ويژگيهاي آبرفتهاي جنوب تهران از ديدگاه زيوتكنيك لرزه اي

Seismic geotechnical Properties of South Tehran alluviums

Despite of different studies performed on Tehran geological condition, the geotechnical and dynamic properties of Tehran alluviums are not investigated in detail. In this study the authors have tried to get more detail information about south Tehran alluviums by compiling the data from 700 boreholes and 66 seismic profile investigations. The defined 15 two dimentional E-W seismic geotechnical profiles by the distance of lkm present the geotechnical and dynamic properties of the south Tehran alluviums. Based on these sections the depth of the seismic bedrock increases from north to the south. In addition it is demosntrated that S wave velocity variation in the study area follows the difference of soil type observed in the presented sections. It seems that the local changing of the water table and the seismic bedrock depth could be related to North-Ray fault and Punakhzad fault effects.