【摘要】 对核电站建设中的重点和难点问题——风化程度不均匀核岛环廊的开挖进行了探索,难点为上部边口的完整保护和环廊壁面开挖偏差的控制。福建某核电站建设的工程实践表明,预留适当保护层、分层开挖、炮孔的起爆次序、改进预裂爆破方法以及钻孔的质量是环廊开挖质量的保证。更多还原

【Abstract】 Focal and difficult points in the construction work of nuclear power station were explored,such as the nuclear island loop-corridor excavation with uneven weathering rock.The nuclear power construction project in Fujian indicated that for the unevevn weathering rocks,the excavation difficulties were that how to keep the upper edge’s integrity and how to control the surrounding surface excavated deviation.Reserveing the appropriate protective layer,stratified excavation,initiation order,presplitting improvement and perforating quality were the premises to ensure the excavation quality.更多还原