The enterprising way of "China's first heavy load road"

On May 28, the 28 day centralized repair of Daqin Railway in spring was completed successfully. At the time of normalization of epidemic prevention and control and orderly promotion of resumption of work and production, all walks of life across the country made efforts to cultivate new opportunities in the crisis and start new situations in the transformation. China Railway Taiyuan Bureau Group Co., Ltd. takes reform and innovation as the driving force, focuses on the target task of "five guarantees and five results", implements a series of optimization and innovation measures around the "precise and efficient organization and command", "mechanized automation of construction equipment" and "safe and intensive transportation of personnel, machines and tools", and carries out a new exploration for improving the efficiency and quality of centralized repair construction.

"Centralized organization + regional command" helps the corps to fight accurately and efficiently

The 180 minute concentrated repair of the Datong Qinhuangdao line is a battle of the Corps. To ensure that "nearly 20000 people, hundreds of machines and hundreds of operations are carried out at the same time" do not hinder each other from fighting at random, the organization and command system should not only have the "rigorous specification of precise planning and organization", but also have the "flexibility and randomness of dynamic handling of uncertain factors". Taiyuan Bureau Group Co., Ltd. takes improving the ability of centralized repair organization and command as the goal of continuous improvement, and innovates and implements the mode of "centralized organization + regional command".

"Centralized organization" emphasizes "no work without plan, work must have plan". The construction leading group composed of the main leaders of Taiyuan Bureau Group Co., Ltd. takes charge of the centralized repair construction plan, gives overall consideration and overall command, ensures the integrity of the centralized repair plan and the coordination and unity of different systems from the source, and maintains the seriousness and authority of the construction plan. At the same time, the "centralized organization" also gives full play to the advantages of bureau group company in overall planning resources and cross department coordination, and improves the quality and efficiency of solving joint problems.

"Regional command" is to shift the power and responsibility of command down. In order to make the on-site command more flexible and practical, Taiyuan Bureau Group Co., Ltd. set up the "regional construction coordination headquarters" in Datong, chawu and Qinhuangdao for the first time, organized the participating units in the area to prepare plans, coordinate and solve problems, focus on safety quality, and strive to improve decision-making efficiency. The "construction guidance group" composed of Safety Supervision Brigade supervises, inspects and helps to guide the whole process of preparation of plan in advance, construction operation in process and analysis of afterwards problems, so that the supervisors can change from "referees" to "coaches" and "athletes", the safety management and control from "supervision in process" to "pre judgment" and "guidance in process", which improves the key card control ability of on-site safety power. After the implementation of "regional command", the coordination and linkage among the transportation, public works, electricity and power supply systems are stronger, the accuracy and fulfillment rate of the plan are significantly improved, the transportation organization during the construction period is more orderly, the accuracy of the construction plan preparation is significantly improved, and the accuracy rate of the construction daily plan is increased from 80% in the past to 96.5%.

Improve construction equipment and enhance construction efficiency

In recent years, Taiyuan Bureau Group Co., Ltd. has increased investment in construction machinery and equipment, basically realizing the mechanization of centralized construction, but labor-intensive operations such as turnout cleaning, ballast replacement, sleeper replacement, insulator cleaning are still inefficient. In order to promote the transformation from construction organization to quality efficiency type, Taiyuan Bureau Group Co., Ltd. innovated the construction technology and method, and adopted a large number of new equipment in the centralized repair.

In view of different construction operations such as switch and Bridge ballast exchange, Taiyuan Bureau Group Co., Ltd. organized forces to refit the excavator bucket, customized the slope rake, clearing plough, ballast hopper and other ballast exchange tools, and changed them at any time according to the needs of the operation. It is estimated that it takes only 10 to 15 minutes to clean a group of turnout slopes with a slope rake, which is 20 to 25 minutes shorter than manual compression; it takes 70 minutes to clear the center of the screen path with a clearing plough, which is 30 minutes less than manual operation. In the ballast changing operation, the excavation depth of sleeper box and ballast slope is 600mm standard, which makes the drainage structure of ballast bed more reasonable and solves the problems of poor drainage of ballast bed, difficult to control the quality of manual ballast changing and different operation standards; the innovative use of "excavator + cage" for cleaning, the ballast does not land, and the waste soil is directly cleaned to the special waste soil flat car of adjacent line, and transported uniformly Centralized treatment improves the efficiency of cleaning and reduces environmental pollution.

At the same time of mechanized ballast replacement, Taiyuan Bureau Group Company also vigorously promotes mechanized sleeper replacement, which is 4 times the efficiency of manual sleeper replacement. The average number of sleepers replaced by "skylight" in 180 minutes is 693. The mechanical cleaning of turnout reduces the labor consumption by 67% and 80%, which is 6 times higher than the labor efficiency. The power supply department innovated the centralized operation mode of the maintenance train, increased the efficiency by 50%, and used the high-pressure water gun to clean the insulator, the efficiency was 71% higher than the manual cleaning. According to statistics, during the period of centralized maintenance, Taiyuan Bureau Group Co., Ltd. invested 108 large-scale road maintenance machines and 75 medium-sized machines, effectively improving the maintenance quality, operating efficiency and utilization rate of "skylight", reducing labor intensity, saving production costs, improving the secondary utilization rate of materials and reducing environmental pollution.

"Special train for centralized maintenance" to realize the "transfer Railway" of personnel, machines and tools transportation

60% of the whole line of Daqin Railway is mountainous railway. The mountain road is rugged and the road is far away. The transfer of personnel and machines and tools in the centralized repair and construction needs a lot of cars. The risk of traffic safety is great. The cost of car rental for a centralized repair is tens of millions of yuan. In addition, when using vehicles to transfer personnel and machines, they can only go to the end of the bridge or the tunnel entrance, not directly to the actual operation site. The construction personnel have to carry the machines and tools in the tunnel for 3 kilometers or even 6 kilometers, hand-in-hand. A lot of time and energy are consumed on the road, wasting precious "skylight" time.

In this centralized repair, Taiyuan Bureau Group Co., Ltd. changed the transfer mode of personnel and machines from the main mode of automobile transportation to the mode of running road trains, coordinated the resources of overall locomotives, railcars, buses, maintenance trains, etc., and adopted the mode of "rail car reconnection, locomotives + buses, railcars + buses" to break through in five sections from Yangyuan to Zhuolu, dashizhuang to chawu, beixinbao to chawu The "centralized repair special train" can transport 200-300 people at a time, which realizes precise delivery, shortens travel time, reduces labor intensity and improves organizational efficiency. The "transfer Railway" for personnel and machinery transportation also effectively meets the inspection requirements for foreign personnel and vehicles in Beijing, Tianjin and other key areas under the background of normalization of epidemic prevention and control. It is reported that this centralized repair reduced 468 car rentals on a year-on-year basis, not only saving the rental fee of 12.33 million yuan, but also significantly reducing the risk of road traffic safety.