Railway electrification speed raising reconstruction engineering Construction technology summary
This section is the Z-16 section of the comprehensive project in front of the station of the electrification speed increase reconstruction project of Zhejiang Jiangxi Railway, from Quanjiang Station (not included) to the boundary with Guangzhou Railway Bureau, with a total length of 35.5km from DK851+200 to DK886+700. This section includes four intermediate stations, namely Baiyuan, Pingxiang North, Yaojiazhou and Dengxinqiao, spanning five sections. The designed double track speed from Quanjiang Station to Baiyuan Station is 200km/h, the designed double track speed from Baiyuan Station to Yaojiazhou Station is 120km/h, and the designed double track speed from Yaojiazhou Station to the local boundary is 200km/h. As Zhejiang Jiangxi Railway is one of the most important trunk lines of the road network in China, the traffic density is high, the transportation is busy, and the traffic interference is large. Several construction sections are close to the existing line, and the construction process is subject to the interference of the existing line. In this section, several double winding lines intersect the existing line, and temporary lines are newly built in the design, so that the operation line can be connected to the temporary line without interrupting the railway operation. Then carry out the engineering construction of the line intersection, and finally transfer the line. More houses are demolished from Yaojiazhou Station to Dengxinqiao Station, and the demolition workload is large. There are many sections crossing villages and farmland in this section, and the culverts are added densely. The culvert construction is greatly affected by farmland irrigation and agricultural roads. The water and electricity along the route of this section is convenient. The route is basically parallel to National Highway 320. The traffic is developed, the building materials are abundant, and the construction conditions are good. This section is a comprehensive project in front of the station, mainly including subgrade works, bridge and culvert works, tunnel works, track works and other comprehensive projects in front of the station. Main technical standard Railway grade: 200km/h mixed passenger and freight railway Number of main lines: double track limit gradient: 7.2 ‰ Minimum curve radius: 120km/h Section: 1200m in general, 800m in difficulties. 200km/h section: 3500m generally; Difficulty 2800m; Individual 2200m traction type: electric power. Locomotive type: EMU, six axle passenger car, eight axle freight car Traction weight: 4000t Effective length of arrival departure track: 850m