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Çѱ¹Áö¹Ý°øÇÐȸ / v.24, no.5, 2008³â, pp.65-78
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( A Study on Jointed Rock Mass Properties and Analysis Model of Numerical Simulation on Collapsed Slope )
±¸È£º»;±è½ÂÈñ;±è½ÂÇö;ÀÌÁ¤¿±; Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø Áö¹æ¹æÀç.ȯ°æ¿¬±¸½Ç;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø Áö¹æ¹æÀç.ȯ°æ¿¬±¸½Ç;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø Áö¹æ¹æÀç.ȯ°æ¿¬±¸½Ç;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø Áö¹æ¹æÀç.ȯ°æ¿¬±¸½Ç;
 
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ÀýÅä»ç¸é ¹× õ½Éµµ ÅͳÎÀÇ °æ¿ì ºÒ¿¬¼Ó¸éÀ» µû¸¥ ºí·ÏÀÇ ¹Ì²ô·¯Áü ¹× ȸÀü µîÀÌ ¾ÈÁ¤¼º¿¡ Å« ¿µÇâÀ» ¹ÌÄ£´Ù. ÀýÅä»ç¸éÀ̳ª ÅͳÎÀÇ Ãʱ⠼³°è ´Ü°è¿¡¼­ ¾ÈÁ¤¼º °ËÅ並 À§ÇØ ¼öÄ¡ÇØ¼®À» ³Î¸® »ç¿ëÇϴµ¥, ´ëºÎºÐÀÇ »ó¿ëÈ­µÈ ÇÁ·Î±×·¥µéÀº ¿¬¼Óü ÇØ¼®¿¡ ±â¹ÝÀ» µÎ°í ÀÖ´Ù. ºÒ¿¬¼Ó¸éÀ» °í·ÁÇÏ¿© ¿¬¼Óü ÇØ¼®À» ¼öÇàÇÒ ¼öµµ ÀÖÀ¸¸ç, Àý¸®¸¦ Æ÷ÇÔÇÑ ¾Ï¹ÝÀÚüÀÇ °­µµ¸¦ °¨¼Ò½ÃÅ´À¸·Î½á ¸ð»çÇÏ´Â °ÍÀÌ ´ëÇ¥ÀûÀÎ ¹æ¹ýÀÌ´Ù. ¶ÇÇÑ, ¿¬¼Óü ÇØ¼®¹æ¹ýÀÎ Mohr-Coulomb ¸ðµ¨¿¡ ÆíÀç Àý¸®¸ðµ¨ (ubiquitous joint model)À» Àû¿ëÇÔÀ¸·Î½á ºÒ¿¬¼Ó¸éÀ» °í·ÁÇÏ´Â ¹æ¹ýÀÌ ÀÖ´Ù. ÀýÅä»ç¸éÀÇ ¼öÄ¡ÇØ¼®½Ã ÁÖ ÀÔ·ÂÄ¡ÀÎ Àý¸®¾Ï¹ÝÀÇ Á¡Âø·Â, ¸¶Âû°¢, ź¼º°è¼ö µîÀº ¾Ï¹ÝºÐ·ù¹ý(rock classification system)¿¡ ÀÇÇÑ °æÇè½ÄÀ¸·Î µµÃâÇÒ ¼ö ÀÖÀ¸¸ç, º» ³í¹®¿¡¼­´Â ÀÌ Áß RMR ¹× GSI ½Ã½ºÅÛ¿¡ ÀÇÇÑ °æÇè½ÄÀ» ÅëÇØ ¾òÀº ÀÔ·ÂÄ¡¸¦ ½ÇÁ¦ À§ÇèÀýÅä»ç¸é¿¡ Àû¿ëÇÔÀ¸·Î½á µÎ ½Ã½ºÅÛÀÇ Â÷À̸¦ ºñ±³ÇØ º¸°íÀÚ ÇÏ¿´´Ù. ¶ÇÇÑ RMR ¹× GSI ½Ã½ºÅÛÀ¸·Î µµÃâÇÑ ÀÔ·ÂÄ¡¿¡ ÆíÀçÀý¸®¸ðµ¨À» È¥ÇÕÇÏ¿© Àû¿ëÇÔÀ¸·Î½á °èÃøÀ» ÅëÇØ ¾òÀº º¯À§·® ¹× º¯À§¾ç»ó°úÀÇ Â÷À̸¦ ºÐ¼®ÇÏ¿´´Ù. ºÐ¼® °á°ú GSI ½Ã½ºÅÛÀ¸·Î µµÃâÇÑ ÀÔ·ÂÄ¡¿¡ ÆíÀçÀý¸®¸ðµ¨À» È¥ÇÕÇÏ¿´À» °æ¿ìÀÇ ¼öÄ¡ÇØ¼®°á°ú°¡ ½ÇÁ¦ÇöÀåÀÇ º¯À§·® ¹× º¯À§¾ç»ó°ú °¡Àå À¯»çÇÑ °á°ú¸¦ ¾òÀ» ¼ö ÀÖÀ½À» È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù.
In case of cut-slopes or shallow-depth tunnels, sliding along with discontinuities or rotation could play a critical role in judging stability. Although numerical analysis is widely used to check the stability of these cut-slopes and shallow-depth tunnels in early design process, common analysis programs are based on continuum model. Performing continuum model analysis regarding discontinuities is possible by reducing overall strength of jointed rock mass. It is also possible by applying ubiquitous joint model to Mohr-Coulomb failure criteria. In numerical analysis of cut-slope, main geotechnical properties such as cohesion, friction angle and elastic modulus can be evaluated by empirical equations. This study tried to compare two main systems, RMR and GSI system by applying them to in-situ hazardous cut-slopes. In addition, this study applied ubiquitous joint model to simulation model with inputs derived by RMR and GSI system to compare with displacements obtained by in-situ monitoring. To sum up, numerical analysis mixed with GSI inputs and ubiquitous joint model proved to provide most reliable results which were similar to actual displacements and their patterns.
 
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Cut-slope;FLAC;GSI;RMR;Ubiquitous joint model;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.24, no.5, 2008³â, pp.65-78
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200816256327223)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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