Synthesis Geophysical Method in Earthquake Safety Evaluation

In the seismic safety evaluation of Tang-cao railway project, we use synthesis geophysical methods including shallow seismic exploration, refraction, drilling to find out the distribution and activity time of the Ninghe-changli fault conbining with drilling data. The results show that the Ninghe-changli fault is an early-middle Pleistocene fault which extends in dirction of NEE and cosists of 3 segment:south segment, middle segment and north segment, the south segment and north segment are mainly normal type while the the middle is strike-slip type. The study supplements and enrichs the geophysical prospecting data of the region and provides basic data for the seismic safety evaluation, land planning, et al.