The Jinshan Special Bridge spans the Chengkun Railway and the West River, connecting the Jinshan Tunnel Group. Photo by Yang Guihong
Photo by Yang Guihong of standardized beam plate prefabrication field
Qinfeng Hub Interchange Photo by Yang Guihong
This is a "central enterprise into Yunnan" landing practice road, innovative cooperation form, "Internet +" management mode, to build a first-mover to try the way; this is a green road full of science and technology, high-tech support has opened a new way of ecological protection and construction and construction; it is also a road to prosperity, benefiting more than 20 million people, connecting Kunming and 8 prefectures and cities, and further promoting the economic development along the route.
With a total length of 106.835 kilometers, it is only a short section on the 9,000-kilometer highway map of Yunnan. However, this section is an important project of the "central enterprises into Yunnan" strategy and the "all-access" project of the county-level expressway in Yunnan Province.
With the completion and opening of the New Kunchu Expressway on January 21, an economic new trunk line has been added between Kunming City and Chuxiong Yi Autonomous Prefecture, which will effectively alleviate traffic congestion in western Yunnan and boost the economic development of western Yunnan.
It's a technology path
The new Kunchu Expressway is an important section of the G56 Hangzhou-Ruili Expressway in Yunnan in the National Highway Network Planning (2013-2030) and the Yunnan Provincial Road Network Planning (2014-2030).
There are 45 tunnels on the whole line, including 8 long tunnels, 201 bridges, including 5 special bridges, and the bridge-tunnel ratio is as high as 62.8%... The complex geological structure has become a "roadblock" in the construction process. The construction is difficult and the construction standards are high, and the builders have overcome difficulties and broken through one technical problem after another.
Located in the survey and test section, the Qinfeng Long Tunnel is the longest tunnel in the whole line, with a single length of 5480 meters, the surrounding rock is a typical red rock in western Yunnan, with a maximum burial depth of 361 meters; and it has repeatedly crossed the fault and fracture zone, and the surrounding rock is broken and complex and changeable, and the mud is rich in water, and it is very easy to appear small collapse, water inrush mud and large deformation of the surrounding rock. "During the construction process, the Qinfeng Long Tunnel had nearly 60 small collapses, water inrushes and mud inrushes, and about 90 times the surrounding rock was deformed and arched, and it took us nearly 5 years to gnaw down this hard bone." To this end, a number of scientific research and technical research such as power supply, ventilation and soft rock deformation of the long tunnel have been carried out, and two utility model patents and one second prize of QC achievements of the China Construction Enterprise Management Association have been awarded. Yang Guihong, chairman and general manager of Kunchu Expressway Company of China Railway Construction Kunlun Investment Group, introduced.
Practicing the new management concept, the new Kunchu Expressway has created a smart construction site through the "Internet +" model. With the help of BIM technology and information technology, the builders eliminate the potential risks of project safety production, innovate the safety supervision mode, provide guarantee for safe construction, and effectively improve the level of safety supervision and work efficiency. "The smart construction site focuses on the front-line operation layer of construction, and realizes the integration, systematic and intelligent management of the construction site through real-time, comprehensive and intelligent monitoring of people, machines, materials, laws, rings, etc., so as to accurately and timely collect data, intelligently excavate and analyze data, and intelligent comprehensive forecast data." Especially in the early stage of the prevention and control of the new crown pneumonia epidemic, the smart construction site system also played an important role in the management of the flow of participants in the construction. China Railway Construction Kunlun Investment Group Kunchu High-speed Company deputy general manager Ba Huaiqiang said.
In the process of bridge erection, the rotary body construction based on BIM technology was used. The main bridge turnaround part of the Main Bridge of Dade Bridge is 106 meters long, the width of the bridge deck is 33.5 meters, and the beam body weighing 15,000 tons is rotated counterclockwise by 66 degrees after crossing the Chengkun Railway; the turnaround section of the Jinshante Bridge is 116 meters long, the single width is 16.6 meters, and the height of the pier is about 30 meters, and the continuous beam is poured section by section by section by using the hanging basket method, and two T-shaped pier structures weighing about 7400 tons are prefabricated on both sides of the railway, using the railway "skylight" time, with the help of the bottom device of the pier, the "twins" are synchronously rotated clockwise for about 76 degrees before crossing the Chengkun Railway. The bridge rotation construction uses BIM technology three-dimensional deepening drawing for visual management, calculates eccentric distance, adjusts the central position of the ball hinge, effectively ensures the stability of the beam body during the construction process, and the construction accuracy of the ball hinge is also controlled in the millimeter level.
