The cross section refers to the cross section of the pile passing through the center line perpendicular to the direction of the center line. The cross section measurement is to measure the ground elevation at the center pile perpendicular to the direction of the center line (the direction of the normal line). When measuring the cross section, first measure the direction of the cross section, and then measure the direction of the cross section. In this direction, the distance and height difference between the ground change points on both sides of the centerline pile and the pile point are measured to draw a cross-sectional view.
