The quality control of double-deck large-tonnage trussed beam installation is also one of the major difficulties of the project.
双层大吨位桁车梁的安装质量控制也是本工程的重难点之一。
2
The gait-model bridge girder erection machine mainly applied to the erection of long-span, large-tonnage and double amplitude bridge deck concrete full-span box girders.