超高土石坝块石料场边坡支护勘察设计

Survey and Design of Slope Support for Block Stone Quarry of Super High Earth-Rock Dam

事实证明,随着大坝填筑量上升,料场富余系数就越大,因此,可将料场中下部开挖坡比放缓,减少支护工程量,甚至可以不支护。针对高山峡谷区工程地质性状极差的强卸荷带内松动岩带,因地制宜地以极少的代价采取清除及绕避办法成功地进行了处理。最终确保了块石料场边坡稳定和施工安全,使大坝填筑提前6个月完成,又大大节约了支护工程量。

It has been proved that with the increase quantity of dam filling,the allowance coefficient of the quarry will be larger.Therefore,the excavation slope ratio of the middle and lower part of the quarry can be reduced so that the amount of support works can be reduced,or even no support can be provided.In view of the loose rock zone in the strong unloading zone with poor engineering geological properties in the high mountain canyon area,the removal and avoidance methods were successfully carried out at a very low cost in accordance with local conditions.Finally,the slope stability and construction safety of the quarry are ensured,the dam filling is completed 6 months in advance,and the support work quantity is greatly saved.