DESIGN OF HIGH-SPEED RAILWAY (HSR) LONG-DISTANCE TUNNEL INDEPENDENT CONTROL NETWORK

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:(1) The tunnel independent control network established by the method has high precision and uniform error, which can meet the requirements of network construction precision and improve the tunnel penetration accuracy;(2) “One point one direction” Compared with this method, the joint segment control point (S = 9.1 km) with the same baseline file, starting point and projection parameters, the maximum coordinate difference Δx is -63.4 mm, Δy is 85.3 mm, requiring technical processing;(3) The method can solve the problems of large lateral deviation and long and short chain of the connecting section, and ensure the smooth connection between the tunnel and the adjacent structure

THE MEASUREMENT OF HIGH-SPEED RAILWAY (HSR)-PRECISION ENGINEERING

The paper proposed the optimization of the network construction timing of the control network according to the specific conditions of the survey route. Moreover, presented here are the adjustments according to the layout requirements of the control network layout process, strengthening the control of the line level base point during the construction process. Several optimization solutions are discussed for the special design of the level control before the construction of the long tunnel. It has been explained the methodology to introduce new Continuously Operating Reference Station (CORS) technology in railway survey and design with appropriately adjustment of the position requirements of the control network according to the specification. In order to carry out the special design of the levelling route with precision, it is advisable to set a certain stable reference point in the level control of the long line. The proposed methodology can effectively solve some problems existing in the current high-speed railway construction process, and make the precision measurement control network better for survey, design, construction, supervision and operation

Optimization of the Synergies Between Preparation of High-Speed Railway Train Running Diagram and Station Route Allocation Plan

Introduction. Station route allocation plan is an important extension of the train running diagram and the both are closely intertwined so the overall research on the synergetic preparation method is more beneficial in improving the preparation quality of the train running diagram and providing better service for passengers. Therefore, the research topic has practical significance