Beijing Urumqi Expressway, also known as Beijing Xinjiang Expressway,China National Expressway NetworkThe seventh of the capital radiation line, the national highway network number: G7.[34][45]
Beijing Xinjiang Expressway is an expressway connecting the capital Beijing and Urumqi in Xinjiang, andWestern DevelopmentIt is an important traffic artery with a total length of 2540 kilometers. It was started in September 2012 and basically completed on April 23, 2019. It runs through six provinces, autonomous regions and cities including Beijing, Hebei, Shanxi, Inner Mongolia, Gansu and Xinjiang.
The starting section of Beijing Xinjiang Expressway (Beijing Fifth Ring Road - Sixth Ring Road) was opened to traffic on May 24, 2014;The section from Xinghe South Toll Station to Xinjiang in Ulanqab, Inner Mongolia was opened to traffic on July 15, 2017[2]。
On June 30, 2021, the whole line of Beijing Xinjiang Expressway will be completed and opened to traffic.[24]
Issued by the National Development and Reform Commission in December 2004《National highway network planning》(FGJY [2004] No. 3057).The National Highway Network Plan was reviewed and adopted by the State Council on December 17, 2004[25]This is the first "ultimate" highway skeleton layout in Chinese history, and also the highest level highway channel in China's highway network.
The National Highway Network Plan adopts a layout scheme combining radiation and vertical and horizontal grids to form a large corridor radiating outward from the central city, traversing east and west, and traversing north and south. It is composed of 7 capital radiation lines, 9 north-south vertical lines, and 18 east-west horizontal lines, referred to as the "7918 network", with a total scale of about 85000 kilometers, including 68000 kilometers of the main line, 68000 kilometers of regional loop linesOther routes, such as liaison lines, are about 17000 km long.
The sixth of the seven capital radiation lines is described as Beijing Urumqi.According to the attached figure National Expressway Network Layout Plan, the main control points are: Beijing, Zhangjiakou, Jining, Hohhot, Baotou, Linhe, Ejina Banner, Hami, Turpan, Urumqi.[26]
On July 3, 2007, the Ministry of Communications of the People's Republic of China issued the Industrial Standard for Naming and Numbering Rules of National Expressway Network (JTG A03-2007), which stipulates the naming rules, numbering rules, full names, abbreviations and numbers of national expressway network routes.Beijing Urumqi Expressway No.: G7, referred to as Beijing Xinjiang Expressway.[27]
Comparison between the planned Beijing Xinjiang Expressway and other existing Beijing Urumqi lines before its completion in 2004
The total length of Beijing Xinjiang Expressway is 2540 kilometers.Beijing Fifth Ring Road to Hebei Civil Engineering SectionBeijing Baotou Expressway, Baoheshao Interchange in Hohhot, Inner Mongolia to Linhe Interchange in Linhe District, Bayannur, and Beijing Lhasa Expressway(National Highway G6)Heavy line, Hami Urumqi Section and Lianyungang Khorgos Expressway(National Highway G30)Heavy line.
Beijing Xinjiang Expressway was built in 2004《National highway network planning》The sixth radiation of Beijing Urumqi Expressway (Beijing Xinjiang Expressway for short).The total length is 2582km.The road sections in Hebei, Shanxi, Inner Mongolia, Gansu and Xinjiang have been completed, and only part of the remaining road sections in Beijing are under construction, including: Beijing Deshengkou toYanqing35 km.After the completion of the highway, the fastest large passage from the north of the motherland to Xinjiang has been built, and a XinjiangHorgos PortThe quickest access to the sea along the northern border to Tianjin Port has created the quickest access from Tianjin Port to Rotterdam Port in the NetherlandsEurasian Continental Bridge。And meridianXingxing GorgeThe expressway from Urumqi, Hami, Yiwu to Beijing via the north of Jiuquan and Inner Mongolia will shorten the mileage by more than 1300 kilometers compared with the expressway from the south of Jiuquan to Beijing[3]。
Additional road section
Planning for 2013
On June 20, 2013, the Ministry of Transport officially released the National Highway Network Planning (2013-2030) at a press conference held by the State Council Information Office.This is the fourth national trunk highway network plan issued since China's reform and opening up, and has been approved by the State Council for implementation.[28]
The new national highway network is composed of 7 capital radiation lines, 11 north-south vertical lines, 18 east-west horizontal lines, as well as regional loop lines, parallel lines, connecting lines, etc., with a length of about 118000 km, and another planned long-term outlook line of about 18000 km.
