Construction Technology of Deep Hole Presplitting for High Side Wall of Main Transformer Tunnel in TB Hydropower Station
The excavation and support quality of the main transformer tunnel in hydropower stations play a decisive role in its structural safety.The excavation of the high side wall of the main transformer tunnel is limited by conventional construction equipment and techniques,making quality control difficult.By optimizing and improving conventional construction equipment and techniques,deep hole presplitting construction technology is adopted for the excavation of high side walls in the main transformer tunnel of TB hydropower station.It can achieve the effects of smooth excavation contour lines,no staggered joints,excellent overall forming quality,reduced technical overexcavation,and overall stability of the surrounding rock of the tunnel.
hydropower stationmain transformer holehigh side walldeep hole presplitting
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