湖北富水水库大坝渗流监测资料分析

Analysis of dam seepage monitoring data of Fushui Reservoir in Hubei

采用比较法、作图法及数学模型法等渗流监测资料整编分析方法,对富水水库大坝坝体、坝基、绕坝渗流观测资料,发电管周围渗流观测资料,减压井水位观测资料以及坝后渗流量等项目进行分析。分析认为:坝体各测点渗流水位较为稳定,与库水位相关性较差;各断面心墙防渗效果显著;坝基各断面测点水位与库水位相关性整体比坝体测点明显;坝基混凝土防渗墙防渗效果比两岸帷幕灌浆效果明显;左坝肩存在明显绕渗;发电管周围渗流水位受库水位影响相对较小;减压井水位均较低,与库水位有一定相关性;渗流量小,受降雨影响显著。

In this paper,seepage monitoring data of dam,foundation,around dam,around power station conduit,relief wells,dam seepage flow and so on for Fushui reservoir are analyzed respectively by using comparison method,mapping method(drawing process line,correlation diagram and distribution diagram)and mathematical model method(regression analysis).According to the analysis result,the seepage water levels of most dam measuring points are stable and have a poor correlation with reservoir water level.The anti-seepage effect of the core wall of each section is remarkable.Seepage water levels of foundation measuring points obviously have stronger correlation with reservoir water level than dam measuring points.The anti-seepage effect of foundation concrete cut-off wall is more obvious than that of the curtain grouting on both sides.Seepage in left dam abutment is obvious.Influence of reservoir water level on the seepage water level around the power station conduit is relatively small.Water levels of relief wells are all low and have some correlation with reservoir water level.Dam seepage flow is small and significantly influenced by rainfall.