早强砂浆预应力锚杆在水电站地下厂房围岩支护中的应用

Application of Early Strength Mortar Prestressed Anchor Rod in Surrounding Rock Support of Underground Powerhouse in Hydropower Station

依托某引水发电系统水电站地下厂房工程,通过预应力长锚杆支护施工,采用高强砂浆进行锚固,减少了与其他作业间的干扰,缩短了支护工期,迅速有效的抑制了因大跨度洞室开挖后引起施工过程中的围岩变形,恢复围岩的整体受力状态,提高了洞室开挖后的整体稳定性,有效保障了施工及运营期安全。

The underground powerhouse project of a water diversion and power generation system hydropower station is supported by prestressed long anchor rods and anchored with high-strength mortar.It reduces interference with other operations,shortens the support period,quickly and effectively suppresses the deformation of the surrounding rock caused by the excavation of large-span caverns during the construction process,restores the overall stress state of the surrounding rock,improves the overall stability of the caverns after excavation,and effectively ensures construction safety and operation period.