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Çѱ¹Áö¹Ý°øÇÐȸ / v.23, no.5, 2007³â, pp.5-14
¸¶ÀÌÅ©·ÎÆÄÀÏ·Î º¸°­µÈ ±³·®±âÃÊÀÇ Á¤±ÔÈ­ °Åµ¿ Æò°¡
( Evaluation of Normalized Behaviors of Bridge Foundations Reinforced by Micropiles )
¹Ú¼º¿Ï;Á¤µ¿Áø;°û±â¼®;ÀÌÁÖÇü; ´Ü±¹´ëÇб³ Åä¸ñȯ°æ°øÇаú;´Ü±¹´ëÇб³ ´ëÇпø Åä¸ñȯ°æ°øÇаú;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø Áö¹Ý¿¬±¸ºÎ;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø Áö¹Ý¿¬±¸ºÎ;
 
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º» ¿¬±¸¿¡¼­´Â ¸¶ÀÌÅ©·ÎÆÄÀÏ·Î º¸°­µÈ ±âÁ¸ ±³·®±âÃÊ¿¡ ´ëÇÑ Á¤±ÔÈ­ °Åµ¿À» Æò°¡ÇÏ¿´´Ù. ±âÁ¸ ±³·®±âÃÊ¿¡ ´ëÇÑ º¸°­È¿°ú¸¦ Á¤·®È­ÇÏ°í ¸¶ÀÌÅ©·ÎÆÄÀÏÀÇ °Åµ¿À» ¿¹ÃøÇϱâ À§ÇÏ¿© À¯ÇÑ¿ä¼ÒÇØ¼®¿¡ ÀÇÇÑ ¼öÄ¡ÇØ¼®À» ½Ç½ÃÇÏ¿´´Ù. ¶ÇÇÑ °æ»çÁö°Ô º¸°­µÈ ¸¶ÀÌÅ©·ÎÆÄÀÏÀÇ ¼³Ä¡È¿°ú¸¦ ¼öÁ÷À¸·Î º¸°­µÈ °æ¿ì¿¡ ´ëÇÏ¿© ºñ±³ÇÏ¿´´Ù. ÇØ¼®°á°ú °æ»çÁø ¸¶ÀÌÅ©·ÎÆÄÀÏÀÌ ±âÁ¸±³·® ±âÃÊ¿¡ º¸°­ÇÑ °æ¿ì ¼öÁ÷ÀÇ °æ¿ì ¼öÁ÷, ¼öÆòÇÏÁß¿¡ ´ëÇÏ¿© °¢°¢ º¯À§¸¦ Àú°¨½ÃÄÑ È¿°úÀûÀÎ º¸°­ÀÌ µÇ°í ÀÖÀ¸¸ç È¿°ú°¡ Å­À» È®ÀÎÇÏ¿´´Ù. ÇÑÆí ¸¶ÀÌÅ©·ÎÆÄÀÏÀÇ º¸°­ °¢µµ´Â ¼öÁ÷ÇÏÁßÀÌ ÀÛ¿ëÇÏ´Â °æ¿ì $15^{circ}{sim}20^{circ}$¿¡¼­ °¡Àå Å« È¿À²À» ³ªÅ¸³ÂÀ¸¸ç, ¼öÆòÇÏÁßÀÌ ÀÛ¿ëÇÏ´Â °æ¿ì ¸¶ÀÌÅ©·ÎÆÄÀÏÀÇ º¸°­ °¢µµ°¡ Áõ°¡ÇÔ¿¡ µû¶ó ±× È¿°ú°¡ ³ªÅ¸³µ´Ù. µû¶ó¼­ ¸¶ÀÌÅ©·ÎÆÄÀÏ¿¡ ÀÇÇÑ ±âÁ¸ ±³·®±âÃÊ¿¡ ´ëÇÑ º¸°­Àº ±âÃÊÀÇ °ø¿ë¼º´ÉÀ» Çâ»ó½Ãų ¼ö ÀÖ´Â ÇϳªÀÇ ¹æ¹ýÀÌ µÇ°í ÀÖÀ½À» Àß º¸¿©ÁÖ°í ÀÖ´Ù.
The purpose of this study is to evaluate the normalized behaviors of existing bridge foundations reinforced by micropiles. In order to do numerical method a finite element program was used to predict the micropile behavior and quantify their reinforcing effects on existing bridge foundations. In addition, the installation effects of battered micropiles on existing foundations were compared with vertically reinforced bridge foundations. Based on the study performed, it was found that the use of battered micropiles more efficiently reduces displacement of existing foundations than vertically installed micropiles under vertical and horizontal loadings, respectively. The batter angle of micropiles was also found to be most effective at about $15^{circ}{sim}20^{circ}$ in reducing the vertical displacement. The horizontal reinforcing effect continues to be larger with an increase in batter angles. So, it is believed that the results presented could give an idea to enhance In-service performance of existing bridge foundations reinforced by micropiles.
 
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Bridge foundation;Finite element analysis;Micropile;Performance;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.23, no.5, 2007³â, pp.5-14
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200724737435034)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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