川青铁路尖扎黄河特大桥施工绳索断裂事故致12人死亡 4人失联

Core Viewpoint - The article reports a tragic accident during the construction of the Qianzhai Yellow River Grand Bridge, resulting in multiple casualties and highlighting the risks associated with large-scale infrastructure projects [1][4]. Group 1: Incident Details - On August 22, a steel strand broke during the tensioning operation, leading to the fall of 16 workers, with 12 confirmed dead and 4 missing as of 6 PM the same day [1]. - The Qinghai Province has initiated a level three emergency response to manage the situation [1]. Group 2: Project Overview - The Qianzhai Yellow River Grand Bridge is constructed by Lanzhou-Xinjiang Railway Gansu-Qinghai Co., Ltd., designed by China Railway First Survey and Design Institute Group Co., Ltd., and built by China Railway Bridge Bureau Group Co., Ltd. [4]. - The bridge features a continuous steel truss arch design with spans of "141 meters + 366 meters + 141 meters," totaling 648 meters, recognized as the "world's first span" railway continuous steel truss arch bridge and the first railway steel truss arch bridge crossing the Yellow River in China [4]. Group 3: Construction Progress - As of June 14, the temporary steel structure tower for the bridge was successfully topped out, laying a solid foundation for the main span steel beam closure, which was scheduled for completion in August [4].