The radiation sequence of 7 capitals has been adjusted.Beijing Urumqi Expressway is adjusted from Article 6 to Article 7.
According to the Figure 2 National Expressway Layout Plan, the main control points are adjusted as: Beijing, Zhangjiakou, Jining, Hohhot, Linhe, Ejina Banner, Hami (Wutong Daquan), Yiwu, Balikun, Qitai, Fukang, Urumqi.[29]
The planned route consists of the Beijing Linhe section of the original national trunk line Danzhu, the Linhe Hami section of the national key highway Dandong Ilkestan, and the Hami Urumqi section of the original national trunk line Lianhuo.Hohhot Linhe Section and Beijing Lhasa Expressway(National Highway G6)Heavy line.
Sketch map of Xinjiang section of Beijing Xinjiang Expressway
Construction history
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Schematic Diagram of Beijing Xinjiang Expressway and Parallel Route
On July 20, 1993, the construction of Hohhot Baotou section began.
On July 8, 1997, the section from Hohhot to Baotou was officially opened to traffic.
In July 2000, the construction of the double track of Huzhou Baotou Expressway was started.
On December 17, 2001, the double track construction project of Huzhou Baotou Expressway was completed.[12]
On November 25, 2005, the section from Baotou to Linhe was completed and opened to traffic for 3 years.
Changping, Beijing, December 24, 2007DeshengkouThe section to Beijing Hebei border is open to traffic.[43]
On July 21, 2008, the section from Beijing Hebei border to Huailai was opened to traffic.[44]On July 26, the section from the Sixth Ring Road to Changping was open to traffic.[41]
In November 2009, the construction of the section from the Fifth Ring Road to the Sixth Ring Road in Beijing began;November 11, Changping, BeijingDeshengkouSection is open to traffic.[42]
On April 27, 2011, the Hanjiaying Hohhot project of Beijing Xinjiang Expressway (west boundary of Inner Mongolia) was officially started.On December 31, the section from Beijing Fifth Ring Road to Beiqing was open to traffic.
On May 24, 2014, the section from Beijing Beiqing Road to the Sixth Ring Road was opened to traffic, marking the opening of the Beijing section of the Beijing Urumqi Expressway.
On November 16, 2016, the section from Xinghe South Toll Station to Hohhot was completed and opened to traffic[11]。
On July 15, 2017, the section from Linhe to Wutong Daquan in Hami was open to traffic.[2]
On April 23, 2019, the Jiaoniwan Xiehe (Hebei Shanxi border) section, Hanjiaying (Inner Mongolia Shanxi border) Xinghe section were completed and opened to traffic, marking the opening of the whole Hebei and Inner Mongolia sections of Beijing Xinjiang Expressway.On the same day, Shanxi section was opened to traffic.[8]On the morning of October 31, the constructors of China Railway 22nd Bureau Group successfully completed the cast-in-place bridge over the Z501 coal transport line in Xinjiang Balikun Mulei section of Beijing Xinjiang (North) Expressway. The construction of Bamu section has made an important breakthrough, which also marks the important progress in the "last kilometer" part of Beijing Xinjiang Expressway, the world's longest desert highway[4]。In November, the section from the sixth ring road of Beijing to Deshengkou, and the section from Deshengkou to Mijiabao Bridge half way into Beijing (temporary freight line) were opened to traffic.
