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Çѱ¹Áö¹Ý°øÇÐȸ / v.22, no.8, 2006³â, pp.25-31
ºÎ¸¶Âû·ÂÀÌ ÀÛ¿ëÇÏ´Â ±âÃÊÆÇÀ¸·Î ¿¬°áµÈ ±º¸»¶ÒÀÇ °Åµ¿
( The Influence of Negative Skin Friction on Piles in Groups Connected to a Cap )
ÀÌöÁÖ;¹Úº´¼ö; °­¿ø´ëÇб³ Åä¸ñ°øÇаú;(ÁÖ)Áö¿ÏÅ×Å©;
 
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¾Ð¹ÐÀÌ ÁøÇà ÁßÀÎ Áö¹Ý¿¡ ±ÙÀÔµÈ ±âÃÊÆÇÀ¸·Î ¿¬°áµÈ ¸»¶ÒÀÇ °Åµ¿°ú °ü·ÃµÈ ¿¬±¸´Â ±âÃÊÆÇÀ¸·Î ¿¬°áµÇÁö ¾ÊÀº ±º¸»¶ÒÀÇ °Åµ¿¿¡ °üÇÑ ¿¬±¸¿¡ ºñÇÏ¿© ¸Å¿ì ºÎÁ·ÇÑ ½ÇÁ¤ÀÌ´Ù. º» ³í¹®¿¡¼­´Â ÀÏ·ÃÀÇ 3Â÷¿ø ¼öÄ¡ÇØ¼®À» ÅëÇØ¼­ ¾Ð¹ÐÀÌ ÁøÇàÁßÀÎ Áö¹Ý¿¡ ±ÙÀÔµÈ ±º¸»¶ÒÀÇ °Åµ¿¿¡ ´ëÇÑ ¿¬±¸¸¦ ¼öÇàÇÏ¿´´Ù. ¸»¶Ò-Áö¹Ý °æ°è¸é¿¡¼­ÀÇ Ç׺¹(slip)À» °í·ÁÇÏÁö ¾ÊÀº ź¼ºÇؼ® ¹× slipÀ» °í·ÁÇÑ Åº-¼Ò¼º ÇØ¼®À» ½Ç½ÃÇÏ¿´´Ù. º» ¿¬±¸ °á°ú, ±âÃÊÆÇ°ú ¿¬°áµÈ ¸»¶ÒÀÇ °æ¿ì ÀÎÀå·ÂÀÌ ¿Ü°ûºÎ ¸»¶Ò µÎºÎºÎ±Ù¿¡¼­ ¹ß»ýÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ°í, ź¼ºÀ̷п¡ ÀÇÇÑ ÇØ¼® ¹× slipÀ» °í·ÁÇÏÁö ¾ÊÀº ÇØ¼®Àº ÀÌ·¯ÇÑ ÀÎÀå·ÂÀ» °ú´ëÆò°¡ÇÏ´Â °ÍÀ¸·Î ÇØ¼®µÇ¾ú´Ù. ¶ÇÇÑ ¿Ü°ûºÎ ¸»¶ÒÀÇ ÀÎÀå·Â ¹ß»ýÀº ¸»¶ÒÀÇ °£°Ýº¸´Ù´Â ±º¸»¶Ò ³»ÀÇ ¸»¶Ò°³¼ö¿¡ ´õ Å« ¿µÇâÀ» ¹Þ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ÇâÈÄ ºÎ¸¶ÂûÀÇ ¿µÇâÀ» ¹Þ´Â ¸»¶ÒÀÇ ¼³°è½Ã ¸»¶Ò-±âÃÊÆÇ °áÇÕºÎÀÇ ÆÄ¼ÕÀ» ¹æÁöÇϱâ À§ÇØ, ¿Ü°ûºÎ ¸»¶Ò¿¡ ÀÛ¿ëÇÏ´Â ÀÎÀå·ÂÀ» °í·ÁÇØ¾ß ÇÒ °ÍÀ¸·Î ºÐ¼®µÇ¾ú´Ù.
Over the years the investigation of behaviour of piles in groups connected to a cap in consolidating soil has attracted far less attention than the study of isolated piles in groups. In this paper, a series of three-dimensional numerical simulations have been performed to study the behaviour of pile groups connected to a cap in consolidating ground. Both elastic no-slip and elasto-plastic slip analyses were considered. Based on the analysis results, when piles were connected to a cap, tensile forces were developed near the pile head at the outer piles. Elastic solution and no-slip analysis over-predicted the tensile force near the pile head for outer piles. Relatively speaking, the number of piles in a group is more important than the pile spacing in terms of the influence of negative skin friction on the pile behaviour. The issue on the development of tensile forces on the pile head at the outer piles is perhaps needed to be carefully considered in the pile design to prevent the damages of the pile-cap connection.
 
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Clays;Numerical modelling and analysis;Piles;Soil/structure interaction;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.22, no.8, 2006³â, pp.25-31
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200634741580287)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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