由于建设条件的限制,广乐高速公路大瑶山1号隧道洞身段存在下穿福源电站水库区域。为了避免隧道发生突水、突泥等安全事故,同时尽量减少工程建设对周边原始生态环境及水库蓄水能力的影响,经过数值计算及相应施工方法论证,对近接水库段地表采取预处治措施。所实施的堵水及隔水方案效果显著,为类似工程建设提供借鉴。 Due to the restriction of construction conditions, Cave No. 1 Dayu Mountain Tunnel of Guangle Expressway exists under Fuyuan Power Station reservoir area. In order to avoid accidents such as water inrush and mud in the tunnel and to minimize the impact of the project construction on the original ecological environment and reservoir water storage capacity in the surrounding area, preconditioning measures are taken for the surface of the adjacent reservoir through numerical calculation and corresponding construction method demonstration. The implementation of the water blocking and water separation program effect is significant, to provide reference for similar projects.