克孜尔水库跨断层形变年变特征分析

ANALYSIS ON THE ANNUAL VARIATION CHARACTERISTICS OF FAULT-CROSSING DEFORMATION MEASUREMENT OF KEZIER RESERVOIR

通过对克孜尔水库跨断层形变特征进行分析,结果显示:①垂直形变每年3～4月、10～11月分别为峰、谷值时间;水平形变每年6～7月、1月分别为峰、谷值时间。②垂直变形的峰—谷时间间隔在1997年之前多为5～8个月,1998年后多为1～3个月;谷—峰值时间间隔在1997年前多为4～7个月,1998年后多在8～11个月。水平形变在1994年之前峰—谷值时间间隔多为6～7个月,1995年后为7～9个月;谷—峰值时间间隔1994年前多为5～6个月,1995年后多为3～5个月。③垂直形变的谷—峰值差在1984年前比较平稳,之后变化较大;1990年之前峰—谷值波动较大,1993年之后明显减小。水平形变的峰—谷值、谷—峰值差在1997年之前变化较大,之后变化明显减小。④水库施工及蓄水初期对跨断层形变有显著影响,尤其对垂直形变的影响特别明显。

The characteristics of fault-crossing deformation in Kezier reservoir is analyzed,and the results show as following： ① The peak values of vertical and horizontal deformation are respectively in May to April and June to July;and the valley values are in October to November,and in January.② The interval of the peak and valley values of vertical deformation is five to eight months before 1997,and one to three months after 1998.The interval of the valley and peak values of horizontal deformation is six to seven months before 1994,and seven to nine months after 1995;The interval of the valley and peak values is five to six months before 1994,and three to five months after 1995.③The values of vertical deformation were changed steady before 1984,and then changed greatly;and the peak and valley values were changed greatly before 1990 till 1993.The values of horizontal deformation were changed greatly before 1997,and then calmed down.④ The fault-crossing deformation measurement is influenced obviously in construction or storing water in the reservoir,especially for vertical deformation measurement.