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Çѱ¹Áö¹Ý°øÇÐȸ / v.17, no.6, 2001³â, pp.15-24
±¹³» Á¡¼ºÅä Áö¹ÝÀÇ ÇÇ¿¡Á¶ÄÜ °è¼ö
( Piezocone Factors of Korean Clayey Soils )
ÀåÀμº;À̼±Àç;Á¤Ãæ±â;±è¸í¸ð; Çѱ¹Çؾ翬±¸¼Ò ¿¬¾ÈÇ׸¸°øÇבּ¸º»ºÎ;µ¿ºÎ¿£Áö´Ï¾î¸µ(ÁÖ) ±â¼ú¿¬±¸¼Ò;¼­¿ï´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;¼­¿ï´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;
 
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ÇÇ¿¡Á¶ÄÜ °üÀÔ½ÃÇè(Piezocone Penetration Test, CPTu)À¸·ÎºÎÅÍ Á¡¼ºÅäÀÇ ºñ¹è¼ö Àü´Ü°­µµ¸¦ »êÁ¤Çϱâ À§Çؼ­´Â ÇÇ¿¡Á¶ÄÜ °è¼ö°¡ ÇÊ¿äÇÏ´Ù. ÇÇ¿¡Á¶ÄÜ °è¼ö´Â °æÇèÀû ¹æ¹ý(±âÁØ ½ÃÇè ¹æ¹ý¿¡ ÀÇÇÑ ºñ¹è¼ö Àü´Ü°­µµ¿Í ÇÇ¿¡Á¶ÄÜ ½ÃÇè °á°ú¿ÍÀÇ Á÷Á¢ ºñ±³¿¡ ÀÇÇÏ¿© °áÁ¤)¿¡ ÀÇÇØ °áÁ¤µÈ °ªµéÀÌ ÀϹÝÀûÀ¸·Î »ç¿ëµÈ´Ù. ±×·¯³ª, °æÇèÀûÀÎ ÇÇ¿¡Á¶ÄÜ °è¼ö¿Í °ü·ÃÇÑ ±âÁ¸ÀÇ ¿¬±¸µéÀº °ÅÀÇ ´ëºÎºÐ ƯÁ¤ Áö¿ª¿¡ ´ëÇÑ °ªÀÏ »Ó ¾Æ´Ï¶ó Áö¹ÝÀÇ °øÇÐÀû Ư¼ºÀ̳ª Áö¹ÝÀÇ ºÒ±ÕÁú¼º µî°úÀÇ »ó°ü°ü°è ºÐ¼®ÀÌ ¾ÆÁ÷±îÁö ¹ÌÈíÇϱ⠶§¹®¿¡ ±¹³» Áö¹Ý¿¡ ±×´ë·Î Àû¿ëÇϱ⿡´Â ¹«¸®°¡ µû¸¦ ¼ö ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â 10°³ Áö ¿ª ÃÑ 46ȸÀÇ ÇÇ¿¡Á¶ÄÜ °üÀÔ½ÃÇè °á°ú¸¦ ÇöÀ庣ÀνÃÇè ¹× ½Ç³»»ïÃà½ÃÇèÀ¸·ÎºÎÅÍ ±¸ÇÑ ºñ¹è¼ö Àü´Ü°­µµ¿Í ºñ±³ÇÏ¿© ±¹³» Á¡¼ºÅä Áö¹ÝÀÇ °æÇèÀûÀÎ ÇÇ¿¡Á¶ÄÜ °è¼ö¸¦ »êÁ¤ÇÏ¿´´Ù. ±âÁ¸ Á¦½Ã °ªµé°ú ºñ±³ÇÔ°ú ¾Æ¿ï·¯ ±× ½Å·Ú¼ºÀ» ºÐ¼®Çϰí, ¼Ò¼ºÁö¼ö¿Í °ú¾Ð¹Ðºñ¿ÍÀÇ »ó°ü¼º ¹× ±âÁØ Àü´Ü½ÃÇè ¹æ¹ý¿¡ µû¸¥ ¿µÇâ¿¡ ´ëÇÏ¿© ¿¬±¸ÇÏ¿´´Ù. ¿¬±¸ °á°ú, ´Ù¾çÇÑ Áö¹Ý Á¶°Ç¿¡ ´ëÇÏ¿© ¾ò¾îÁø ÇÇ¿¡Á¶ÄÜ °è¼ö´Â Æò±Õ°ªÀ» ±×´ë·Î Àû¿ëÇϱ⿡´Â °ªÀÇ ºÐÆ÷ ¹üÀ§°¡ ³Ê¹« ³ÐÀº °ÍÀ¸·Î ³ªÅ¸³µ´Ù. µû¶ó¼­ ÇÇ¿¡Á¶ÄÜ °è¼ö¿Í ¹ÐÁ¢ÇÑ °ü·ÃÀÌ ÀÖ´Â °ÍÀ¸·Î ³ªÅ¸³­ °ú¾Ð¹Ðºñ¿¡ µû¶ó ±¸ºÐÇÏ¿© ÇÇ¿¡Á¶ÄÜ °è¼ö¸¦ Àû¿ëÇÏ´Â °ÍÀÌ ÇÕ¸®ÀûÀ̸ç, ÀÌ ¶§ ÇÊ¿äÇÑ ÇÇ¿¡Á¶ÄÜ °è¼ö¸¦ Á¦¾ÈÇÏ¿´´Ù.
In order to evaluate undrained shear strength of clayey soils using Piezocone Penetration Test (CPTu), piezoncone factor is utilized. Commonly, piezoncone factors determined by empirical basis were preferred, which were established by correlation between measurements of piezocone test and undrained strengths obtained from other shearing tests. However, previous studies on the empirical piezocone factors were site-specific and there have been no systematic investigations on the effect of both engineering characteristics of clayey soils and soil non-homogeneity on the piezocone factor. Accordingly, the direct application of the previous results to Korean clayey soils without verification may be inappropriate. In this study, empirical piezocone factors are evaluated by comparing 46 CPTu results of 10 test sites with undrained shear strength obtained from Field Vane Test (FVT) and laboratory triaxial tests. Their reliabilities are investigated by the comparison with the previous piezocone factors and the deviation of data distribution from the mean values. And the effects of referencing test methods and typical engineering characteristics of clayey soils such as overconsolidation ratio (OCR) and plastic Index (I$_{p}$) are examined. Because piezocone factors obtained for various soil conditions are widely distributed, it is not appropriate to use the mean value as a representative. Instead, it is recommended to apply the piezocone factors with OCR, which is found to be a major factor in deriving piezocone factor. The necessitated piezocone factors are presented.d.
 
Ű¿öµå
Overconsolidation ratio;Piezocone factor;Piezocone penetration test(CPTu);Plastic index;Undrained shear strength;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.17, no.6, 2001³â, pp.15-24
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200111920879434)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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