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Çѱ¹Áö¹Ý°øÇÐȸ / v.15, no.4, 1999³â, pp.133-152
¹Ýº¹»ïÃà½ÃÇè¿¡ ÀÇÇÑ ½ÇÆ® ¸ð·¡ Áö¹ÝÀÇ ¾×»óÈ­ Ư¼º ¿¬±¸
( The Study on Liquefaction Characteristics of Silty Sand Soils by Cyclic Triaxial Test )
À̼Û;ÀüÁ¦¼º;±èÅÂÈÆ; ¼­¿ï½Ã¸³´ëÇб³ µµ½Ã°úÇдëÇÐ Åä¸ñ°øÇаú;¼­¿ï½Ã¸³´ëÇб³ µµ½Ã°úÇдëÇÐ Åä¸ñ°øÇаú;¼­¿ï½Ã¸³´ëÇб³ µµ½Ã°úÇдëÇÐ Åä¸ñ°øÇаú;
 
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±¹³» ¼­ÇØ¾È ½ÇÆ®Áú ¸ð·¡ÀÇ ¾×»óÈ­ Ư¼º°ú ½Ã·á±³¶õÀÇ ¿µÇâÀ» ÆÄ¾ÇÇϰíÀÚ ±³¶õµÈ ½Ã·á¸¦ À缺ÇüÇÏ¿© ¹Ýº¹»ïÃà½ÃÇèÀ» ¼öÇàÇÏ¿´´Ù. ¸ÕÀú, ½ÇÆ®Áú ¸ð·¡ÀÇ ÀÀ·Â-º¯Çü °Åµ¿¿¡¼­ ÃຯÇü·ü $pm10%$ ±Ùó¿¡¼­ ¾×»óÈ­ Çö»óÀÌ ¹ß»ýÇßÀ¸¸ç, °£±Ø¼ö¾Ð °Åµ¿Àº Seed, Martin, Lysmer µî(1975)ÀÌ Á¦¾ÈÇÑ ½Ä°ú °ÅÀÇ À¯»çÇß´Ù. ¶ÇÇÑ, ½Ã·áÀÇ ÆÄ±«½Ã dilatancy Çö»óÀ» »ìÆìº¼ ¼ö ÀÖ¾ú´Ù. ´ÙÀ½Àº ¿©·¯ ¿¬±¸ÀÚµéÀÌ Á¦¾ÈÇÑ ¾×»óÈ­ Æò°¡¹æ¹ýµéÀ» ½Ç½ÃÇÏ¿© ±× °á°ú¸¦ ºñ±³ÇßÀ»¶§ ¾×»óÈ­¿¡ Ãë¾àÇÑ ½Éµµ¸¦ ºñ½ÁÇÏ°Ô ³ªÅ¸³»°í ÀÖ¾úÀ¸¸ç, À缺ÇüÀ» ½Ç½ÃÇÑ ¹Ýº¹»ïÃà½ÃÇèÀ» ÅëÇÑ ¹æ¹ýÀº ±× Áß °¡Àå ³·Àº ¾ÈÀüÀ²À» ³ªÅ¸³»°í ÀÖ¾ú´Ù. ¶ÇÇÑ, ¹Ýº¹»ïÃà ½ÃÇèÀ¸·Î ±¸ÇÑ ÀÀ·Âºñ¿Í °æÇèÀû ¹æ¹ýÀÇ Ç¥ÁذüÀÔ½ÃÇè N°ªÀ¸·Î ±¸ÇÑ ÀÀ·Âºñ¸¦ ºñ±³ÇßÀ»¶§ ½Ã·á±³¶õÀÇ ¿µÇâÀº N°ªÀÌ 20ÀÌÇÏ¿¡¼­´Â »ó´ëÀûÀ¸·Î ÀÛÁö¸¸, N°ªÀÌ 20ÀÌ»óÀÏ ¶§ ±³¶õÀÇ È¿°ú¿Í ½Ã·á À缺Çü½ÃÀÇ ¹®Á¦Á¡ µîÀ¸·Î ¾×»óÈ­ ÀúÇ׷°ú ¾ÈÀüÀ²¿¡¼­ Å« Â÷À̸¦ º¸¿´´Ù.
The cyclic triaxial test was carried out to research liquefaction characteristics and sample disturbance effects of silty sand soils at the west coast in Korea. First, liquefaction in silty sand was generated when axial strain approached to $pm10%$ of strain and behavior of pore pressure was similar to the formula suggested by Seed, Martin, and Lysmer(1975). Also, it was found that dilatancy was generated at failure. Secondly, the liquefaction evaluation methods suggested by many researchers were carried out and the results were compared. In these methods the weak depth in liquefaction was similar and the method carried out by cyclic triaxial test on remolded sample showed the least safety factor. Thirdly the stress ratio by cyclic triaxial test was compared with that obtained from SPT N-value as a kind of empirical methods. It was found that the effect of sample disturbance was relatively small when SPT N-value was less than 20, but there were large differences in safety factor and resistance of liquefaction in soil by the effects of disturbance and remolding when SPT N-value was more than 20.
 
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Liquefaction;Dilatancy;Cyclic shear stress ratio;Empirical method;Disturbance effect;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.15, no.4, 1999³â, pp.133-152
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199911921749375)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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