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Çѱ¹Áö¹Ý°øÇÐȸ / v.21, no.5, 2005³â, pp.207-214
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( Verifications of the Impact-echo Technique for Integrity Evaluations of the Drilled Shaft Using Full Scale Tests )
Á¤°æÀÚ;Á¶¼º¹Î;±èÈ«Á¾;Á¤Á¾È«; Çѱ¹µµ·Î°ø»ç µµ·Î±³Åë±â¼ú¿ø ¿¬±¸¿ø;Çѱ¹µµ·Î°ø»ç ÀÎõ´ë±³°Ç¼³»ç¾÷¼Ò ¿¬±¸¿ø;Çѱ¹µµ·Î°ø»ç µµ·Î±³Åë±â¼ú¿ø;Çѱ¹µµ·Î°ø»ç µµ·Î±³Åë±â¼ú¿ø;
 
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The reflected signals from the defects of a pile and the boundaries between the pile and soils are analyzed to evaluate the integrity of drilled shafts in the impact-echo test. Signals varied according to both of the stiffness ratio of the pile to defects and that of the pile to surrounding soils. Model tests using the small size pile in the laboratory and numerical analyses have limitations in finding the characteristics of the signals due to different stress wave characteristics and unreliable modelling for the interaction between the pile and soils respectively. Full scale testing piles which have artificial defects are installed by the actual construction method and they were used to investigate the characteristics of reflected signals according to defects and the stiffness ratios of the pile to soils around.
 
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Defects;Drilled Shaft;Impact-echo Test;Integrity;Stiffness Ratio;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.21, no.5, 2005³â, pp.207-214
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200504704325957)
¾ð¾î : Çѱ¹¾î
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