陆浑水库坝基水位观测资料分析

经过对 30余年水位观测资料的整理和分析 ,在厘定水文地质模型的基础上 ,运用数理统计原理 ,获得了坝基地下水渗流特征及其变化趋势的基本认识 ,这包括库、管水位关系 ,代表断面测压管平均位势过程线 ,特定库水位时测压管管水位过程线 ,坝基渗流量变化。研究表明 ,上游铺盖与截水槽结合下游排水的防渗体系有效地控制了坝基水位 ,这为水库投入正常高水位(319.5 ,32 7.5 ,331.8m)的运行提供了详实的理论依据。

SYSTEM ANALYSIS OF THE WATER-LEVEL DATA OF THE LUHUN DAM FOUNDATION

Luhun Reservoir lies in the middle reaches of Yi River,Song County,Henan Province The dam across the river,55 meters high,is of a clay pebble slanting-wall dam In order to insure its safety,impervious system has been set up,including natural blanket,man-made blanket,clay cutoff wall and the sloping core Since the dam was established in August 1965,long observations on the seepage have been carried out carefully,so lots of observation data have piled up now But so far,any systemic arrangement hasn't been carried through and any reasonable orderliness hasn't been summed up Based on the hydro-geological model and the statistics theory,the authors have analysed those observation data from the dam Further more,the authors succeed in summing up valuable rules of the dam foundation seepage stability,and get the knowledge about its tendency.That is,the relationship between the reservoir water level and the piezometer,the hydro-graph of hydro-potential on average piezometric head,the hydro-graph of piezometric head at certain reservoir's water level and the rules of dam foundation seepage The results prove that the impervious system of the upper blanket and the cutoff wall has controlled the seepage efficiently,and it gives the theoretical support of the reservoir's normal work