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Çѱ¹Áö¹Ý°øÇÐȸ / v.22, no.7, 2006³â, pp.23-35
±¼Âø¸é °ÅÄ¥±â¸¦ °í·ÁÇÑ ¾Ï¹Ý ±ÙÀÔ ÇöÀ埼³¸»¶ÒÀÇ ÁÖ¸é ÇÏÁßÀüÀÌÇÔ¼ö Á¦¾È
( Shear Load-Transfer Function of Rock-Socketed Drilled Shafts Considering Borehole Roughness )
¼³ÈÆÀÏ;¿ì»óÀ±;ÇѱÙÅÃ;Á¤»ó¼¶; ¿¬¼¼´ëÇб³ Åä¸ñ°øÇаú;¿¬¼¼´ëÇб³ Åä¸ñ°øÇаú;Æ÷½ºÄڰǼ³ Åä¸ñ±â¼úÆÀ;¿¬¼¼´ëÇб³ Åä¸ñ°øÇаú;
 
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º» ¿¬±¸¿¡¼­´Â ¾Ï¹Ý¿¡ ±ÙÀÔµÈ ÇöÀ埼³¸»¶ÒÀÇ ÁÖ¸éÇÏÁßÀüÀÌÆ¯¼ºÀ» ºÐ¼®Çϱâ À§ÇÏ¿©, ÁÖ¿ä ¿µÇâ¿ä¼Ò(ÀÏÃà¾ÐÃà°­µµ, °ÅÄ¥±â, ¼öÁ÷°­¼º, Ãʱⱸ¼ÓÀÀ·Â, Àç·á¼ºÁú)¿¡ µû¶ó ÀÏÁ¤¼öÁ÷°­¼º(Constant Normal Stiffness, CNS)Á¶°ÇÀÇ Á÷Á¢Àü´Ü½ÃÇèÀ» ¼öÇàÇÏ¿´´Ù. ±× °á°ú ¾Ï¹Ý¿¡ ±ÙÀÔµÈ ÇöÀ埼³¸»¶ÒÀÇ ÁÖº¯ÇÏÁßÀüÀÌÆ¯¼ºÀ» 3±¸°£À¸·Î ÀÌ»óÈ­ÇÒ ¼ö ÀÖ¾úÀ¸¸ç, °¢ ±¸°£¿¡¼­ÀÇ °Åµ¿À» Áö¹èÇÏ´Â ÁÖ¿ä ¿ä¼ÒÀÇ ¿µÇâ ¹× ±×¿¡ µû¸¥ °Åµ¿À» ÆÄ¾ÇÇÒ ¼ö ÀÖ¾ú´Ù. À̸¦ Åä´ë·Î ¾Ï¹ÝÀÇ Àý¸® ¹× dzȭ»óŸ¦ ³ªÅ¸³»´Â GSI(Geological Strength Index)¸¦ ÀÌ¿ëÇÑ Hoek-Brown ÆÄ±«±âÁØ(1997)À» Àû¿ëÇÏ¿©, ¾Ï¹Ý¿¡ ±ÙÀÔµÈ ÇöÀ埼³¸»¶ÒÀÇ ±¼Âø¸é °ÅÄ¥±â¸¦ °í·ÁÇÑ »õ·Î¿î ÁÖ¸é ÇÏÁßÀüÀÌÇÔ¼ö¸¦ Á¦¾ÈÇÏ¿´´Ù. Á¦¾ÈµÈ ÇÏÁßÀüÀÌÇÔ¼ö´Â ±âÁ¸ 7º»ÀÇ ¸»¶Ò ÀçÇϽÃÇè °á°ú¿Í ºñ±³ºÐ¼®À» ¼öÇàÇÏ¿´À¸¸ç, ±× °á°ú º» Á¦¾È½ÄÀÌ ¾Ï¹Ý ±¼Âø¸éÀÇ °ÅÄ¥±â ¹× ¾Ï¹ÝƯ¼ºÀ» ÀûÀýÈ÷ ¹Ý¿µÇÔÀ» ¾Ë ¼ö ÀÖ¾ú´Ù.
Shear load transfer characteristics of rock-socketed drilled shafts were analyzed. The constant normal stiffness (CNS) direct shear tests were performed to identify the major influencing factors of shaft resistance, i.e., unconfined compressive strength, borehole roughness, normal stiffness, initial confining stress, and material properties. Based on the CNS tests, shear load transfer function of drilled shafts in rocks is proposed using borehole roughness and the geological strength index (GSI), which indicates discontinuity and surface condition of rock mass in Hoek-Brown criterion (1997). The proposed load-transfer function was verified by the load test results of seven rock-socketed drilled test shafts subjected to axial loads. Through comparisons of the results of load tests, it is found that the load-transfer function by the present study is in good agreement with the general trend observed by in situ measurements, and thus represents a significant improvement in the prediction of load transfer of drilled shafts.
 
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Borehole roughness;Constant normal stiffness;Drilled shaft;GSI;Hoek-Brown criterion;Rock-socket;Shear load transfer function;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.22, no.7, 2006³â, pp.23-35
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200634515068035)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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