李家岩水库坝肩砾岩开挖施工技术

Conglomerate Excavation Technology of Dam Abutment of Lijiayan Reservoir

李家岩水库作为成都市的第二生活水源地,其大坝坝肩围岩以砾岩为主,岩石较软,且其砾岩边坡开挖无施工道路达到顶部开口线、无可借鉴的爆破参数。阐述了最终通过修建陡坡毛路以及不断调整、优化爆破参数的方式,圆满地完成了施工任务,所取得的经验值得类似工程借鉴。

Lijiayan reservoir is the second domestic water source in Chengdu.The main surrounding rock of the dam abutment is conglomerate.The rock is relatively soft.During the excavation of conglomerate slope of lijiayan reservoir,no construction access road available to the top of excavation boundary,and no blasting parameters to be used for reference,neither.Finally,the construction task was successfully completed through the construction of steep-slope rough road and the continuous adjustment and optimization of blasting parameters,which can be used as reference for similar projects.