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Çѱ¹Áö¹Ý°øÇÐȸ / v.15, no.6, 1999³â, pp.307-317
±¹³» ¹ß»ý ÁöÁø±Ô¸ð¸¦ °í·ÁÇÑ ¾×»óÈ­ÀúÇ×°­µµ »êÁ¤
( Evaluation of Liquefaction Strength Based on Korean Earthquake Magnitude )
½ÅÀ±¼·;¹ÚÀÎÁØ;ÃÖÀç¼ø;±è¼öÀÏ; ¿¬¼¼´ëÇб³ ´ëÇпø Åä¸ñ°øÇаú;¿¬¼¼´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;¿¬¼¼´ëÇб³ ´ëÇпø Åä¸ñ°øÇаú;¿¬¼¼´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;
 
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º» ¿¬±¸¿¡¼­´Â ±âÁ¸ÀÇ ¾×»óÈ­ Æò°¡¹æ¹ý°ú ±¹³»ÀÇ ÁöÁø±Ô¸ð(M=6.5)¸¦ °í·ÁÇÑ ¼öÁ¤ »ó¼¼¿¹Ãø¹ýÀ» ºñ±³ ºÐ¼®ÇÏ¿´´Ù. ¾×»óÈ­ ¹ß»ý °¡´É¼ºÀº ÈëÀÇ ¾×»óÈ­ ÀúÇ×°­µµ¿Í ÁöÁø¿¡ ÀÇÇØ ÅäÃþ³»¿¡ À¯¹ßµÇ´Â Àü´ÜÀÀ·ÂÀ» ºñ±³ÇÏ¿© Æò°¡ÇÏ¿´´Ù. ÁöÁø¿¡ ÀÇÇÑ Àü´ÜÀÀ·ÂÀº ÁöÁøÀÀ´äÇØ¼®À» ÀÌ¿ëÇÏ¿© »êÁ¤Çϸç ÈëÀÇ ¾×»óÈ­ ÀúÇ×°­µµ´Â Áøµ¿»ïÃà½ÃÇè°á°ú¸¦ ÀÌ¿ëÇÏ¿© »êÁ¤ÇÑ´Ù. Áøµ¿»ïÃà½ÃÇèÀº »ó´ë¹Ðµµ(50%, 60%, 70%)¿Í ÃʱâÀ¯È¿±¸¼Ó¾Ð(70kPa, 100kPa, 150kPa) ±×¸®°í ¼¼¸³ºÐÇÔÀ¯·®(10%, 20%, 30%)À» º¯È­½ÃŰ¸ç ½Ã·á¸¦ À缺ÇüÇÏ¿© ¼öÇàÇÏ¿´´Ù. ±âÁ¸ÀÇ ¾×»óÈ­ Æò°¡¹æ¹ý°ú ¼öÁ¤ »ó¼¼ ¿¹Ãø¹ý °á°ú¸¦ ºñ±³ÇØ º¼ ¶§, ¼öÁ¤ »ó¼¼ ¿¹Ãø¹ýÀº ¿¬¾àÇÑ »çÁúÅäÁö¹Ý$(FS leq1.5)$¿¡¼­ ¾×»óÈ­ ¾ÈÀüÀ²À» ±âÁ¸ Æò°¡¹æ¹ý¿¡ ºñÇÏ¿© Å©°Ô »êÁ¤ÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. º» ¿¬±¸°á°ú¸¦ Åä´ë·Î ¾×»óÈ­ ¹ß»ý°¡´É¼º ÆÇÁ¤½Ã, Áøµ¿»ïÃà½ÃÇè¿¡ ±âÃÊÇÑ ¼öÁ¤ »ó¼¼ ¿¹Ãø¹ýÀ» ÀÌ¿ëÇϵµ·Ï Á¦¾ÈÇÏ¿´´Ù. ¶ÇÇÑ ±¹³» ¹ß»ý ÁöÁø±Ô¸ð 6.5¸¦ °í·ÁÇÑ ¼öÁ¤ »ó¼¼ ¿¹Ãø¹ý¿¡¼­ÀÇ ¾×»óÈ­°¡ ¹ß»ýÇÒ ¼ö ÀÖ´Â ÃÖ´ë½Éµµ´Â ¾à 15mÀÎ °ÍÀ¸·Î ³ªÅ¸³µ´Ù.
The purpose of this study is to utilize conventional procedures for evaluation of liquefaction potential and to compare the results obtained by modified detailed method based on Korean earthquake magnitude (M=6.5). Liquefaction potential is assessed by comparing liquefaction strength of soil and cyclic shear stress generated in the soil layers during earthquakes. The cyclic shear stress is computed from the earthquake response analysis, and liquefaction strength of soil is evaluated by using results from cyclic triaxial tests. The cyclic triaxial tests are performed on many different conditions of sample ; relative densities(50%, 60%, and 70%), initial effective confining pressures (70kPa, 100kPa, and 150kPa), and fine contents(10%, 20%, and 30%). From the result of comparing the conventional procedure with the modified detailed method, it is found that the modified detailed method tends to evaluate larger safety factor against liquefaction in the weak sand site$(FS leq1.5)$. Therefore in this case, it is suggested that liquefaction potential should be evaluated by using the modified detailed method based on cyclic triaxial tests. It is also found that in modified detailed method based on earthquake magnitude 6.5, critical depth where liquefaction can be generated is around 15m from the ground surface.
 
Ű¿öµå
Liquefaction;Cyclic shear stress;Liquefaction strength of soil;Cyclic triaxial test;Relative density;Initial effective confining pressure;Fine content;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.15, no.6, 1999³â, pp.307-317
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199911921749959)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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