The total length of the northern line is 24 12 kilometers, and the highest point along the way is Queer Mountain with an altitude of 49 16 meters. The southern line is 2 149 kilometers long and passes through Litang at an altitude of 4700 meters. There is Changdu-Bangda Expressway (169 km) between the north and south lines. Because of its short journey and low altitude, the southern line entered Tibet by Sichuan-Tibet Highway. ?
Sichuan-Tibet Highway is the longest highway in China at present. It is famous for its long mileage, crossing mountains and rivers and great difficulty in construction and maintenance. It is quite difficult to choose the Sichuan-Tibet highway to enter Tibet, but the wonderful scenery along the way is incomparable to other routes. ?
After crossing the Luding Bridge, which is still swaying on the turbulent Dadu River, I went down the river and crossed the air ditch, and soon arrived at the ancient city of Kangding. The familiar Love Song of Kangding has already made Kangding famous all over the world. As the capital of Ganzi Tibetan Autonomous Prefecture, there are many new buildings in kangding city, but the most attractive one is the old houses built on the mountain with mixed Tibetan and Chinese architectural styles.
The famous Happy Horse Mountain is located in the southeast corner of the city, with an altitude of 3000 meters. All kinds of flowers and plants grow on the gentle slope, and the scenery is beautiful. This place has been a good place for Kangding people to "dam" since ancient times. When the weather is fine, I feel comfortable and forget my troubles with so many strange but warm and healthy people, holding hands and dancing a few tap dances. ?
Zheduo Mountain, located in the middle of Daxue Mountain, is an important geographical dividing line. The real Tibetan area lies to the west of this mountain. However, in the past, Zheduo Mountain did not know the difficulties of the Sichuan-Tibet Highway. The mountain pass here is 4250 meters above sea level, the road surface is extremely narrow, landslides are common, and it rains and snows constantly in winter.
Today, the rebuilt Sichuan-Tibet Highway is no longer dangerous. Due to the strong cutting of Minjiang River, Dadu River and other water systems, the geographical features of Zheduo Mountain are characterized by large topographic differences, dense gullies, vertical and horizontal mountains, dense forests and warm climate, which are typical of subtropical warm and humid valleys.
After crossing the mountains and xinduqiao, the terrain gradually slowed down, and the mountains were not as steep as before, and the real trip to the plateau began. ?
The Sichuan-Tibet Highway is divided into two lines from xinduqiao to the north and south, and it can enter Litang Prairie via Scissors Bend Mountain to the south. It is a great basin surrounded by mountains, with an average elevation of 4000m. In August, when green grass and wild flowers are everywhere, the annual Litang Horse Racing Festival is the biggest folk activity in Kangzang area.
At that time, herdsmen on the grassland will come to the racetrack from all directions with tents, gorgeous national costumes and all kinds of exquisite ornaments, which is unprecedented. ?
Cross Haizi Pass (4,995 meters) and enter Batang Valley. Batang is rich in apples, with fertile land, rich resources and good agricultural foundation. As an important town in Tibet in past dynasties, Batang's historic sites are even more remarkable. On the other side of the Batang Jinsha River Bridge is a vast and mysterious hiding place. Batang Valley is located at the junction of Sichuan, Tibet and Yunnan provinces, and the southern Sichuan-Tibet line meets the Yunnan-Tibet line at Mangkang.
Jinsha River, Lancang River and Nujiang River, which originated in Tanggula, Qinghai-Tibet Plateau, compete in parallel in this area for nearly 300 kilometers, forming the so-called "two mountains, one river, two rivers and one mountain" Sanjiang area. There are mountains and valleys here. Since ancient times, there has been a saying that "ten miles are different from the sky". Looking up at the bottom of the valley, it is steep and steep, and the geographical features of confrontation and competition are enough to make every tourist sigh the greatness of nature. ?
The highest mountain pass on the Sichuan-Tibet line is Dongdala Mountain, which is more than 5000 meters above sea level. Seen from the sky, the mountain pass is covered with snow in the distance, and Sichuan-Tibet Road and Lancang River are like two gorgeous ribbons, hidden in Qian Shan and now in Qian Shan, which makes people daydream. ?
