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Çѱ¹Áö¹Ý°øÇÐȸ / v.25, no.11, 2009³â, pp.105-115
Á¦ÁÖ¿¬¾È ÅðÀûÃþÀÇ °í°á Æò°¡
( Evaluation of Cementation Effect of Jeju Coastal Sediments )
À̹®ÁÖ;±èÀçÁ¤;½ÉÀç¹ü;ÀÓä±Ù;ÀÌ¿ìÁø; °í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇкÎ;°í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇкÎ;»ï¼º¹°»ê Åä¸ñ»ç¾÷º»ºÎ Åä¸ñENGÆÀ;¾ËÁö¿ÀÀÌ¿£¾¾;°í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇкÎ;
 
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º» ¿¬±¸¿¡¼­´Â Á¦ÁÖÆ¯º°ÀÚÄ¡µµ °­Á¤Ç× ÀÎ±Ù ÇØ¿ª¿¡¼­ äÃëÇÑ ÇØ»çÀÇ ±âº»Æ¯¼ºÀ» ºÐ¼®Çϰí, ½Ç³» è¹ö½ÃÇèÀ¸·ÎºÎÅÍ ¹Ì°í°á Á¦ÁÖÇØ»çÀÇ Äܼ±´ÜÀúÇ×-»ó´ë¹Ðµµ-¿¬Á÷±¸¼Ó¾ÐÀÇ °ü°è¸¦ °áÁ¤ÇÏ¿´´Ù. ¶ÇÇÑ ÇöÀå Ç¥ÁذüÀÔ½ÃÇè, ÄܰüÀÔ½ÃÇè, Suspension-PS °ËÃþÀ» ¼öÇàÇÏ¿© Á¦ÁÖÀÎ±Ù ÇØ¿ª ÅðÀûÃþÀÇ °í°á°¡´É¼ºÀ» Æò°¡ÇÏ¿´´Ù. ½ÃÇè°á°ú, Á¦ÁÖÇØ»ç´Â ÀÔÀÚÀÇ °¢Áø Á¤µµ°¡ Å©°í ÀÔÀÚÇ¥¸é°ú ³»ºÎ¿¡ °ø±ØÀÌ ¹ß´ÞÇÏ¿© ÃÖ´ë, ÃÖ¼Ò°£±Øºñ°¡ Å« ź»ê¿° ¸ð·¡ÀÇ Æ¯¼ºÀ» °¡Áö°í ÀÖ¾úÀ¸¸ç, Å« ¾ÐÃ༺À» °¡Áø ±Ô»ê¿° ¸ð·¡¿Í À¯»çÇÑ Äܼ±´ÜÀúÇ× ºÐÆ÷¸¦ ³ªÅ¸³»¾ú´Ù. ±×·¯³ª ¹Ì°í°á Á¦ÁÖÇØ»çÀÇ $q_c-D_R-{sigma}_v'$ °ü°è´Â Á¦ÁÖÀÎ±Ù ÇØ¿ª ÅðÀûÃþÀÇ »ó´ë¹Ðµµ¸¦ °ú´ëÆò°¡ÇÏ¿´´Ù. °üÀÔ½ÃÇè(CPT, SPT) °á°ú¿Í Suspension-PS ½ÃÇè¿¡ ÀÇÇÑ ¹Ì¼Òº¯ÇüÀü´Üź¼º°è¼ö¸¦ ºñ±³ÇÑ °á°ú, Á¦ÁÖÀÎ±Ù ÇØ¿ªÀÇ ÅðÀûÃþÀº °í°á °¡´É¼ºÀÌ ¸Å¿ì ³ôÀº °ÍÀ¸·Î È®ÀεǾú´Ù.
The Jeju sand was sampled from the beach in Jeju Island and its basic properties were analyzed. The cementation effect of Jeju coastal sediments was evaluated from in-situ tests such as SPT, CPT, and the Suspension-PS test. It was shown from test results that the Jeju sand has high extreme void ratios due to the angularity of grains and the intra-particle voids of hollow particles, similar to typical calcareous sands. From cone penetration test in the calibration chamber, it was found that the cone resistance($q_c$)-relative density($D_R$)-vertical effective stress(${sigma}_v'$) relation of Jeju sand almost matches that of high compressible quartz sand. However, the $q_C-D_R-{sigma}_v'$ correlation suggested for uncemented Jeju sand overestimates the relative density of coastal sediments of Jeju Island due to the cementation effect. From the analysis of the relation of cone resistance, N value, and small strain shear modulus measured in-situ, it seems reasonable to assume that the coastal sediment of Jeju Island is a naturally cemented one.
 
Ű¿öµå
Calcareous sand;Cementation;Cone resistance;Jeju sand;N value;Small strain shear modulus;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.25, no.11, 2009³â, pp.105-115
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200908856856081)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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