Design of high-speed railway (hsr) long-distance tunnel independent control network

Anotace: Establishing a high-speed railway long-distance tunnel independent control network according to “one point and one direction” will often produce lateral deviation and long and short chains in the joint section. It is necessary to take technical measures such as control network rotation or long and short chain to solve. Combined with the case of a network of independent control network for a long-distance tunnel of a high-speed railway in China, based on the results of the original reference ellipsoid and line control points, the central meridian (L 0) of the tunnel project center with the longitude of the tunnel is plotted, and the average tunnel elevation of the tunnel is Projection earth height (H 0), coordinate transformation calculation and relative stability and reliability analysis of existing line plane control points; select one stable control point of tunnel entrance and exit as starting point, in new projection parameters (L0 Under H0), the overall adjustment is carried out to establish an independent control network for the long tunnel. The results show: Zobrazit více »