After the new channel of Yunnan and Tibet was completed and opened to traffic, it was more than two hundred kilometers shorter than the old road, and the cultural history, natural scenery and ethnic customs along the way were unforgettable. This new channel, which is centered on C Zha (C Zhongluo-chawalong Township-Chachu), has become the “most beautiful self-driving travel route” in the hearts of self-drivers “.
Overview
Planned total investment of 1.82 billion yuan
The total length of the main line of the route is about 264 kilometers.
The route of this project starts at the junction of Yunnan and Tibet in the south of chawalong Township at Chayu county southeast of Tibet, and connects with the end of the new channel of Yunnan and Tibet in Yunnan, and goes north along the Nujiang River through Bunge pine cone, Qu Zhu, the government of chawalong township, zuobu to MUBA, after leaving the Nujiang River in MUBA, he turned to the northwest jingmengzha, zhuangtong, dezhitong, Ya Na, muruo, changlaka, yixiula, central car, qingche, Ming period, sangjiu, finally, the town of bamboo tile root was connected to line s201. The total length of the main line of the route is about 264 kilometers.
This project has 3 branch lines with a total length of about 41 kilometers. The technical standard of the four-level highway with a design speed of 20 km/h is adopted. The width of the subgrade is 6.5 meters and 4.5 meters, and the turning radius of the main line (turning curve) is not less than 15 meters; When the width of the subgrade is 4.5 meters, under the condition that the topography and geological conditions permit, set the wrong lane according to the place where the spacing is not more than 300 meters.
During the construction process, 8.405 million cubic meters of earth and stone of the whole line of subgrade, 802000 cubic meters of drainage protection of subgrade and 1.605 million square meters of pavement; 95 meters/1 bridge is set for the whole line (including branch line) (The Old Bridge of Nujiang bridge is used), there are 468.56 meters/13 middle bridges and 1045.66 meters/42 small bridges. There are 66 meters/4 old bridges with 695 culverts, including 64 reinforced concrete slab culverts and 631 steel corrugated pipe culverts; there are 3 maintenance work areas in the whole line, covering an area of 60 mu and a construction area of 8080 square meters. The total construction period of the project contract is 30 months, the actual commencement date is June 26, 2015, and the planned completion date is December 26, 2017. The total planned investment of the project is 1.82 billion yuan.
Progress
8 sections have been completed 180 kilometers
Cleaning work of subgrade road appearance
“The highway reconstruction project of Yunnan-Tibet New Channel (within Tibet) from Yunnan-Tibet boundary to Zhuwagen town on Chayu county is divided into 8 bid sections. Our company undertakes the third contract bid section.” According to the relevant person in charge of the project department of Tibet Tianlu Co., Ltd, the third contract section undertaken by the company is located in chawalong township, Tibet Chayu county, with a total length of about 30 kilometers. It is located in primitive forest, along the stream wiring, and has poor geological development, at the same time, the project department is in the middle of 8 bid sections, and it is difficult to transport the materials used for construction and living materials. In order to implement the spirit of “building a road for the benefit of one party”, the third section of this project has accumulated 6 million yuan for local farmers and herdsmen. Up to now, the subgrade engineering of the project department of the third section of this project has been basically completed, and the remaining main tasks are pavement engineering, the upper part of the bridge and affiliated parts. The whole line of the new channel in Yunnan and Tibet is expected to reach the opening conditions in October this year.
As of May 5, 2017, the excavation of civil engineering in 8 sections of this project has completed 5.018 million cubic meters in total; The excavation of stone has completed 3.994 million cubic meters in total; The filling has completed 2.627 million cubic meters in total; The gravel flow treatment has completed 94000 cubic meters in total; the masonry retaining wall has completed a total of 819000 cubic meters; The C20 stone concrete has been completed a total of 57000 cubic meters; The M7.5 masonry stone side ditch has been completed a total of 42000 meters; The total number of abutments has been completed 113; The total number of prefabricated hollow slab beams has been completed 227; in BEAM and slab, 193 pieces of hoisting were completed in total; 527 steel corrugated pipe culverts were completed in total; 51 slab culverts were completed in total; 22085 square meters of graded gravel base were completed in total, and 21797 square meters of cement concrete panels were completed in total. Up to now, the civil construction contract section of 1 to 8 construction bid sections of this project has completed the cleaning work of about 180 kilometers of subgrade, road appearance and road appearance, and has the conditions for sequence change.
