Adjustable slope according to the following two aspects: firstly with the intention of line selection. The slope of the line is compared with the slope of the line selection, and both of them should be basically consistent. If there is out of the actual situation or inconsiderate phenomenon, it should be a comprehensive analysis, find out the reasons, decide the balance, control of technical standards. A detailed examination of the design, the maximum longitudinal slope and slope length limit, longitudinal slope reduction and flatlinear combination is in conformity with the technical standards, and pay special attention to the steep and flat curve, vertical and horizontal curve, bridge connection, route intersection, tunnel and ferry terminal where the slope is reasonable, identify problems and timely adjustment.The method of adjusting the slope line has the elevation, the reduction, the extension, the shortening, the longitudinal slope line and the increase, reduces the longitudinal gradient and so on. The adjustment should be based on the principle of less out of control points and less variation of filling and digging, so that the adjustment of the longitudinal slope is basically consistent with that of the trial.
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