The Sujiaba Overpass is the tallest ramp bridge in any city in the country, with a height of 72 meters. Located in the Nan'an District of Chongqing, it is connected to the north end of the Caiyuanba Bridge. The construction of the overpass is mainly to solve the 30-meter height difference between Caiyuanba Bridge and Haitong Road, using a spiral line to connect. From a distance, the thin beams, towering piers, and the spiral ramp with large radius are like a roller coaster in an amusement park. After entering the overpass by car, if you put your head against the window, you feel as if you are hung in the air, your heart is tight, your legs are soft, and it is irritating like riding a roller coaster. According to many drivers, every time they drive through the Sujiaba overpass, they will be frightened once.
The Sujiaba overpass has also become the location of many movies.
The Jiaba Overpass, together with Nancheng Overpass and Nancheng Tunnel, form a three-dimensional traffic system, supporting the south end of Caiyuanba Bridge.
Driving from the north bank of the Caiyuanba Bridge to the south bank, there is an amazing spiral overpass on Haitong Road in Nan'an District, with thin beams, tall piers, and a large radius spiral ramp. After entering the overpass by car, The beauty seen from this height is amazing. This is the highest ramp bridge in China, the Sujiaba Overpass, which has been selected by many movies for shooting and nicknamed a roller coaster by Chongqing citizens.
Since the seemingly thrilling Sujiaba Overpass was completed and opened to traffic in 2005, there has been no traffic accident so far.
According to reports, the Sujiaba Overpass, together with the Nancheng Overpass and Nancheng Tunnel, form a three-dimensional transportation system, supporting the south end of the Caiyuanba Bridge. In order to resolve the 30-meter height difference between the Caiyuanba Bridge and Haitong Road, a spiral extension line was used to connect, and finally the 72-meter-high ramp bridge in the country, the highest ramp bridge in the country-Sujiaba Overpass.
"Don't underestimate this spiral overpass, its technical content is very high." The interviewee said that if the car enters the overpass from the Caiyuanba Bridge, the car will experience several states of deceleration, uniform speed, and acceleration. Each state , The driver and passengers feel very comfortable and stable. This is because the hospital took into account the driving characteristics of the car when designing the ramp alignment, simulated various conditions of the vehicle driving on the overpass, and adopted the most optimized design plan.
The spiral shape of the overpass is similar to an elliptical linear structure. According to the driving state of the car, it adopts a cyclotron curve with a small radius of 60 meters and a large radius of 100 meters. Its curvature is constantly changing, combined with the change of the super-high cross slope of the bridge deck, thereby reducing The effect of centrifugal force on the car makes passengers feel very comfortable. For this reason, since the Sujiaba Overpass was completed and opened to traffic in 2005, there has not been a traffic accident so far, and it has become a model of urban interchanges in China.
