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Çѱ¹Áö¹Ý°øÇÐȸ / v.24, no.12, 2008³â, pp.93-101
¿¬¾àÁö¹Ý¿¡ ½Ã°øµÇ´Â Áö¿À±×¸®µå °¨½Ó ½ºÅæÄ÷³ÀÇ ÇÏÁß ÁöÁö ¸ÞÄ«´ÏÁò¿¡ °üÇÑ ¿¬±¸
( Investigation on Support Mechanism of Geogrid-Encased Stone Columns in Soft Ground )
À¯Ãæ½Ä;±è¼±ºó; ¼º±Õ°ü´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;¼º±Õ°ü´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;
 
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º» ³í¹®¿¡¼­´Â ¿¬¾àÁö¹Ý ¼ºÅä½Ã Áö¹Ýº¸°­ °ø¹ýÀ¸·Î Àû¿ëµÇ´Â Áö¿À±×¸®µå °¨½Ó ½ºÅæÄ÷³°ø¹ýÀÇ ÇÏÁßÁöÁö ¸ÞÄ«´ÏÁò¿¡ ´ëÇÑ ³»¿ëÀ» ´Ù·ç¾ú´Ù. À̸¦ À§ÇØ ¿¬¾àÁö¹Ý ¼ºÅä ½Ã°ø°úÁ¤°ú Áö¿À±×¸®µå °¨½Ó ½ºÅæÄ÷³ÀÇ ¹è¼ö ¹× º¸°­ È¿°ú¸¦ Çö½ÇÀûÀ¸·Î ¸ð»çÇÒ ¼ö ÀÖ´Â 3Â÷¿ø ÀÀ·Â-°£±Ø¼ö¾Ð ¼öÄ¡ÇØ¼® ¸ðµ¨À» ÀÌ¿ëÇÏ¿© ´Ù¾çÇÑ ½Ã°øÁ¶°Ç¿¡ ´ëÇÑ ÇØ¼®À» ¼öÇàÇÏ°í ±× °á°ú¸¦ ºÐ¼®ÇÏ¿´´Ù. ±× °á°ú, ÀÓÀÇ ½Ã°øÁ¶°Ç¿¡ ÀÖ¾î Áö¿À±×¸®µå °¨½ÓÀ¸·Î ¹ßÇöµÇ´Â ±¸¼ÓÈ¿°ú·Î ÀÎÇØ ½ºÅæÄ÷³ÀÇ °­¼ºÀÌ Áõ°¡µÇ¾î »óºÎ ¼ºÅäÇÏÁßÀÇ ÁÖº¯ ¿¬¾àÁö¹ÝÀ¸·ÎÀÇ ÇÏÁߺдãÀ²À» °¨¼Ò½ÃŰ°í µû¶ó¼­ °úÀ×°£±Ø¼ö¾Ð ¹× ÀÌ¿¡ µû¸¥ ħÇÏ·®ÀÌ °¨¼ÒµÇ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ÀÌ·¯ÇÑ È¿°ú´Â Áö¿À±×¸®µå °¨½Ó±æÀÌ ¹× °­¼º µî º¸°­Á¶°Ç¿¡ Á¿ìµÇ´Â °ÍÀ¸·Î ³ªÅ¸³µÀ¸¸ç ÀÓÀÇ ½Ã°øÁ¶°Ç¿¡ ÀÖ¾î º¸°­È¿°ú¸¦ ÃÖ´ë·Î È®º¸ÇÒ ¼ö ÀÖ´Â ÀÓ°è°¨½Ó±æÀÌ¿Í ÀÓ°è°­¼ºÀÌ Á¸ÀçÇÏ´Â °ÍÀ¸·Î ºÐ¼®µÇ¾ú´Ù.
This paper presents the results of numerical investigation on support mechanism of geogrid-encased stone columns for use in soft ground improvement. A number of cases were analyzed using a 3D stress-pore pressure coupled model that can effectively model construction sequence and drainage as well as reinforcing effects of geogrid-encased stone columns. The results indicated that the geogrid encasement provides additional confinement effect that reduces vertical stress in the soft ground, thus resulting in less excess pore water pressures and associated settlement. Also revealed was that such a confinement effect depends on encasement length and stiffness of geogrid. It is also shown that there exist critical encasement length and stiffness of geogrid for a given condition.
 
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Finite element method;Geogrid;Soft ground;Stone column;Stress-pore pressure coupled analysis;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.24, no.12, 2008³â, pp.93-101
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200806942466065)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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