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Çѱ¹Áö¹Ý°øÇÐȸ / v.26, no.4, 2010³â, pp.27-36
µô¶óÅä¹ÌÅÍ ½ÃÇèÀ» ÀÌ¿ëÇÑ »çÁúÅäÀÇ »óÅÂÁ¤¼ö Æò°¡
( Evaluation of State Parameter of Sands Using Dilatometer Test )
ÃÖ¼º±Ù;À̹®ÁÖ;È«¼ºÁø;ÀÌ¿ìÁø; (ÁÖ)³ª¿ìÁö¿ÀÄÁ¼³ÅÏÆ®;°í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇкÎ;°í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇкÎ;°í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇкÎ;
 
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»çÁúÅäÀÇ »óÅÂÁ¤¼ö¸¦ ÇöÀå½ÃÇèÀ¸·ÎºÎÅÍ ÃßÁ¤Çϱâ À§ÇØ ½Ç³» è¹ö¿¡ Á¶¼ºµÈ ºÎ»ê»ç¿¡ ´ëÇØ µô¶óÅä¹ÌÅÍ ½ÃÇèÀ» ¼öÇàÇÏ¿´´Ù. ½ÃÇè°á°ú, ¼öÆòÁõÆø°è¼ö($K_D/K_0$)¿Í »óÅÂÁ¤¼ö($Psi$)ÀÇ °ü°è´Â ¹Ý´ë¼öÃà»ó¿¡¼­ ¼±Çü°ü°è¸¦ º¸¿´À¸³ª, ÀÀ·ÂÀ̷¿¡ ÀÇÇÑ ÀÜ·ù¼öÆòÀÀ·ÂÀÇ ¿µÇâÀ¸·Î °ú¾Ð¹Ð ½Ã·á°¡ Á¤±Ô¾Ð¹Ð ½Ã·á¿¡ ºñÇÏ¿© µ¿ÀÏÇÑ »óÅÂÁ¤¼ö¿¡¼­ ¼öÆòÁõÆø°è¼öÀÇ °ªÀÌ ÀÛ°Ô Æò°¡µÇ¾ú´Ù. À¯È¿ÀÀ·ÂÀ¸·Î Á¤±ÔÈ­µÈ µô¶óÅä¹ÌÅÍ °è¼ö($E_D/sigma_m'$)¿Í »óÅÂÁ¤¼öÀÇ °ü°è´Â ¹Ý´ë¼öÃà»ó¿¡¼­ ¼±Çü°ü°è¸¦ ¸¸Á·ÇÏ¿´À¸¸ç, ´Ù¼ÒÀÇ ºÐ»êÀº ÀÖÀ¸³ª ÀÀ·ÂÀ̷¿¡ °ü°è¾øÀÌ ÇϳªÀÇ °ü°è½ÄÀ¸·Î Ç¥Çö ±â´ÉÇÏ¿´´Ù. ´Ù¸¸ ÀÀ·Â¼öÁØÀÇ ¿µÇâÀ¸·Î °ú¾Ð¹Ð »óź¸´Ù Á¤±Ô¾Ð¹Ð »óÅÂÀÇ ºÐ»êÀÌ ¾à°£ Å©°Ô ¹ß»ýµÇ¾úÀ¸¸ç ±¸¼Ó¾ÐÀÌ Áõ°¡ÇÒ¼ö·Ï °ü°è°î¼±ÀÌ ÇÏÇâ À̵¿ÇÏ´Â °æÇâÀÌ ³ªÅ¸³µ´Ù. ±âÁ¸¿¡ ¿¬±¸µÈ Ticino sand ¹× Toyoura sand¿Í ºñ±³ÇÑ °á°ú, $K_D/K_0-Psi$ °ü°è´Â È¥ÀçµÇ¾î ºÐÆ÷ÇÏ¿´À¸³ª, $E_D/sigma_m'-Psi$ °ü°è´Â ½Ã·á ¾ÐÃ༺ÀÇ ¿µÇâÀ¸·Î Toyoura sand°¡ Ticino snad ¹× ºÎ»ê»çÀÇ »óºÎ¿¡ À§Ä¡ÇÏ¿´´Ù.
In this study, a series of flat dilatometer tests are performed for Busan sand reconstituted in a large calibration chamber to evaluate the state parameter ($Psi$). Experimental result shows that the horizontal amplification factor ($K_D/K_0$) is linearly related with state parameter in semi-logarithmic space, but the $K_D/K_0$ of OC specimen is smaller than that of NC specimen because of the horizontal residual stress by stress history of OC specimen. The relation between the normalized dilatometer modulus ($E_D/sigma_m'$) and the state parameter is also linearly expressed in semi-logarithmic space, and the effect of stress history is relatively insignificant in this relation. However, the variation in $E_D/sigma_m'-Psi$ relation of NC state is slightly higher than that of OC state due to the effect of the stress level, and the correlation curve is descending with increase of confining stress. The comparison of test result with previous results of Ticino and Toyoura sands shows that the $E_D/sigma_m'-Psi$ relation of Toyoura sand is located on upper side than that of Busan and Tieino sands due to the effect of the higher compressibility, whereas the $K_D/K_0-Psi$ relation of each sand is irregularly distributed.
 
Ű¿öµå
Busan sand;Dilatometer modulus;Dilatometer tests;Horizontal stress index;State parameter;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.26, no.4, 2010³â, pp.27-36
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201021452660539)
¾ð¾î : Çѱ¹¾î
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