World Survey of Current Research and Development (1977) on Roads and Road Transport. Part II. A Report on the Design and Construction of Segmental Prestressed Concrete Bridges in Western Europe.

摘要

A study was made of segmental prestressed concrete box girder bridges in Western Europe. The study team met with representatives of prominent design and construction firms,as well as some Government agencies,to discuss current design and construction practice. The team visited the sites of numerous such bridges which were under construction as well as many which had been completed. This report covers the findings and impressions of the study team;including discussions of current construction techniques,design considerations,and production and erection considerations. The Appendix contains descriptive information on most of the bridges which were visited or discussed. It was observed that the technology for constructing segmental bridges has rapidly advanced over the past 10years. Initially such bridges were constructed using only the 'balanced cantilever'method. Now span-by-span,incremental launching ('Taktschiebeverfahren'),and progressive placing construction techniques are also used. With many of these methods either precast or cast-in-place concrete segments may be used;and occasionally both types of elements are used. Thus,there are now a variety of design concepts and construction methods which may be used to economically produce segmental bridges for almost all site conditions.