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Çѱ¹Áö¹Ý°øÇÐȸ / v.24, no.9, 2008³â, pp.23-32
°è´Ü½Ä ºí·Ï½Ä º¸°­Åä ¿Ëº®ÀÇ Àüü ¾ÈÀü¼º
( Global Stability of Geosynthetic Reinforced Segmental Retaining Walls in Tiered Configuration )
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º» ³í¹®¿¡¼­´Â °è´Ü½Ä ÇüÅ·Π½Ã°øµÇ´Â ºí·Ï½Ä º¸°­Åä ¿Ëº®ÀÇ Àüü ¾ÈÁ¤¼ºÀÌ °í·ÁµÈ ¼³°è¿¡ °üÇÑ ³»¿ëÀ» ´Ù·ç¾ú´Ù. ´Ù¾çÇÑ °è¿ø°ú À̰ݰŸ®·Î ¼³°èµÈ ³× °¡Áö ¼³°è»ç·Ê¿¡ ´ëÇØ ÇöÀç Åë¿ëµÇ°í ÀÖ´Â FHWA ¹× NCMA ¼³°è±âÁØ¿¡ ±Ù°ÅÇÏ¿© ³» ¿ÜÀû ¾ÈÁ¤Çؼ®À» ¼öÇàÇÏ°í ±× °á°ú¸¦ Åä´ë·Î µÎ ¼³°è±âÁØÀÇ Â÷ÀÌÁ¡À» °ËÅäÇÏ¿´´Ù. ¾Æ¿ï·¯ ´ë»ó¿Ëº®¿¡ ´ëÇØ ÇѰèÆòÇüÇØ¼®¿¡ ±Ù°ÅÇÑ »ç¸é¾ÈÁ¤Çؼ®°ú ¿¬¼Óü¿ªÇÐ ±â¹ÝÀÇ °­µµ°¨¼Ò±â¹ý ÇØ¼®À» ¼öÇàÇÏ¿© °è´Ü½Ä ¿Ëº®ÀÇ ¼³°è¸¦ Áö¹èÇÏ´Â ÆÄ±« ¸ÞÄ«´ÏÁòÀ» °íÂûÇÏ¿´´Ù. ±× °á°ú ³» ¿ÜÀû ¾ÈÁ¤¼º °øÈ÷ FHWA¿¡¼­ äÅÃÇϰí ÀÖ´Â ¼³°è±âÁØÀÌ NCMA º¸´Ù º¸¼öÀûÀÎ °á°ú(³·Àº ¾ÈÀüÀ²)¸¦ ÁÖ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¶ÇÇÑ °è´Ü½Ä ¿Ëº®ÀÇ º¸°­ÀçÀÇ ¼Ò¿ä Æ÷¼³ ±æÀÌ´Â Àü¹ÝÀûÀ¸·Î Àüü ¾ÈÁ¤¼º¿¡ Á¿ìµÇ´Â °ÍÀ¸·Î °ËÅäµÇ¾úÀ¸¸ç »óºÎ ¿Ëº®ÀÇ º¸°­ÀçÀÇ ±æÀÌ´Â Çö ¼³°è±âÁØ º¸´Ù ÇöÀúÈ÷ Áõ°¡½ÃÄÑ¾ß ÇÏ´Â °ÍÀ¸·Î °ËÅäµÇ¾ú´Ù.
This paper presents the global stability of geosynthetic reinforced segmental retaining walls in tiered configuration. Four design cases of walls with different geometries and offset distances were analyzed based on the FHWA and NCMA design guidelines and the discrepancies between the different guidelines were identified. A series of global slope stability analyses were conducted using the limit-equilibrium analysis and the continuum mechanics based shear strength reduction method with the aim of identifying failure patterns and the associated factors of safety. The results indicated among other things that the FHWA design approach yields conservative results both in the external and internal stability calculations, i.e., lower factors of safety, than the NCMA design approach. It was also found that required reinforcement lengths are usually governed by the global slope stability requirement rather than the external stability calculations. Also shown is that the required reinforcement lengths for the upper tiers are much longer than those based on the current design guidelines.
 
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Geosynthetic-reinforced segmental retaining Wall;Geosynthetics;Global stability;Limit equilibrium;Finite element analysis;Shear strength reduction;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.24, no.9, 2008³â, pp.23-32
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200814852871960)
¾ð¾î : ¿µ¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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