Behavior analysis of Ghaleeh Chay earth fill dam using instruments data

The Analysis of earth fill dam behavior during construction first impounding and operation periods. May help to recognize any possible destructive phenomena such as high water pore pressure, non- uniform settlements, excessive leakage, piping, and arching etc. In this research, the behavior components of Ghale Chay earth fill dam are investigated using instrumentation data. These components are: water pore pressure, total soil pressure, settlement in foundation and dam body. Various instruments installed in four different section of dam including: piezometers, settlement gages, inclinometers, total pressure cells and stand pipes. The research results indicate that the water pore pressure in the clayey core reduces in flow direction. For different reservoir water level pore pressure is nearly constant downstream of cut-off wall located in dam foundation (changes less than 10%). Maximum settlement occur at cross section No.2 of dam is equal to 816 mm (equal to 1% of dams height) is seen at 43.7% of dam height.