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Çѱ¹Áö¹Ý°øÇÐȸ / v.16, no.1, 2000³â, pp.117-129
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»çÁúÅä Áö¹Ý¿¡¼ ±º¸»¶ÒÀÇ ¼öÆò°Åµ¿¿¡ °üÇÑ ¿¬±¸
( Lateral Behavior of Group Pile in Sand ) |
| ±è¿µ¼ö;±èº´Å¹; °æºÏ´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;°æºÏ´ëÇб³ ´ëÇпø Åä¸ñ°øÇаú;
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| º» ³í¹®Àº ±ÕÁú ¹× ºñ±ÕÁú Áö¹Ý¿¡¼ÀÇ ±º¸»¶Ò¼öÆò°Åµ¿¿¡ °üÇÏ¿© °íÂûÇÏ¿´´Ù. º» ¿¬±¸´Â ±º¸»¶Ò¼öÆò°Åµ¿¿¡ ´ëÇÑ ¸»¶ÒÁ߽ɰ£°Ý, ¸»¶Ò ¹è¿, ¸»¶Ò Á᫐ °£°Ýºñ, ¸»¶Ò ¼±´Ü ±¸¼ÓÁ¶°Ç, Æí½ÉÇÏÁß ±×¸®°í Áö¹ÝÁ¶°ÇÀÇ ¿µÇâµé¿¡ °üÇÏ¿© ½ÇÇèÀûÀÎ ¿¬±¸¸¦ ¼öÇàÇÏ¿´´Ù. ÁÖµ¿¸»¶Ò¿¡¼ÀÇ ±º¸»¶Ò È¿À²°ú ¼öÆòº¯À§´Â ¸»¶ÒÁ߽ɰ£°Ý°ú ¸»¶Ò¼ö¿¡ »ó´çÈ÷ ÀÇÁ¸ÇÔÀ» ¾Ë ¼ö ÀÖ´Ù. ¸»¶ÒÁ߽ɰ£°ÝÀÌ 6DÀ̰í $3 imes3$¹è¿ ¸»¶ÒÀÎ °æ¿ì, ¼±´Ü°íÁ¤¸»¶ÒÀÇ ¼öÆò ÁöÁö·ÂÀº ¼±´ÜÀÚÀ¯¸»¶ÒÀÇ °æ¿ìº¸´Ù 40-100%Å©°Ô ³ªÅ¸³µ´Ù. ¸ðÇü½ÇÇèÀÇ °á°úµé¿¡ ±Ù°ÅÇÏ¿©, ±º¸»¶ÒÀÇ °³°³ ¸»¶ÒÀÌ ´ÜÀϸ»¶Ò°ú µ¿ÀÏÇÏ°Ô °Åµ¿ÇÏ´Â ¸»¶Ò Á߽ɰ£°ÝÀº »ó´ë¹Ðµµ 61.8%¿Í 32.8%ÀÇ °æ¿ì 6D ·Î ³ªÅ¸³µÀ¸³ª, »ó´ë¹Ðµµ 90%ÀÇ Á¶¹ÐÇÑ Áö¹Ý¿¡¼´Â 8D °£°ÝÀ¸·Î ÃßÁ¤ÇÒ ¼ö ÀÖ´Ù. º» ¿¬±¸¿¡¼´Â ±º¸»¶Ò È¿À²¿¡ ´ëÇÏ¿© ¸»¶Ò Á߽ɰ£°Ý, ¸»¶Ò ¼ö, ±×¸®°í Áö¹Ý»ó´ë¹ÐµµÀÇ º¯¼ö·Î Ç¥ÇöµÇ´Â ½ÇÇè½ÄÀ» Á¦¾ÈÇÏ¿´´Ù. 3$ imes$3 ¹è¿ÀÇ ±º¸»¶Ò¿¡¼ ¾ÕÇà(lead row) ¸»¶ÒÀÇ ÇÏÁß ºÐ´ãÀ²Àº ¸»¶Ò Á߽ɰ£°Ý 3DÀÎ °æ¿ì¿¡ 41.6%-52.4% Á¤µµ ±×¸®°í 6DÀÎ °æ¿ì¿¡ 34%-40%Á¤µµ·Î ³ªÅ¸³µ´Ù. ±º¸»¶Ò¿¡¼ Áßøȿ°ú(shadowing effect)´Â ÇÏÁß Á÷°¢¹æÇ⺸´Ù´Â ÇÏÁß ÀçÇϹæÇâ¿¡¼ ´õ Å©°Ô ¹ß»ýÇÏ¿´´Ù. |
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| This paper discusses the lateral behavior of group pile in homogeneous and non- homogeneous (two layered) soil. In the group pile, the model tests were to investigate the effects on spacing-to-diameter ratio of pile, pile array, ratio of pile spacing, constraint condition of pile tip, eccentric load and ground condition. The group efficiency and lateral deflection induced in active piles were found to be highly dependent on the spacing-to-diameter ratio of pile, number of pile. Lateral bearing capacities in the group piles of fixed tip, in the case of 6D spacing and $3 imes3$ array, were 40-100% higher than those in the group pile of free tip. Based on the results obtained, a spacing-to-diameter of 6.0 seems to be large enough to eliminate the group effect for the case of relative density of 61.8% and 32.8%, and then each pile in such a case behaves essentially the same as a single pile. However, in the case of dense sand, it can be estimated that a spacing-to-diameter of 8.0 seems to be large enough to eliminate the group effect. In this study the group efficiency is illustrated in experimental function with spacing-to-diameter, S/D, relative density and number of pile. The distribution of shear force in lead row piles, in the case of 3$ imes$3 array group pile, was 41.6-52.4% for 3D spacing and 34-40% for 6D spacing, respectively. The shadowing effect for the parallel direction of lateral loading appears to be more significant than the one for the perpendicular direction of lateral loading. |
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| Ű¿öµå |
| Group pile;Non-homogeneous;Shadowing effect;Group efficiency;Distribution of shear force;Model test; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.16, no.1, 2000³â, pp.117-129
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200011921750094)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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