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Çѱ¹Áö¹Ý°øÇÐȸ / v.9, no.2, 1993³â, pp.41-54
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ÀÌÁúÅäÃþ»ç¸éÀÇ ´ë¼ö´©¼±ÆÄ¾ç¿¡ ´ëÇÑ ¾ÈÁ¤Çؼ®
( Stability Analysis of Nonhomogeneous Slopes by Log -spiral Failure Surface ) |
| ±è¿µ¼ö;¼Àμ®;¹é¿µ½Ä; °æºÏ´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;°æºÏ´ëÇб³ ´ëÇпø Åä¸ñ°øÇаú ´ëÇпø, °æÈñ´ëÇб³ °øÀÚ´ëÇÐ Åä¸ñ°øÇаú;;
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| º» ¿¬±¸´Â ÀÌÁúÅäÃþÀÇ c-oÈë»ç¸é¿¡ ´ëÇÑ 2Â÷¿ø ¹× 3Â÷¿ø ¾ÈÁ¤Çؼ®À» Á¦½ÃÇÑ´Ù. °¡´ÉÆÄ±«¸éÀº ÃþÀÇ °æ°è¿¡¼ ÆÄ±«¸éÀÌ ³»ºÎ¸¶Âû°¢¿¡ µû¶ó ±¼ÀýµÇ´Â ´ë¼ö³ª¼±°î¼±À» »ç¿ëÇÏ¿´´Ù. 3 Â÷¿ø ÇØ¼®¿¡¼´Â ȸÀüȰµ¿Å䱫´Â, Á߾Ӻδ CylindroidÀÌ°í ¾çÂÊ ³¡´ÜÀº Æò¸éÀ¸·Î »ç¿ëÇÏ¿´ ´Ù. ÁöÁø·ÂÀº ¼öÆò ¹× ¼öÁ÷Áøµµ¸¦ °í·ÁÇÏ¿´´Ù. °³¹ßÇÑ ÇÁ·Î±×·¥À» PCSTABLS¿Í ºñ±³ÇÏ¿´°í, 2Â÷¿ø ÃÖ¼Ò¾ÈÀüÀ²¿¡ ´ëÇÑ 3Â÷¿øÀÇ ÃÖ¼Ò¾ÈÀüÀ²ÀÇ ºñ¸¦ Á¶»çÇÏ¿´°í, »ç¸é³ôÀÌ¿¡ ´ëÇÑ Cylindroid±æÀÌÀÇ ºñ¿¡ µû¸¥ ¾ÈÀüÀ²ÀÇ º¯È¸¦ °ËÅäÇÏ¿´´Ù. ±×¸®°í ÀýÆíÀÇ ¼ö¿¡ µû¸¥ ¾ÈÀüÀ²ÀÇ º¯ ȵµ Á¶»çÇÏ¿´´Ù. ÀÌ·¯ÇÑ °ÍÀ» ±âÃÊ·Î ´ÙÀ½ÀÇ °á°ú°¡ ¾ò¾îÁ³´Ù : (1)º» ¿¬±¸¿¡¼ °³¹ßµÈ ÇÁ·Î±×·¥ÀÇ 2Â÷¿ø ¾ÈÀüÀ²ÀÌ PCSTABLSº¸´Ù´Â ´õ Å©°Ô ³ªÅ¸³µ´Ù. (2)º» ¿¬±¸ÀÇ 2Â÷¿ø ¾ÈÀüÀ²Àº ÈëÀÇ ³»ºÎ ¸¶ Âû°¢ÀÌ Áõ°¡ÇÔ¿¡ µû¶ó PCSTABLSº¸´Ù ´õ Å«Â÷À̸¦ ³ªÅ¸³Â´Ù. (3) 3Â÷¿ø ¾ÈÀüÀ²Àº 2Â÷¿ø ¾ÈÀüÀ²º¸´Ù ´õ Å©°Ô ³ªÅ¸³µ´Ù. µû¶ó¼ 3Â÷¿øÈ¿°ú´Â ¾ÈÀüÀ²À» Áõ°¡½ÃŰ´Â °æÇâÀÌ ÀÖ´Ù. (4) »ç¸éÀÇ ³ôÀÌ¿¡ ´ëÇÑ 3Â÷¿ø ÆÄ±«Å䱫ÀÇ ÆøÀÇ ºñ, bye°¡ Áõ°¡ÇÔ¿¡ µû¶ó 2Â÷¿ø ¾ÈÀüÀ²¿¡ ´ëÇÑ Æø, b¸¦ °¡Áø 3Â÷¿ø ¾ÈÀüÀ²ÀÇ ºñ, Fb/F°Å °ªÀº °¨¼ÒÇÏ¿´°í, bye°¡ ¾à 14ÀÌ»óÀ̸é 1.0¿¡ ±ÙÁ¢ Çß´Ù. (4) 2Â÷¿ø ¾ÈÀüÀ²¿¡ ´ëÇÑ Æø, b¸¦ °¡Áø 3Â÷¿ø ¾ÈÀüÀ²ÀÇ ºñ, Fb/F°Å °ªÀº Àü´Ü°µµÁ¤¼ö, ÁöÇϼöÀ§ ±×¸®°í ¼öÆòÁøµµÀÇ °ª¿¡ ¸Å¿ì ¹Î°¨ÇÑ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. (5) º» ¿¬±¸¿¡¼ °³¹ßµÈ ÇÁ·Î±×·¥À» »ç¿ëÇÏ¿© ¾ÈÀüÀ²À» °è»êÇÒ¶§,ÀýÆíÀÇ ¼ö´Â 30~40°³ Á¤µµ¸é Àû´çÇÏ¿´´Ù. |
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| This paper presents the two and three -dimensional stability analysis of nonhom- ogeneous, c-o soil slopes. Potential failure surface is assumed as a logspiral curve refracted in boundaries of layers. In 3-D analysis, rotational soil mass is assumed with a cylindroid central part terminated with plane ends. Seismic force is considered by sesmic intensity. The program developed in this study is compared with the program PCSTABLS. The ratio of three-dimensional minimum factor of safety to two-dimensional case is examined and factor of safety changes are showed for the ratio of cylindroid length to slope height and numbers of slice. On such bases the following conclusions may by made : (1) The program developed in this program is less conservative than the program PCSTABLS. (2) The value of F2 of this study shows the larger differences than that of PCSTABLS with increasing friction angle (3) Factors of safety computed for 3-D geometry differ considerablely from ordinary 2-D factors of safety. Since Fb/F2 exceeds unity, three -dimensional effects tend to increase the factor of safety. (4) As the ratio of three - dimensional failure width of slope height, b/H increase, the value of Fb/Ff decreases and approaches 1.0 when bye is 14. (5) In calculating the factor of safety using the developed program the number of slices is suitable with the ranges of 30-40 |
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Çѱ¹Áö¹Ý°øÇÐȸÁö:Áö¹Ý / v.9, no.2, 1993³â, pp.41-54
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-215X
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199311920444997)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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