Railway bridge construction progress and resource allocation automatic optimization method based on BIM

The invention relates to a BIM-based railway bridge construction progress and resource allocation automatic optimization method. An existing railway bridge design method cannot achieve automatic optimization of construction organizations. The method comprises the following steps: constructing a bridge BIM model, and endowing bridge address information and engineering information; establishing a construction progress general index database and a configuration resource database which correspond to each other, and endowing the bridge with a BIM model; according to the sequence of the beam part, the abutment body and the foundation, the total construction period under the initial resource allocation condition is calculated; checking whether the total construction period meets the requirement of the planned total construction period or not, if not, selecting the working procedure with the minimum resource allocation, improving the resource allocation, and calculating the total construction period ...