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I. Project Overview
The Nanjing Second Yangtze River Bridge is one of the key construction projects of the National “Ninth Five-Year Plan†and is located 11km downstream of the Nanjing Yangtze River Bridge. The Nanjing Yangtze River Bridge, approved by the state, consists of “Two Bridges and One Road†with a total length of 12.517km. Among them: Nanxun Bridge is a five-span continuous steel box girder cable-stayed bridge with a main span of 628m. The total length of the bridge is 2938m, ranking first in China and the third in the world in the same type of bridge type. Beibei Bridge is a five-span continuous prestressed continuous girder bridge with a main span of 3l65m continuous girder bridge with a length of 2172m. It ranks first in Asia; it is the leader of the Eight Diagrams, with a total length of 5.698km. Jiangsu Province approved a total of 8.83km of South and North leads for the Second Bridge. All wires provided Interchange 4, separation interchange 4, 4 bridge, the bridge 8, the bridge 17, culvert channel 62, the total amount of earth subgrade 3,800,000 m 3. The static investment estimate for the entire project is 3.35 billion yuan, and the Ministry of Communications has approved the construction period of 4 years. The project was officially started on October 6, 1997 and is scheduled to be completed and opened to traffic on July 1, 2001.
The construction standard of Nanjing Second Bridge is 335m wide and 32m wide. It is a six-lane expressway with a design vehicle of 100km/h. The design load is: steam one super 20, hanging one 120. The design wind speed is 20m high in the bridge area. In the first 10 minutes, the average maximum wind speed is 32.6m/s. The bridge pier is 27000kN according to the ship impact load, and the cross-flow direction is 13500kN. The earthquake resistance is 7 degrees, and the navigation clearance is 24m. The design flood frequency: the bridge is 300 years. The roadbed is once in 100 years.
The construction of the Second Bridge in Nanjing not only increased the new river crossing channel to the four national highways 104, 205, 328, 312, but also the Ninglian, Ningtong First Class Highway, Nanjing Ring Road, New Airport Expressway and Shanghai. The Ning Expressway is integrated into one, which makes the Nanjing highway traffic basically form a “outside the cityâ€, thus improving traffic congestion and effectively alleviating the “difficulty of crossing the river†in Nanjing.
After more than 30 months of construction, the Nanjing Second Bridge was completed on July 9, 2000. The Beibei Bridge also realized Helong in mid-August. All the leads have been paved in the asphalt layer. The system, traffic engineering and greening are all intensified, and the supporting affiliates such as Erqiao Park have also been fully launched. According to the current progress, the entire Nanjing Second Bridge can be completed at the end of 2D00 and complete the main project.
2. Introduction to the organization and management of Nanjing Second Bridge Construction
1. The organization and management system of Nanjing Second Bridge Construction: Nanjing Yangtze River Second Bridge Construction Headquarters and Nanjing Changjiang Second Bridge Construction Co., Ltd., operating in accordance with the "two brands, one team" approach, the construction headquarters as two The owner of the bridge construction project is the dispatching agency of the Nanjing Municipal People's Government. It specifically organizes and implements the second bridge construction and governance. This reflects the importance attached by the municipal party committee and the municipal government to the construction of the second bridge, and also facilitates the reflection of major infrastructure projects in the construction process. The government's behavior enables the project to enjoy the preferential policies that the government can give. At the same time, in order to meet the needs of the socialist market economy, the headquarters is also the construction of a limited liability company. It is the main body of the investment corporation of Nanjing Second Bridge, and is specifically responsible for the construction of financing and financing.
Nanjing Second Bridge Construction Headquarters has the chief engineer, office, planning office, engineering supervision department, finance department, material department, development department and other functional departments. The Engineering Supervision Department, Planning Department, Materials Department, Office and Finance Department within the Nanjing Second Bridge Construction Command are both the functional offices of the headquarters and the offices of the director's office, performing some functions of the director office of the Nanjing Second Yangtze River Bridge. . The director's office is responsible for the governance and coordination of the bidding supervision teams. The contractor is responsible for the specific governance and coordination of the bidding supervision teams.
2. Fund raising and budgetary control of the Second Bridge Command: Nanjing Second Bridge has a total static investment of 3.35 billion yuan by the state and the province, 8.5 billion yuan from the Ministry of Communications and the Provincial Communications Department, and 500 million in the city. The rest are mainly using banks. Loan and social financing, is currently purchasing the main sponsors with the Second Bridge Construction Headquarters, and other home investment companies are planning to set up Second Bridge Co., Ltd. to be responsible for the financing of the remaining funds of the Second Bridge Project, and as an investment entity, to participate in the future Nanjing Investment and governance of major infrastructure projects.
We control the cost through strict supervision, strict bidding, strict control over the change of super standards and careful calculation of all aspects. So far, all of our individual projects have not exceeded the nationally approved budget estimates.
3. Purchase and supply of construction materials for the Second Bridge Command; Nanjing Changjiang Second Bridge has a static total investment of 3.35 billion yuan, and its material costs account for more than 60%. The quality of building materials is directly related to the quality of Nanjing Second Bridge. In order to ensure the organization and supply of Nanjing Second Bridge materials, especially to ensure the quality of the main materials, the Materials Department is responsible for the supply of a large number of building materials for the Second Bridge.
As the sole procurement organization for the supply of materials, the Materials Department mainly supplies steel, steel strands, cement, timber, bearings and other major structural materials. In addition, for a large number of construction materials, we rely on familiar conditions and good qualifications, and actively assist the construction units to conduct investigation and procurement, and play an organizational and coordination function.
For the supply of A, we take the following measures to ensure the supply, ensure the quality of the materials: implement a strict pre-qualification system; implement the second bridge material procurement network; implement bidding, select the supplier to choose the best; strengthen the planning of the supply of materials Timeliness; the quality assessment standard for highway engineering is a good grade project with a score of 90 or more, and the design and construction management of the Nanjing Second Yangtze River Bridge has reached the domestic first-class advanced level.
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