After turning dozens of kilometers of Panshan Highway, continue to drive northwest to Bonda. Bangda is the intersection of Sichuan-Tibet North Road and Sichuan-Tibet South Road, connecting Changdu, the first city in eastern Tibet, and Linzhi and Lhasa in the west. It is nearly 4000 meters above sea level, and there is an airport not far from the north.
Shortly after leaving Bangda from the east, it began to descend to the Nujiang River and enter the Nujianggou section known as the "bottleneck" of the Sichuan-Tibet line. After the flash floods and mudslides broke out, the roads built on the accumulated strata were completely destroyed.
After entering Linzhi area along the Sichuan-Tibet highway, it came to the eastern part of Tibet, also known as southern Tibet. Not only the road conditions are good, but also the scenery is beautiful. Since then, more than 400 axioms have been paved to Lhasa.
Extended data:
Sichuan-Tibet Highway started in April. 1950. After the arduous construction of 1 1000 soldiers and civilians, the northern line was officially opened to traffic in February 1954, and more than 2,000 soldiers and civilians died for it. Since then, the road-building army has continued to build the section from East Oro via Batang, Mangkang and Zuogong to Bondanan, which was completed and opened to traffic at 1969, and was formally incorporated into a part of National Highway 3 18.
As one of the five important passages in and out of Tibet. The other four are Qinghai-Tibet Highway, Qinghai-Tibet Railway, Xinzang Highway and Yunnan-Tibet Highway. Among them, the Yunnan-Tibet Highway 2 14 was separated after the merger of Mangkang and Sichuan-Tibet Highway into Bangda, which plays an important role in connecting east and west traffic and has an irreplaceable role and position in military, political, economic and cultural fields.
It is not only the "golden bridge" and "lifeline" for Tibetan and Han compatriots to lead to happiness, but also the link between Tibetan and Han people, which has extremely important economic significance and military value.
When Sichuan-Tibet Highway was built, it was restricted by historical conditions and economic and technical level. Moreover, the construction time is short, the engineering grade is low, and the construction is rough. This is basically a military emergency highway. In addition, the hydrometeorological and topographical geological conditions along the line are very complicated, and various mountain disasters frequently break out, and traffic jams and network disconnection often occur.
Before 1977, with the full cooperation of the Sichuan-Tibet construction troops and the 852nd Brigade (the predecessor of the Independent Traffic Detachment of the Armed Police), some sections were rebuilt according to the old Grade VI technical standards of highways, and some temporary bridges and culverts were built into permanent or semi-permanent buildings.
After 1978, the state interrupted the investment in the reconstruction of the Sichuan-Tibet line, which made it difficult for highways with low technical standards and many diseases to resist the increasingly frequent mountain disasters with increasing scale and scope.
During the period from 1979 to 1984, the entire line was shut down for more than 164 days, and 1985 reached 270 days, about 1992, and the Sichuan-Tibet highway was basically in a state of paralysis.
In order to consolidate national defense, maintain the stability of Tibet's border areas and strengthen national economic construction, the state began to transform Sichuan-Tibet highways from 1985.
Before 1996, the maintenance fund issued by the state averaged about 3,000 yuan per kilometer. After excluding labor costs, there is little left, so it is impossible to arrange minor repairs, major repairs and emergency rescue and disaster relief. We can only try our best to ensure safety and it is difficult to resume rectification.
199 1 according to the function of Sichuan-Tibet highway and the forecast results of traffic volume, and considering the limited investment and the particularity of disaster distribution characteristics, the state has formulated the principle of "reasonable regulation by sections", and decided to establish mechanized maintenance teams, strengthen road management measures, establish road disease databases and early warning and monitoring systems for all or key sections of Sichuan-Tibet highway.
According to the above principles and measures, with the approval of the State Council and the Central Military Commission, the mechanized maintenance detachment of Sichuan-Tibet Highway of Armed Police Traffic was established in June of 5438+096+00, and was renamed as the fourth detachment of Armed Police Traffic in 200 1 year according to the spirit of relevant documents of Armed Police Headquarters. Responsible for the maintenance of the 782.5 km section from Zhubalong to Dongjiu Bridge (K3359+000-K4129+500) with the most complicated geology and the most natural disasters in Tibet.
Brief Introduction of Xizang Autonomous Region People's Government Network-Sichuan-Tibet Highway