›› 2010, Vol. 31 ›› Issue (S1): 430-434.

• Numerical Analysis • Previous Articles     Next Articles

Application of cross-well electromagnetic wave CT technique to evaluating weathered igneous rock dam structure of Zuojiang river power station

LI Hua-qing1, XU Yuan-guang1, GAN Fu-ping1, ZHAO Wei1, LU Jian-ji2   

  1. 1. Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin, Guangxi 541004, China; 2. Nanning, Guangxi Water Resources and Electric Power Design Institute, Nanning 530001, China
  • Received:2010-04-13 Online:2010-08-10 Published:2010-09-09

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Abstract:

The hole between the electromagnetic wave CT method can not only detect and igneous rock formation in the karst rock weathering interface detection, has broad application prospects. Foundation for the power station on the left felstone igneous rock formation, rock containing quartz, feldspar, montmorillonite and other minerals, together with stress easily hidden weathering weak interlayer interface and a direct impact on dam safety. Made between the use of continuous improvement of the hole electromagnetic method and the CT processing software, data obtained from the inversion of the imaging. The results show that the absorption coefficient value of the observed specimen test results shows good agreement. In the detection of three pairs of drilling section, digital images are given a clear structure and the weathered rock layer interface depth, drilling results have been validated for the Zuojiang river dam foundation grouting curtain depth to provide a reliable basis.

Key words: absorption coefficient, electromagnetic wave, hole between the CT method, felstone, dam foundation

CLC Number: 

  • TU 411
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