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摘要: 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。Abstract: The impounding of the Three Gorges Reservoir has lasted for 10 years since its beginning in 2003. In this paper, the tilt data of the Xiannvshan fault zone from 2002 to 2009 is analyzed by comparing with the water level data of the Three Gorges Reservoir, and the result reveals that the trend of curve in the tilt data changes around the impounding, which shows that the impounding of three gorges reservoir has an affection on the nearby fault activity. the response of short-term changing load during impounding is more significant but can't change the nature of activity fundamentally. It is found that water rise level has the same ratio with the observation data's rise level during three large impoundment, which further shows that the tilt meter is able to record the load change caused by the impounding of three gorges reservoir.
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Keywords:
- Three Gorges Reservoir /
- Xiannv mountain fault zone /
- impounding effect /
- tilt
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