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Çѱ¹Áö¹Ý°øÇÐȸ / v.23, no.7, 2007³â, pp.87-98
DMT¸¦ ÀÌ¿ëÇÑ ºÎ»ê½ÅÇ× Á¡ÅäÀÇ ºñ¹è¼ö Àü´Ü°­µµ ÃßÁ¤
( Evaluation of Undrained Shear Strength of Busan New-port Clay by DMT )
È«¼ºÁø;½Åµ¿Çö;±èµ¿ÈÖ;Á¤»óÁø;ÀÌ¿ìÁø; °í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇаú;°í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇаú;°í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇаú;»ï¼º¹°»ê °Ç¼³ºÎ¹® ºÏÄÁ 2-1´Ü°è ÃàÁ¶ ÇöÀå;°í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇаú;
 
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º» ¿¬±¸¿¡¼­´Â DMT¸¦ ÀÌ¿ëÇÑ ºñ¹è¼ö Àü´Ü°­µµ¸¦ ÆÄ¾ÇÇϱâ À§ÇÏ¿© ºÎ»ê½ÅÇ× Á¡ÅäÃþ¿¡ DMT ½ÃÇè, º£ÀÎÀü´Ü½ÃÇè, $CK_0U$ »ïÃà¾ÐÃà½ÃÇèÀ» ½Ç½ÃÇÏ¿´´Ù. ½ÃÇè°á°ú Á¤±ÔÈ­ÇÑ ºñ¹è¼ö Àü´Ü°­µµºñ´Â »ïÃà½ÃÇèÀÇ °æ¿ì $S_{u(CKU)}/{sigma}'_v=0.30{sim}0.35$, º£ÀÎÀü´Ü½ÃÇèÀÇ °æ¿ì ${mu}S_{u(VST)}/{sigma}'_v=0.20{sim}0.22$·Î ³ªÅ¸³µ´Ù. º» ¿¬±¸¿¡¼­´Â ÇöÀå º£ÀÎÀü´Ü½ÃÇè ¹× »ïÃà¾ÐÃà½ÃÇè °á°ú¿ÍÀÇ ºñ±³¸¦ ÅëÇØ, DMT¸¦ ÀÌ¿ëÇÏ¿© ºñ¹è¼ö Àü´Ü°­µµ¸¦ ÃßÁ¤ÇÏ´Â µÎ °¡Áö ¹æ¹ýÀ» Á¦¾ÈÇÏ¿´´Ù. ù ¹øÂ°´Â $S_u/{sigma}'_v$¿Í Ⱦ¹æÇâ ÀÀ·ÂÁö¼öÀÇ °ü°è¸¦ ÀÌ¿ëÇÏ´Â ¹æ¹ýÀ̰í, µÎ ¹øÂ°´Â $N_c-I_D$ ¶Ç´Â $N_c-E_D$ °ü°è·ÎºÎÅÍ ºñ¹è¼ö Àü´Ü°­µµ¸¦ ÃßÁ¤ÇÏ´Â ¹æ¹ýÀÌ´Ù. º£ÀÎÀü´Ü½ÃÇè ¹× »ïÃà½ÃÇè °á°ú¿Í µÎ °¡Áö ÃßÁ¤¹æ¹ýÀ» ºñ±³ÇÑ °á°ú, $N_c-I_D$ ¶Ç´Â $N_c-E_D$ °ü°è¸¦ ÀÌ¿ëÇÑ ¹æ¹ýÀÌ $K_D$ ÀÌ¿ëÇÏ´Â ¹æ¹ýº¸´Ù ºñ¹è¼ö Àü´Ü°­µµ¸¦ Á¤È®ÇÏ°Ô ÃßÁ¤ÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. À̰ÍÀº $I_D$¿Í $E_D$°¡ ÅäÁú»óŸ¦ ¹Ý¿µÇÏ´Â $p_1-p_0$Ç×À» Æ÷ÇÔÇϰí ÀÖ¾î, $N_c$¸¦ ÀÌ¿ëÇÏ´Â ¹æ¹ýÀÌ ÅäÁúÀ» °í·ÁÇÑ ºñ¹è¼ö Àü´Ü°­µµ ÃßÁ¤À» ÇÒ ¼ö Àֱ⠶§¹®À¸·Î ÆÇ´ÜµÈ´Ù.
A series of dilatometer test, field vane test, and $CK_0U$ triaxial test were performed for clayey soils of Busan new port site to develop the relationships between undrained shear strength and the DMT results. Normalized undrained shear strength is turned out to be $S_{u(CKU)}/{sigma}'_v=0.30{sim}0.35;for;CK_0U$ triaxial test and ${mu}S_{u(VST)}/{sigma}'_v=0.20{sim}0.22$ for vane shear test. By comparing the undrained shear strength estimated from DMT indices with the results measured by in-situ vane test or $CK_0U$ triaxial test, two methods to predict the undrained shear strength from DMT results are suggested. One is based on the relationship between $S_u/{sigma}'_v$ and horizontal stress index (KD) while another method comes from $N_c-I_D$ and $N_c-E_D$ correlation. It was observed that the method based on $N_c-I_D;or;N_c-E_D$ relation shows slightly better accuracy than the one based on $K_D$ although all of the methods suggested in this study provided comparable values of predicted undrained shear strength. Since the definitions of $I_D;and;E_D$ contain $p_1-p_0$, in which soil condition is reflected, it is believed that the prediction method using $N_c$ is capable of taking a material type into consideration.
 
Ű¿öµå
Dilatometer (DMT);Triaxial test;Undrained shear stress;Vane Shear Test (VST);
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.23, no.7, 2007³â, pp.87-98
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200734514821714)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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