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Çѱ¹Áö¹Ý°øÇÐȸ / v.23, no.11, 2007³â, pp.67-76
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( Estimation of Weight Distribution of Rockfall Block by Joint Measurement And Study on Its Application to Rockfall Simulation )
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³«¼®¿¡ ¿µÇâÀ» ÁÖ´Â ¿ä¼Ò·Î´Â ±â¿ï±â, ³ôÀÌ, Ç¥¸é °ÅÄ¥±â µîÀÇ ºñÅ»¸é ÇüÅÂ, ½Ä»ý, ÅðÀû¹°Áú µîÀÇ »ç¸é ±¸¼ºÀç·á ¹× ³«¼® Çü»ó, ¹«°Ô µîÀÌ ÀÖ´Ù. ÀÌµé ¿µÇâ¿ä¼Ò Áß ³«¼®ÀÇ Å©±â Áï, ¹«°Ô´Â ³«¼®½Ã¹Ä·¹ÀÌ¼Ç °á°ú¿¡ Å« ¿µÇâÀ» ¹Ìħ¿¡µµ ºÒ±¸ÇÏ°í ³«¼®¹«°Ô¿¡ ´ëÇÑ ¿¬±¸´Â ¸¹ÀÌ ÀÌ·ç¾îÁö°í ÀÖÁö ¾Ê´Ù. ¶ÇÇÑ, ³«¼®ÀÇ Å©±â´Â ÇöÀåÀÇ Àý¸®°£°Ý¿¡ ÀÇÇØ¼­ ¿µÇâÀ» ¸¹ÀÌ ¹ÞÀ¸¸ç, ÇöÀåÀÇ ¹ß»ý °¡´ÉÇÑ ³«¼®¹«°ÔºÐÆ÷´Â Àý¸®°£°ÝÀ» ÀÌ¿ëÇÏ¿© »êÁ¤ÇÒ ¼ö ÀÖ´Ù. µû¶ó¼­ º» ¿¬±¸¿¡¼­´Â Àý¸®°£°ÝÀ» ÀÌ¿ëÇϴ üÀûÀý¸®°³¼ö(volumetric Joint count, $J_{ u}$) ¹× $RQD-J_{ u}$ °ü°è¸¦ ÀÌ¿ëÇÏ¿© ³«¼®¹«°ÔºÐÆ÷¸¦ »êÁ¤ÇÏ¿´À¸¸ç, ÀÌ´Â ¿¬±¸ºÎÁö¿¡ ´ëÇÑ Á÷Á¢ÀûÀÎ ÇöÀ峫¼® Á¶»ç°á°ú ¹× ±âÁ¸ ¹®ÇåÀڷḦ ÀÌ¿ëÇÏ¿© ºñ±³ °ËÁõÀ» ¼öÇàÇÏ¿´´Ù. ³«¼®¹«°Ô ÃßÁ¤°á°ú ºÐ¼®¹æ¹ý¿¡ µû¶ó¼­ À¯»çÇÑ °á°ú¸¦ º¸ÀÌ´Â °ÍÀ¸·Î ºÐ¼®µÇ¾úÀ¸¸ç, 200kg ÀÌÇÏ´Â $75.3{sim}76.7%,;200{sim}400kg$Àº $15.0{sim}16.6%$, 400kg ÀÌ»óÀº $6.7{sim}9.7%$ÀÇ ºÐÆ÷¸¦ º¸ÀÌ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¶ÇÇÑ, ÇöÀåÀÇ ³«¼®¹«°ÔºÐÆ÷¿Í ºñ±³ÇÑ °á°ú À¯»çÇÑ ºÐÆ÷¸¦ º¸ÀÌ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. µû¶ó¼­ º» ¿¬±¸¿¡¼­ Á¦½ÃÇÑ ¹æ¹ýÀ¸·Î »êÁ¤ÇÑ ³«¼®¹«°ÔºÐÆ÷´Â ³«¼®½Ã¹Ä·¹À̼ÇÀÇ ÀÔ·Â ÀÚ·á·Î »ç¿ëÇÒ ¼ö ÀÖÀ» °ÍÀ¸·Î ÆÇ´ÜµÇ¸ç, ±× ÃßÁ¤ °á°ú¸¦ º» ÇöÀå»ç¸éÀÇ ³«¼® °ËÅä½Ã »ç¿ëÇÒ °æ¿ì °æÁ¦ÀûÀÎ °ËÅä°á°ú¸¦ º¸ÀÌ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù.
The characteristics of rockfall are determined by virtually all factors and conditions e.g. the physical figure of the slope such as inclination, height, roughness, the elemental figure of the slope such as vegetation and material deposited, and the shape and weight of the rockfall itself. Although it is one of the major factors to be considered in rockfall simulation, little attention has been given to the weight of the rockfall. And, since the size of the rockfall is dominated by joint spacing, the distribution of the rockfall block weight can be predicted as a function of the joint spacing. In this study, the weight distribution of rockfall was estimated by using the method of volumetric joint count, $J_{ u}$, based on joint spacing, and $RQD-J_{ u}$. The results indicate that the weight distributions were analogous in two methods, and the distribution was to be $75.3{sim}76.7%$ for 200 kilograms or lesser, $15.0{sim}16.6%$ for $200{sim}400$ kilograms, and $6.7{sim}9.7%$ for 400 kilograms or more, which show good matches with the actual on-site weight distribution. Therefore, the weight distribution of rockfall suggested in this paper is able to be considered as appropriate data for rockfall simulation.
 
Ű¿öµå
Joint spacing;Rockfall;Rockfall simulation;Scanline survey;Volumetric joint count;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.23, no.11, 2007³â, pp.67-76
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200706414119166)
¾ð¾î : Çѱ¹¾î
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