溪洛渡水电站上下游土石围堰表面变形监测

Monitoring for surface deformation of earth-rockfill cofferdam in upstream and downstream of Xiluodu Hydropower Station

详细介绍溪洛渡水电站上下游土石围堰表面变形监测的测点布设与实施情况,通过对围堰变形监测数据的分析,发现围堰变形主要呈现为中间部位较大,两端较小,前期变形较大,后期逐渐稳定等特点,揭示了溪洛渡水电站围堰变形的规律,通过采取适当的措施,保证了围堰安全度汛及基坑内大坝开挖和混凝土浇筑的安全,也为今后其他工程的土石围堰监测积累了经验。

We describe the setting of monitoring points and its implementation for surface deformation of earth-rockfill cofferdam in upstream and downstream of Xiluodu Hydropower Station.Through analysis on deformation monitoring data of cofferdam,we discover that the deformation of cofferdam is larger in the middle and smaller in both ends;the deformation is larger in the earlier stage and tends to be stable in the later period.Therefore,the deformation laws of cofferdam of Xiluodu Hydropower Station are revealed,which ensures the safety of cofferdam in flood season,excavation and concrete placement in the dam foundation pit.