Rapid construction method for lightweight BIM model of beam bridge bottom structure

The invention discloses a beam bridge bottom structure lightweight BIM (Building Information Modeling) rapid construction method, which is characterized in that section point clouds of transverse and longitudinal sections of a beam bridge are acquired through multi-degree-of-freedom single-line laser, structural parameters are further automatically extracted, a road beam bridge bottom structure lightweight BIM is rapidly constructed, manual intervention is not needed in the implementation process, the speed is high, the cost is low, and the construction efficiency is high. The precision is guaranteed, and the method can be widely applied to the fields of bridge BIM model construction, bridge disease management and maintenance, bridge reinforcement and maintenance and the like. 本发明公开了一种梁桥梁底结构轻量BIM模型快速构建方法，本发明通过多自由度单线激光采集梁桥横纵断面的剖面点云，进一步自动提取结构化参数，快速构建公路梁桥梁底结构轻量BIM模型，实施过程无需人工干预，速度快，成本低，且精度有保障，可广泛应用于桥梁BIM模型构建，桥梁病害管养，桥梁加固维修等领域。