On August 18, 2020, the section from Wutong Daquan to Yiwu in Hami will be open to traffic[16]。
On May 4, 2021, Wumu Section of Beijing Xinjiang Expressway (Wutong Daquan Mulei) will be completed[23]。On June 30, the Wutong Daquan Mulei section of Beijing Xinjiang Expressway (G7) was opened to traffic. So far, the whole line of Beijing Xinjiang Expressway has been completed and opened to traffic. There is a fastest expressway from Urumqi to Beijing.[24]On September 18, Ramps C and D of Shayang Station of Beijing Xinjiang Expressway were opened to traffic.[30]
On March 22, 2022, the Zuowei Toll Station of Beijing Xinjiang Expressway was officially put into operation.Zuowei Toll Station is the toll station of Hebei section of G7 Beijing Xinjiang Expressway and an important hub of the third phase project of Beijing Xinjiang Expressway in Hebei section[38]。
Provincial road section
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Beijing Section
Beijing Xinjiang Expressway
Beijing Xinjiang Expressway (Fifth Ring Road - Sixth Ring Road Section) is the starting point of Beijing Xinjiang Expressway.The project is located on Beijing Lhasa Expressway(National Highway G6)3 kilometers to the west, starting from the south of Yuequan Road.The highway is composed of three upper lanes, three lower lanes and six continuous parking strips. The design speed is 100 km/h. There are 8 interchanges, 8 separated interchanges, 5 river bridges and 3 passages along the whole line.Among them, Shangdi Cable Stayed Bridge is a key control project of Beijing Xinjiang Expressway (Fifth Ring Road - Sixth Ring Road), and it is the bridge with the largest span in North China.The total length of the bridge is 3 kilometers, the main bridge is 510 meters long, the main tower is 99 meters high, and there are 88 stay cables on it, of which the longest cable is 223 meters, and the maximum cable weight is 27 tons.The jacking method used in construction is the heaviest jacking operation in China so far.As the transnational railway Beijing Baotou Line, Metro Line 13 and Beijing Zhangjiakou Intercity Railway on Shangdi Bridge form an angle of 15 degrees with Metro Line 13, the angle is small, and the span of a single tower is 230 meters. In order not to affect the operation of the railway and subway, and in addition, the construction land is insufficient, Shangdi Cable stayed Bridge does not use conventional construction technology. After many studies and discussions by the expert group, the jacking method was finally used,The pushing length is 212m, the pushing distance is 213m, and the total weight of pushing is 25000 tons[5]。
Hebei Section
Jiaoniwan Xiyang River (Hebei Shanxi border) section
The route starts from Jiaoniwan Hub, the terminal of the second phase project of Jinghua Expressway, and passes between the two military zones of Nanshan Circular Industry Cluster and Jijiazhuang Xishan to Zuowei Town for Zuowei Interchange;Jiantoushan Tunnel Group is set in the south of Zuowei Town and the south of New Dongyang Sports and Entertainment Planning Area;Golden Beach parking area is set in the southeast of the Third Tun Village;Sixth Village Interchange is set up in the southwest of Sixth Village;Chaigoupu Interchange is set in the south of Huai'an County Power Plant and Huai'an County Industrial Planning Zone;Continue to the west, and set up the Xiyang River service area and the main line toll station;It passes through the northeast of Xiehe Village, ends at the Hebei Shanxi border, and connects with the Shanxi section of Beijing Xinjiang Expressway.
