Jiangyin Bridge

Jiangyin Yangtze River Highway Bridge

synonym

Jiangyin bridge generally refers to Jiangyin Yangtze River Highway Bridge

Jiangyin Yangtse River Highway Bridge Bridge, referred to as "Jiangyin Bridge", is a river crossing channel connecting Taizhou City and Wuxi City in Jiangsu Province of China. It is located on the Yangtze River waterway. It is a key construction project during the Ninth Five Year Plan period in China. It is the "throat" project of Tongjiang Sanya National Highway trunk line and Beijing Shanghai national highway trunk line in the main framework of China's "two vertical and two horizontal" highway.

The construction of Jiangyin Yangtze River Highway Bridge started on November 22, 1994, and the commencement ceremony was held;

The closure project was completed on April 21, 1999, and the bridge was put into operation on September 28, 1999.

Jiangyin Yangtze River Highway Bridge starts from jingjiangnan interchange in the north, crosses the Yangtze River Waterway in the north and ends at Jiangyin North interchange in the south. The total length of the line is 3071 meters, and the total length of the main bridge is 1385 meters. The bridge deck is a two-way six lane Expressway with a design speed of 100 km / h. The total investment of the project is 3.625 billion yuan.

Construction process

On November 22, 1994, the construction of Jiangyin Yangtze River Highway Bridge started, and the commencement ceremony was held.

On August 30, 1995, the construction technology seminar of Jiangyin Yangtze River Highway Bridge bid a project was held.

On January 18, 1996, Jiangyin Yangtze River Highway Bridge carried out the south tower and anchor project of the bridge; on July 29, Jiangyin Yangtze River Highway Bridge completed the construction of bored piles.

On May 22, 1997, Jiangyin Yangtze River Highway Bridge completed the sinking of Caisson in place; on June 5, Jiangyin Yangtze River Highway Bridge completed the concrete pouring of caisson capping; on July 25, Jiangyin Yangtze River Highway Bridge completed the concrete pouring of tower column; on August 13, Jiangyin Yangtze River Highway Bridge completed the concrete pouring of upper beam of bridge tower; on October 22, Jiangyin Yangtze River Highway Bridge completed the concrete pouring Bottom sealing reinforcement and backfilling of open caisson;

On August 23, the South Main Tower of Jiangyin Yangtze River Highway Bridge was capped;

On February 25, 1998, the main cable erection of Jiangyin Yangtze River Highway Bridge was carried out and the erection ceremony was held;

On March 14, the North Anchor project of Jiangyin Yangtze River Highway Bridge was completed.

On February 9, 1999, the steel box girder of the first section of Jiangyin Yangtze River Highway Bridge was hoisted in place; on April 21, the closure project of Jiangyin Yangtze River Highway Bridge was completed and the whole bridge was connected; on September 14, the Jiangyin Yangtze River Highway Bridge passed the handover and acceptance;

On September 28, Jiangyin Yangtze River Highway Bridge was opened to traffic.

On December 19, 2018, Jiangyin Yangtze River Highway Bridge was demolished.

Bridge location

Jiangyin Yangtze River Highway Bridge is located in the middle of Yangtze River Delta and southeast of Jiangsu Province, connecting Jingjiang City of Taizhou City and Jiangyin City of Wuxi City. The bridge starts from Jingjiang Jiangnan interchange of Jingjiang City in the north, crosses Yangtze River Waterway in the north, and ends at Jiangyin North interchange of Jiangyin City in the south. It passes through Beijing Shanghai expressway.

Architectural design

building structure

Overall layout

Jiangyin Yangtze River Highway Bridge is composed of main bridge, two pylons, cables, anchorages on both banks, approach bridges and Interchange Ramps; the main bridge section is arranged from northwest to Southeast.

 

Design features

Design parameters

Jiangyin Yangtze River Highway Bridge is 3071 meters long, and the main bridge is 1385 meters long, with a span of (336.5 + 1385 + 309.34) meters. The steel box girder of the main span bridge deck is 3 meters high and 32.5 meters wide, with a total width of 36.9 meters. The height of the cable tower is about 190m. There are 96 bored piles with a diameter of 2m on the supporting rock surface of the North Tower and 24 bored piles with a diameter of 2.8m on the south tower. The diameter of main cable steel wire is 5.35mm, and the tensile strength is 1600 MPa. The middle span of each main cable is composed of 169 strands and 127 steel wires per strand, and the side span back cable is 8 fixed. The diameter of middle span main cable is 864mm, and the rise span ratio is 1 / 10.5. The suspender spacing is 16m.

