Measures for Dealing with Collapse of Radial Gates and Vertical Shafts in Mountainous Areas under Poor Geological Conditions
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.
vertical shaft of radial gateroof collapseanchor pileconcrete beamconsolidation grouting
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