The vertical shaft of the arc-shaped gate inside the Jiaozishan Reservoir collapsed,causing the inverted suspension on the downstream side of the shaft to become unstable,and the slope to collapse and fall.How to effectively deal with collapse,reinforce the unstable inverted suspension,prevent the inverted suspension of the shaft from collapsing again during secondary excavation,and ensure the safe operation of the gate shaft after construction is the key.In the collapse treatment,the collapse funnel inside the well is first backfilled,and then the lower rock mass is reinforced from the wellhead using a combination of concrete beams,anchor piles,and consolidation grouting.The wellbore wall is then reinforced with anchor spraying support and consolidation grouting.This measure effectively dealt with the collapse and roof collapse,and the combined support played a good reinforcing role in the collapsed body.
关键词
弧形闸门竖井/塌方冒顶/锚筋桩/混凝土梁/固结灌浆
Key words
vertical shaft of radial gate/roof collapse/anchor pile/concrete beam/consolidation grouting
维普
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