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Çѱ¹Áö¹Ý°øÇÐȸ / v.26, no.12, 2010³â, pp.71-79
Áö¹ÝÁ¤¼öÀÇ º¯µ¿¼º ÃßÁ¤ ¹× °á°úÀÇ È°¿ë
( Estimation of Variability of Soil Properties and Its Application to Geotechnical Engineering Design )
±èµ¿ÈÖ;±è¹ÎÅÂ;ÀÌâȣ;ÀÌ¿ìÁø; °í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇкÎ;°í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇкÎ;Á¶Áö¾Æ°ø´ë Åä¸ñȯ°æ°øÇаú;°í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇкÎ;
 
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¼³°èÁö¹ÝÁ¤¼öÀÇ ÇÕ¸®ÀûÀÎ °áÁ¤°ú È®·ü·ÐÀû ¹æ¹ý¿¡ ÀÇÇÑ Áö¹Ý±¸Á¶¹°ÀÇ ¼³°è¸¦ À§Çؼ­´Â Áö¹ÝÁ¤¼öÀÇ º¯µ¿°è¼ö¿¡ ´ëÇÑ ½Å·Ú¼º ÀÖ´Â ÃßÁ¤ÀÌ ÇÊ¿äÇÏ´Ù. º» ³í¹®¿¡¼­´Â ÀÎõ ¼ÛµµÁö¿ªÀÇ Áö¹ÝÁ¶»çÀڷḦ ÀÌ¿ëÇÏ¿© Three-Sigma Rule ¹× Åë°èÀûÀÎ ¹æ¹ý°ú °°Àº Ç¥ÁØÆíÂ÷ ÃßÁ¤¹æ¹ýÀÇ Àû¿ë¼ºÀ» Æò°¡ÇØ º¸¾Ò´Ù. ¹«ÀÛÀ§¼ºÀ» º¸ÀÌ´Â Áö¹Ý ¹°¼º°ª Áß, º¯µ¿¼ºÀÌ ÀÛÀº ${gamma}_t$, ${gamma}_b$, $e_0$´Â $N_o=6$À», »ó´ëÀûÀ¸·Î º¯µ¿¼ºÀÌ Å« $C_{alpha}/C_c$, $C_c(1+e_0)$, $c_v$, $k_v$ÀÇ °æ¿ì $N_{sigma}$=4.2~5.3À» »ç¿ëÇÏ¿© Three-Sigma RuleÀ» Àû¿ëÇϸé Åë°èÇÐÀû ¹æ¹ý°ú À¯»çÇÑ °á°ú¸¦ ¾ò´Â °ÍÀÌ °üÂûµÇ¾ú´Ù. ¶ÇÇÑ ±íÀÌ¿¡ µû¶ó °æÇ⼺À» º¸ÀÌ´Â ºñ¹è¼öÀü ´Ü°­µµ´Â ¾à 40%ÀÇ º¯µ¿°è¼ö¸¦ º¸ÀÌ´Â °ÍÀ¸·Î °üÂûµÇ¾úÀ¸¸ç $N_{sigma}$=4¸¦ »ç¿ëÇϸé Three-Sigma Rule·Î ¾ò´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. º» ³í¹®¿¡¼­ ÃßÁ¤ÇÑ º¯µ¿°è¼ö¸¦ ÀÌ¿ëÇÏ¿© Áö¹ÝÁ¤¼öÀÇ ½Å·Ú±¸°£, Ư¼º°ªÀ» °áÁ¤ÇÒ ¼ö ÀÖ¾ú´Ù.
The reliable evaluation of the coefficient of variation (COV) of soil properties is required for the determination of adequate design values and the application of a probabilistic method for the design of geotechnical structures. In this paper, the applicability of methods for estimating the standard deviation, such as the. Three-Sigma Rule and a statistical method, is evaluated by using site investigation data of the Songdo area. It is found that the Three-Sigma Rule provides similar results to those of a statistical method when using $N_{sigma}$=6 for the property with small variability and $N_{sigma}$=4.2~5.3 for the property with large variability. It is also observed that, for the undrained shear strength that has an increasing trend with depth, a $N_{sigma}$ value of 4 is adequate for the evaluation of the variability by the Three-Sigma Rule. The COVs of soil properties determined in this paper could be used in the estimation of the confidence interval and characteristic values of soil properties.
 
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Characteristic value;Coefficient of variation;Confidence interval;Probabilistic analysis;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.26, no.12, 2010³â, pp.71-79
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201014435572038)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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