Qinling Zhongnanshan Tunnel Information

The Longest Highway Tunnel in China —— Zhongnanshan Tunnel in Qinling Mountains

Zhong Nanshan Highway Tunnel in Qinling Mountain, Shaanxi Province is the second longest highway tunnel in the world at present, and it can cross Qinling Mountain in 15 minutes.

Qinling Zhongnanshan Tunnel is located in Xi 'an-Zhashui section of the national trunk line from Arun Banner in Inner Mongolia to Beihai in Guangxi, and crosses the Qinling Mountains between Qingcha and Yingpan. The tunnel entrance is located in Qingcha Village, Shibanyu Township, Chang 'an County, Shaanxi Province, and the exit is located in Xiaoyu Street Village, Yingpan Town, Zhashui County, Shaanxi Province, with a total length of 18.4 km. The road grade is designed as expressway, and the safety grade is the first. The designed driving speed is 60-80km/h, the tunnel section is 5m high and 10.5m wide, and each lane is 3.75m wide. An emergency parking zone is set every 750m between the two tunnels, with an effective length of 30m and a total length of 40m. There is a traffic crossing every 500m, with a clear width of 4.5m and a clear height of 5.97m.. There is a crosswalk every 250 meters with a clear width of 2 meters and a clear height of 2.5 meters. The pavement in the tunnel is cement concrete pavement. Combined with geological conditions, the tunnel lining is designed as a composite lining, except for the entrance and exit ⅱ surrounding rock section and ceiling fan section. Tunnel operation ventilation is provided with three vertical shafts, and longitudinal ventilation is performed in sections. The monitoring system includes seven monitoring systems: traffic monitoring system, security system, communication system, equipment management, toll collection, computer control and central control room. The fire fighting system can detect and alarm quickly and reliably. Generally, it is equipped with a multi-channel alarm system that is easy to identify, combining manual and automatic, and implements fire rescue through fire-fighting facilities and refuge facilities.

Zhongnanshan Tunnel was approved by the State Planning Commission in 20001year1October, with a design period of 67 months and a total investment of about 2.5 billion yuan. Zhongnanshan Tunnel in Qinling Mountains is one of the three landmark projects in Shaanxi during the Tenth Five-Year Plan period. Known as "the longest tunnel in China", the Qinling Tunnel passes through the Qinling Mountains, with frequent disasters such as faults, water inrush, rockburst and gas explosion, among which 24 projects are included in the scientific research projects of the Ministry of Railways. The tunnel is a transportation hub connecting the Yellow River Economic Circle and the Yangtze River Economic Circle, and it is also an important part of Xikang Highway, the main skeleton of the "Mi" shaped highway network planned by Shaanxi Province. Its completion is of great significance to the implementation of the strategy of developing the western region and the economic exchanges between Shaanxi Province and neighboring provinces and cities.

Qinling Zhong Nanshan Extra-long Highway Tunnel is a control project of Xi 'an Ankang High-grade Highway, which is parallel to Qinling Tunnel of Anyang Railway, the longest tunnel in China.

The tunnel is a super-large control project of the western passage of Baotou -Xi- Chongqing-Beihai and Yinchuan -Xi- Wuhan Expressway planned by the state, and it is a transportation hub to communicate the Yellow River economic circle and the Yangtze River economic circle. After the completion of the tunnel, the highway mileage from Xi 'an to Zhashui will be shortened by 60 kilometers and the driving time will be shortened by 2.5 hours.

200 1, construction of the tunnel test section started in early 2002 and was completed in June 65438+February 65438+March 2004. After the project started, each contractor completed the excavation of 36.04 km of main tunnel in only 34 months, with an average monthly excavation of 1.060 m. In mountainous highway tunnels, the project scale, main tunnel length, main tunnel buried depth, section ventilation length, shaft depth and diameter all rank first in China. In order to get through the Qinling Tunnel, China Railway 18th Bureau Group introduced the world's most advanced TBM tunnel boring machine, and its headquarters sent nearly 30 technical backbones to France, Germany, Sweden, Norway and other countries to study. They set up a QC scientific and technological research team to actively reward individuals who have made outstanding achievements in technological innovation and technical research, with a total reward fund of more than 50 thousand yuan. In order to ensure the accuracy of tunnel excavation, the global positioning system (GPS) is used to carry out control survey inside and outside the tunnel. The elevation error of penetration accuracy is 65438±0mm, and the centerline error is 65438 02 mm.. The measurement accuracy is called "the advanced level in the world" by experts.

