Assembly type channel arc top plate inner wall radius measuring and testing method

The invention relates to an assembly type channel arc top plate inner wall radius measuring and testing method. The assembly type channel arc top plate inner wall radius measuring and testing method includes the following steps of using a total station meter placed on a base plate to aim at a peak point A, a leftmost end point B and a rightmost end point C, measuring an angle alpha formed by an OA link line and an OB link line and an angle alpha formed by the OA link line and an OC link line through a measuring center O of the total station meter, repeatedly adjusting the position of the total station meter on the base plate to enable the angle alpha to equal the angle alpha so that the location of the total station meter on a medial axis of a channel is guaranteed, measuring a distance L between the measuring center O of the total station meter and a point A and a distance L between the measuring center O of the total station meter and a point B, and finally, substituting the measured alpha , the distance L