ABSTRACT: Base rock of the Burgaz dam in the eastern part of the city of İzmir consists of micaschists

having different physical and mechanical properties due to weathering and fracturing. The first

aim is to compute the amount of settlement and ultimate bearing capacity value of micaschist

both in and beneath the cutoff zone by using the results of pressuremeter tests. In addition, data

from in-situ and some laboratory tests, which were used in the establishment of the relations

between elastic modulus of the micaschist rock mass (EM) and uniaxial compressive strength (σc),

EM/Eintact ratios and RQD values. Comparison of in-situ and estimated rock mass deformation moduli by

considering the RQD values was also performed. Pressuremeter tests indicate that for a dam with 115 m

height and a base width of 58 m, the settlement will vary between 2.13 and 2.26 mm. The second aim of

this work is to measure compression and shear wave velocities in order to obtain both the ratio of dynamic

elastic modulus to Poisson′s ratio (E/v)dynamic and to compare (E/v)dynamic to (E/v)static. Test results reveal a

positive linear relation of (E/v)dynamic =(E/v)static0.968. The sonic wave velocity of the micaschist is highly

related to the testing direction. This study not only discusses the relationships between Estatic and sonic

wave velocity (Vp) and Edynamic, but also the anisotropy effect arisen due to the schistosity planes with

different orientations.