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Çѱ¹Áö¹Ý°øÇÐȸ / v.16, no.1, 2000³â, pp.51-64
°­¿ìħÅõ¿¡ µû¸¥ ºÒÆ÷È­ Åä»ç»ç¸éÀÇ ¾ÈÁ¤Çؼ®
( Slope Stability Analysis of Unsaturated Soil Slopes Due to Rainfall Infiltration )
Á¶¼ºÀº;À̽·¡; Çѱ¹°úÇбâ¼ú¿ø Åä¸ñ°øÇаú;Çѱ¹°úÇбâ¼ú¿ø Åä¸ñ°øÇаú;
 
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º» ¿¬±¸´Â °­¿ìÀÇ Ä§Åõ·Î ÀÎÇÑ ºÒÆ÷È­ Åä»ç»ç¸éÀÇ ¾ÈÁ¤ ÇØ¼®À» À§ÇÑ ÀýÂ÷¸¦ Á¦½ÃÇÑ´Ù. °­¿ì ħÅõ·Î ÀÎÇÑ »ç¸éÀÇ °Åµ¿Àº È帧°ú º¯ÇüÀÌ ¿¬°üµÈ ÀÌÂ÷¿ø À¯ÇÑ¿ä¼ÒÇØ¼®À» ÅëÇÏ¿© ÇØ¼®µÈ´Ù. ½Ã°£¿¡ µû¸¥ ¾ÈÀüÀ²À» °è»êÇϱâ À§ÇÏ¿© À¯ÇÑ¿ä¼Ò ÇØ¼®¹ýÀ» ÅëÇÑ ÀÀ·ÂÀå(stress field)À¸·ÎºÎÅÍ °¡»óȰµ¿¸é¿¡ ´ëÇÑ ¾ÈÀüÀ²À» »êÁ¤ÇÒ ¼ö ÀÖµµ·Ï ÇÏ´Â Á¤±³ÇÑ ÀÀ·ÂÀûºÐ±â¹ýÀ» Àû¿ëÇÏ¿´°í ±âÇÏÇÐÀûÀ¸·Î Çã¿ë°¡´ÉÇÑ È°µ¿´Ü¸éÀÇ Çü»óÀ» À¯ÁöÇϸ鼭 ÇÕ¸®ÀûÀ¸·Î ÀÓ°è´Ü¸éÀ» ã¾Æ°¡´Â ÃÖÀûÈ­¹æ¹ýÀ» Àû¿ëÇÔÀ¸·Î½á °­¿ì¿¡ ÀÇÇÑ Åä»ç»ç¸éÀÇ ¾ÈÁ¤¼º Æò°¡ ÀýÂ÷¸¦ °³¹ßÇÏ¿´´Ù. ¶ÇÇÑ À̸¦ ÀÌ¿ëÇÏ¿© °­¿ìħÅõ½Ã Åõ¼ö°è¼öÀÇ °ø°£ÀûÀÎ º¯È­°¡ ºÒÆ÷È­Åä»ç»ç¸éÀÇ ÆÄ±« °Åµ¿¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» º¸´Ù °øÇÐÀûÀ̰í ÇÕ¸®ÀûÀÎ ¹æ¹ýÀ¸·Î ¿¬±¸ÇÏ¿´´Ù. ¿¬±¸°á°ú¿¡ ÀÇÇϸé Åõ¼ö°è¼öÀÇ ºÒ±ÕÁúÇÑ ºÐÆ÷·Î ÀÎÇÏ¿© °­¿ì¿¡ ÀÇÇÑ »ç¸éÇ¥¸éÀÇ ±¹ºÎÀûÀÎ ÆÄ±«¿µ¿ªÀÌ ¹ß»ýÇÒ ¼ö ÀÖ°í ÀÌ·¯ÇÑ ¿µ¿ªÀÌ Á¡Á¡ È®´ëµÇ¾î ÀüüÀûÀÎ ÆÄ±«¿¡ À̸£°Ô µÈ´Ù. ±×·¯¹Ç·Î ½Ã°£ÀÇÁ¸Àû ÀÎ »ç¸é¾ÈÁ¤Çؼ® ¹®Á¦ÀÇ °æ¿ì ÀÌ·¯ÇÑ ±¹ºÎÀûÀÎ ÆÄ±« ¿µ¿ªÀÇ ¿µÇâÀ» ´õ ÀÌ»ó ¹«½ÃÇÒ ¼ö ¾ø´Ù.
This paper presents a procedure of calculating a safety factor of the unsaturated slope suffering from the rainfall infiltration. The process of infiltration into a slope due to rainfall and its effect on the behavior of the soil slope are examined by using a two dimensional finite element flow-deformation coupled analysis. A factor of safety is calculated at various elapsed times after the commencement of rainfall as in the following procedure. First, stresses are estimated at each Gaussian point from the coupled finite element analysis. Then, the global stress smoothing method is applied to get a continuous stress field. Based on this stress field, a factor of safety is calculated for a specified slip surface by a stress integration scheme. Then, a search strategy is used to find out a critical slip surface which is associated with the minimum factor of safety. Some numerical examples are analyzed in order to study the effect of hydraulic conductivity on the slope stability during rain-induced infiltration. According to the results, local failure zone can be formed near the slope surface due to inhomogeneous distribution of hydraulic conductivity If the failure zone is once formed, then the region extends until a large amount of slide activates. Therefore the local failure can be neglected no longer in the stability analysis.
 
Ű¿öµå
Factor of safety;Rainfall infiltration;Hydraulic conductivity;Finite element analysis;Stress smoothing.;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.16, no.1, 2000³â, pp.51-64
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200011921750029)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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