Characteristics and mechanism of concentrated unloading in bank slope of Yangqu hydropower station |
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| Authors: | Min Xia Guang Ming Ren |
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| Institution: | 1. State Key Lab. of Geo-hazard Prevention and Geo-environment Protection, Chengdu University of Technology, No. 1 Erxianqiao East Road, Chengdu, 610059, China
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| Abstract: | Based on the study of field background, tectonic evolution and development history of the Yellow River valley, the authors made an in-depth study of the distribution and formation mechanism of the deep concentrated unloading of a typical bank slope developed in broad basin, and found that the concentrated unloading ranges from 2520 to 2650 m at El, the horizontal depth is 40 to 90 m in left bank and 40 to 60 m in right bank. It showed that these deep cracks in concentrated unloading zone generally dip towards the river or to the inner slope with high angle, and the cause of formation due to the category of unloading. The concentrated unloading is the product of the epigenetic deformation along the original tectonic structural planes accompanied by the stress release of slope during the formation process of river bank slope. |
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