The total length of the route is 63.085 km.The standard construction of six lane expressway is adopted, the design speed is 100km/h, and the subgrade width is 33.5m.The design load of bridges and culverts is highway level I. There are 2 super large bridges of 3612m, 18 bridges of 4408m, 9 tunnels of 5200m, 4 interchanges, 1 main line station, 1 service area, 1 parking area and 1 maintenance area along the line.1 communication sub center in Zhangjiakou[6-7]。
Shanxi Section
Project name: Shanxi Section of Beijing Xinjiang National Expressway
The project is divided into main line and branch line.The main line of the project has a total length of 8.869 kilometers, starting at the Shanxi Hebei border in the northeast of Pingyuanbao Village, Xinpingbao Town, Tianzhen County, Datong City, Shanxi Province, connecting with the "Jiaoniwan Hebei Border Project of Beijing Xinjiang Expressway", and ending at the southern Shanxi Inner Mongolia border of Hanjiaying Village, Xinghe County, Ulanqab City, Inner Mongolia Autonomous Region, connecting with the "Hanjiaying (Inner Mongolia Shanxi border) Jining Section of Beijing Xinjiang Expressway",The standard construction of two-way six lane expressway is adopted, the subgrade width is 33.5m, and the design driving speed is 100km/h.The Tianzhen branch line is 2.4355 kilometers long, constructed according to the standard of two-way four lane expressway, with a 24.5 meter wide subgrade and a design driving speed of 80 kilometers/hour. It is connected to the Tianzhen Licheng Expressway in Shanxi Province(Shanxi Expressway S45)。There are 1 major bridge, 1 medium bridge, 7 small bridges and 21 culverts along the main line;1 junction interchange, 1 separated interchange and 1 overpass;One parking area is set.The branch line is provided with one major bridge and one minor bridge.The total investment of the project is 615.8992.08 million yuan, including 14.394 million yuan for environmental protection[3][9]。
The total estimated investment of the Hanjiaying Hohhot Project of Beijing Xinjiang Expressway (west boundary of Inner Mongolia) is about 15.6 billion yuan.Following the Beijing Lhasa Expressway(National Highway G6)Then there is another expressway from Inner Mongolia to Beijing.
The starting point of the project route is Inner MongoliaUlanchapHanjiaying, Xinghe County, Huhhot City, connects the Shanxi section of the proposed Beijing Xinjiang Expressway (Beijing Urumqi, Xinjiang), passes Lamaying, Zhanggao, Bazhongyao, Qixiaying and other places, ends at Baoheshao Flyover in Hohhot City, connects the completed Hohhot Ring Expressway and the completed Hohhot Baotou Expressway with four expansion projects[Belonging to Beijing Tibet Expressway (National Highway G6)]The total length is about 212 kilometers.The whole line adopts the standard construction of two-way 6-lane expressway, with a subgrade width of 33.5m and a design speed of 100km/h.
Unmanned area prompt signboard
Hohhot Baotou Section
Hohhot Baotou Section and Beijing Lhasa Expressway(National Highway G6)Collinear.
Baotou Linhe Section
Baotou Linhe Section and Beijing Lhasa Expressway(National Highway G6)Collinear.The total estimated investment of Ha Deng Expressway Project is nearly 5 billion yuan. The starting point is located in Hadmen, Baotou City, and the route passes through Jiuyuan District of Baotou City, Urad Front Banner, Wuyuan County, Linhe District and Hangjinhou Banner of Bayannur City, and the terminal point is Dengkou County.The main line of the highway is 227.578km long, adopting the standard of two-way four lane fully closed and fully overpass expressway. The design driving speed is 100km/h, and the subgrade is 26m wide[13]。
Linhe Baigeda (Mongolian Gansu border) section
Desert Expressway
Linhe Baigeda section was the longest highway crossing desert in the world when it was completed.This section is 930km long and located in the west of Inner Mongolia.Line crossingBadain Jaran、Tengri , Ulanbuh Desert[1][14]。
In January 2022, Linhe Baigeda (Inner Mongolia section) of Beijing Xinjiang Expressway will be completed and accepted.[32]
Gansu Section
The section of Beijing Xinjiang Expressway in Gansu Province passes through Mazongshan Town, Subei County, Jiuquan City. The route starts from Baigeda (the border between Mongolia and Gansu) and connects with the proposed Linhe Baigeda (the border between Gansu and Gansu) Expressway in Inner Mongolia.throughMazongshan Town, ending at Mingshui (Ganxin Territories), connecting the newly-built Mingshui (Ganxin Territories) Hami Expressway, with a total length of 137 kilometers.The whole line adopts the standard of two-way four lane expressway, and the design speed is 120 km/h.The connecting line from Mazongshan Town to Qiaowan is about 147 kilometers, and the standard of Class III highway is adopted. The total investment of the project is estimated to be about 6.13 billion yuan.Construction is about to be completed.At that time, a Jiuquan Aviation Expressway will be introduced from Suzhou District of Jiuquan as an important liaison section of Beijing Xinjiang Expressway[15]。
The completion of the project will improve the national highway network, improve the traffic conditions in the north of Jiuquan, promote the development of the Mazongshan border port in Jiuquan, promote the communication between Jiuquan and Xinjiang, Inner Mongolia, Mongolia, Qinghai, and provide an additional travel route from the Hexi Corridor to Beijing.