 

Equipment and facilities

lighting

Jiangyin Yangtze River Highway Bridge is equipped with several long pole street lamps on the bridge deck, and night landscape lamps are installed at the cable and cable tower to facilitate traffic at night.

 

Electron induction

As of December 2018, Jiangyin Yangtze River Highway Bridge has been equipped with an electronic induction gantry and replaced with a new card with built-in sensing technology to facilitate vehicles passing between the two places.

 

Operation

Fare system

On January 1, 2020, Jiangsu Province will cancel the provincial boundary toll station and implement the new highway vehicle toll standard. The toll standard of Jiangyin Yangtze River Highway Bridge is as follows:

Traffic matters

1. It is forbidden for pedestrians, non motor vehicles, motorcycles, tractors, special vehicles for the disabled, tracked vehicles, agricultural vehicles, special wheeled machinery, all Trailer trains, vehicles with test plate and training plate, and motor vehicles with design speed less than 70 km / h to pass on Jiangyin Yangtze River Highway Bridge.

2. In case of severe weather conditions, traffic control will be implemented on Jiangyin Yangtze River Highway Bridge to restrict or prohibit the passage of vehicles.

 

traffic flow

As of December 2018, Jiangyin Yangtze River Highway Bridge has passed 81000 vehicles per day, up to 139000 vehicles per day.

 

Construction achievements

Technical problems

The new technology application and innovation of Jiangyin Yangtze River Highway Bridge are as follows:

1. Based on the analysis of the influence of the displacement of the North Anchorage on the behavior mechanism of the whole bridge, the displacement limits of the horizontal displacement and settlement of the anchorage and the measures to control the displacement are proposed.

2. In the sinking process of the super large caisson of north anchor, drainage sinking and undrained sinking are adopted, especially in the undrained sinking, the method of combining high-pressure water flushing with submersible drilling and vacuum mud suction is adopted to improve the work efficiency. In the later stage, air curtain is used to assist sinking and correct deviation, so as to ensure the smooth sinking and accurate positioning of the caisson, In order to ensure the construction progress and erection quality of the main cable, the standard wire strand is used to adjust the cable, and the torpedo clamp is added to control the torsion; the beam assembly and pre arch matching are completed in the same production line at one time, which is a new process initiated by Jiangyin Bridge, which not only reduces the workload of interface adjustment between beam sections, but also greatly shortens the production cycle.

3. In the early stage and during the construction of Jiangyin Yangtze River Highway Bridge, 37 scientific research projects were organized, among which many projects were appraised by scientific and technological achievements organized by Jiangsu Provincial Department of science and technology, reaching the leading domestic and international level at that time

① Combined with the bridge site environment and bridge structure characteristics, the wind resistance and seismic safety problems of Jiangyin Bridge in construction and operation state are solved by using a variety of research methods and means of test and theoretical analysis. In the world, for the first time, the selection method combining flutter and mixing vibration and the minimum method of flutter derivative identification technology are put forward in the aerodynamic optimization selection of girder section Double time domain identification method: multi-point excitation is considered in seismic analysis, and dynamic time history analysis method is adopted. Successful experience has been accumulated in the compilation of relevant codes for wind resistance and earthquake resistance of bridges. ② Taking the anchorage foundation of long-span suspension bridge on complex soft foundation as the research object, based on the analysis of the composition structure, construction process and stress characteristics of the anchorage, open caisson foundation and foundation soil, the stress and deformation laws and safety and stability of the anchorage and open caisson foundation in different construction stages and operation stages are studied through test, field monitoring, numerical inversion analysis and calculation It solves the construction problem of extra large open caisson foundation.

③ Through the research on construction control of super long span suspension bridge, a set of scientific and effective construction and control technology of suspension bridge is established, which has accumulated successful experience for similar bridge construction in China in the future.

④ Through the research of toll system, monitoring system and structure monitoring system of bridge traffic engineering, the problems of bridge network toll and traffic safety control management are solved, and the management level of the bridge is improved. The project results have been widely used in many long-span bridge projects, such as Nanjing Baguazhou Yangtze River Bridge, Haicang bridge, Runyang Yangtze River Highway Bridge, etc., and good benefits have been achieved, which has been widely applied It will provide successful experience for the construction of super long span bridges in the future.

 

Honorary recognition

Cultural characteristics

Special stamps

On March 26, 2000, in order to reflect the achievements of China's bridge construction, China Post Group Co., Ltd. issued a set of four special stamps entitled "Yangtze River Highway Bridge", the fourth of which represents the majestic appearance of Jiangyin Yangtze River Highway Bridge.

Value significance

Jiangyin Yangtze River

Chinese PinYin : Jiang Yin Da Qiao