【摘要】 新疆克孜尔水库大坝位于活断层通过地段 ,蓄水后观测到一系列明显形变异常 .用最小二乘法拟合了库区地壳形变多年的变化趋势 ,计算了多年平均形变速率 .库区多项地形变观测数据对比 ,结果表明 :正常情况下 ,库区跨断层垂直和水平形变具有极清楚的年变规律 ,但大坝施工开始后观测到了明显的形变异常 ,其异常变化经历了施工干扰期、反向变化期 ,恢复过渡期等阶段 ,目前处于继承运动期 .引起这种异常变化的主要原因与施工过程中大量的土石方开挖、填筑以及蓄水后产生的地面荷载变化有关 ,也受水文地质条件、应力状态、孔隙压力等条件变化及地震前兆的一定影响更多还原

【Abstract】 The Kezier Reservoir is located at the region of active geological fault.After impounding,the observation data show taht abnormal deformation of the fault is happened.The least square method is applied to study the deformation tendency and calculate the mean annual rate of deformation.It is found that the deformation variation is closely correlated to the excavation of rock mass,filling of the dam during construction as well as the water loading due to impounding.Other factors including the hydro\|geological condition,ground stress status and pore stress has also affected the deformation.更多还原