Abstract: High performance turf reinforcement mat (HPTRM) is
one of the most advanced flexible armoring technologies for severe
erosion challenges. The effect of turbulence on the slope stability of
an earthen levee strengthened by high performance turf reinforcement
mat (HPTRM) is investigated in this study for combined storm surge
and wave overtopping conditions. The results show that turbulence
has strong influence on the slope stability during the combined storm
surge and wave overtopping conditions. Among the surge height,
peak wave force and turbulent force. The turbulent force has the
ability to stabilize the earthen levee at the large wave force the
turbulent force has strongest effect on the FS. The surge storm acts as
an independent force on the slope stability of the earthen levee. It just
adds to the effects of the turbulent force and wave force on the slope
stability of HPTRM strengthened levee.
Abstract: To estimate the risks of dam failure phenomenon, it is necessary to understand this phenomenon and the involved governing factors. Overtopping and piping are the two main reasons of earthdam failures. In the piping context, the piping is determined as a phenomenon which is occurred between two phases, the water liquid and the solid soil. In this investigation, the onset of piping and its development, as well as the movement of water in soil, are numerically approached. In this regard, a one-dimensional numerical model based on the mass-conserving finite-volume method is developed and applied in order to simulate the piping phenomenon in a continuous circular tunnel of given initial length and radius, located between upstream and downstream. The simulation result includes the time-variations of radius along the tunnel until the radius value reaches its critical and the piping phenomenon converts to overtopping.