关键词: 水利水电工程, 岩土工程, 混凝土面板堆石坝, 渗控工程, 帷幕灌浆, 渗漏

Abstract: After studying such features as underdeveloped kast in junction region and fault in river direction, on the left bank of seepage control engineering development of monoclinic and reverse mainly of phyllite stratum, new micro—fresh phyllite permeable, by reviewing the geological conditions of the early stage and under the excavation in conjunction with assessment of rock peameability in junction region，it was judged that the possibility of deep percolation and concentrated leakage path was small, But the water pressure data show that the bottom of the curtain was still developing highly permeable rock, in view of the engineering geological complexity, the possibility of slight leakage along the local highly permeable rock mass still exists. Through a comprehensive analysis by various means and methods it is considered that dam leakage is most likely at the superficial local defects of shallow surface and water leakage from inside to outside of the tunnel on left bank.

Key words: water conservancy and hydropower engineering, geotechrical engineering, concrete face rock-fill dam, seepage control engineering, curtain grouting, leakage