ENGINEERING-GEOLOGICAL PROBLEMS OF CONCRETE FACE-PLATE DAM OF HEIQUAN RESERVOIR AND MEASURES FOR ENGINEERING TREATMENT IN QINGHAI PROVINCE

The concrete face-plate dam of Heiquan Reservoir is 123.50 m high, the 4 th built high concrete face-plate dam in China. The landform at the dam site has been broken, the structures are developed, and the engineering-geological conditions are complex. The existence of Quaternary sand-gravel beds on the riverbed is unfavorable for the stability of the dam body. Thus, some specific structural measures were taken in design of the dam and well satisfied the specific geological conditions. This paper analyzes the engineering-geological conditions and the relevant engineering treatment measures.