Ma'anshan Yangtze River Bridge

Ma'anshan Yangtze River Bridge

Ma'anshan Yangtze River Bridge is a river crossing channel connecting Chaohu City and Ma'anshan City in Anhui Province of China. It is located on the Yangtze River channel and is one of the important parts of the 24 provincial highways in Anhui Province.

The construction of Ma'anshan Yangtze River Bridge was started on December 28, 2008, completed on December 22, 2013, and opened to traffic on December 31, 2013.

MAANSHAN Yangtze River Bridge starts from Laoqiao hub in the west, crosses the Yangtze River waterway and ends at Maanshan Shandong hub in the East. The total length of the line is 36.14 km, and the main part of the river crossing is 11.209 km. The bridge deck is a two-way six lane urban expressway with a design speed of 100 km / h. The total investment of the project is 7.078 billion yuan.

Construction process

On April 19, 2004, the development and Reform Commission of Ma'anshan City submitted to the development and Reform Commission of Anhui Province a request for instructions on the proposal for the project of Ma'anshan Nanjing Lukou (Lishui) Expressway, proposing the construction of Ma'anshan Yangtze River Bridge.

On July 31, 2004, Ma'anshan municipal government submitted to the provincial government the request for instructions of Ma'anshan Municipal People's Government on speeding up the construction of Ma'anshan bridge and the construction of the third road network channel integrating Anhui into the Yangtze River Delta.

On February 14, 2006, the national development and Reform Commission of China approved the establishment of the Ma'anshan Yangtze River Bridge project. On March 7, Anhui Provincial Expressway Corporation hosted an expert review meeting in Ma'anshan City for the analysis report on river bed evolution of Ma'anshan Yangtze River Bridge project and the Research Report on river model test of Ma'anshan Yangtze River Bridge project, and formed review opinions.

On December 28, 2008, the commencement ceremony of Ma'anshan Yangtze River Bridge was held; on September 26, the Ministry of transport of Ma'anshan City approved the preliminary design of Ma'anshan Yangtze River Bridge

On February 26, 2009, the Ministry of transport of Ma'anshan City approved the technical design of Ma'anshan Yangtze River Bridge.

On February 3, 2010, the North Tower bearing platform project of Ma'anshan Yangtze River Bridge was completed; on March 25, the bored pile project of the left branch main bridge of Ma'anshan Yangtze River Bridge was completed; on December 27, the capping project of Ma'anshan Yangtze River Bridge was completed.

On August 6, 2013, the closure project of the right branch cable-stayed bridge of Ma'anshan Yangtze River Bridge was completed, and the whole bridge was connected; on December 22, Ma'anshan Yangtze River Bridge passed the completion acceptance; on December 31, Ma'anshan Yangtze River Bridge was opened to traffic.

Bridge location

Ma'anshan Yangtze River Bridge is located in the east of Anhui Province in the middle and lower reaches of the Yangtze River, connecting Ma'anshan City and Chaohu City and county. The bridge is about 27 km away from Wuhu Yangtze River Bridge in the upper reaches and 46 km away from Nanjing Yangtze River Bridge 3 in the lower reaches. It starts from Laoqiao hub in Chaohu City in the west, crosses Changjiang River in the heart of Ma'anshan River, and ends at Ma'anshan Shandong hub in the East. The route through the bridge is Anhui Provincial Highway 24.

Architectural design

building structure

Overall layout

Ma'anshan Yangtze River Bridge is composed of left branch bridge, right branch bridge, six pylons, approach bridge and its interchange ramps. The main bridge section is arranged from due west to due east.

 

Design features

Ma'anshan Yangtze River Bridge is divided into left branch bridge and right branch bridge. The left branch bridge is a three tower two span suspension bridge, and the right branch bridge is a three tower six span double cable plane semi floating cable-stayed bridge.

 

Design parameters

The total length of Maanshan Yangtze River Bridge is about 36.274 km, including 11.209 km for the main project of crossing the river, 19.320 km for the south bank and 5.745 km for the north bank; the whole width of the bridge is 33.0 m and the width of each section is 16.0 M.

 

The main bridge of the left branch is a three tower two span suspension bridge with symmetrical structure. The span of the main beam is 2 × 1080m, the main cables are arranged in different spans (360 + 1080 + 1080 + 360) m, the theoretical sag of the main cables in the middle span is 120.0m, the ratio of the vertical span is 1 / 9, the theoretical sag of the main cables in the side span is 2.682m, and the ratio of the vertical span is 1 / 134.228. The upper column of the middle tower is 127.8m high, 6.0m wide across the bridge and 7-11m wide along the bridge. The lower pylon is 37.5 meters high, 9.2 to 12 meters wide across the bridge and 17 to 25 meters wide along the bridge. The side tower is 165.3 meters high, 6.0 meters wide across the bridge and 8.0 to 10.0 meters wide along the bridge.

