| Title |
Analysis of Ground Vibration Characteristics by Test Blasting in Southern Region of Jeju |
| Authors |
김승현(Kim, Seung Hyun) ; 이동욱(Lee, Dong Wook) |
| DOI |
https://doi.org/10.12652/Ksce.2019.39.3.0419 |
| Keywords |
시험발파;지반진동;클링커층;감쇠;저주파수 Test blasting;Ground vibration;Clinkers;Attenuation;Low frequency |
| Abstract |
The characteristics of ground vibration have been analyzed by test blasting in southern region of Jeju (layered ground consisting of basalt and clinker). By grasping the principal component of ground vibration and depriving the prediction equations of ground vibration, the propagation characteristics of ground vibration have been compared to the domestic design guidelines. Ground vibration in layered ground has a small amplitude at a short distance. However, it has been confirmed that the vibration energy is transmitted further by virtue of the low attenuation of the ground vibration as it goes to a longer distance. Moreover, the frequency has been confirmed to be low frequency band. The outcome has been defined that it resulted because the clinker layer with a large pore transforms the blasting energy seismic wave with high frequency into a low frequency wave having a long waveform period. In addition, the limits of design guidelines were identified by comparing the ground vibration of Jeju and other bedrock areas. Thus, the necessity of the development of the prediction equations of ground vibration utilized in design that reflect the characteristics of the area has been suggested. |