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Çѱ¹Áö¹Ý°øÇÐȸ / v.17, no.6, 2001³â, pp.37-46
¿¬Á÷ÇÏÁßÀ» ¹Þ´Â ¼Ò±Ô¸ð ¹«¸®¸»¶ÒÀÇ °Åµ¿
( Behavior of Small-Scale Pile Group Under Vertical Loading )
ÀÌ¿µ³²;À̽ÂÇö;¹Ú¿µÈ£; Çö´ë°Ç¼³ ±â¼ú¿¬±¸¼Ò;¼±¹®´ëÇб³ Åä¸ñ°øÇаú;Çö´ë°Ç¼³ ±â¼ú¿¬±¸¼Ò;
 
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¹«¸®¸»¶ÒÀÇ ÇÏÁßÁöÁö´É·Â¿¡¼­ ¸»¶ÒĸÀÌ ºÎ´ãÇÏ´Â ºñÀ²À» ÆÄ¾ÇÇÏ°í ¹«¸®¸»¶ÒÀ» ±¸¼ºÇÏ´Â °³°³ ¸»¶ÒÀÇ ÇÏÁßÀüÀÌ Æ¯¼ºÀ» ¾Ë¾Æº¸°íÀÚ ÀçÇϽÃÇèÀ» ¼öÇàÇÏ¿´´Ù. Á÷°æ 92.5mmÀÇ °­°ü¸»¶Ò 24º»(4°³¾¿ 6¿­)À» ÁöÇ¥ ¾Æ·¡ 3m ±íÀ̱îÁö ±ÙÀÔ ½ÃÄÀ dzȭ¾Ï »ó´Ü¿¡ ¸»¶Ò¼±´ÜÀÌ À§Ä¡Çϵµ·Ï ÇÏ¿´´Ù. ÃÖ´ëÇÏÁß 320tÀ» ÁöÇ¥¸é¿¡ Á¢Ã˵Ǿî ÀÖ´Â $1.5 imes2.3m$ Å©±âÀÇ ¸»¶Òĸ¿¡ ÀçÇÏÇÏ¿´´Ù. ÃÖ´ë ½ÃÇèÇÏÁßÀÎ 320t¿¡¼­´Â ¸»¶ÒĸÀÌ ÀüüÇÏÁßÀÇ ¾à 22%¿¡ ÇØ´çÇÏ´Â ÇÏÁßÀ» ºÐ´ãÇÏ¿´´Ù. ¹«¸® ¸»¶Ò ÀçÇϽÃÇè½Ã ¸»¶ÒÀÇ Æò±Õ ±ØÇÑÁöÁö·ÂÀº 16.4tÀ̸ç, ÀÌ °ªÀº ¸»¶ÒĸÀ» Ÿ¼³Çϱâ Àü¿¡ ¹«¸®¸»¶ÒÀÇ ¸ð¼­¸®¿¡ À§Ä¡ÇÑ ¸»¶Ò¿¡ ´ëÇÏ¿© ¼öÇàÇÑ ´Ü¸»ÂÊ ÀçÇϽÃÇèÀ¸·ÎºÎÅÍ ±¸ÇÑ ±ØÇÑÁöÁö·Âº¸´Ù »ó´çÈ÷ Å©°Ô ³ªÅ¸³µ´Ù. º¯À§ÀåÁßø È¿°ú·Î ÀÎÇÏ¿© ¹«¸®¸»¶Ò Áß¾Ó¿¡ À§Ä¡ÇÑ ¸»¶ÒÀº ÀÛÀº ÇÏÁßÀÌ ÀÛ¿ëÇÏ¿©µµ ¿Ü°ûºÎÀÇ ¸»¶Ò°ú °°Àº ħÇÏ·®À» ±â·ÏÇÑ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¹«¸®¸»¶Ò¿¡¼­´Â Áָ鸶Âû·ÂÀÇ ºÐ´ãÀ²ÀÌ Àü ÇÏÁߴܰ迡¼­ ¾à 60%·Î ÀÏÁ¤Çϳª ´Ü¸»¶Ò ½ÃÇè¿¡¼­´Â ÇÏÁßÀÌ Áõ°¡ÇÔ¿¡ µû¶ó Áָ鸶Âû·ÂÀÇ ºÐ´ãÀ²ÀÌ 82%¿¡¼­ 65%·Î °¨¼ÒÇÏ¿´´Ù.
Pile load tests were carried out to investigate the contribution of the pile cap to the carrying capacity of a pile group and load transfer characteristics of piles in the group. A group of 24 piles$(4 imes6 array)$ of 92.5mm diameter steel pipe were installed to the depth of 3m fron the ground surface, the top of weathered rock. A maximum load of 320ton was applied to the pile cap, $1.5 imes2.3m$, in contact with the ground surface. At the maximum load of 320ton, the pile cap has carried 22% of the total load. Average ultimate capacity of pile in the pile group was estimated to be 16.4ton, substantially higher than that of single pile, installed at the corner and tested before pile cap construction. For the same magnitude of settlement, the pile in the center carried less load than the pile at the perimeter due to strain superposition effect. Piles in the group showed almost constant contribution(approx. 60%) of side friction to the total capacity for all of the loading stages, while that of single pile decreased from 82% to 65%.
 
Ű¿öµå
Pile cap;Pile group;Pile load test;Single pile;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.17, no.6, 2001³â, pp.37-46
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200111920879470)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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