Quick measurement method for cambered-inward steel box arch bridge main arch rib segments

The invention discloses a quick measurement method for cambered-inward steel box arch bridge main arch rib segments. The quick measurement method includes the steps of S1, selecting and marking each segment measure point of one steel box arch rib; S2, defining a tangent line coordinate system for measurement of the arch rib of the bridge, and by taking the center of the main bridge as the originalpoint, the mileage direction as the x axis, the upstream-downstream direction as the y axis and the elevation direction as the z axis, arranging a total station at a guide control point which can sight the steel box arch rib; S3, mounting a first segment of the steel box arch rib; S4, mounting a second segment of the steel box arch rib, to be specific, roughly positioning the second segment of the steel box arch rib through a positioning device, arranging prisms at marked portions or all measure points of the steel box arch rib, finely adjusting mounting position of the second segment of thesteel box arch rib to a ce