瀑布沟水电站库首右岸拉裂变形体变形特征与分析

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Abstract With the rapid development of Chinese hydropower construction，more and more large-scale projects encounter the stability problems of dynamo-relaxed rock mass. The deformation characteristics and failure mechanism of dynamo-relaxed rock mass are very complex. Based on the monitoring data and geology data of the tension-displaced rock mass on right bank at head area of Pubugou hydropower station，analysis method of the displacement characteristics and failure mechanism using monitoring data has been summarized. In addition，the comparative analyses of deformation characteristics are made to verify the method among the tension-displaced rock mass of Pubugou，the Geheyan Maoping landslide on Qingjiang River and the upstream slope of Pubugou rockfill dam. The results show that：(1) The tension-displaced rock mass moves in the way of blocks dislocation；and the slope terrain controls the direction of dislocation. (2) The failure mode of the tension-displaced rock mass is in the partially gradual way；and suddenly global failure can hardly happen. Nowadays，there are major differences in dislocation direction，dislocation time of rock mass at different locations. (3) Using the monitoring data from vertical inclinometer hole，dislocation zones are divided into two categories (I and II)，and the class I is further divided into two sub-categories(I1 and I2). (4) The deep support using anchor cable should emphasize the identification of the type of dislocation zone and should especially control the Class I dislocation zone，and should emphasize the support of random bolting. (5) The tension-displaced rock mass is not sensitive to rainfall and to change in reservoir levels.

Key words： rock mechanics dynamo-relaxed rock mass blocks dislocation dislocation zone landslide monitoring

Received: 24 October 2012

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/I3/549

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