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Çѱ¹Áö¹Ý°øÇÐȸ / v.15, no.3, 1999³â, pp.161-176
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( Modeling the Effect of Water, Excavation Sequence and Reinforcement on the Response of Tunnels ) |
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| º» ³í¹®¿¡¼´Â ±âÁ¸ÀÇ ºÒ¿¬¼Ó º¯Çü ÇØ¼®(DDA) ¹æ¹ý¿¡ ´ëÇÑ ¼¼°¡Áö ¹æÇâÀÇ »õ·Î¿î °³¼± ¹æ¹ýµéÀÌ Á¦½ÃµÇ¾ú´Ù. ÀÌ °³¼± ¹æ¹ýµéÀº ¾Ï¹Ý ±Õ¿¿¡¼ ¾Ï¼® ºí·Ï°ú ÁöÇϼö È帧ÀÇ ¼ö¸®-¿ªÇÐÀû Ä¿Çøµ, ¿¬¼ÓÀûÀÎ ÇÏÁß ÀçÇÏ ¶Ç´Â Á¦ÇÏ, ±×¸®°í ·Ïº¼Æ®, ¼ôÅ©¸®Æ®¿Í ÄÜÅ©¸®Æ® ¶óÀ̴׿¡ ÀÇÇÑ º¸°À¸·Î ±¸¼ºµÇ¾ú´Ù. Shi (1988)¿Í Lin (1995)¿¡ ÀÇÇÑ ±âÁ¸ DDA ÇÁ·Î.±×·¥Àº ÀÌ ¹æ¹ýµé¿¡ ÀÇÇÏ¿© Ãß°¡·Î °³¼±µÇ¾úÀ¸¸ç, ÀÌ »õ·Î¿î DDAÇÁ·Î±×·¥¿¡ ´ëÇÑ ¸î °¡Áö Àû¿ë¿¹µéÀÌ Á¦½ÃµÇ¾ú´Ù. ¶ÇÇÑ, °æºÎ°í¼Óöµµ °ø»çÀÇ ÀϺÎÀÎ ¿îÁÖ ÅͳÎÀÇ ÁöÇϱ¼Âø¿¡ ´ëÇÑ ½Ã¹Ä·¹À̼ÇÀ» ÅëÇÏ¿© Àý¸®¸¦ ÅëÇÑ ÁöÇϼöÀÇ È帧, ±¼Âø¼ø¼, ±×¸®°í ·Ïº¼Æ®¿Í ¼ôÅ©¸®Æ®¿¡ ÀÇÇÑ º¸°ÀÌ ÅͳξÈÁ¤¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ¿¬±¸ÇÏ¿´´Ù. ±× °á°ú Àý¸®¸¦ ÅëÇÑ ÁöÇϼöÀÇ È帧°ú ºÎÀûÀýÇÑ ±¼Âø¼ø¼´Â ÅͳÎÀÇ ¾ÈÁ¤¼º¿¡ ¾Ç¿µÇâÀ» ¹ÌÄ¡³ª, ÇÑÆí ·Ïº¼Æ®¿Í ¼ôÅ©¸®Æ®¿¡ ÀÇÇÑ º¸°Àº ÅͳÎÀ» ¾ÈÁ¤È ½ÃŲ´Ù´Â »ç½ÇÀ» ¹àÇô³Â¾ú´Ù. ±× °á°ú ¼¼°¡Áö °³¼±¹æ¹ýÀÌ Ãß°¡µÈ DDAÇÁ·Î±×·¥Àº ÁöÇϱ¸Á¶¹° ¼³°è¿¡ ÀÖ¾î¼ À¯¿ëÇÑ ÇØ¼®¹æ¹ýÀ¸·Î »ç¿ëµÉ ¼ö ÀÖ´Ù´Â »ç½ÇÀ» º¸¿©ÁÖ¾ú´Ù. |
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| A powerful numerical method that can be used for modeling rock-structure interaction is the Discontinuous Deformation Analysis (D D A) method developed by Shi in 1988. In this method, rock masses are treated as systems of finite and deformable blocks. Large rock mass deformations and block movements are allowed. Although various extensions of the D D A method have been proposed in the literature, the method is not capable of modeling water-block interaction, sequential loading or unloading and rock reinforcement; three features that are needed when modeling surface or underground excavation in fractured rock. This paper presents three new extensions to the D D A method. The extensions consist of hydro-mechanical coupling between rock blocks and steady water flow in fractures, sequential loading or unloading, and rock reinforcement by rockbolts, shotcrete or concrete lining. Examples of application of the D D A method with the new extensions are presented. Simulations of the underground excavation of the ulcornerUnju Tunnelulcorner in Korea were carried out to evaluate the influence of fracture flow, excavation sequence and reinforcement on the tunnel stability. The results of the present study indicate that fracture flow and improper selection of excavation sequence could have a destabilizing effect on the tunnel stability. On the other hand, reinforcement by rockbolts and shotcrete can stabilize the tunnel. It is found that, in general, the D D A program with the three new extensions can now be used as a practical tool in the design of underground structures. In particular, phases of construction (excavation, reinforcement) can now be simulated more realistically. |
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| Ű¿öµå |
| Discontinuous deformation analysis;Blocky rock masses;Hydro-mechanical coupling;Excavation sequence;Rock reinforcement;Rockbolts;Shotcrete;Tunnel stability;Construction phases.; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.15, no.3, 1999³â, pp.161-176
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199911921749265)
¾ð¾î : ¿µ¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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