Explore the "turning waste into treasure" of steel slag and pave a new way for green development. In the Lufeng connection line, there is a section of 724 meters long, 11 meters wide, and 645 tons of steel slag paved steel slag asphalt pavement, which is a test section of the performance-oriented steel slag asphalt mixture application technology research and technology project approved by the Provincial Transportation Department. The project used the mechanical properties of steel slag to be similar to that of rolled basalt, hard and wear-resistant, good particle shape, and good adhesion performance with asphalt, etc., to study the feasibility of replacing basalt as an aggregate of asphalt mixture. If steel slag is widely promoted and used in road construction and maintenance, it will be able to realize the recycling of industrial solid waste and reduce the impact of mining basalt on the ecological environment.
In the construction process, the construction units affiliated to China Railway Construction gave full play to their technical advantages, optimized the construction plan, and carefully organized the construction, effectively ensuring the progress requirements and quality of the difficult projects.
It's a beautiful road
Take a green path and let ecology first.
Part of the new Kunchu Expressway is located in the ecological key protection area, and how to protect the environment without affecting the construction plan has become a problem that the project builders have been considering.
Take the section through Kunming Dianchi Lake and Xishan Key Conservation Area as an example. In order to solve the problem of slag consumption, the construction unit has innovatively combined the slag consumption with the ecological treatment and vegetation restoration of the abandoned mine pit after many investigations and studies, and has used the abandoned mine pit near the project to absorb nearly 2 million cubic meters of slag, which not only solves the problem of slag consumption, but also saves the ecological treatment and vegetation restoration costs of the abandoned mine pit.
The Mantis River is the only outlet of Dianchi Lake, and ecological protection is particularly important during the construction of the Mantis Chuan Special Bridge. In order to reduce the impact of construction on the environment, after repeated demonstrations by construction, design, construction, supervision units and water environmental protection experts, the wading project broke the traditional construction mode of island construction, adopted the construction process of steel sheet pile cofferdam + construction trestle, and implemented mud transportation. Although the construction cost has increased, the construction progress has been accelerated, and the pollution of the mantis river water flow is minimal.
From the selection of the line to the construction, the participating units fully investigated and studied the topographic and geomorphological characteristics and natural resources along the line, scientifically designed and strictly controlled the construction, so that the highway construction and the ecological environment of the road area were coordinated and harmonious. In the planning and design, with the integration of roadscapes as the principle, adhere to the concept of not destroying is the greatest protection, adhere to the terrain selection, geological selection, environmental protection, safety, landscape selection policy, and strive to integrate the highway into nature and conform to nature.
Characteristic design, so that the ecological avenue is also a "beautiful avenue". There are 7 interchanges, 1 service area and 2 parking areas on the whole line, and the architecture and landscape greening integrate the ethnic and regional unique elements and culture along the line in the design, with distinctive characteristics.
When designing facilities along the route and naming bridges and tunnels, full consideration is given to local ethnic customs, history and culture, and local characteristics. For example, the Huahongyuan toll station highlights the characteristics of Kunming, the whole is like a flying red-billed gull; the Lufeng toll station integrates dinosaur elements to show the charm of the "hometown of dinosaurs"; the Yipinglang toll station organically combines the Yi culture and Miao culture, fully embodying the local ethnic characteristics. The names of the tunnels and bridges combine the thick historical and cultural heritage along the route to highlight the history and culture of Yunnan's "Nine Passes and Eighteen Shops" and "West Yunnan Tea Horse Ancient Road".
In the process of service area construction, closely focusing on the requirements of facility beauty, green beauty, and road beauty, adjust and optimize the design plan of greening engineering, increase greening on a large scale and with high standards, and build high-quality green belts and landscape belts along the line; during the construction period, optimize the design plan of the service area twice, and improve the function and quality of the service area in accordance with the overall requirements of standardization, scenicization, standardization, digitization, specialization and clean, orderly, intelligent and distinctive.
It's a road to riches
Due to the wide radiation area and large population of the active Kun'an and Anchu expressways, the traffic flow has already exceeded its traffic carrying capacity, and traffic congestion occurs frequently. After the completion of the new Kunchu Expressway, it will effectively change this situation.
The New Kunchu Expressway is an economic trunk route from Kunming to western Yunnan, northwestern Yunnan, southwestern Yunnan and Tibetan areas, and is also an international corridor connecting South Asian and Southeast Asian countries in the main passage of the "seven provinces and five exits" highway in the expressway network of Yunnan Province. After it is completed and opened to traffic, it will have a far-reaching impact and great significance on improving the depth and coverage of transportation infrastructure in the western Yunnan area and even the whole territory of Yunnan.
