【摘要】 利用国内外类似构造位置上的走滑型、逆走滑型发震断层极震区IX度等震线短轴在断层上、下盘分布宽度的统计分析,探讨了大柳树高坝的F201断层避让距离问题。经统计分析,给出了活断层IX度等震线短轴在断层上盘的优势宽度为6~6·4km,在这个距离之内,活断层的粘滑或蠕滑运动都可能会在地表产生永久性形变,同震或震后灾害严重,对于工程而言存在抗断问题。因此,这个数据可作为F201发震断层避让距离的参考值。野外调查表明大柳树高坝距F201活断层仅1·5km,小于本研究得出的活断层避让距离,而且坝址位于F201活断层上盘,因此不适宜在大柳树坝址修建水利水电工程。更多还原

【Abstract】 The Daliushu A-class water and electricity project is planning to be built at Daliushu, Heishanxia of the Yellow River. In order to find the distance of the dam evading the active fault F_ 201 , we used the width data of the short axes of intensity Ⅸ isoseismal on the strike-slip and reverse strike-slip active faults, the structure situations of which are similar to the F_ 201 , to make a statistic analysis. It is concluded that the evaded distance of the active fault is about 6-6.4 km. Based on the geological-seismic field investigation, the distance from the Daliushu Dam to the F_ 201 is only 1.5 km, and it is on the hanging wall of the fault F_ 201 , so it is a dangerous site for the Daliushu high dam.更多还原