China's first "four-car simultaneous movement" cross-railway rack dismantling process was successfully implemented at Chongqing Science City Station

China News Service, Chongqing, October 4 (Jia Nan Yin Xionghui) On the 3rd, at the Chongqing Science City Station of the Chengdu-Chongqing Middle Line High-speed Railway constructed by China Railway Construction Group, with the successful dismantling of the last shell rack, the country's first "four-car synchronized" cross-rail rack dismantling process was successfully implemented, providing valuable experience for subsequent similar cross-rail rack dismantling construction.

The Chongqing Science City Station of the Chengdu-Chongqing Middle Line High-speed Railway is located in Shapingba District, Chongqing. The station building area is 19,300 square meters and the parking lot has 2 units and 6 lines. The Zhanxi 2nd Road Bridge under construction this time has a total length of 117.5 meters and a total width of 51 meters.

"The working conditions of this demolition operation are complex and difficult to control. Since the truck crane cannot enter under the bridge, traditional lifting and dismantling methods are not suitable. In addition, the track is in a curve section, and the multi-lifting point operation requires high precision control standards for the demolition construction." Kang Kuanbin, head of the Station Building 1 Project Department of the Chongqing Section of the Chengdu-Chongqing Middle Line of China Railway Construction Group, said.

It is reported that the construction area of ​​this demolition operation spans the existing railway lines, and the conventional lifting and demolition plan does not meet the conditions for implementation. In order to solve the problem of dismantling, the project team innovatively adopted a three-step construction method of "hydraulic lifting and falling beam + trolley translation transfer + off-site lifting and dismantling in groups", creating the first synchronous control technology of four vehicles. This construction method has obvious effects on improving quality, efficiency and zero-interference construction. It only takes about 1 hour to dismantle and transport a single set of shell racks. The dismantling process of 8 sets of circulating cores only takes up 3 days on the line, saving about 28 days in construction time compared with the traditional solution.

Huang Chenghua, commander of the Dazu Headquarters of Chongqing Co., Ltd. of the Yangtze River Coast Railway Group, said that at present, the demolition construction of the large-span baileys in the cross-line area of ​​Chongqing Science City Station has been completed. The project has entered the decoration and decoration finishing and final sprint stages. It is expected to reach the conditions for full debut by the end of October. Once completed and opened to traffic, the time and space distance between Chongqing and Chengdu will be greatly shortened, and the formation of a "one-hour commuting circle" between the two places will be accelerated.