Evaluation analysis and comprehensive geophysical detection of antiseepage reinforcement effect for a reservoir dam
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Abstract:
In the detection of dam anti seepage treatment effect,the geophysical method can achieve rapid and non-destructive detection.However,it is difficult to make an accurate judgment on the quality of anti-seepage treatment because of the multi-solution of single geophysical method.In order to analyze the anti-seepage effect of concrete seepage presentation wall and curtain grouting of a reservoir dam, different geophysical methods such as ground penetrating radar and high density electrical method of detection were carried.The detection test showed that the continuity of the dam cut off wall was generally good,and there were no obvious discontinuities,holes and other abnormal defects.There were intermittent areas of low resistance on the downstream side of the dam,some of which had high water content.There were contact and leakage between the water pipeline and the dam body.The dam body downstream of the K0+200 to K0+300 section had poor filling quality,loose body,and high water content.The karst was developed with high water content between the foot of right dam and the mountain.The geophysical exploration technology can be applied to the detection of seepage prevention effect of concrete impermeable wall and dam foundation curtain grouting.
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