Title：The Engineering Geological Database for Strong Motion Stations in Taiwan

Abstract：

Central Weather Bureau (CWB) of the R. O. C. has installed more than 650 seismograph stations all over Taiwan. Since the intense and the frequency content of ground motion is effected not only by the source of the earthquake but also by the soil condition of the recording site, realizing soil conditions of the seismograph station site becomes an essential task for earthquake engineering. This project was established to build the Engineering Geological Database for Strong Motion Stations by CWB and NCREE.

In this project, subsurface geological condition of the station was acquired by means of on-site investigations and boring (sampling and testing). Thus the index properties such as the SPT-N value, water content, unit weight, soil classification and grain size distribution were readily acquired. At the same time, Suspension P-S Logging Method was used to measure the wave velocity of the stratum.

This project started in 2000, 60 real time stations were investigated. Total 65 stations located in Ilan, Yunlin, Chiayi and Tainan counties were explored in 2001. Another 51 stations were arranged in 2002, some micro tremor tests were included. All the results will be organized into a GIS web, and the application will be more convinent.