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分析了位于仙女山断裂带的湖北省秭归县周坪站倾斜仪2002~2009年的观测数据,并与三峡库区水位资料进行了对比分析,结果发现,蓄水前后倾斜仪观测曲线的走向发生了趋势性变化,表明三峡蓄水对附近的断层活动有影响,蓄水期间的短期荷载变化引起的响应更为显著,但蓄水效应没有从根本上改变断层的活动性质;还发现3次大的蓄水期间,水位上升量与观测曲线的上升量成相同比例的对应关系,进一步说明,周围断层对三峡蓄水引起的荷载变化响应明显,不同的荷载变化引起断层活动变化的程度不同。
The observation data of the tiltmeter at Zhouping Station in Zigui County, Hubei Province, from 2002 to 2009 were analyzed and compared with the water level data of the Three Gorges Reservoir. The results show that the trend of the observed curve before and after the impoundment The trend change indicates that the Three Gorges reservoir has an impact on the fault activity in the vicinity and the short-term load change during the storage period will cause more obvious response. However, the water storage effect does not fundamentally change the fault’s active nature. During the impoundment period, the rise of water level and the rise of observation curve have the same proportion, which further shows that the response of the surrounding fault to the load change caused by the Three Gorges water storage is obvious, and the changes of fault activity caused by different load changes are different.