The construction of Qinling Tunnel has set a record of high yield for six times, with a maximum monthly excavation of 509 meters, reaching a new level of extra-long tunnel construction at home and abroad. He has successively won the first prize of national scientific and technological progress, Luban Award, Zhan Tianyou Award and National Top Ten Construction Science and Technology Achievement Award.

Shaanxi Qinling Zhong Nanshan Highway Tunnel Co., Ltd. is the construction unit; The First Survey and Design Institute of the Ministry of Railways undertakes the design, with the participation of Shaanxi Highway Survey and Design Institute and Chongqing Traffic Research and Design Institute; The project was undertaken by No.1, No.5, No.12 and No.18 Railway Bureau. Chongqing Zhongyu Supervision Consulting Company, Xi An Fang Zhou Supervision Consulting Company and Shaanxi Traffic Engineering Supervision Company will supervise the project. The 12th Bureau of Iron Mine has set a domestic record of 429.5m per month by drilling and blasting. Good results have been achieved in the control of tunnel excavation line position and smooth blasting effect.

Zhong Nanshan extra-long highway tunnel in Qinling Mountain is a world-class extra-long tunnel, and it is also the longest highway tunnel in China and even Asia at present, with great technical difficulty and long construction period. A lot of scientific research work is being done in design, construction, ventilation, monitoring, disaster prevention, waterproof and drainage, operation management and so on. To ensure tunnel construction and scientific operation management. Its completion will further promote the improvement of highway tunnel construction level in China.

The completion of this tunnel will surely become a new milestone in the history of highway tunnel construction in China.

Qinling Zhong Nanshan Highway Tunnel, a super-long expressway tunnel designed and built by China, will be completed and opened to traffic on June 20th, 65438. The tunnel is the control project of Baomao line of national expressway network, and it is also an important part of Xi- Ankang expressway, a "three verticals, four horizontals and five horizontals" expressway network in Shaanxi Province. The total length of a single tunnel is 18.02 km, and the total investment is 31930,000 yuan. After the tunnel was opened to traffic, the natural moat in Qinling became a thoroughfare, and the driving time from Xi 'an to Zhashui County in the depths of Qinling was shortened from 3 hours to 40 minutes.

Color transformation of three rows of lights

When the vehicle enters the tunnel, it seems to enter the world of lights, and the line of sight is clear and bright. At the top of the tunnel side, there are high-power lighting lamps every few meters; In the middle of the tunnel side is a square lamp with both lighting and guiding functions, which has two colors: yellow and blue; At the lower end of the tunnel side, on the side of the sidewalk platform, there are small lights, which mainly play the role of guiding the way. Seen from both sides, these lights are white and red. When the vehicle is driving south, the front leading lights are strung into a white line, while the rear leading lights in the reflector form a red line, which is really beautiful.

The car didn't get out of the hole and saw white clouds floating in the blue sky.

The reporter drove through the tunnel. The vehicle travels less than 10 km from the north entrance of the tunnel to the south, and the brightness of the road ahead suddenly increases. "Is it at the mouth of the cave?" Colleagues' questions aroused everyone's questions.

With the increase of brightness, the tunnel suddenly opened, and everyone's eyes lit up: I saw white clouds floating in the blue sky outside the "hole", the trees were green and the willow leaves were gently brushed.

"It turns out that that special lighting belt is really like a car coming out of the tunnel."

When I got off the bus, I found that the willows, green grass and tropical plants in the special lighting zone were all fake. Dense light gathered at the top of the tunnel, emitting light blue and purple light, where the light intensity is much stronger than other parts of the tunnel. The changed light "changed" the irregular white and blue areas at the top of the tunnel, which really looked like "blue sky and white clouds"; The light at the side of the tunnel hits a dark red beam along the wall and is printed on the wall like a sunset glow; On the sidewalks and on both sides of the tunnel bottom, emerald grass and lavender, reddish and pink flowers are planted. With the wind blowing in the tunnel, the willow leaves fluttered with the wind. ...

No matter how good the lighting is, the car will inevitably have visual fatigue when driving in a long tunnel. In order to reduce the monotony of driving in extra-long tunnels, relieve drivers' visual fatigue and ensure driving safety, a special lighting section is specially designed every 5 kilometers in construction design, and each tunnel has three positions.

The tunnel length of special lighting belt is 150m, its width is gradually changed from 10.5m to 20.9m, and its clear height is gradually changed from 7.6m to1.9m. The change of tunnel width makes people feel suddenly enlightened, as if they are about to leave the hole. At the same time, the special light belt decomposes the tunnel into several short tunnels through different light changes and pattern changes to mediate the driver's mood. It is understood that the design of special lighting belt is the first case in the Asian highway tunnel.