【Bridge Tunnel Innovation Week Exploration】 Wufeng Mountain Mango River Special Bridge

▲ The overall aerospace photo of the bridge

my card

Name: Wufeng Mountain Mangu River Special Bridge

Birthday: July 1, 2021 (Jianqiang opened to traffic)

Native: Jiangsu Province

Level: Main Bridge (77+3 × 130+82) rice

Type: Pre -stress concrete rigidity integrated continuous beam combination system bridge

Features: At present, the deepest steel plate pile coffin foundation in the country

Construction unit: Jiangsu Provincial Transportation Engineering Construction Bureau

Design Unit: Huaishu Design Group

Construction unit: China Railway Fourth Bureau Group Co., Ltd.

The Mangui River Bridge is an important part of the Wulifeng Mountain Crossing Crossing North -South Highway Wiring Project. It is one of the key control projects of the entire road wiring project. The north bank of the bridge is Binjiang New City, Jiangdu District, and the south bank is Touqiao Town, Guangling District. The route is nearly 2 kilometers in length.

My unique place

The bridge span the Yangtze River (Mangui River) in the Yangtze River, located in the tail of the Huaihe River. It is an important river channel for the Huaihe River to enter the river. According to the requirements of the water conservancy administrative license approval, no coffee weir temporary structure shall affect the safety of flood during the flood season. It is necessary to achieve the comprehensive completion of the infrastructure of the inheritance period in a flood season, the pier body water, and the removal of the coffin, and the construction organization is difficult. The water depth of the bridge is about 14m, and the deep -water foundation pit is excavated by 23M in the deep water foundation pit. During the construction period, the water difference between the coffin in the coffin of the coffin is 19m. project. After comprehensive selection of the three schemes of double -wall steel coffin, steel plate pile coffin, and lock -locking steel pipe pipe pipe pipe pipe pile stump, the 36M ultra -long steel plate pile pile coffin was used for deep water foundation construction. Set steel board pile coffin system.

▲ Construction of continuous beams

▲ T beam set up

▲ Hanging basket construction

In response to the characteristics of the project, the project innovation and construction technology, propose the construction concept of pumping and pumping after support, study from steel plate piles, internal support installation, foundation concrete construction, construction monitoring and other processes, and use remote intelligent monitoring technology to strengthen construction construction Real -time monitoring of stress and deformation in the process has been successfully applied on the Mangui River Bridge.

1. Innovation point one

For the first time, the design method and deformed control technology based on the steel plate pile coffin of the minimum deformation and minimum strain energy theory are proposed.

▲ Underwater foundation concrete pouring

▲ Chengtai concrete pouring

▲ After the pouring of Chengtai is completed

2. Innovation point two

For the first time, the overall internal support construction process of the steel plate pile coffin was supported first, and the technical difficulties of the construction of steel plate pile coffin under the conditions of large water head differences were solved.

▲ Deepwater basic steel plate pile coffin construction construction

3. Innovation point three

A combination structure system of H -shaped steel and Larson steel plate piles is proposed, which reduces the tension and deformation of the locks between the steel plate piles, and effectively improves the overall stiffness and anti -impact capacity of the steel plate pile coffin.

▲ Internal support of the overall temporary installation

▲ Overall aerosphere

Through the innovative application of the above technology, a single steel plate pile coffin has a cost of 4.73 million compared with the double -wall steel coffin, saving 36 days. As the largest deep -water basic steel plate pile pile coffin in China, the successful application of the deep -water foundation ultra -long steel pile pile coffin in the Mangui River Bridge, expand the application depth of the steel plate pile coffin, and formed a set of deep -water basic ultra -long steel plates. The construction technology of the pile coffin provides a new comparable selection solution for the construction of a bridge project.

Connecting the most convenient cross -crossing channel connecting the Beijing -Tianjin -Hebei and the Yangtze River Delta

The Wulifeng Mountain Crossing Channel North -South Highway Wiring Project on the Mangui River Bridge starts from the cross from the G2 Beijing -Shanghai Expressway and the G40 Shanghai -Shaanxi Expressway. After crossing the Yangtze River, it is separated from the railway bridge. It stops the cross from the Greater Port Hub, which is crossing the high -speed and Jiangyi high -speed speed of Taizhen. It is the most convenient cross -crossing channel connecting the Beijing -Tianjin -Hebei region and the Yangtze River Delta region. The completion of the project is of great significance for promoting the integration of cross -river integration, promoting the construction of Yangtze River urban agglomeration and the integration of Ningzhen Yang, and exploring the direction of green smart highway construction.

▲ The overall aerospace of the bridge

Manuscript Support/China Railway Fourth Bureau Group Co., Ltd.

Edit / Li Tianying

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