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Çѱ¹Áö¹Ý°øÇÐȸ / v.23, no.1, 2007³â, pp.51-65
¾Ï¹Ý ºÒ¿¬¼Ó¸é Å½ÃøÀ» À§ÇÑ ÃÊÀ½ÆÄ ¹Ý»ç À̹ÌÁö - ½Ç³»½ÇÇè
( Ultrasonic Reflection Imaging for Discontinuity Detection of Rock Mass - Laboratory Study )
ÀÌÁ¾¼·;±è½Â¼±;±èµ¿Çö;±è¿í¿µ;ÀÌÀθð; °í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;°í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;GS °Ç¼³ ÁöÇϰø°£ÆÀ;GS °Ç¼³ ÁöÇϰø°£ÆÀ;°í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;
 
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º» ³í¹®ÀÇ ¸ñÀûÀº ÃÊÀ½ÆÄ Ž»ç ¹æ¹ýÀ» ÀÌ¿ëÇÏ¿© Áö¹Ý³»ÀÇ ºÒ¿¬¼Ó ¹°ÁúÀ» Å½ÃøÇÒ ¼ö ÀÖ´Â °íÇØ»óµµÀÇ ½Ã½ºÅÛÀ» °³¹ßÇÏ°í ½Ç³»¿¡¼­ Àû¿ëÇÏ´Â °ÍÀÌ´Ù. ÃÊÀ½ÆÄ Å½Ãø ¹æ¹ýÀº ºÒ¿¬¼Ó¸éÀÇ °æ°è¸é¿¡¼­ ¹Ý»çµÇ¾î¿Â ¹Ý»çÆÄ¸¦ Å½ÃøÇϰí, À̸¦ ¹è¿­ÇÏ¿© ºÒ¿¬¼Ó¸éÀÇ Á¸À縦 ã´Â ¹æ¹ýÀÌ´Ù. º» ³í¹®Àº ¾Ï¹Ý³» ÃÊÀ½ÆÄÀÇ Àü´Þ ¾ç»ó, ÃÖÀûÈ­µÈ Æ®·£½ºµà¼­ÀÇ ¼±ÅÃ, µ¥ÀÌÅÍ È¹µæ, ½Åȣó¸® ¹æ¹ý, ¿µ»óÈ­ ±â¹ý, ±×¸®°í ½Ç³» Àû¿ë½ÇÇèÀ» Æ÷ÇÔÇϰí ÀÖ´Ù. ½Ç³»½ÇÇèÀº ¼öÆòÀ̵¿ÀåÄ¡¿Í ȸÀüÀ̵¿ÀåÄ¡¸¦ ÀÌ¿ëÇÏ¿© ¼öÇàµÈ´Ù. ¼öÁß¿¡¼­ ¼öÆòÀ̵¿ ¹× ȸÀü½ÇÇè °á°ú, ºÒ¿¬¼Ó¸éÀÇ À§Ä¡¿Í Å©±â°¡ Á¤È®ÇÏ°Ô Æò°¡ µÇ¾ú´Ù. ¶ÇÇÑ ¼®°í½Ã·á¿¡¼­ ȸÀü½ÇÇè°á°ú ¼®°í ³»¿¡ Á¸ÀçÇÏ´Â ±Õ¿­°ú °øµ¿ÀÌ ºñ±³Àû Á¤È®ÇÏ°Ô ¿µ»óÈ­µÊÀ» ¾Ë ¼ö ÀÖ´Ù. º» ³í¹®Àº »õ·Ó°Ô Á¦½ÃµÈ ¹æ¹ýÀÌ ¾Ï¹Ý ºÒ¿¬¼Ó¸é Å½Ãø¿¡ ¸Å¿ì °æÁ¦ÀûÀ̰í È¿°úÀûÀÎ ¹æ¹ýÀÌ µÉ ¼ö ÀÖÀ½À» º¸¿©ÁØ´Ù.
The purpose of this study is the development and application of a high resolution ultrasonic wave imaging system to detect discontinuity plane in lab-scale rock models. This technique is based on received time series which capture the multiple reflections at interface. This study includes the fundamental aspects of ultrasonic wave propagation in rock mass, the selection of the optimal ultrasonic wave transducer, data gathering, a signal processing, imaging methods, and experiments. Experiments are carried out by the horizontal movement and rotation devices. Experimental studies show the discontinuity is well detected by the horizontal movement and rotation devices under water. Furthermore, the discontinuity and the cavity on the plaster block are identified by the rotation device. This study suggests that the new method may be an economical and effective tool for the detection of the discontinuity on rock mass.
 
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Cavity;Coupling;Directivity;Discontinuity;Impedance;Reflection;Signal processing;Transducer;Ultrasonic waves;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.23, no.1, 2007³â, pp.51-65
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200708508460763)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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ȸ»ç¼Ò°³ ±¤°í¾È³» ÀÌ¿ë¾à°ü °³ÀÎÁ¤º¸Ãë±Þ¹æÄ§ Ã¥ÀÓÀÇ ÇѰè¿Í ¹ýÀû°íÁö À̸ÞÀÏÁÖ¼Ò ¹«´Ü¼öÁý °ÅºÎ °í°´¼¾ÅÍ
   

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