The total length of the new Kunchu Expressway is 106.835 kilometers, which is about 20 kilometers shorter than the current Kun'an and Anchu Expressways. The highway is built on a two-way six-lane standard, with an emergency lane on each side and a design speed of 100 kilometers per hour. According to the "Yunnan Provincial Implementation Plan for Optimizing The Speed Limit of Expressways", after optimizing the speed limit, the average speed of passenger cars can reach 115 kilometers per hour, and it takes more than 1 hour to travel from Kunming to Chuxiong.
Speaking of the development prospects after the highway is opened, Yang Fabing, general secretary of the party branch and director of the village committee of Henggou Village, Yipinglang Town, is full of confidence: "After the opening of the new Kunchu Expressway, there will be more and more tourists, and the Henggou Village Committee plans to invest about 1 million yuan to create a starry sky tent homestay on the cloud through entrepreneurial loans and the company + the masses model." We are confident that with the help of the new Kunchu Expressway, business will get better and better, and the people along the route will also get more benefits. ”
The new Kunchu Expressway radiates more than 200,000 square kilometers and a population of more than 20 million, and the location of the road network is very important. After opening to traffic, it can greatly alleviate the traffic pressure of the existing Kun'an and Anchu expressways, strengthen the comprehensive layout of the expressway network in Yunnan Province, form the main skeleton passage between Kunming and 8 prefectures and cities such as Chuxiong, Dali, Baoshan, Nujiang, Dehong, Lijiang, Lincang and Diqing, promote the economic integration of central and western Yunnan, strengthen regional cooperation, and further promote economic and social development along the route.
"The new Kunchu Expressway starts from the shore of Dianchi Lake in the western suburbs of Kunming and The Mianshan Mountain on the west mountain, passing through Many scenic spots such as Qipan Mountain, Leopard Basket, Mantis River, Dadishui, Qinglong Gorge, Dinosaur Valley, Jinshan Ancient Town, etc., coupled with the rich ethnic culture and high-quality green belt and landscape belt planned and built along the route, it will surely become a beautiful avenue that boosts the development of the tourism industry along the route." Yang Guihong said.
New Kunchu inherits the "spirit of railway soldiers"
As early as half a century ago, China Railway Construction and Yunnan formed an indissoluble relationship. The Completion of the Chengdu-Kunming Railway, which runs from Chengdu in the north to Kunming in the south, was opened to traffic in 1970, and the completion of this railway is of great significance to the development of resources in the southwest region and the opening up of external channels in southern China.
Once, railway soldiers used their blood and lives to build one great wall of steel after another, and made outstanding achievements in neutral conditions under difficult conditions, laying a solid foundation for socialist modernization, and were known as "railway construction commandos." This glorious journey has created a "railway soldier spirit" that can be sung and wept. Today, the former "railway soldiers" are still active in the front line of construction and contribute to the development of socialism with Chinese characteristics in the new era.
Xie Junming, director of the coordination department of the kunchu high-speed company of China Railway Construction Kunlun Investment Group, is a railway soldier who joined the army in 1981, although he is nearly a year old, he is energetic and energetic, and he has been running in the front line of land acquisition and demolition work all year round. Under his coordination and promotion, the relocation of transmission lines and oil pipelines has been steadily promoted, and more than 11,000 mu of permanent land required for the project has been delivered to the construction unit in a timely manner according to schedule, laying the foundation for the project to be completed and opened to traffic ahead of schedule.
The former railway soldiers, today's China Railway Construction, the "railway soldier spirit" has developed into the "iron construction spirit".
In 2020, the epidemic disrupted the construction plan, and all participating units strictly implemented the requirements of grasping epidemic prevention and control on the one hand and resuming construction on the other, and tried every means to promote the resumption of work and production, and strived to minimize the impact of the epidemic. The Party Working Committee of Kunchu Expressway Company of China Railway Construction Kunlun Investment Group played a pioneering and exemplary role of party members, allowing party members to take the initiative to show their identity, set an example and build an image in the production line, and take the lead in promoting the resumption of work and production. Yang Guihong, secretary of the Party Working Committee, gave a special party lesson on "Boosting Project Construction with the Spirit of Fighting The Epidemic and Letting the Party Flag Fly High on the Front Line", calling on the majority of participants to carry forward the spirit of fighting the epidemic, bite the established goals, focus on the shortcomings of the problems, do everything possible to break the bottleneck, and fully promote the construction of the project. The Party Working Committee also organized the activity of "listening to the stories of the railway soldiers and inheriting the spirit of the railway soldiers" to inspire the iron builders to carry forward the "spirit of the railway soldiers" and break through the construction problems one by one with the courage and courage to attack the city and pull out the villages. All participating units organized labor competition activities, with a dry sunny day, a dry cloudy day, a good dry rain day, and a good day to promote the construction progress, under the premise of ensuring safety and quality, to recover the delayed construction period.
