Federal Inst. of Technol., Zurich, Switzerland) and Cliff Schexnayder, F.ASCE, (Eminent Scholar, Del E. Webb School of Constr., Box 870204, Arizona State Univ., Tempe, AZ 85287-0204)

Practice Periodical on Structural Design and Construction, Vol. 7, No. 3, August 2002, pp. 125-133, (doi:

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Document type: Journal Paper
Award Title: John O. Bickel Award, 2004
Abstract: High-performance drill and blast methods for tunnel construction require that each of the individual working elements that constitute the construction process are optimized and considered as a system of sequential and parallel activities. The advantage of integrating the logistic backup systems facilitates an increase in performance. To achieve increased production, it is necessary to improve the drilling, explosive loading, temporary ground support installation—rock bolts, steel mesh, shotcrete, steel sets, lagging, mucking, and logistics. Better blast techniques, partial robotilization, and integration of all systems and processes is also necessary.

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