Full text loading...
-
Refraction and Amplitude Tomography Based Methodologies on Evaluation of Engineering Properties of Rocks - A Case Study
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 8th Congress of the Balkan Geophysical Society, Oct 2015, Volume 2015, p.1 - 5
- Previous article
- Table of Contents
- Next article
Abstract
The main aim of this study was the reveal of internal structures and engineering properties of basalt bedrock aged Eocene-Neocene, north of Eastern Pontides, Turkey. In selected area for this purpose, the seismic data were collected at total 7 profiles. A shallow refraction and amplitude attenuation tomography survey in study area was performed to mapping of Vp velocities and attenuation coefficient for civil engineering plans. In order to determine shear wave velocity (Vs) of study area, multichannel analysis of surface wave (MASW) in was also used. The Evaluation results show that the study area has three layers. The upper layer was interpreted as topsoil having a P velocity range from 400 to 800 m/s. The middle layer was interpreted as weathering basalt having a wave velocity range from 1200 to 1600 m/s. The bedrock was interpreted as massive basalt. P-wave seismic velocities of this bedrock range from 1800 to 2800 m/s. The average Vs 30 velocity was found 730 m/s from MASW. Attenuation coefficient is an important parameter to identification rock mass structure and 1/α value of weathering and massive basalt was changed between 5 and 15. During site selection, it has to determine to engineering properties of foundation rock.