The Mingshui (Ganxinjie) - Hami (Wutong Daquan) section of Beijing Xinjiang Expressway is about 99 kilometers long, and the Mingshui (Ganxinjie) - Hami highway project will be constructed.
The Mingshui (Ganxinjie) - Hami Highway is the Xinjiang section of Beijing Xinjiang Expressway planned in 2004. According to the construction schedule of different sections, Xinjiang passes through Hami andLian Huo ExpresswayCollinear.Mingha Highway starts from Mingshui (Ganxin Territories), passes through Baishanquan, Jinghuang Highway, Yemaquan, Hami Industrial Park, ends at Camel Circle of Hami City, and connects toLianyungang Horgos Expressway（G30）。The line has a total length of 179 km, a design speed of 120 km/h, and a subgrade width of 13.75 × 2 meters. It is constructed according to the standard of the new four lane separated expressway.The estimated total investment of the project is 5019 million yuan, and the average cost per kilometer is 28.04 million yuan. According to the 2013 Beijing Xinjiang Expressway Plan, the starting point to Shuangjingzi Interchange isBeijing Xinjiang ExpresswayThe main line, Shuangjingzi Interchange to the terminal Luotuoquanzi Interchange isBeijing Xinjiang ExpresswayAndLianyungang Horgos Expressway(G30).Shuangjingzi Interchange to Camel Circle Interchange, now renamedWutong Daquan Luotuoquanzi Expressway。[31]
Hami (Wutong Daquan) Yiwu Section
The overall route runs from southeast to northwest, starting from Shuangjingzi Interchange of Mingshui (Ganxinjie) - Hami Section of Beijing Urumqi National Expressway (the starting point of this project to K3+000 has been included in Shuangjingzi Interchange of Mingha Expressway), northward, passing Hutouya, the last branch of East Tianshan Mountains, passing Xiamaya Township, and arriving near Yiwu County,The terminal point is located in the southwest of Yiwu County, connecting with the terminal point of Yiwu Balikun Expressway.
