西大洋水库正常溢洪道岩体开挖施工技术控制

Construction Technology Control of Normal Spillway Excavation in Xidayang Reservoir

西大洋水库正常溢洪道开挖地质条件复杂，岩石节理裂隙发育，左岸开挖区紧临村庄，对爆破安全，级配碎石开采和边坡质量控制都造成了不利影响。在施工中通过采用边坡预裂爆破技术，建基面一次爆除技术，级配碎石开采技术，爆破出了合格的级配碎石料，保证了边坡的开挖质量，确保了工期，取得了较好的效果。

In the engineering of normal spillway excavation of Xidayang reservoir, there are some difficulties for the blasting safety, graded broken stone mining, and slope quality control because of complex geological conditions, fractured rock joint, and close to villages of the left bank. It en-sured the excavation quality of the slope and the construction period, and got qualified graded broken materials, through pre-blasting technology in slope, blasting technology in base surface, and graded broken stone mining technology.