Author/Authors :
Sedghi-Asl، Mohammad نويسنده Assistant Professor, Soil Science Department, Faculty of Agriculture, Yasouj University, Yasouj, Iran Sedghi-Asl, Mohammad , Parvizi، Mansour نويسنده Assistant Professor, Civil Engineering Deparement, Faculty of Engineering, Yasouj University, Yasouj, Iran Parvizi, Mansour , Armin، Mohsen نويسنده Assistant Professor, Watershed Management Department, Faculty ofNatural Resources, Yasouj University, Yasouj, Iran Armin, Mohsen , Berrones، Flores نويسنده Research Engineer, Mexican Institute of Water Technology, Paseo Cuauhnahuac 8532, Jiutepec, Mor. 62550, Mexico Berrones, Flores
Abstract :
In this paper we investigate the mechanism of internal erosion caused in the right abutment of the
Shahghasem dam’s spillway. Shahghasem dam is an earthen dam located in Yasouj, in southwest of
Iran. A significant hole and pipe have been observed in the corner of the right abutment from upstream
view. The foundation is Marlstone, which has low cohesion and susceptible for internal erosion and
piping in some conditions. Going through details of the design maps has shown that Lane’s criteria for
selecting safe dimensions of the seepage control measures have not been considered properly. A series
of the supportive walls are designed to attach to the right part of the spillway in order to increase the
length ofseepage. The pipe route of the erosion should also be grouted with high quality concrete.