With the efforts of all parties, the new Kunchu Expressway was completed and opened to traffic ahead of schedule. Huang Xiaotong, Secretary of the Party Committee and Executive Director of China Railway Construction Kunlun Investment Group Yunnan Investment Company, introduced that in order to complete the target tasks issued by the Yunnan Provincial Decisive County Expressway "Energy All Access" Project Leading Group and the Provincial Department of Transportation, China Railway Construction Kunlun Investment Group Yunnan Investment Company established the Kunchu Expressway Project Baotong Leading Group and Baotong Special Class on April 23, 2021. Subsequently, all the participants took the construction progress as the top priority, everything revolved around the construction progress, all services "guaranteed opening", clarified the leadership of the guarantee, refined the responsibility of the guarantee, accurately defined the node goals, and accurately implemented policies and inverted the construction period for the difficult projects, and implemented the working mechanism of daily progress and weekly scheduling, so that the project construction pressed the fast forward button and ran out of acceleration.
On July 1, 1970, the Chengkun Railway, which sprinkled the blood and sweat of countless railway soldiers, was officially opened to traffic, rewriting the history of 20 million people in the southwest ethnic areas of the mainland.
Entering a new era, the "spirit of railway soldiers" has interpreted a new meaning on the new Kunchu Expressway. With the opening and operation of the new Kunchu Expressway, the "Iron Construction Expressway" has added new members. Up to now, China Railway Construction Kunlun Investment Group has invested in the construction of 35 expressways, with a total mileage of 3248 kilometers, and has completed and opened 1163 kilometers.
sound
Tie Jianren said
The new Kunchu Expressway was completed and opened to traffic ahead of schedule, highlighting the responsibility of central enterprises, showing the image of quality iron construction, and proving the efficiency of the iron construction plan.
——Sun Xianwu, General Manager of Yunnan Investment Company of China Railway Construction Kunlun Investment Group
The new Kunchu Expressway is the 12th expressway opened and operated by China Railway Construction Kunlun Investment Group in the southwest area, which once again proves that the "Railway Construction Expressway" has formed a complete set of replicable, generalizable and reference management systems, and is also a vivid embodiment of the integration advantages of Kunlun Group's "investment and construction camp".
——Mo Tianshui, deputy head of the Kunchu High-speed Operation Preparatory Group of China Railway Construction Kunlun Investment Group
The engineer said
The New Kunchu Expressway is like my child, which I watched grow up. The construction of the new Kunchu Expressway has always adhered to the concept of full life cycle, refined management and total quality management; China Railway Construction Kunlun Investment Group also entrusted external institutions and experts to conduct "physical examinations" of the second lining of the tunnel and the protective layer of steel reinforcement, and urged the construction unit to eliminate the shortage in time.
——Xu Guangli, deputy chief engineer of Yunnan Investment Company of China Railway Construction Kunlun Investment Group
In the construction of the new Kunchu Expressway, the participating units rely on the solid technical strength of China Railway Construction to innovate the construction process method. The project company alone applied for the establishment of 3 scientific and technological projects, declared 3 utility model patents, published 2 monographs, published more than 10 scientific research papers, and 3 people have passed the evaluation of the title of senior engineer and 4 people have passed the evaluation of senior engineers, and a number of professional and technical personnel have been trained and trained.
——Zhang Mengjin, chief engineer of Kunchu High-speed Company of China Railway Construction Kunlun Investment Group
The rider said
After Kunming to Chuxiong only need more than 1 hour, to Chuxiong or to the tourist attractions along the highway is also more convenient, coupled with the highway condition is also better, and shortened the drive, after the opening of the traffic for weekend travel or weekday commuting is a major benefit.
——Ms. Zhang, a citizen
Many scenic spots along the line have not been, after the opening of the traffic, I want to experience it, shorten the driving time on the road, invisibly increase the time to play, and then the day round trip is completely too late.
——Mr. Lee, a citizen
The driver said
Previously, it took at least 2 hours to travel between Kunming and Chuxiong, and sometimes it took longer to encounter traffic jams. After the opening of the traffic, the driving time has been greatly shortened, while alleviating traffic congestion, saving fuel and time, this road really makes us wait too long.
——Mr. Wang, the driver
(Dai Fei, Cao Xuanyin)
(Yunnan Net)