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Çѱ¹Áö¹Ý°øÇÐȸ / v.24, no.11, 2008³â, pp.79-89
½ÇÆ®Áú ÇÔÀ¯·®¿¡ µû¸¥ ³«µ¿°­ ¸ð·¡ÀÇ ºñ¹è¼ö ¹Ýº¹Àü´Ü°Åµ¿ Ư¼º
( Characteristics of Undrained Cyclic Shear Behavior of Nak-Dong River Sand by Silt Contents )
±è¿µ¼ö;±è´ë¸¸; °æºÏ´ëÇб³ Åä¸ñ°øÇаú;°æºÏ´ëÇб³ Åä¸ñ°øÇаú;
 
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º» ¿¬±¸¿¡¼­´Â ³«µ¿°­ À¯¿ª¿¡ ºÐÆ÷ÇÏ´Â ¸ð·¡¿Í ½ÇÆ®¸¦ ´ë»óÀ¸·Î ½ÇÆ® ÇÔÀ¯·®¿¡ µû¸¥ ¸ð·¡ÀÇ ºñ¹è¼ö ¹Ýº¹Àü´Ü°­µµ Ư¼ºÀ» ÆÄ¾ÇÇϱâ À§ÇÏ¿© À̹æ¾Ð¹Ðºñ($K_c$=1.0, 1.5, 2.0)¸¦ ´Þ¸®ÇÏ¿© ÀÏ·ÃÀÇ ºñ¹è¼ö ¹Ýº¹»ïÃà½ÃÇèÀ» ½Ç½ÃÇÏ¿´´Ù. ½ÃÇè°á°ú ¸ðµç $K_c$¿¡¼­ ½ÇÆ® ÇÔÀ¯·®ÀÌ Áõ°¡ÇÔ¿¡ µû¶ó ¹Ýº¹Àü´ÜÀÀ·Âºñ(CSR)°¡ °¨¼ÒÇÏ¿´À¸¸ç, $K_c$°¡ Áõ°¡ÇÒ¼ö·Ï ½ÇÆ® ÇÔÀ¯·® Áõ°¡¿¡ ÀÇÇÑ CSRÀÇ °¨¼Ò°¡ ´õ Å©°Ô ³ªÅ¸³µ´Ù. Àü´Ü½Ã ¹ß»ýµÇ´Â °úÀ×°£±Ø¼ö¾ÐÀº $K_c$¿¡ °ü°è¾øÀÌ ½ÇÆ® ÇÔÀ¯·® Áõ°¡¿¡ µû¶ó Ãʱ⠰úÀ×°£±Ø¼ö¾ÐÀÌ Å©°Ô ¹ß»ýµÇ¾î CSRÀÇ °¨¼Ò¿¡ ¿µÇâÀ» ¹ÌÃÆÀ¸¸ç, ¶ÇÇÑ ¾Ð¹Ð ÈÄ ½Ã·áÀÇ skeleton °£±Øºñ¸¦ »êÁ¤ÇÏ¿© ºÐ¼®ÇÑ °á°ú ½ÇÆ® ÇÔÀ¯·® Áõ°¡¿¡ ºñ·ÊÇÏ¿© Àü¹ÝÀûÀ¸·Î skeleton °£±Øºñ°¡ Å©°Ô Áõ°¡ÇÏ¿© Ãʱ⠰úÀ×°£±Ø¼ö¾ÐÀÇ Áõ°¡¿Í ´õºí¾î CSR °¨¼ÒÀÇ ÁÖ¿ä¿øÀÎÀ¸·Î ÆÄ¾ÇµÇ¾ú´Ù.
In this study, a series of undrained cyclic triaxial tests were performed with three different consolidation stress ratios ($K_c$=1.0, 1.5, 2.0) to investigate the undrained shear strength characteristics of sands with respect to the amount of contained silt located around the basin of Nak-dong River. The test results show that the more the sand has silt, the lower is cyclic shear stress ratio (CSR) in all $K_c$ and that the higher $K_c$ goes, the larger CSR decreases due to the increase of contained silt. The excessive pore pressure caused during shearing has an influence on the decrease of CSR by the high initial pore pressure in proportion to the amount of contained silt regardless of the $K_c$ value. After consolidation, the analysis of the skeleton void ratio of the sample reveals that the main cause of the decrease of CSR as well as the increase of the initial excessive pore pressure is the increase of the skeleton void ratio in proportion to the amount of contained silt.
 
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Consolidation stress ratio;Cyclic stress ratio (CSR);Cyclic triaxial test;Silt content;Skeleton void ratio;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.24, no.11, 2008³â, pp.79-89
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200806135608619)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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