Wuyi section is 188.7 kilometers long[16]The expressway standard is adopted, the design speed is 120km/h, and there are two sections of separated subgrade and integral subgrade. The separated subgrade section is 167.08km long, the separated subgrade section is 2 × 13.25m wide, the integral subgrade section is 20.08km long, and the integral subgrade section is 27m wide.A total of 102072300 cubic meters of subgrade earthwork, 7600195 square meters of pavement, 10 major bridges, 16 medium bridges, 143 small bridges, 513 culverts, 39 channels are recommended. There are 3 interchanges, 6 separated interchanges (3 for use), 1 service area, 1 maintenance area, 3 toll stations, and 1 U-turn along the whole line.There is another connecting line, which is Yiwu connecting line.Yiwu connecting line is 2.4km long in total, and Class I highway is adopted. The subgrade is 26m wide and the design speed is 100km/h[17]。
Yiwu Balikun Section
The project starts in the southwest of Yiwu County, connects with Yiwu Interchange of Beijing Xinjiang Expressway from Hami (Wutong Daquan) to Yiwu, and ends at Qianshan Interchange of Beijing Xinjiang Expressway from Balikun to Mulei.Main control points: S302, 110KV Hasan Line, 220KV Hasan Line, Yanchi Township, Fancai Lake Scenic Area, Qianshan Township, etc.According to the recommended scheme in the project feasibility report, the total length of the project route is about 66.585km, which is constructed according to the standard of four lane expressway, and the design speed is 120km/h.There are 928/4 major bridges (m/set), 228/4 medium bridges (m/set) and 340/17 small bridges (m/set) on the main line;There are 2 interchanges, 157/1 (m/set) separate interchanges, 14 car passages and 162 culverts in total;1 service area, 1 maintenance work area and 2 ramp toll stations[18]。
Balikun Mulei Section
The project starts from the west side of Qianshan Township, connects Qianshan Interchange with S302, and ends at Dalangsha Interchange of Qitai Mulei Expressway, with a total length of 261.207km.It is recommended to adopt the standard of two-way four lane expressway, with design speed of 120km/h and subgrade width of 27m.The starting point of Kuisu Interchange connecting line is located in Kuisu Interchange, and then it is laid parallel to S303 (changed to G335). As for about 2.5km west of Junmachang Second Company (Youfang Zhuangzi), the total length of the connecting line is 14.55km.The construction standard is Class I highway, with design speed of 80km/h and subgrade width of 25.5m.
The total length of Balikun interconnection line is 20.21 kilometers, which is divided into new and reconstructed sections.The section from Balikun Interchange to Dahe Town is about 3.01 km long, which is a new section;The section from Dahe Town to Balikun County is about 17.2 kilometers long, which is used for reconstruction of the existing S326 section from Balikun to Dahe Town.Class II highway standard with collection and distribution function is adopted, and the design speed is 60km/h[19]。
Mulei Qitai Section
The starting point of the project is located in the southeast of Shuanglaoba Village, Sangezhuang Township, connecting with the end of Dahuang Mountain Qitai Expressway, passing Mulei River, County Highway X192, the north of Mulei County, the north of Ilhabak Village, Bostan Township, and the end point is the junction of Dalangsha and Mulei Shanshan Class II Highway.The main line is 71 km long, a four lane expressway with a design speed of 120 km/h.
Unmanned section prompt board
Qitai Dahuangshan Section
The project is located in Changji Hui Autonomous Prefecture, with a total length of 112 kilometers. The starting point is located at the Xingfu Intersection Flyover in Dahuang Mountain, passing through Santai Town, Jimsar County, Qitai County, and Central Tuanchang, and the ending point is the fork of Provincial Highway 303. There are 392 bridges, culverts, service areas, etc. throughout the project.The estimated investment of the project is 3.463 billion yuan. The design standard is a two-way four lane expressway with a speed of 120 kilometers per hour.
Dahuangshan Urumqi Section
The reconstruction and expansion project of the Dahuangshan Urumqi section of Beijing Xinjiang Expressway has carried out the "four to eight" reconstruction of the Urumqi Dahuangshan section of the existing Tumuqi Urumqi Expressway. The route starts from the Xingfu intersection interchange in Fukang City and ends at the Shahe interchange reconstruction of the Urumqi Airport reconstruction and expansion road relocation project.The total length of the route is about 101 kilometers.The whole line adopts the standard construction of two-way eight lane expressway (separated subgrade is used locally), and the design speed is 120 km/h.Main control points: Ganhezi Interchange, S303 Provincial Highway, Shanghugou Interchange, Wugongliang Interchange, Tianchi Interchange, Fukang Industrial Park, Flood Control Canal, Liuyun Road Separation Interchange, Shiyun Road Separation Interchange, HV line, etc.The planned construction period of the project is: start on November 10, 2016 and hand over on October 31, 2019, with a total construction period of 1086 calendar days[20]。
Line interworking
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Beijing Urumqi Expressway Interchange (from east to west)
Note: Xishankou Interchange Mijiabao Bridge Section: in the direction of Urumqi, after driving out of Deshengkou Tunnel, it shares the same line with National Highway 110, and there is an independent expressway to Mijiabao Bridge;In the direction of Beijing, after driving out of Mijiabao Bridge, it shares the same line with National Highway 110, and there is an independent expressway to Laoyinzhuang Village.
