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Çѱ¹Áö¹Ý°øÇÐȸ / v.15, no.5, 1999³â, pp.29-41
¿¬¾àÇÑ Á¡ÅäÃþ À§¿¡ ³õÀÎ ¸ð·¡Áö¹ÝÀÇ ±ØÇÑÁöÁö·Â¿¡ °üÇÑ ¿¬±¸
( Bearing Capacity of Foundation on Sand Overlying Soft Clay )
¹Î´ö±â;±èÈ¿»ó; ¿ï»ê´ëÇб³ °ø°ú´ëÇÐ Åä¸ñȯ°æ°øÇкÎ;(ÁÖ)´Ù»ê ENG ±â¼ú¿¬±¸¼Ò;
 
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º» ³í¹®¿¡¼­´Â ¿¬¾àÇÑ Á¡ÅäÃþ°ú ¸ð·¡Áö¹ÝÀ¸·Î ÀÌ·ç¾îÁø 2ÃþÁö¹ÝÀÇ ÁöÁö·ÂÀ» ±¸Çϱâ À§ÇÏ¿© ºñ±³Àû °£´ÜÇÑ °­µµÁ¤¼öÆò±Õ¹ýÀ» Àû¿ëÇÏ¿´´Ù. °­µµÁ¤¼öÆò±Õ¹ýÀÇ ¿ÀÂ÷¸¦ ÁÙÀ̱â À§ÇØ, °­µµÁ¤¼öÆò±ÕÀ» ÃëÇÒ ÇѰè±íÀ̸¦ Á¤ÀÇÇÏ´Â ½ÄÀ» À¯µµÇϰí, ¼öÄ¡ÇØ¼®(FLAC)À» ÀÌ¿ëÇÏ¿© º¸Á¤ÇÏ¿´´Ù. ±×¸®°í ±× °á°ú¸¦ ¹«Â÷¿øÂ÷Æ®·Î ³ªÅ¸³»¾ú´Ù. º» ³í¹®¿¡¼­ Á¦¾ÈµÈ ¹«Â÷¿øÂ÷Æ®¸¦ ÀÌ¿ëÇÏ¿© ±¸ÇÑ 2ÃþÁö¹ÝÀÇ ÁöÁö·Â°ú Satyanarayana £¦ Grag, Sreenivasulu, Meyerhof & Hnna µîÀÌ Á¦¾ÈÇÑ ±âÁ¸ÀÇ ¿¬±¸°á°ú¿Í ºñ±³ ¹× °ËÅ並 ¼öÇàÇÏ¿´´Ù, °­µµÁ¤¼öÆò±Õ¹ýÀº ÇϺÎÁö¹ÝÀ» ´ëÇ¥ÇÒ ¼ö ÀÖ´Â ¹°¼ºÀ» ±¸Çϰí, ±âÃÊÇϺθ¦ ´ÜÃþÁö¹ÝÀ¸·Î °¡Á¤ÇÑ ÈÄ ±âÁ¸ÀÇ ÁöÁö·Â°è¼ö¸¦ »ç¿ëÇÏ°Ô µÈ´Ù. º» ³í¹®¿¡¼­ ±âÁ¸ÀÇ Á¦¾ÈµÈ ÁöÁö·Â°è¼ö Áß¿¡¼­ VesicÀÌ Á¦¾ÈÇÑ ÁöÁö·Â°è¼ö¸¦ »ç¿ëÇÏ´Â °ÍÀÌ ¼öÄ¡ÇØ¼®¿¡ ±ÙÁ¢ÇÏ¿´°í, °­µµÁ¤¼öÆò±ÕÀ» ÃëÇÒ ÇѰè±íÀ̸¦ ±âÃÊÆøÀÇ ¾à 2¹è·Î °¡Á¤ÇÑ Satyanarayana & GragÀÇ ¹æ¹ý°ú ±âÃÊ ÆÄ±«½Ã Çü¼ºµÇ´Â °­Ã¼½û±âÀÇ Å©±â$[0.5B; tan(45+phi_1/2)]$·Î °¡Á¤ÇÑ Sreenivasulu¹æ¹ýÀº °ú´ÙÇÑ ÁöÁö·ÂÀÌ »êÁ¤µÇ´Â °á°ú¸¦ º¸¿´´Ù. ±×¸®°í ±âÃÊ¿¬´Ü¿¡¼­ ¼öÁ÷¸éÀ» µû¶ó ¼öµ¿ÆÄ±« »óŰ¡ Çü¼ºµÇ´Â °ÍÀ¸·Î °¡Á¤ÇÑ Heyerhof & HannaÀÇ °á°ú¿Í º» ¿¬±¸¿¡¼­ Á¦¾ÈÇÑ ¹æ¹ýÀº ºñ±³Àû Àß ÀÏÄ¡ÇÏ¿´´Ù. µû¶ó¼­, Á¦¾ÈµÈ ¹«Â÷¿øÂ÷Æ®¸¦ ÀÌ¿ëÇÏ¿© ¿¬¾àÇÑ Á¡ÅäÃþ À§¿¡ ³õÀÎ ¸ð·¡Áö¹ÝÀÇ ÁöÁö·ÂÀ» ±Ù»çÀûÀ¸·Î ¿¹ÃøÇÒ ¼ö ÀÖ´Ù´Â °á·ÐÀ» ¾ò¾ú´Ù.
This Paper applied a simple strength parameter averaging method to double layered systems consisting of the strong sand layer overlying the soft clay deposit. This study derived a formula which defines a critical depth as the strength parameters, and used the correction parameter, $alpha$ to reduce an error of the strength parameter averaging method. The results of the method were presented in the form of dimensionless charts and were compared with the results of several solutions proposed by Satyanarayana & Grag, Sreenivasulu, and Meyerhof & Hanna. The results of the proposed method coincided with the method of Meyerhof & Hanna and the results obtained from FLAC. But the Satyanarayana & Grag method and the Sreenivasulu method overestimated the bearing capacity. Consequently, the bearing capacity of foundation on sand layer overlying soft clay layer can be approximately estimated by using the proposed dimensionless charts.
 
Ű¿öµå
Bearing capacity;Strength parameter averaging method;Equivalent shear depth;Design chart;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.15, no.5, 1999³â, pp.29-41
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199911921749502)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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