Changsha Sanchaji Bridge, with a total length of1.577m, is a cable-stayed bridge and the largest self-anchored cable-stayed bridge in China. Xiangjiang Sanchaji Bridge is located in the north ring of Changsha Second Ring Road. It is the largest self-anchored suspension bridge in China at present. It starts from the west side of Xiaoxiang Avenue in the west and ends at the east side of Xiangjiang Avenue in the east, with a total length of 1.442m, a main span of 328m and a side span of 1.32m, which are symmetrically arranged on both sides. The bridge consists of main bridge, tower column, suspension cable hanger, pier and deck. The main bridge is a steel box girder. Designed by Central South University and Changsha Planning Institute!

Detailed introduction

The total length of Sanchaji Bridge is1577m, in which the main bridge is 732m and the main span is 328m. The self-anchored suspension bridge with a span of 328 meters ranks first in the world among similar bridges. The Second Ring Road is 46 meters wide, with six lanes and a design speed of 60 km/h, and the road encircles the urban area of Changsha, connecting ten urban trunk roads, such as 107, 3 19, Chang-Chang Expressway, etc. Through interchanges in vertical and horizontal urban areas.

The main structure of the bridge is pulled by two huge main cables, and all the weight of the bridge is distributed on these two cables. There are also many hanging ropes on the bridge deck, and countless steel strands are distributed inside the hanging ropes. Their main function is to share the bearing capacity of the whole bridge, and to increase the service life of the bridge, so as to reduce the burden of slings. The bridge is divided into motor vehicle lanes and non-motor vehicle lanes, with a central median in the center and emergency parking lanes on both sides of the bridge deck to reserve emergency avoidance space for all kinds of accident vehicles.

Epoxy resin materials are widely used in bridge deck pavement. According to experts from China Epoxy Resin Industry Association, the deck pavement of the main span steel box girder of this bridge should be derusted by steel plate sandblasting, sprayed with epoxy zinc-rich paint for corrosion protection, made into an epoxy ring water layer for seepage prevention, and then made into a buffer layer with rubber asphalt mortar. After the buffer layer is completely completed, pour asphalt concrete, and finally spread modified asphalt and sprinkle modified emulsified asphalt. Because the foundation of the main bridge outside the main span and the east-west approach bridge is reinforced concrete, asphalt can be laid as long as the waterproof and oxygen-proof layer is well prepared when laying the bridge deck.

work progress

On April 30, 2004, the foundation stone of the bridge was laid.

On September 14, 2004, the first steel cofferdam of the bridge was floating in place.

On May 23rd, 2005, the main pier of the bridge surfaced.

On August 2, 2005, KLOC-0, the first steel box girder of the whole bridge was pushed and erected.

In 2005 10, 65438+June 2005, the prestressed concrete box girder of the first section of the whole bridge was pushed and erected.

On April 8, 2006, the steel box girder of the main bridge of the bridge was erected by pushing.

On May 9, 2006, 19, the cable installation of the main bridge began.

On June 8, 2006, the main bridge closed.

For more exclusive information about the construction industry, please pay attention to the micro-signal of the construction network in real time.

For more information about writing bidding documents and improving the winning rate, please click on the customer service at the bottom for free consultation.