reference material:[36-37]
Service facilities
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List of service facilities of Beijing Urumqi Expressway (from east to west)
name
Location
Shacheng Service Area
Hebei Province
Zhangjiakou City
Huailai County
Yanghe Service Area
Xuanhua South Service Area
Xuanhua District
Golden Beach Parking Area
Huai'an County
Xiyang River Service Area
Xinpingbao Parking Area
Shanxi Province
Datong City
Tianzhen County
Sumu Mountain Service Area
Inner Mongolia Autonomous Region
Ulanqab City
Xinghe County
Jining South Service Area
Chahar Right Front Banner
Shibatai Service Area
Zhuozi County
Tubaozi service area (under construction)
Hohhot Service Area
Hohhot
New urban area
Hohhot West Service Area
Tumed Left Banner
Hasuhai Service Area
Sharqin Parking Area
Baotou City
Donghe District
Dongxing Parking Area
Baotou Service Area
Qingshan District
Baiyanhua Service Area
Bayannur City
Urad Front Banner
Wulashan Service Area
Xixiaozhao Service Area
Riverside service area
Wuyuan County
Shaanba Parking Area
Linhe District
Qingshan Service Area
Hangjinhou Banner
Nalin Lake Service Area
alxa league
Alxa Left Banner
Dry check parking area
Honggul Yulin Service Area
Shangdan Parking Area
Uliji Service Area
Suhongtu Parking Area
Hohhot Bausger Service Area
Alxa Right Banner
Halsuhai Service Area
Yagan parking area (under construction)
Ejina Banner
Yagan Service Area
Gujuyanze parking area (under construction)
Euphrates Poplar Viewing Platform Parking Area (East)
Ejina Banner Service Area
Euphrates Poplar Viewing Platform Parking Area (West)
Saihan Taolai Service Area
Road well parking area (under construction)
Gobi Viewing Platform Parking Area
Fengleishan Service Area
Black Eagle Mountain parking area (under construction)
Black Eagle Mountain Service Area
Mazong Mountain Service Area
Gansu Province
jiuquan
Subei Mongolian Autonomous County
Baishanquan Service Area
Xinjiang Uygur Autonomous Region
Hami City
Yizhou District
Xiama Cliff Service Area
Yiwu County
Salt pond service area
Dahe Service Area
Balikun Kazak Autonomous County
Luotuojingzi Service Area
Xialaoba service area
Big Stone Service Area
Changji Hui Autonomous Prefecture
Mulei Kazak Autonomous County
Mulei Service Area
Three Zhuangzi service areas
Qitai County
Jimsar Service Area
Jimsar County
Chenglin Gas Station
Dahuangshan Service Area
Fukang
Fukang Service Area
Ka Wan Service Area
Urumqi
New urban area
Technical difficulties
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Construction difficulties
With the gradual increase of the construction scale of domestic mountain expressways, the number of large section, large-span and extra long tunnels is also increasing. This kind of engineering project is difficult in construction technology and high in safety risk.The Jinpenwan Tunnel of Beijing Xinjiang Expressway contracted by CCCC is an extra long tunnel with large section of Grade V soft surrounding rockProject scaleDue to large, poor geological conditions and difficulty in tunneling, the project was rated by the Ministry of Transport as the "Pilot Project for Safety Risk Assessment of Highway Bridge and Tunnel Engineering Construction", the overall risk level of construction safety was rated as Level IV (extremely high risk), and the construction difficulty was rated as the third in the country.
