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Çѱ¹Áö¹Ý°øÇÐȸ / v.25, no.11, 2009³â, pp.53-60
PÆÄ ¼Óµµ Åä¸ð±×·¡ÇǸ¦ ÀÌ¿ëÇÑ ÅͳΠÁÖº¯ÀÇ ¾Ï¹Ý¼Õ»ó Æò°¡
( Assessment of Rockmass Damage around a Tunnel Using P Wave Velocity Tomography )
¹Úö¼ö;»ç°ø¸í;¸ñ¿µÁø;±è´ë¿µ; Çѱ¹Ã¶µµ±â¼ú¿¬±¸¿ø öµµ±¸Á¶¿¬±¸½Ç;Çѱ¹Ã¶µµ±â¼ú¿¬±¸¿ø öµµ±¸Á¶¿¬±¸½Ç;°æÈñ´ëÇб³ Åä¸ñ°ÇÃà´ëÇÐ;Çö´ë°Ç¼³ ±â¼úǰÁú°³¹ß¿ø;
 
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ÅͳÎÀÇ ½Ã°øÀº Ç×»ó ÁÖº¯ ¾Ï¹ÝÀÇ ¼Õ»óÀ» ÃÊ·¡ÇÑ´Ù. ¹ß»ýÇÏ´Â ¼Õ»óÀÇ Á¤µµ´Â ÁÖº¯¾Ï¹ÝÀÇ ¿ªÇÐÀû ¹× ¼ö¸®ÇÐÀû °Åµ¿¿¡ ¿µÇâÀ» ¹ÌÄ£´Ù. º» ³í¹®¿¡¼­´Â Å©·Î½ºÈ¦ ½ÃÇèÀ» ÅëÇÏ¿© P ÆÄ ¼Óµµ¸¦ ÃøÁ¤ÇÏ¿© ÅͳÎÁÖº¯ ¾Ï¹ÝÀÇ ¼Õ»óÀ» °èÃøÇÏ¿´´Ù. ¹ßÁø°ø¿¡¼­ÀÇ Åº¼ºÆÄ ½ÅÈ£¹ß»ýÀ» À§ÇÏ¿© ±â°èÀûÀÎ Ãæ°ÝÀ» °¡ÇÏ¿´À¸¸ç ±× °á°ú·Î ¹ß»ýµÈ PÆÄ ½ÅÈ£´Â ÀâÀ½ÀÌ ÀûÀ¸¸ç ÆÄÀÇ Ãʵ¿ µµ´Þ½Ã°£ ÆÇº°ÀÌ ¿ëÀÌÇÏ¿´´Ù. ½ÇÇè°á°ú ¾Ï¹ÝÀÇ ¼Õ»óÀÌ ¿¹»óµÇ´Â ±¸°£¿¡¼­ P ÆÄÀÇ ¼Óµµ°¡ ³·°Ô °ËÃø µÇ¾ú´Ù. Å©·Î½ºÈ¦ °ø ³» ´ÙÁßÀÇ ÁöÁ¡¿¡¼­ P ÆÄ °èÃøÀ» ¼öÇàÇÏ¿© ÀÌÂ÷¿ø P ÆÄ Åä¸ð±×·¡ÇǸ¦ »ý¼ºÇÏ¿´´Âµ¥, »ý¼ºµÈ Åä¸ð±×·¡ÇÇ´Â ÅͳΠ¹è¸éÀÇ ¾Ï¹Ý ¼Õ»óÀÌ ¹ß»ýÇÑ ±¸°£¿¡ ´ëÇÑ °¡½ÃÀûÀÎ °á°ú¸¦ ³ªÅ¸³»¾ú´Ù. ÃøÁ¤µÈ PÆÄÀÇ ¼Óµµ·ÎºÎÅÍ °£±ØÀ² ¶Ç´Â Q °ª°úÀÇ »ó°ü°ü°è¸¦ ÅëÇØ ¾Ï¹Ý Ư¼ºÀÇ Á¤·®ÀûÀÎ ¼Õ»ó Æò°¡°¡ °¡´ÉÇÏ¿´´Ù.
Construction of a tunnel induces rock masses damage around the tunnel. The degree of damage produced on rock masses will affect on the mechanical and hydraulic behaviors of the rock masses. In this paper, P wave velocity measured by cross-hole test was used to assess rock masses damage around the test tunnel. Initiation of source signal was carried out using mechanical impact at the source installed borehole. In consequence, the generated P wave signal was low noise and apparent wave form, which allows accurate pick-up of first arrival time. From the test, the region where rock damage is expected shows relatively low P wave velocity. In addition, with multiple points of P wave velocity measurement along each cross-hole, two dimensional P wave tomography was obtained. The tomography provides apparent view of the rock damage behind the tunnel. The measured P wave velocity was correlated with features of rock masses, porosity and Q value.
 
Ű¿öµå
Cross-hole test;P wave velocity;Rockmass damage;Tomography;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.25, no.11, 2009³â, pp.53-60
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200908856855990)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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