Zhongnan company of China Railway Construction Group: high quality Xiangyang motor car

Today, the Han Shi high speed railway is officially open to traffic. In the evening, the high-speed railway that has been flying for a day will enter Xiangyang EMU station of Wuhan EMU section for maintenance to meet tomorrow's operation in the best condition. Xiangyang EMU is responsible for the EMU maintenance functions of Han Shi high speed railway, Zheng Wan high speed railway and Xiang Chang railway. It can maintain 6 EMUs at the same time and store 52 EMUs at most. It is the third "EMU hospital" in our province and the largest EMU in non provincial cities. It is mainly responsible for the first and second level maintenance, temporary maintenance, hollow axle and Lu flaw detection, wheel lath and suction of crh380a and cr400af EMUs Maintenance of EMUs such as sewage and water.

as the main force of Xiangyang EMU construction, China Railway Construction Group Zhongnan company undertakes all the house construction projects of the Institute, including 37 houses such as six line inspection warehouse, staff house and functional supporting house. Since the commencement of the project, adhering to the spirit of "Iron Army", the railway construction personnel completed the construction task with high quality in only 12 months, laying a solid foundation for the smooth operation of the EMU. A 6031 a 6031 Xiangyang bullet train station is in the process of trial repair of "Fuxing No." a 6031 a 6031. It is the first steel grid frame no column bullet train repair depot in China. On November 20, the author walked into the operation and maintenance workshop of Xiangyang bullet train, covering an area of more than 1100 mu. Only 37 houses are scattered on both sides of the 3-kilometer-long track, among which the most striking one is a large house It is a 468m long, 48m wide and 15m high maintenance shed. There are six tracks in the shed, in which two Fuxing trains are parked. The railway staff are carrying out trial maintenance.

"this is the only pillar free steel grid structure maintenance warehouse across the country that combines bolt ball and welding ball across six lines." China Railway Construction Group Central South company introduced that there are six tracks in the garage. In order to increase the functional requirements and facilitate the maintenance of motor cars, the garage design adopted the grid structure scheme without columns for the first time, and did not use the traditional steel truss beam scheme. But in this way, it greatly increases the difficulty of the construction of the six line inspection library. Among them, the roof is lifted by three steel grids as a whole, and each steel grid is assembled offline. A total of more than 18000 members and 5295 spherical joints (more than 3700 bolt balls and more than 1500 welding balls) are needed.

according to the regulations, the welding deviation of each node must be controlled within 1mm, otherwise the bolt ball will not be installed, and the construction requirements are high and difficult. The project department overcame many difficulties such as long-distance transportation, carefully organized design, used BIM Technology, theodolite and other new technologies and equipment, repeated drills, and ensured that each process was correct. At the same time, the number of each member and spherical joint is also written. The workers only need to implement according to the number in the assembly process, and finally achieve the zero error welding of each joint. The main function of

EMU is to absorb and deal with the filth in the toilet of EMU. According to the current situation of the use of the anaerobic pool in EMU, after a long time of operation, the bottom of the pool will appear sediment and harden, greatly reducing the treatment capacity of the anaerobic pool Quantity.

to solve this problem, the project department actively carried out technical innovation when constructing the anaerobic tank of Xiangyang bullet train station, improved the traditional anaerobic tank, and added an automatic mixer controlled by sound wave. Its working principle is that when the thickness of the sediment in the anaerobic tank exceeds 1 meter, the mixer will start automatically to stir the tank to prevent the sediment from hardening. It is reported that this is the first time that this facility has been installed in China's EMU, and this independent invention has applied for a national patent. The head of the project Department of

said that the construction time of Xiangyang EMU is tight and the task is heavy. In addition to the housing project, water supply pipes, sewage pipes, cables, etc. have been laid with a mileage of more than 15 kilometers. Since the commencement of the project in July 2018, all constructors have voluntarily given up the national day, new year's day, Spring Festival and other holidays, always stuck to the front line of operation, and composed a song of high-quality construction of Xiangyang bullet train station with hard work and sweat.