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Çѱ¹Áö¹Ý°øÇÐȸ / v.21, no.4, 2005³â, pp.5-12
ÇöÀ埼³ÄÜÅ©¸®Æ®¸»¶ÒÀÇ °ÇÀüµµ Æò°¡¸¦ À§ÇÑ geotomographyÀÇ Àû¿ë ¿¬±¸
( Geotomography Applied for the Integrity Test of Cast-in-place Piles )
ÀÌÀç°æ;¹ÚÁ¾³²; µ¿¾Æ´ëÇаú Áö±¸È¯°æ°øÇкÎ;µ¿¾Æ´ëÇб³ Áö±¸È¯°æ°øÇкÎ;
 
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ÃÖ±Ù ¹°¸®Å½»ç ºÐ¾ß¿¡¼­´Â Åä¸ñ ¹× ȯ°æ ºÐ¾ß¿¡ Àû¿ëÀ» ¸ñÀûÀ¸·Î ÇÏ´Â Á¤¹Ð ¹°¸®Å½»ç°¡ »õ·Î¿î °³Ã´ºÐ¾ß·Î ±ÞºÎ»óÇϰí ÀÖ´Ù. ÀÌ´Â ÃøÁ¤ÀåºñÀÇ Á¤¹ÐÈ­, ÄÄÇ»ÅÍÀÇ ´ë¿ë·®È­ µî°ú °°Àº ±â¼úÀû ¿ëÀΰú ±¹³»¿ÜÀûÀ¸·Î Áõ´ëµÇ°í Àִ ȯ°æ¿À¿°ÀÇ Á¶»ç ±â¼ú ¹× °¢Á¾ Áö¹Ý»ç°í¿¹¹æ ±â¼úÀÇ °³¹ß¿¡ ´ëÇѿ䱸¿Í °°Àº »çȸÀû ¿äÀο¡ ±âÀÎÇÑ´Ù. ÀÌ·¯ÇÑ »çȸÀû ¿ä±¸¿¡ ¸ÂÃß¾î ÇöÀ埼³ ¸»¶ÒÀÇ °ÇÀüµµ ½ÃÇè¹ý¿¡ ´ëÇÑ °ü½ÉÀÌ Áõ´ëµÇ°í ÀÖÀ¸¸ç, Á¤¹ÐÇÑ ½ÃÇè¹ýÀÌ ¿ä±¸µÇ°í ÀÖ´Ù. ƯÈ÷ ºñÆÄ±«°Ë»çÀÇ ¹æ¹ý Áß ÃÊÀ½ÆÄ¸¦ ÀÌ¿ëÇÑ ½ÃÇè¹ýÀº ¸Å¿ì ½Ç¿ëÀûÀÌ´Ù. ÃÊÀ½ÆÄ¸¦ ÀÌ¿ëÇÑ ÆÄÀϰÇÀüµµ ½ÃÇè¹ý¿¡ Geotomography ±â¹ýÀ» Àû¿ëÇÏ¿© ÇöÀ埼³ ¸»¶Ò ³»ºÎ¸¦ ¿µ»óÈ­ÇÔÀ¸·Î½á º¸´Ù Á¤¹ÐÇÑ ÀڷḦ ÅëÇÏ¿© ±¸Á¶¹°ÀÇ ¾ÈÀü¼º ÆÇ´Ü¿¡ Á¤È®µµ¸¦ ±âÇϰíÀÚ ÇÏ¿´´Ù. º» ¿¬±¸¿¡¼­´Â ÀÌ»ó¸ðµ¨À» ¼³Á¤ÇÏ¿© Åä¸ð±×·¡ÇÇ ÇÁ·Î±×·¥ÀÇ Á¤È®¼ºÀ» Á¡°ËÇÏ¿´°í, ¼öÁ¶½ÇÇèÀ» ÅëÇÏ¿© ÀÎÀ§ÀûÀ¸·Î ÀÌ»óü ÇüÅÂ¿Í À§Ä¡¸¦ º¯È­±â½ÃÄ×À¸¸ç, ÃÖÁ¾ÀûÀ¸·Î ½ÇÁ¦ ÄÜÅ©¸®Æ® ÆÄÀÏ ¸ðÇüÀ» Á¦ÀÛÇÏ¿© ÆÄÀÏ ³»ºÎÀÇ ÀÌ»óü¸¦ ¿µ»óÈ­ÇÏ¿´´Ù. ½ÇÇèÀÇ °á°ú ¸ðÇü ÆÄÀÏ ³»ºÎÀÇ ¿µ»óÈ­¸¦ ÅëÇØ ÀÌ»óüÀÇ À§Ä¡¸¦ ºñ±³Àû Á¤È®ÇÏ°Ô È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù.
Recently, geophysical prospecting methods have played very important roles in civil and environmental engineering problems. Technical advances in geophysical instruments and computer system made it possible to get underground images with very high resolution far purposes to resolve those problems. It was possible partly due to ever increasing demand for development of technologies needed to precisely detect polluted areas and prevent ground-related accidents. Based on the same demand, integrity tests of cast-in place piles draw more attention and development of accurate test procedures is required. Ultrasonic methods is one of most advanced non-destructive procedures. In the paper, a geotomography method is employed for the cast-in place pile integrity test using ultrasonic waves. The image of pile interior is scanned and scrutinized far better and more accurate decision in the cast-in place pile integrity. In this study, we firstly examined the accuracy fur tomography program with idealized synthetic models built in water tank: their position and size were changed in the tank and each case was studied. In the next stage, real concrete pile models were fabricated and images of anomaly areas inside the pile were scanned to successfully locate those areas.
 
Ű¿öµå
Cast-in-placed pile;Cross-hole sonic logging;Geotomography;Pile integrity test;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.21, no.4, 2005³â, pp.5-12
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200502637460442)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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