Curved variable cross-section fish belly type steel box girder making positioning measurement construction device and method

The invention provides a curved variable cross-section fish belly type steel box girder making positioning measurement construction device and method. The device comprises a measuring and positioningreference panel, two parallelly arranged sliding tracks are fixedly laid on the two sides of the positioning reference panel, mobile positioning measuring devices are installed on two sliding tracks respectively, and mobile positioning measuring devices comprise indium steel rulers and sliding and fixing devices making the indium steel rulers fixed to the sliding tracks, laser range finders are installed on the indium steel rulers, and the laser range finders are installed on the indium steel rulers through sliding clamps and can slide on the indium steel rulers. Accordingly, by means of the measurement device, locating points of all sections of the steel box girder are measured, three-dimensional curved surface data is checked and collected, and then precise location is ensured by combining a three-dimensional BI