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通过工程地质测绘、钻探、平硐及岩土测试等勘察工作,查明青石梁滑坡体积约81万m~3,为中型岩质顺层滑坡,现状整体处于基本稳定性状态。水库运行后或建坝前后叠加暴雨久雨滑体饱水等多种工况下,滑坡整体基本上处于欠稳定—不稳定状态,为此滑坡需要采取工程治理措施。经比较,建议结合大坝二期围堰建设对滑体中部、后缘予以削方减载(用作围堰填筑土料),使滑坡稳定达到安全标准。
Through geological surveying, drilling, adit and geotechnical testing, the Qingshuiliang landslide has been found to have a volume of about 810,000 m ~ 3. This is a landslide of moderate rock quality and the status quo is basically in a stable state. Under various operating conditions, such as superposition of heavy rain and heavy rainfall over the reservoir before or after the dam operation, the whole landslide is basically in a state of unstable-unstable state. Therefore, engineering treatment measures need to be taken for the landslide. Based on the comparison, it is suggested that the landslide should be trimmed and loaded (used as cofferdam filling material) in combination with the construction of the second cofferdam of the dam to make the landslide reach the safety standard.