Introduction of Hummer Yangtze River Bridge in Chongqing?

Machangjiang Bridge, also known as the Fourth Wanzhou Yangtze River Bridge, is located in the main urban area of Wanzhou, with the north bank starting from Diaolong Village, Xuma Town, Wanzhou District, Chongqing, and the south bank ending at Xiangping Village, Tailong Town, Wanzhou District, Chongqing. It is the Yangtze River Bridge with the longest span in the Three Gorges reservoir area. Ma Xu Yangtze River Bridge is a control project of Wan Li Expressway. The total length of the bridge is 2030m, and the main span is1050m. It is a single-span steel box girder suspension bridge. It is estimated that the construction will be completed by the end of 20 16.

201165438+1October 15 The main bridge of Chongqing Wanzhou Hummer Yangtze River Bridge, which was built by China Communications First Public Security Bureau, was successfully completed.

design parameter

Chongqing Hummer Yangtze River Bridge has a total length of 2030m and a main span of 1050m. Crossing the river once, the main bridge is a 300m+ 1050m +300m single-span steel box girder suspension bridge, and the approach bridge is 77.5m+154m+77.5m continuous rigid frame +6×30m.

background information

Wan Li Expressway is jointly owned by Chongqing Expressway Group Co., Ltd. and Wan Li Wanda Expressway Co., Ltd., and is established by BOT+EPC. Wanzhou District is responsible for land acquisition and demolition, public security management and coordination services. The estimated total investment of the project is 8201.6 million yuan (including the estimated investment of Hummer Yangtze River Bridge 1.54 million yuan). The project * * * needs to requisition 4860.79 mu of land (430 mu of collective land and 559.37 mu of state-owned land), involving 8 towns (streets), 26 villages, 159 groups, economic development zones and demolition 1050 households/.

Wanli Expressway starts from Ma 'anshi of Wan Yun Expressway, passes through Xiongjia Town, Bell and Drum Tower Street, Tailong Town, Chenjiaba Street, Wuqiao Street, Economic Development Zone, Changling Town, Changtan Town and Tianjiayakou of Longju Town, and connects with Lichuan City, Hubei Province, with a total length of 94.15km. Wanzhou has a total length of 5 1.83km, and there is a Ma Xu Yangtze River Bridge. Wanzhou has 32 bridges11789m/20 tunnels 16934 m /20, and the bridge-tunnel ratio is 52.27%. There are five general interchanges in Maanshan Hub (Princess Interchange, Jiangnan Interchange, Wuqiao Interchange, Changtan Interchange and Longju Interchange) and 6544 Interchange.

Wanli Expressway is expected to be completed on 20 17. According to the person in charge of the construction headquarters of Chongqing-Wanzhou Expressway, Chongqing-Wanzhou Expressway is one of the ten important branches of Chongqing expressway network, which is a fast lane for land traffic in northeast Chongqing and an important road for western Hubei to enter Chongqing and Sichuan.

construction progress

As of April 20 15, 19.

North Bank: The main tower column has been completed117m, with a completion rate of 55.6%. 37.5% of the anchorage foundation has been completed, and the foundation of loose cable saddle pier has been completed, and the construction of loose cable saddle pier is under way.

South Bank: Construction of main tower column is completed. The tunnel anchor has completed the excavation of the tunnel body and is turning to the construction stage of the anchor room. The foundation of loose cable saddle pier has been completed, and the construction of loose cable saddle pier is under way.

On June 8th, 20 13 and 18, the construction unit of Hummer Yangtze River Bridge on Wan Li Expressway (the first public office of CCCC Construction and Construction Group) officially entered the red line at the north bridge head of the bridge to carry out pavement cleaning construction. At the same time, it also marks the official start of the construction of Sima Yangtze River Bridge, a high-speed control project in Wan Li, with an estimated total investment of 65.438+54 billion yuan.

Construction of south bank cable tower

In the south bank work area of Hummer Yangtze River Bridge, a high-speed control project in Wan Li, the tower column of the bridge is being stepped up. The south bank tower, with a height of166.57m, is a portal frame structure, and the south bank anchor ingot is constructed in the form of tunnel anchor. Part of the approach bridge is a continuous rigid frame bridge, and the other part is a simply supported continuous beam T-beam bridge.

Cable tower construction is difficult and requires higher quality. High pier construction is the key and difficult point of the whole bridge. The whole lower beam is poured to 1 120 cubic meters, and it needs to be poured twice, so it can be said that the construction technology requirements are very high.

The construction of bridge approach pile foundation and anchor ingot are also advancing simultaneously. The cable tower construction adopts the advanced and mature climbing formwork construction in China, which can automatically demould during the construction process to ensure the continuity of climbing. As long as there are construction workers operating on it, it can guarantee 24-hour uninterrupted construction.

The south main tower has been capped.

The south main tower is capped, and the north main tower is expected to be completed in September 2065438+2006.

The north bridge head of Ma Xu Yangtze River Bridge is located in Diaolong Village, Ma Xu Town. At the construction site, two giant columns as high as 1 17 meters stand on the shore. At the same time, the construction of gravity anchor pile protection, cable tower pile foundation, approach bridge pile foundation, main tower cap, anchorage and other ancillary facilities has been completed.

"The bank at the north bridge head is italicized. Anti-slide piles should be driven before construction. At the same time, there are high-voltage cables on the construction site of the north main tower, which need to be relocated. These two projects took several months, so the progress on the north shore is slower than that on the south shore. " Qu Jialin, deputy chief engineer of the work area, introduced that the planned height of the north main tower is nearly 50 meters higher than that of the south main tower, which is 2 10.5 meters.

"The suspension bridge has only two main piers, and the bridge deck is fixed by suspension cables, which need to be fixed by gravity anchors. Gravity anchors are difficult to beat. Although there is only one, it needs 70,000 cubic meters of concrete, with a total weight of 6.5438+0.4 million tons. It is not easy to pour such a large concrete gravity anchor. " Qu Jialin said that the gravity anchor is like a pyramid, and it takes more than 50 hours to pour at a time. If the temperature is not well controlled, it will crack or the stress level will not reach the standard. It is relatively more difficult to pour in large quantities. Usually there are three shifts, and the first two shifts have to work 24 hours a day. Managers must personally supervise the pouring process, and no mistakes can be made. The north main tower is expected to be completed in September 2065438+2006.

2016165438+1October 15 Hoisting the last steel box girder of Hummer Yangtze River Bridge in Wanzhou, Chongqing. On the afternoon of the same day, after nearly 8 hours of hoisting, the last steel box girder of the main bridge of the bridge was successfully put in place, and the main bridge of Hummer Yangtze River Bridge was successfully closed.

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