DOCUMENTATION OF AUSTRIAN ROAD TUNNELS AND COMPARISON WITH ROAD TUNNELS ABROAD FROM THE VIEWPOINT OF CONSTRUCTION, OPERATION AND ECONOMICS

DOKUMENTATION OESTERREICHISCHER STRASSENTUNNELBAUTEN UND VERGLEICH MIT AUSLAENDISCHEN STRASSENTUNNELN IN BAUTECHNISCHER, BETRIEBLICHER UND WIRTSCHAFTLICHER SICHT

ROAD TUNNEL CONSTRUCTION IS INCREASING IN IMPORTANCE BECAUSE OF THE VERY HIGH COSTS OF UNDERGROUND STRUCTURES. IMPROVED TUNNELLING TECHNOLOGY SHOULD RESULT IN CONSTRUCTION BEING CHEAPER WHILE MAINTAINING OPTIMUM TRAFFIC FLOW AND THE NECESSARY OPERATIONAL SAFETY. IT IS INTENDED TO CARRY OUT A DETAILED SURVEY OF THE LARGE ROAD TUNNELS UNDER CONSTRUCTION OR BUILT DURING THE LAST TEN YEARS IN AUSTRIA AND NEIGHBOURING COUNTRIES; THE SURVEY WILL TAKE ACCOUNT OF PLANNING PRINCIPLES, CROSS-SECTION, VENTILATION, LIGHTING, SAFETY DEVICES, AND EXPERIENCE GAINED DURING CONSTRUCTION AND OPERATION. THE CONSTRUCTION METHODS USED OR ANTICIPATED ARE TO BE DESCRIBED, AND, AS FAR AS POSSIBLE, A COMPARISON MADE OF PROJECTED AND ACTUAL COSTS AND REASONS GIVEN FOR EXCEEDING THE PROJECTED COSTS.