Recently, the list of winning projects of the 18th China Civil Engineering Zhan Tianyou Award has been announced. Among them, the newly built Baoji-Lanzhou Railway Passenger Dedicated Line with the participation of China Railway 21st Bureau is on the list.

The 21st Bureau of China Railway 21st Bureau undertook the construction of Baolan Passenger Dedicated Section 3 with a total length of 26.78 kilometers, including the longest bridge on the whole line-Shetangwei River Bridge and the longest underground shallow buried water-rich tunnel on the whole line-Ma'anliang Tunnel. The ratio is as high as 94.3%. Due to poor geological conditions, high technical standards, and complex construction environment, it has become a hard-bone section of the entire line.

The Shetang Weihe River Bridge is 11.39 kilometers long and spans the Weihe River. The construction technology covers large-span continuous beams, segment assembly, and hanging basket construction. In particular, the continuous beam spanning Xihuang Avenue from Pier 240 to 244 has a total length of 386 meters. The construction is faced with many problems such as large amount of work, high technical standards, tight construction period, and many interference factors. To this end, they dispatched elite troops and organized a professional team to complete the pier pouring in only 19 days. During the construction of the beam sections, each cantilever pouring section took an average of 8 to 9 days, and the entire beam construction only It took 8 months, which is the fastest construction speed in Baolan Passenger Dedicated Line. Experts praised: "The continuous girder of the Shetang Weihe River Bridge across Xihuang Avenue is a long-span continuous girder project with the best safety and quality for the entire Baolan Passenger Dedicated Line."

In the construction of ultra-high-risk tunnels, they strengthened advanced geological forecasts, comprehensively used TSP, advanced drilling, geological analysis, and sketching methods, especially through each cycle of geological sketches, to determine the direction and joints of the surrounding rock of the excavation face. The development of fissures and groundwater are comprehensively analyzed, the stability of the excavation face is comprehensively judged, pre-controls are made in advance, and targeted reinforcement measures are formulated to minimize the mud outburst, water inrush, and water inrush during the construction process. Occurrence of disasters such as sand gushing and landslides. In addition, it also cooperated with China Railway Southwest Research Institute to apply the surrounding rock monitoring and measurement information system to tunnel construction and incorporate it into process management to dynamically grasp the surrounding rock deformation and ensure the safety of tunnel construction.

After more than four years of hard work, the Baolan passenger special project undertaken by China Railway 21st Bureau was completed on schedule and with high quality and efficiency. The output value plan was exceeded for 3 consecutive years. Accomplished the honors of “Winning Unit”, “Advanced Unit of Quality Management”, and “Spiritual Civilization Unit”, and won the May 1st Labor Award of Gansu Province in 2016.

In addition, Jiandao.com editors will also sort out various projects that have won the 2020 Li Chun Award, Feitian Award, Chang'an Cup, Bayu Cup and other provincial and ministerial quality engineering awards.

Li Chun Prize

The Lanzhou South Ring Expressway is 58.743 kilometers long. The Lanzhou South Ring Road Section 10 contracted by the three companies is 3.04 kilometers long. The main works are two bridges and three tunnels.

In view of the various unfavorable geological conditions of the collapsible loess in the tunnel, the construction staff adopted the short-step method for construction, boldly tried and used several new technologies and new techniques such as the first lining trolley, the second lining steel bar and the one-time forming of waterproof materials to realize the loess layer. The shallow buried section was safely and quickly constructed and won the "Li Chun Award" of the China Highway Construction Industry Association. After the opening to traffic, the history of Lanzhou without expressways around the city ended, effectively alleviating the traffic pressure on the Lanzhou City Circle Ring Road.

Gansu Feitian Award

The second company undertook the construction of the Lan-Xin High-speed Railway to Dunhuang Railway Link Line and the 155-kilometer Dunhuang Railway Line Speed-up Transformation. Thousands of employees who participated in the construction overcame difficulties such as long battle lines, heavy sandstorms, high temperatures, strong ultraviolet rays, lack of water and electricity, and completed the transformation of 9 Dunhuang railway stations, replacement of sleepers, replacement of steel rails, rehabilitation of roadbed defects, adjustment of the total cross-section, and contact The network and signal reconstruction project, with only the replacement of sleepers, reached more than 250,000, which reached the conditions for the operation of 160 kilometers per hour EMU, and won the Gansu Provincial Construction Project Feitian Award.

The opening of the railway has opened up the last kilometer of the connection between Dunhuang and the national high-speed rail network. It is of great significance for accelerating the development of western tourism resources, creating new momentum for economic development, and promoting the construction of the Silk Road Economic Belt.

During the soft foundation treatment process of the Baolan Passenger Dedicated Tianshui South Station built by the five companies, combined with indoor simulation and field tests, it analyzed the different rechecked foundation bearing and deformation, and the settlement and difference of the subgrade system in the collapsible loess foundation treatment. Settlement characteristics have accumulated abundant first-hand construction data, and then systematically developed a complete set of use technology for the treatment of large thickness self-weight collapsible loess foundation. This technology has been appraised by China Railway Construction's scientific and technological achievements, and has fully reached the domestic leading level. He has successively won the Second Prize of Science and Technology Progress Award of China Construction Enterprise Management Association, the Special Prize of Excellent Technological Innovation Achievement of Gansu Province Workers, and the "Flying Award" of Gansu Province Construction Project.

