Sancha River Grand Bridge

　　Introduction      The magnificent and spectacular Sancha River Grand Bridge on the Qinghai-Tibet Railway stands on the northern side of the famous Yuzhu Mountain peak. It is located at the confluence of the Xiaonanchuan and Niuyougou valleys on the Qinghai-Tibet Plateau, and is the highest bridge along the entire Qinghai-Tibet Railway. The bridge sits at an altitude of over 3,800 meters, has a total length of 690.19 meters, and its deck is 54.1 meters above the valley floor. It consists of 20 piers, 17 of which are circular thin-walled hollow piers, with the thinnest part of the pier top wall being only 30 centimeters.    

　　 Golmud, Qinghai