Journal of Northeastern University:Natural Science ›› 2017, Vol. 38 ›› Issue (5): 735-739.DOI: 10.12068/j.issn.1005-3026.2017.05.026

• Resources & Civil Engineering • Previous Articles     Next Articles

Stability Studies of Reservoir Landslide Under Reservoir Water Level Fluctuation

SONG Dan-qing1,2, SONG Hong-quan3   

  1. 1. College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China; 2. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200030, China; 3. Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, Ministry of Education, Henan University, Kaifeng 475004, China.
  • Received:2016-05-09 Revised:2016-05-09 Online:2017-05-15 Published:2017-05-11
  • Contact: SONG Hong-quan
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Abstract:

For studying the influence of reservoir water fluctuation on reservoir landslide stability, taking a landslide in Jiudianxia reservoir area as an example, the external deformation of landslide is monitored by GPS, and the change law of landslide stability is analyzed in combination with detailed field investigation and reservoir operation data, which is also numerically analyzed by Geo-slope as well. The results show that the landslide has three fast movements in phase of 100~130m, and continuous rapid water rise and fall will trigger landslide movement. The landslide stability decreases with the increase of water fall speed, and the landslide will occur if water fall speed is more than 0.3m/d. The landslide also will occur when water rise speed is more than 0.5m/d. The landslide movement presents a typical time-dependent characteristics, and a lag time can be identified between rapid water fluctuation and landslide movement.

Key words: reservoir water fluctuation, reservoir landslide stability, GPS monitoring, Geo-slope

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