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沪昆高铁贵昆段沙坡特大桥线路左侧多处危岩落石对大桥构成一定威胁。本文在对区域地质环境和危岩体结构特征的调查的基础上,利用无人机航拍技术,查明了沙坡双线特大桥左侧山坡坡顶裂缝及围岩体的分布,研究了该处危岩落石体的形成的机制,并提出了采用梯形垛反压、清方、灌浆以及局部支挡的防治措施,取得了良好的经济效益,同时保障了沪昆客专安全、有序运营。
Several sections of dangerous rockfalls on the left side of the Shapotou Bridge over the Kunming section of Shanghai-Kunming high-speed railway pose a certain threat to the bridge. Based on the investigation of the regional geological environment and the structural features of dangerous rock masses, the paper uses the technology of UAV aerial photographing to find out the distribution of the cracks and the surrounding rock bodies on the hillside on the left side of Shapo double-girded bridge. At the same time, the mechanism of the formation of dangerous rock falling body is put forward, and the prevention and control measures by using trapezoidal stack backpressure, cleanup, grouting and partial support are put forward, and good economic benefits are obtained. Meanwhile, the safety and orderly operation of Shanghai- .