The Lanzhou Aviation Base Project of Western Airport Group undertaken by the second company has a total construction area of 64,696 square meters. In terms of new technology, new technology, and new material application, the construction staff adopted self-compacting concrete technology, concrete crack control technology, ultra-high pumping concrete technology, high-strength steel bar application technology, high-strength steel straight thread connection technology, and construction dust control technology , Tool-type shaping technology for temporary facilities, one-time forming technology for concrete floors, high-performance external wall insulation technology, and deep foundation pit construction monitoring technology. Successively won the Gansu Provincial Construction Project Civilization Site, the Gansu Provincial Quality Management Team Activity First Prize, and the Gansu Provincial Construction Project "Flying Award".

Shaanxi Chang'an Cup

China Railway Construction International City Phase II Group A project developed by Deshenghe Company has a total construction area of about 200,000 square meters. The main structure of the project adopts prefabricated construction, which improves the construction efficiency, and the construction accuracy is high and the quality is good. Actively apply the new technologies promoted by the Ministry of Construction in 8 major items and 21 sub-items, and 1 item of technological innovation and technology summary, reaching the leading level in Shaanxi Province.

It has successively won honors such as Shaanxi Provincial Civilized Construction Site, Shaanxi Provincial Construction Quality Structure Project, Shaanxi Provincial Green Construction Demonstration Project, and Shaanxi Provincial Construction Project "Chang'an Cup" awards.

Chongqing Bayu Cup, Shancheng Cup

Chongqing Yongchuan Haitang Primary School undertaken by the five companies has a total construction area of 49306.52 square meters, including a comprehensive teaching building, canteen, gymnasium, lecture hall, rostrum, and guard room. The project took only 18 months to successfully build the school into a high-quality project of "satisfaction with teachers and students, and peace of mind for parents", which effectively alleviated the difficulty of reading for children of the surrounding people and the problem of large class sizes.

During the construction process, they innovatively and comprehensively used new technologies such as concrete crack control, large-diameter steel straight thread connection, exterior wall self-insulation system construction, and automatic calculation of engineering quantities to ensure the quality of construction and improve the overall construction level. The project won the Chongqing "Bayu Cup" Quality Engineering Award.

The second phase of the Chongqing Rail Loop Project has a total length of 17.83 kilometers. From Shanghao Station to the end of the line, Chongqing West Station, there are 11 stations and 1 parking lot. The Electric Power Company undertakes the tasks of full-line communications, integrated monitoring systems, and civil air defense projects. In the construction process, the construction personnel adhere to the spirit of the "four electric railway forces", starting from the project's preliminary investigation and planning, construction organization and management, business efficiency, professional talent training, etc., and assign special personnel to sub-divisions and sub-specialties to monitor the progress of the civil engineering profession. "Seeking the needle" to promote the construction of the project, has been praised by the owner for many times, and won the "Mountain City Cup" Installation Project Quality Award. After the completion of the project, the city's rail transit line grid will be improved to maximize passenger flow and service levels.

Anhui Quality Engineering Award

The third contract of Chu (zhou) Huai (South) Expressway undertaken by the three companies has a total length of 9.97 kilometers and mainly includes about 2.2 million square meters of earthwork, 17 bridges and 10 interchange ramp bridges. During the construction, they achieved many firsts: the first to complete the temporary construction, the first to complete the pouring of the first pier, the first to complete the beam erection, the first to complete the subgrade inspection... From 2016 to 2017, they won for two consecutive years. "AA" credit evaluation by the Department of Transportation of Anhui Province; received the "AA" credit evaluation of the Ministry of Transport in 2017; won the Anhui Provincial Transportation Quality Project Award. After opening to traffic, it has played a positive role in intensifying economic ties with the Yangtze River Delta region, accelerating the construction of the Wanjiang City Belt undertaking industrial transfer demonstration zone and the Hefei Economic Circle.

The Anhui National Road G347 Pu (Jixu) to Zong (Yang) first-class highway project built by the three companies, with a total length of 61.8 kilometers, is the longest construction mileage and largest investment scale of the national highway and provincial trunk road project since the establishment of Tongling, Anhui Province. It is also the first first-class highway to be constructed in Zongyang and won the Anhui Provincial Traffic Quality Project Award. After completion, it shortens the time and space distance between cities and counties, interconnects with rural road networks in Zongyang County and Pujiwei, interconnects with Chizhou Yangtze River Highway Bridge and Deshang Expressway, and also connects with existing and planned national and provincial trunk lines Highway connection is of great significance for promoting regional development and driving rural revitalization.

Railway Quality Engineering Award

The Yinchuan EMU built by the Fourth Company is led from the north throat of Yinchuan Station across the Baolan Railway Overpass. It adopts a double-track T-shaped abutment with a length of 1500.8 meters, 56 ordinary piers and 7 portal piers, and crosses Yinchuan passenger trains. Refurbishment, Baolan Railway, access to the moving train line. In response to high safety risks, difficult construction, strict process requirements, and limited operating time, the construction personnel actively responded to the work requirements of "pragmatism, innovation, and efficiency" and the quality policy of "innovative leadership, bravely being first-class". , Carefully organized, optimized the construction plan, formulated strong safety management measures, guaranteed level by level, and implemented it to everyone. The construction task was completed with zero accidents and won the second prize of railway quality engineering.

The newly-built Hohhot-Jungar railway bridge built by the fifth company spans the Hohhot-Dalian Expressway, with a total length of 6412.01 meters. During the construction process, the construction personnel follow the principle of "test first, model lead the way", and extensively apply new industry technologies such as new anti-corrosion materials and epoxy anti-corrosion coating steel bars, concrete curing spray systems, and pier body spray curing lifting frames. It effectively overcomes the construction problems such as sulfate and chloride salt erosion, soft soil and slurries, and won the second prize of railway quality engineering. After completion, it will be of great significance to the promotion of personnel transportation and economic development in Inner Mongolia, and even the energy supply of the entire North China region. Editor/He Yuting