Difficulty
Affected by natural conditions
The project construction is difficult
This project is located in the southeast of Qinghai-Tibet Plateau. It crosses Mount Nu and boshuraling mountains in Hengduan Mountains from east to west. It belongs to the landform of tectonic denudation high mountain canyon and Zhong-Shan Gao Canyon. The surface water system along the route is developed, the mountain is high and steep, and the geological structure is complicated, rock formation is broken, new tectonic movement is active, the earthquake is severe, the external force weathering abtragung is strong, and the surface rock mass is broken. In addition, there are abundant ice and snow melting water in the high mountain areas occupied by modern glacier snow, with concentrated precipitation and high rainstorm intensity. These special natural conditions often lead to many adverse geological phenomena along the highway, such as collapse, dangerous rock, rock pile, landslide, debris flow, gravel flow, snow damage, saliva ice, water damage, etc. In this regard, each construction unit of this project has formulated a detailed geological disaster treatment plan according to different geological disasters existing in their respective bid sections, so as to cope with the occurrence of geological disasters at any time, and take corresponding measures to rectify the unfavorable geological sections.
According to the introduction, the most difficult construction of the third section of this project is the representative turning back, which has 12 turns. Due to the topography and geology and the alignment of the original design, many protection projects cannot be constructed. There will be blasting construction in the process of cutting excavation, and blasting will affect the construction protection project. There are also some retaining walls built, and workers can only hang them in mid-air with safety ropes.
Due to the limitation of terrain conditions, the roads of part of the bid section of this project must be cut off during construction. In addition, frequent geological disasters make the maintenance work extremely difficult. In order not to affect the transportation of materials and materials and the daily life of local residents, the construction unit formulates detailed Baotong plan, and actively coordinates with local government departments to equip sufficient Baotong machinery equipment and personnel, ensure that the road maintenance time meets the needs of all parties. The effective construction time of some paragraphs is short, and the transportation of materials and materials is difficult.
Significance
After the project is completed and opened to traffic
Transform local resource advantages into economic advantages
According to the construction requirements, the reconstruction project of the new Yunnan-Tibet Channel (within the territory of Tibet) from Yunnan-Tibet boundary to Chayu county Zhuwagen town is planned to be completed and opened to traffic by the end of 2017. The existing roads of this project (within the territory of Tibet) are the roads that are connected to other villages, with complex terrain and geological conditions, serious shortage of subgrade protection drainage, bridge and culvert facilities, ungraded roads, poor disaster resistance and poor road conditions, it has seriously restricted the pace of poverty alleviation and prosperity of ethnic minorities along the route. The reconstruction project improved the horizontal and longitudinal alignment of the route; Cured the disease; Renovated and widened the subgrade; Paved the pavement; Added bridges and culverts and drainage projects; necessary traffic safety and management facilities are added to make the traffic safer and more comfortable, and the driving speed is also increased accordingly.
According to reports, it used to take nearly 13 hours to drive from chawalong Township to Chayu county, and the road conditions were extremely poor, which was prone to safety accidents. After the project was completed and opened to traffic, it took only 8 hours to drive from chavaron to Chayu county, and the driving safety was greatly improved. Yunnan-Tibet New Channel (within Tibet) Yunnan-Tibet boundary to Chayu county Zhuwagen town highway project is one of the key projects in the “Twelfth Five-Year Plan” highway traffic planning and construction of Tibet autonomous region. Its implementation plays a very important role in developing tourism resources along the route, promoting the development of tourism, promoting the economic and social development along the route, and improving the production and living conditions in remote minority areas. After the new channel of Yunnan and Tibet (within Tibet) is completed and opened to traffic, the local traffic conditions will be greatly improved, and the local rich resource advantages will be transformed into economic advantages, thus providing a strong guarantee for local poverty alleviation and prosperity. (Zhang Xuefang)
After the 3282
Yunnan-Tibet new channel was completed and opened to traffic, it was more than two hundred kilometers shorter than the old road, and the cultural history, natural scenery and ethnic customs along the way were unforgettable. This new channel, which is centered on C Zha (C Zhongluo-chawalong Township-Chachu), has become the heart of self-driving people.