사력댐의 안정성평가를 위한 표면파탐사(MASW)의 활용성

Safety Evaluation of Rock-Fill Dam by Seismic(MASW) Method

  • 정해상 (한국시설안전기술공단 댐항만실) ;
  • 오영철 (한국시설안전기술공단 지하시설실) ;
  • 방돈석 (한국시설안전기술공단 댐항만실) ;
  • 안상로 (한국시설안전기술공단 댐항만실)
  • 발행 : 2003.03.01

초록

For safety evaluation of a rock-fill dim, it is often necessary to investigate spatial distribution of weak zones such as fracture. Both DC-resistivity survey and seismic(SASW) method are usually used for the purpose. Recently, Multichannel analysis of surface waves(MASW) method which makes up for the weak point of SASW method is developed and the site examination which is simple came to be possible comparatively. In order to obtain 2-D shear-wave velocity(Vs) profile along the dam axis that can be associated with dynamic properties of filled materials, MASW method was adapted. Then, DC-resistivity survey and drilling survey were performed to compare with each results. We confirmed that the MASW method and DC-resistivity survey show complementary result that corresspond with drilling result. Therefore, MASW method is an efficient method for dynamic characterization of dam-filling materials and also the combination of related methods such as DC-resistivity can lead to an effective safety evaluation of rock-fill dam.

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