摘要: |
MEASUREMENTS AND CONTROLS ARE TO BE UNDERTAKEN ON THREE BRIDGES WHICH ARE TO BE INSTALLED BY LAUNCHING; THE AIM IS TO PROVIDE DATA FOR RECOMMENDATIONS FOR THE LAUNCHING PROCEDURE. THE LAUNCHING METHOD HAS PROVED ECONOMICAL, PARTICULARLY FOR HIGH VALLEY BRIDGES, AND HAS GREATLY CONTRIBUTED TO THE REDUCTION OF BRIDGE CONSTRUCTION COSTS. WITH HIGH VALLEY OVERPASSES WHICH HAVE NATURALLY LARGE SPANS, THE LAUNCHING METHOD OFFERS STILL FURTHER WAYS OF REDUCING COSTS. IN THIS RESPECT THE WARTH VALLEY BRIDGE IS PARTICULARLY IMPORTANT; THIS HAS SPANS OF 67 M. AS RELIABLE INFORMATION CAN ONLY BE OBTAINED FROM FULL SCALE TESTING IT IS NECESSARY TO CARRY OUT STUDIES AND MEASUREMENTS ON CONCRETE STRUCTURES. CONTROL MEASUREMENTS ARE BEING UNDERTAKEN WHICH WILL BE OF GENERAL SIGNIFICANCE FOR FURTHER CONSTRUCTION WHERE THE LAUNCHING PROCEDURE IS USED. |