Ahmad Sedighian - civil Engineering Department, faculty of Engineering, Khavaran Institude of Higher Education, mashhad, iran
Abbas Ali Ghezel sooflo - Assistant Professor’s, civil Engineering Department, faculty of Engineering, Azad Islamic university, mashhad, iran

The clay core rock fill dams have such a special place in the world. In this kind of dams, the implementation of their core and adjacent filters are placed in the critical path of dam construction. While the coarse grain shells are performable easy and quickly. Considering this fact, the possibility of replacing the clay core with other appropriate sealing material, has been studied. following the sealing plastic concrete dams has been widely used in the world if the use it as sealing element is less considered. Leakage has been the main reason failure in body and foundation and solution is cut-off wall. In this research plastic concrete seal’s wall with 100 centimeter widths will be compered by clay core earth dam. Modeling Raz & Jargalan dam was conducted by ABAQUS software in north Khorasan. The result show the maximum stress value reduce in sealing cut-off wall and the stress values of authorized dam are lower and The use of proposed sealing cut-off wall reduce the amount of leakage by 66.6 percent which is significant.

Clay core, ABAQUS, Plastic concrete, The maximum stress, Seepage