四川冕宁大桥水库区水文地质与工程地质条件研究

A STUDY ON HYDROGEOLOGY AND ENGINEERING GEOLOGY SETTINGS OF THE AREA OF DAQIAO RESERVOIR,MIANNING,SICHUAN PROVINCE

摘要:

分析了四川冕宁大桥水库坝区和库区的水文地质和工程地质条件.由于库区内断裂比较发育,因此,水库蓄水后,库水将会下渗,易于发生诱发地震.由于大坝和库区位于安宁河断裂中段,因此应注意该段发生诱发地震的可能性.库坝区边坡较稳定,但是近库坝区局部边坡有失稳的可能性,虽然不致于影响水库的正常运行,但是也应引起重视.

Abstract:

The hydrogeology and engineering geology settings of the area of Daqiao reservoir and its dam,Mianning,Sichuan province are analyzed.It is believed that after the store water,water of the reservoir may penetrate down due to a lot of faults in the areas,therefore,there is a very fair possibility of induced earthquake.The possible area for induced events is at the middle portion of the Anninghe fault.The hill-slopes around the reservoir are relatively stable,but the possible instable situation of a few localities of hill-slopes near the reservoir exits,which have to be attached importance to although do not affect the function of the reservoir.