What is the main task of middle pile survey?

The main task is to measure the intersection, turning point, curve, straight line and horizontal curve of the highway without setting mileage stakes, and determine the mileage length of the route along the route, and finally mark the plane position of the highway center line with stakes in the field.

The specific work includes: 1, setting out, that is, putting the straight line between turning points on the drawing to the ground, calculating the length and rotation angle of each line segment in advance indoors according to the initial measuring traverse on the ground or the coordinates of turning points on the drawing, and determining the center line on the spot according to the calculated data; 2. Middle pile layout, that is, laying out 100m pile, adding pile, control pile and curve main point pile on the center line of the line, including measuring the straight line length of the line, laying out the curve in detail and setting up the center line pile according to the specified requirements.

The pile number measurement in highway is to determine the plane position of the center line of the route, which is the basis of cross-section measurement, longitudinal section measurement and strip topographic map measurement, and also the basis of design and construction lofting.