›› 2009, Vol. 30 ›› Issue (4): 1029-1034.

• Geotechnical Engineering • Previous Articles     Next Articles

Research on seepage muddle water phenomena at earth-rock dam for Longfengshan Reservoir

ZHENG Zhen-bao1，TU Yu-min2，LIU Guo-hua2，LI Fu-qiang2，WANG Zhen-yu2   

  1. 1. Zhejiang Tongji Vocational College of Science and Technology, Zhejiang Hangzhou 3112312, China； 2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China
  • Received:2007-10-12 Online:2009-04-10 Published:2011-01-30

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Abstract:

Longfengshan Eeath-Rock Dam has running for a long time; the muddy water phenomenon has occurred seriously in the gutter. The muddy water phenomenon changed cyclically during the day. The atomic absorption spectrometry and the X-fluorescence spectrometry has been developed to analyze the chemical composition of water and precipitates in the drainage. The chemical constituents’ evolution law of the dam foundation precipitates is researched. Research results show that the water is results rich in Ca and the precipitates are rich in Fe and Mn. In the period of groundwater seepage in the dam foundation, groundwater has physico chemical reaction with the rock foundation, leading to chemical corrosion. The chemical corrosion of groundwater seepage is closely related to the nature of the foundation rock. Basic rock category, because of the rich in iron, manganese, and other dark elements, was prone to migrate in the acidic environment.Fe2O3 and MnO2 flocculation-like sediment would appear in the gutter,resulting in the muddle waters phenomenon in the gutter.

Key words: seepage, precipitates, chemical corrosion, earth-rock dam

CLC Number: 

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