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Çѱ¹Áö¹Ý°øÇÐȸ / v.21, no.10, 2005³â, pp.5-16
Áö¿À±×¸®µå¿Í ¸»¶ÒÀ¸·Î º¸°­µÈ ¼ºÅäÁö¹ÝÀÇ º¸°­ ¹× ¾ÆÄªÈ¿°ú ¿¬±¸
( Reinforcement and Arching Effect of Geogrid-reinforced and Pile-supported Embankments )
¿À¿µÀÎ;½ÅÀºÃ¶; Çѱ¹³óÃ̰ø»ç ³ó¾îÃÌ¿¬±¸¿ø ³ó°ø±â¼ú¿¬±¸½Ç;ÀÎõ´ëÇб³ Åä¸ñȯ°æ½Ã½ºÅÛ°øÇаú;
 
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Åä¸ñ¼¶À¯·Î º¸°­µÈ ¼ºÅäÁöÁö¸»¶Ò°ø¹ýÀº ±âÁ¸ ¼ºÅäÁöÁö¸»¶Ò°ø¹ýÀÇ ¸»¶Ò°£°Ýó¸® ¹× ¸»¶Òĸ ¸éÀû¹®Á¦¸¦ °³¼±Çϸç È¿°úÀûÀ¸·Î ÁöÁö·ÂÀ» º¸°­ÇÏ°í Æ¯È÷ ÀüüħÇÏ ¹× ºÎµîħÇÏ °¨¼Ò½Ãų ¼ö ÀÖ´Â °ø¹ýÀ¸·Î Ãֱ٠Ȱ¿ëÀÌ Áõ°¡Çϰí ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â Áö¿À±×¸®µå·Î º¸°­µÈ ¼ºÅäÁöÁö¸»¶Ò°ø¹ýÀÇ º¸°­ ¹× ¾ÆÄªÈ¿°ú¿¡ ´ëÇÏ¿© ¿¬±¸Çϱâ À§ÇÏ¿© Áö¿À±×¸®µå º¸°­À¯¹«, ¸»¶Ò°£°Ýº¯È­¿¡ µû¸¥ ÇöÀå¸ðÇü½ÇÇè°ú 2Â÷¿ø ¼öÄ¡ÇØ¼®À» ¼öÇàÇÏ¿´´Ù. ¼öÄ¡ÇØ¼®Àû ¿¬±¸´Â ¹ü¿ë À¯ÇÑÂ÷ºÐÇØ¼® ÇÁ·Î±×·¥ÀÎ FLAC 2-D¸¦ »ç¿ëÇÏ¿´À¸¸ç, Áö¹Ý-¸»¶Ò-Áö¿À±×¸®µåÀÇ ÇÏÁßÀü´Þ ¸ÞÄ«´ÏÁò¿¡ ´ëÇÏ¸ç ºÐ¼®ÇÏ¿´´Ù. Áö¿À±×¸®µå·Î º¸°­µÈ ¼ºÅäÁöÁö¸»¶ÒÀÇ ÇÏÁßÀü´ÞÀº ¼ºÅäÁ¦Ã¼ ³»ÀÇ ¾ÆÄªÈ¿°ú, Áö¿À±×¸®µåÀÇ ÀÎÀå, ¸»¶ÒÀ¸·ÎÀÇ ÀÀ·ÂÀüÀÌ µîÀÇ °úÁ¤ÀÌ º¹ÇÕÀûÀ¸·Î ¹ß»ýÇÑ´Ù. ÇöÀå¸ðÇü½ÇÇè ¹× ¼öÄ¡ÇØ¼®¿¬±¸ °á°ú¿¡ µû¸£¸é Áö¿À±×¸®µåÀÇ º¸°­¿¡ µû¶ó ¾ÆÄªÈ¿°ú´Â ¹Ì¼ÒÇÏ°Ô °¨¼ÒÇÏÁö¸¸, ºÎµîħÇÏ´Â ±Þ°ÝÈ÷ °¨¼ÒÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¶ÇÇÑ, D/b=3(D: ¸»¶Òĸ °£°Ý, b: ¸»¶ÒÁ÷°æ)À϶§ ¹«º¸°­ Áö¹Ý¿¡ ºñÇÏ¿© $40%$ÀÇ Ä§Çϰ¡ °¨¼ÒÇϸç, D/b=6ÀÌ»óÀÏ °æ¿ì´Â Áö¿À±×¸®µå¿¡ ÀÇÇÑ ÇÏÁßÀüÀ̰¡ ¹ß»ýÇÏÁö ¾Ê¾Æ º¸°­È¿°ú°¡ °ÅÀÇ ¾ø´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù.
Geosynthetic-reinforced and pile-supported embankments have been increasingly used and researched around the world. The inclusion of one or multiple geosynthetic reinforcements over the pile is intended to enhance the efficiency of load transfer from soft ground to piles, to reduce total and differential settlement and increase global or local stability. In this paper, the reinforcement effectiveness and arching effect of the geogrid-reinforced and pile-supported embankments have been studied in terms of field model tests and numerical analysis with varying the space between piles and reinforcement. 2-dimensional numerical analysis has been conducted using the FLAC (Fast Lagrangian Analysis of Continua) program. And load transfer mechanisms between soil-piles-geogrid were investigated. The mechanisms of load transfer can be considered as a combination of embankment soil arching, tension geogrid, and stress concentration due to the stiffness difference between pile and soft ground. Based on the field model test and numerical analysis results, it was found that the geosynthetic reinforcement slightly interferes with soil arching, and helps reduce differential settlement of the soft ground. Also. at the D/b=3 (D: spacing of pile cap, b: diameter of pile), the total settlement is reduced by about $40%$ compared to that without reinforcement. For $D/b{ge}6$, the effectiveness of geogrid reinforcement in reducing settlement is negligible.
 
Ű¿öµå
Arching effect;Differential settlement;Geogrid-reinforced;Numerical analysis;Pile-supported embankment;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.21, no.10, 2005³â, pp.5-16
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200509408734493)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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