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针对地下水控制工程的修建影响大坝渗流的研究,结合工程实际,并基于非饱和非稳定渗流原理,对修建有集水廊道的土石坝进行了渗流分析,研究结果表明:水位上升,渗漏量增大;水位下降,渗漏量减小,但坝基渗漏是主要的渗透通道。集水廊道的修建使大坝的渗漏量、坡降增大,但它能够有效地降低坝内和下游河床浸润线,减少下游浸没区范围,有利于大坝整体抗滑稳定和后期安全运行。
Aiming at the research on the influence of the construction of groundwater control project on seepage of dam, the seepage analysis of earth-rock dam constructed with water-collecting corridor is carried out based on the theory of unsaturated and unsteady seepage. The results show that the water level rises, The amount increases; the water level drops, the leakage decreases, but the leakage of the dam foundation is the main infiltration channel. The construction of catchment corridor makes the seepage and slope drop of the dam increase, but it can effectively reduce the infiltration line in the dam and the downstream riverbed and reduce the range of the downstream immersion zone, which is in favor of the dam’s overall anti-sliding stability and late safety run.