The Research of Radar detection of the advanced forecast of geological conditions in Qiyueshan Tunnel of Yiwan railway

摘要

Qiyueshan Tunnel is an extra long tunnel with serious water-bursting. Combined with advanced forecast of geological conditions, radar-detection-technique research and study have been made, radar graphical characteristics of ideal karst cavity has been studied, variance of results due to different frequency has been analysed; preferred frequency of the karst-cavity detection has been determined; influencing factors and matters needing attention of advanced forecast in tunnel and the existing problem of the current radar equipments have also been studied in this paper.