THE EFFECTS OF SUBSURFACE HOLES ON DYNAMIC RESPONSES OF EARTH DAM (CASE STUDY: TANG-E SORKH EARTH DAM)

Ground motions resultant to an earthquake response are the seismic source, the wave travelling path, the site conditions and the rupture process. The characteristics of soil layers in the vicinity of an active fault significantly effect on site response. It is different in soil specification, dip and strike of slopes, fault characteristics and near-field or far-field earthquake condition. The earth dam founded on the soft soil deposit respond has different behavior if supported on a stiff rock (Bertero et al., 1978; Davoodi, 1388; Seed et al., 1977). One of the parameters that effect on site response is subsurface discontinuity such as crack, holes, Karst and sinkholes (Shahnazari H., 2009). Therefore, it is necessary to assess the effect of these complications. This research has carried out to aim the effect of the holes on the dynamic behavior of earth dams, and their impact on increasing the deformation and instabilities. In order to determine the cavities condition on the embankment response, the situation of Tang-e Sorkh Earth Dam has been considered.

Keywords:

Site effect , Sinkhole , Tang-e Sorkh , Dam , Karst