To install the crane span before installation, camber, level of metal structure of main girder bending, trolley rail height difference, gauge deviation, diagonal bridge survey.
A new technique is put forward that high-low brace gantry crane wide double guiding girder method to construct bridge.
本文提出了高低支腿龙门吊宽幅双导梁法这种新的桥梁工程施工方法。
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L single girder gantry crane is a bridge type, suitable for open storage for general cargo railway transport loading and unloading and lifting operations.