During the construction process of enlarging the construction space by the half section middle diaphragm method, after the completion of the initial support construction of the tunnel, there are often cracks, falling blocks, arch deformation, inverted arch bottom bulge, collapse and roof fall and other diseases. After going deep into the deep buried section, there are more frequent excessive settlements. The danger of arch replacement caused by arch deformation aggravates the construction safety risks and affects the construction period,In the original design, the simple diaphragm method (CD method) and three bench method can no longer meet the construction requirements.
Solution
The construction company attached great importance to the construction of Jinpenwan Tunnel, comprehensively tracked the tunnel construction problems from the early stage of construction, and carried out a special project study on the comparison and optimization of excavation methods for large section tunnels in Grade V surrounding rock, and the treatment measures for large deformation of initial support, and achieved fruitful results.
After comparing and optimizing various excavation methods, such as the middle diaphragm method, the middle diaphragm three bench method, the three bench method, and the half section middle diaphragm method, and after many expert demonstrations, the project department optimized the middle diaphragm method (CD method). According to the characteristics of different surrounding rocks of the tunnel, the half section middle diaphragm method and the double layer initial support method were combined with the three bench method, and mechanical excavation was cited,The construction safety is guaranteed and the construction progress is accelerated.
The half section middle diaphragm method is to effectively avoid the construction risk of the middle diaphragm method (CD method). The large section of the upper half section of the tunnel is divided into two small sections through the middle diaphragm to reduce the excavation section and ensure the stability of the upper half section during excavation;During the construction of the lower half section, the bench method shall be used to speed up the construction progress of the lower half section and close the support structure into a ring as soon as possible.By reducing the excavation area of the upper half section, the working space of the lower half section is increased, thus introducing mechanical construction, and improving the efficiency.
It is reported that the limitation of the half section middle diaphragm method is that the stability is relatively reduced before the whole section support structure is closed, and the construction conditions of no excessive settlement and convergence of surrounding rock are applicable.
With the deepening of the shallow buried section to the deep buried section, abnormal excessive settlement and convergence frequently occur in the tunnel excavation process. After taking various measures such as increasing the locking anchor pipe, increasing the reserved deformation, welding reinforcement on the arch, and shortening the safety step, the project department finally adopted the construction method of combining the initial support of the double steel arch with the three bench method,The settlement and convergence of the tunnel are well controlled, the cracking and falling of the primary support and the deformation of the arch frame are resisted, and the thickness of the secondary lining is ensured.
The double-layer initial support is constructed by the three bench method, and the milling machine is used during excavation to reduce the disturbance to the surrounding rock.During construction, the left and right middle guide, lower guide and inverted arch shall be excavated alternately. Finally, the inverted arch shall be closed into a ring with outer steel support to bear the force together, so as to avoid that the left and right sides of the same section are free at the same time.
The combination of double layer initial support method and three bench method fundamentally inhibits the settlement of initial support, effectively controls the deformation of large section tunnel, and avoids the high-risk operation risk of changing arch after single arch deformation.
Since then, the Jinpenwan Tunnel has been constructed using the double-layer initial support method, without any intrusion or arch change, and the monthly progress has reached 55-60 meters. The left tunnel has been successfully completed[22]。
Value significance
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Beijing Xinjiang Expressway traverses the northeast, north and northwest, also known as the "Three North Highway", with a total length of about 2739 kilometers. It is one of the seven Beijing radiating lines in the National Highway Network Plan, the most convenient highway channel between northwest Xinjiang and Hexi Corridor to connect the capital Beijing, north China, northeast and eastern inland areas, and also a new land road out of Xinjiang,It shortens the highway mileage from Xinjiang to Beijing by more than 1000 kilometers, which can significantly save transportation costs[21]。
Beijing Xinjiang Expressway is an important part of the national expressway network. To a certain extent, it diverts vehicles from western provinces and regions to Beijing, effectively alleviating the traffic pressure of Beijing Tibet Expressway, with significant social benefits[10]。
Honors won
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In November 2022, it was selected into the final list of "2022 China's Top 100 New Era Buildings".[39]
