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Çѱ¹Áö¹Ý°øÇÐȸ / v.24, no.11, 2008³â, pp.133-141
À¯È¿Äܰè¼ö¸¦ ÀÌ¿ëÇÑ Æ÷È­Á¡ÅäÀÇ ºñ¹è¼öÀü´Ü°­µµ Æò°¡
( Estimation of Undrained Shear Strength for Clays Using Effective Cone Factor )
±è⵿;±è¼öÀÏ;ÀÌÁØÈ¯; (ÁÖ)ÀÌÁ¦ÀÌÅØ ¿£Áö´Ï¾î¸µ »ç¾÷º»ºÎ;¿¬¼¼´ëÇб³ Åä¸ñ°øÇаú;¿¬¼¼´ëÇб³ Åä¸ñ°øÇаú;
 
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º» ¿¬±¸´Â ÇÇ¿¡Á¶ÄܰüÀÔ½ÃÇè(CPTu) °á°ú¸¦ ÀÌ¿ëÇÑ Á¡ÅäÀÇ ºñ¹è¼öÀü´Ü°­µµ Æò°¡¿¡ °üÇÑ °ÍÀ¸·Î¼­, CPTu ½ÃÇè°á°ú·ÎºÎÅÍ ¹ß»ýÇÒ ¼ö ÀÖ´Â ºÒÈ®½Ç¼ºÀ» ÃÖ¼ÒÈ­ÇÏ°í º¸´Ù °æÁ¦ÀûÀ̸ç È¿°úÀûÀÎ ºñ ¹è¼öÀü´Ü°­µµ Æò°¡¹ý °³¹ßÀ» ¸ñÀûÀ¸·Î ÇÑ´Ù. À̸¦ À§ÇÏ¿© ±¹³» ³²ÇØ¾È Áö¿ªÀÇ ÇØ¼º Á¡ÅäÁö¹ÝÀ» ´ë»óÀ¸·Î ÇÏ¿©, ´Ù¾çÇÑ ÇöÀå ¹× ½Ç³»½ÃÇèÀ» ¼öÇàÇÏ¿´´Ù. Á¦¾ÈµÈ ¹æ¹ý¿¡¼­´Â ±âÁ¸ ¹æ¹ý¿¡ Æ÷ÇԵǾî ÀÖ´Â »óÀç¾Ð(${sigma}_{v0}$)ÀÇ º¸Á¤ÀýÂ÷°¡ ¿ä±¸µÇÁö ¾ÊÀ¸¸ç, CPTu °á°úÀÎ ÄÜÁöÁö·Â($q_t$)°ú ÃʱⰣ±Ø¼ö¾Ð($u_i$)ÀÇ ÃøÁ¤¸¸À¸·Î ºñ¹è¼öÀü´Ü°­µµÀÇ ÃßÁ¤ÀÌ °¡´ÉÇϵµ·Ï ÇÏ¿©, Á¶»ç°úÁ¤¿¡¼­ÀÇ Ãß°¡ºñ¿ëÀ̳ª ½Ã°£¼Ò¸ð¸¦ ÃÖ¼ÒÈ­Çϵµ·Ï ÇÏ¿´´Ù. Á¦¾ÈµÈ ¹æ¹ýÀÇ Àû¿Â¼º Æò°¡¸¦ À§ÇÏ¿© ±¹³»ÀÇ ´Ù¾çÇÑ ÅäÁúƯ¼ºÀ» ³ªÅ¸³»´Â 4°³ Áö¿ª¿¡¼­ ¼öÇàµÈ ÇÇ¿¡Á¶ÄܰüÀÔ½ÃÇè °á°ú¸¦ ¼öÁýÇÏ¿´À¸¸ç, À̸¦ Åä´ë·Î Á¦¾ÈµÈ ¹æ¹ý¿¡ ÀÇÇÑ °á°ú¿Í ½ÇÃøµÈ °á°ú¿ÍÀÇ ºñ±³ºÐ¼®À» ½Ç½ÃÇÏ¿´´Ù. ºÐ¼®°á°ú, ¿¹ÃøµÈ °á°ú´Â ÃøÁ¤µÈ °á°ú¿Í À¯»çÇÔÀ» È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù.
In this study, a new method for estimating the undrained shear strength $s_u$ of saturated clays using piezocone penetration test (CPTu) result is proposed. This is to develop more effective CPTu-based $s_u$ estimation method at lower cost with less uncertainty. For this purpose, a marine clay deposit is selected and tested through extensive experimental testing program including both in-situ and fundamental laboratory tests. The proposed method is based on a correlation between the undrained shear strength $s_u$ and the cone resistance $q_t$, without introduction of the total overburden stress into the $s_u-q_t$ correlation. As a result, no additional testing procedure for collecting undisturbed soils samples is required, which can reduce overall testing cost. To verify the proposed method, 4 test sites, which consist of a variety of soil conditions, are selected and used for comparison between measured and predicted undrained shear strength. From comparison, it is seen that predicted values of $s_u$ using the proposed method match well those from measured results.
 
Ű¿öµå
Cone factor;Cone penetration test;Site investigation;Undrained shear strength;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.24, no.11, 2008³â, pp.133-141
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200806135608632)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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