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Çѱ¹Áö¹Ý°øÇÐȸ / v.26, no.7, 2010³â, pp.7-16
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ÀÀ·ÂÀÌ·ÂÀÌ »çÁúÅäÀÇ CPT-DMT »ó°ü°ü°è¿¡ ¹ÌÄ¡´Â ¿µÇâ
( Effect of Stress History on CPT-DMT Correlations in Granular Soil ) |
| À̹®ÁÖ;ÃÖ¼º±Ù;±è¹ÎÅÂ;ÀÌÁÖÇü;ÀÌ¿ìÁø; (ÁÖ)ÇÑȰǼ³;³ª¿ìÁö¿À ÄÁ¼³ÅÏÆ®;°í·Á´ëÇб³ °ÇÃà»çȸȯ°æ°øÇаú;°í·Á´ëÇб³ °ÇÃà»çȸȯ°æ°øÇаú;°í·Á´ëÇб³ °ÇÃà»çȸȯ°æ°øÇаú;
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| ÀÀ·ÂÀÌ·ÂÀº »çÁúÅä Áö¹ÝÀÇ ÀÜ·ù ¼öÆòÀÀ·ÂÀ» Áõ°¡½ÃÄÑ ÇöÀå½ÃÇèÀÇ °üÀÔÀúÇ×À» Áõ°¡½ÃŲ´Ù. º» ¿¬±¸¿¡¼´Â è¹ö¿¡ Á¶¼ºµÈ Á¤±Ô ¹× °ú¾Ð¹Ð ½Ã·á¿¡ ´ëÇÑ ÄܰüÀÔ½ÃÇè°ú µô¶óÅä¹ÌÅÍ ½ÃÇèÀ» ¼öÇàÇϰí ÀÀ·ÂÀÌ·ÂÀÌ ½ÃÇè°á°ú¿Í ÃøÁ¤°ªÀÇ »ó°ü°ü°è¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ºÐ¼®ÇÏ¿´´Ù. ½ÃÇè°á°ú, Æò±Õ À¯È¿ÀÀ·ÂÀ¸·Î Á¤±ÔÈµÈ Äܼ±´ÜÀúÇ×Àº »ó´ë¹Ðµµ ¹× »óÅÂÁ¤¼ö¿Í ³ôÀº »ó°ü¼ºÀ» º¸¿´´Ù. µô¶óÅä¹ÌÅÍÀÇ ¼öÆòÀÀ·ÂÁö¼ö($K_D$)´Â Äܼ±´ÜÀúÇ×($q_c$) »Ó¸¸ ¾Æ´Ï¶ó, µô¶óÅä¹ÌÅÍ °è¼ö($E_D$) º¸´Ùµµ ÀÀ·ÂÀÌ·Â ¿µÇâÀ» È¿°úÀûÀ¸·Î ¹Ý¿µÇÏ¿´´Ù. ¼öÆòÀÀ·ÂÁö¼ö¿¡ ¹Ý¿µµÈ ÀÀ·ÂÀÌ·ÂÀÇ ¿µÇâÀ» Á¤ÁöÅä¾Ð°è¼öÀÎ $K_0$·Î º¸Á¤ÇÑ $K_D/K_0$´Â »ó´ë¹Ðµµ »Ó¸¸ ¾Æ´Ï¶ó, »óÅÂÁ¤¼ö, Æò±Õ À¯È¿ÀÀ·ÂÀ¸·Î Á¤±ÔÈµÈ Äܼ±´ÜÀúÇ×°ú ÀÀ·ÂÀ̷¿¡ °ü°è¾ø´Â ³ôÀº »ó°ü¼ºÀ» º¸¿´´Ù. ¶ÇÇÑ Æò±Õ À¯È¿ÀÀ·ÂÀ¸·Î Á¤±ÔÈµÈ µô¶óÅä¹ÌÅÍ °è¼ö($E_D/{sigma}_m'$)¿Í »óÅÂÁ¤¼öÀÇ °ü°èµµ ÀÀ·ÂÀ̷¿¡ °ü°è¾øÀÌ À¯ÀÏÇÑ ½ÄÀ¸·Î Ç¥ÇöµÇ¾ú´Ù. |
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| Stress history increases the residual horizontal stress of granular soil and, consequently, the penetration resistance. This study analyzes the effect of stress history on the cone resistance ($q_c$), horizontal stress index ($K_D$) and dilatometer modulus ($E_D$) of CPT and DMT from calibration chamber specimen in OC as well as NC state. Test results show that the normalized cone resistance by mean effective stress correlates well with the relative density and the state parameter, whereas the normalized cone resistance by vertical effective stress is a little affected by stress history. The influence of stress history is more reflected on $K_D$ than $E_D$ and $q_c$. The $K_D/K_0$, in which the effect of stress history on $K_D$ is compensated by the at-rest coefficient of earth pressure, $K_0$, is related to relative density, state parameter and the normalized cone resistance by mean effective stress. It is also observed that the normalized dilatometer modulus by mean effective stress ($E_D/{sigma}_m'$) shows a unique correlation with the state parameter, regardless of stress history. |
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| Ű¿öµå |
| Cone resistance;Dilatometer modulus;Horizontal stress index;$K_D/K_0$;Stress history; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.26, no.7, 2010³â, pp.7-16
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201033062364972)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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