 

The span of the main bridge of the right branch is (38 + 82 + 2 × 260 + 82 + 38) m, with a total length of 760 M. The total height of the middle tower is 106m, the height above the bridge deck is 76m, the total height of the side tower is 88m, and the height above the bridge deck is 61m.

 

Operation

Fare system

In 2019, the people's Government of Ma'anshan City will reduce and remit tolls for small buses with 7 seats or less passing through Ma'anshan Yangtze River Bridge. From the existing Ma'anshan Yangtze River Bridge 7 and below minibus highway City toll 35 yuan per vehicle, reduced to 20 yuan per vehicle. Among them, Caishiji to Taibai Island section is 5 yuan per train, which is free after reduction; Taibai Island section to Zhengpu port section is 30 yuan per train, which is 20 yuan per train after reduction; Caishiji to Zhengpu port section is 35 yuan per train, which is 20 yuan per train after reduction. In addition, the current Anhui traffic card can also enjoy a certain discount, and the public's traffic cost will be reduced on the basis of the reduction policy.

 

From January 1, 2020, the urban toll of "Wan e" class I minibus of Maanshan Yangtze River Bridge will be reduced from 35 yuan per train to 0 yuan.

 

Construction achievements

Technical problems

Construction problems

1. The location of Ma'anshan Yangtze River Bridge is controlled by the river bed width, hydrology, geology and other factors. If the suspension bridge with main span greater than 1600 meters was selected, there were only two such long-span suspension bridges built abroad at that time, and there was no precedent in China.

2. Suspension bridge is a kind of flexible structure. Under the action of vehicle load and wind load, the stiffening beam and main cable will displace in the longitudinal and transverse direction, which is caused by the asynchronous movement of cable and beam. It will make the sling bending and fatigue, and the maintenance risk of super long span suspension bridge in the operation process is large.

3. The anchorage of suspension bridge is one of the key projects. The construction of anchorage is difficult, dangerous and costly. In particular, the geological condition of Maanshan Yangtze River Bridge is poor. The deepest overburden layer is 80 meters, and the anchorage engineering is huge.

4. Other technical problems need to be overcome, such as the construction technology of super long bored pile, the construction of super-high cable tower and wind resistance in construction stage, the nonlinear problem of super long span suspension bridge, and the erection of superstructure of main bridge.

 

technological innovation

1. The method based on catastrophe theory is established for comparison and selection of bridge types, which not only meets the navigation requirements under complex hydrogeological conditions, but also improves the existing regional landscape.

2. The non drift structure system and steel-concrete composite middle tower are adopted to improve the safety factor of anti sliding stability of the main cable in the saddle groove on the top of the middle tower, solve the problem of insufficient anti sliding stability of the main cable in the saddle groove on the top of the middle tower of the three tower suspension bridge, and ensure the stability and stress safety of the bridge system.

3. A series of researches on the construction technology of three tower continuous span suspension bridge are carried out. The research results include: new technology of steel box girder hoisting considering accurate manufacturing and balanced hoisting, remote control airship erection technology, erection construction method of suspension bridge cable strand double wrapping belt and new type puller anti torsion method, construction method of super-high reinforced concrete cable tower annular joint cutting and gradient maintenance, arch reinforced concrete tower The construction methods of column variable curvature formwork and steel-concrete composite tower column speed up the construction progress, ensure the construction quality and improve the construction accuracy.

4. A complete set of steel bridge deck pavement technology based on the integrated mode of construction, management and maintenance is adopted. The steel bridge deck pavement area is 72000 square meters, the steel bridge deck pavement quality is good, and the technical and economic advantages are significant.

 

technological achievements

Honorary recognition

Value significance

The construction of Maanshan Yangtze River Bridge strengthens the economic ties between Anhui Province and the Yangtze River Delta, and plays an important role in accelerating the economic integration and balanced development of the Yangtze River Delta and its surrounding areas. < I (review of bridge construction) < / I

 

Address: Ma'anshan City, Anhui Province

Longitude: 118.339126

Latitude: 31.397019

Chinese PinYin : Ma An Shan Zhang Jiang Da Qiao