Aerial China:The high-speed Qianhaizi Double Helix Bridge on the cloud in China!中國雲端上的高速之乾海子雙螺旋特大橋！

Ganhaizi Bridge is located in Shimian County, Ya'an, Sichuan on the Ya (An) Lu (Gu) Expressway. It has a total length of 1811 meters, a bridge width of 24.5 meters, and a total of 36 spans. It is the longest steel tube truss girder highway bridge in the world. The main structure of the bridge is made of steel fiber concrete, which is the first case in the history of bridge construction in the world. Sichuan Province has the longest mileage, the largest investment, and has created many world records. So far, the Jingkun Expressway has been fully connected across the 1,045 kilometers in Sichuan Province.
After the completion of the Qianhaizi Bridge, it will drive on it as if it were in the "cloud". It was officially opened to traffic on April 28, 2012. The Jingkun Expressway, a national trunk expressway, realizes the full highway in Sichuan, shortening the distance from Chengdu to Xichang to 420 kilometers, and it can be reached by self-driving in 5 hours. This saves about half of the time compared to the past. The completed Xipan Expressway is enough, and the whole journey takes only 6 hours.
As the Ganhaizi Bridge has entered winter with low temperatures and the road surface is slippery and easy to accumulate snow, snow removal vehicles and other emergency rescue equipment will be equipped in the future. At the same time, the guardrails on both sides are 30 centimeters higher than ordinary high-speed guardrails to prevent vehicles from rushing out of the bridge. In addition, the piers of the bridge also adopted a unique air pipe design, which reduced the weight of the piers. The seismic intensity of the bridge was designed to be 9 degrees.