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Çѱ¹Áö¹Ý°øÇÐȸ / v.25, no.2, 2009³â, pp.45-54
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Àü±âºñÀúÇ× ÄÜ ÇÁ·Îºê¸¦ ÀÌ¿ëÇÑ ÇØ¾È ¿¬¾Ç Áö¹ÝÀÇ °£±Ø·ü »êÁ¤
( Porosity Evaluation of Offshore Soft Soils by Electrical Resistivity Cone Probe ) |
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| ÈëÀÇ Àü±âÀû Ư¼ºÀº Áö¹Ý »óŸ¦ Æò°¡ÇÏ´Â ¹æ¹ýÀ¸·Î »ç¿ëµÇ¾î ¿Ô´Ù. º» ³í¹®ÀÇ ¸ñÀûÀº ÇöÀå Áö¹ÝÀÇ °£±Ø·üÀ» ¿ì¼öÇÑ Á¤¹Ðµµ·Î Æò°¡Çϱâ À§ÇÑ ÇöÀå °üÀÔ¿ë Àü±âºñÀúÇ× ÄÜ ÇÁ·ÎºêÀÇ °³¹ß ¹× Àû¿ë¼º Æò°¡ÀÌ´Ù. Àü±âºñÀúÇ× ÄÜ ÇÁ·Îºê´Â °üÀÔ¿¡ µû¸¥ ±³¶õÀ» ÃÖ¼ÒȽÃ۱â À§ÇØ ÄÜ ¸ð¾çÀ¸·Î Á¦À۵Ǿú´Ù. ¶ÇÇÑ Àü±âÀû °£¼·À» ÃÖ¼ÒȽÃ۱â À§ÇØ ¿ÜºÎÀü±Ø°ú Áß½ÉÀü±ØÀÌ 4´ÜÀÚ ½Ö ȸ·Î ¹æ½ÄÀ¸·Î ±¸¼ºµÇ¾î ÀÖ´Ù. °³¹ßµÈ ÀåºñÀÇ ÇöÀå Àû¿ë¼º Á¤°¡¸¦ À§ÇÏ¿© ÀÎõ°ú ºÎ»ê¿¡¼ ÇöÀå½ÇÇèÀ» ¼öÇàÇÏ¿´À¸¸ç, ÄܰüÀÔÀåºñ¸¦ ÀÌ¿ëÇÏ¿© 0.33mm/secÀÇ ¼Óµµ·Î °üÀÔÇÏ¸é¼ ¼±´ÜºÎ¿¡¼ Àü±âºñÀúÇ× °ªÀ» ÃøÁ¤ÇÏ¿´´Ù. ÃøÁ¤µÈ Àü±âºñÀúÇ× °ª°ú ºñ±³¶õ ½Ã·á·ÎºÎÅÍ ¾òÀº °£±Ø¼öÀÇ Àü±âºñÀúÇ× °ªÀ» Archie¿¡ ÀÇÇØ Á¦¾ÈµÈ °æÇè½Ä¿¡ Àû¿ëÇÏ¿© ´ë»óÁö¹ÝÀÇ °£±Ø·üÀ» °è»êÇÏ¿´´Ù. Archie °æÇè½ÄÀÇ ½ÇÇè»ó¼ö´Â ºñ±³¶õ½Ã·á·ÎºÎÅÍ ÃßÃâÇÑ °£±Ø¼ö¿¡ ±Ù°ÅÇÏ¿© °áÁ¤ÇÏ¿´´Ù. »êÁ¤µÈ °£±Ø·üÀÇ ÇÁ·ÎÆÄÀÏÀ» µ¿ÀÏ Áö¿ª¿¡¼ ¼öÇàµÈ SPT, CPT, ±×¸®°í DMTÀÇ Áö¹ÝÁ¶»ç °á°ú¿Í ºñ±³ÇÑ °á°ú °æÇ⼺ÀÌ »ó´çÈ÷ À¯»çÇÑ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. º» ³í¹®¿¡¼ Á¦¾ÈµÈ ERCP´Â ´ë»ó Áö¹ÝÀÇ ±³¶õÀ» ÃÖ¼ÒȽÃ۸ç ÇöÀåÀÇ ±¹ºÎÀûÀÎ °£±Ø·ü »êÁ¤¿¡ È¿°úÀûÀÎ ÀåºñÀÏ °ÍÀ¸·Î ³ªÅ¸³µ´Ù. |
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| The electrical characteristics of soils have been used for investigating soil properties. The purpose of this study is the development and application of the electrical resistivity cone probe (ERCP) for the evelation of the porosity in the field with high precision. The shape of the probe tip is a cone shape to minimize the disturbance during penetration. In addition, the four terminal pair configuration is adopted to minimize the electrical interference. The electrical resistances are continuously measured during penetration of the ERCP using penetration rigs with 0.33 mm/sec penetration rate at Incheon and Busan sites. With the measured resistance profile and electrical resisivity of electrolyte of undisturbed samples, soil porosity profiles are obtained by using Archie's law. The empirical coefficients for the Archie's law are obtained based on the electrolyte extracted from the undisturbed samples. The estimated porosity profiles show similar trends to those of in-situ penetration tests such as SPT, CPT, and DMT. This study suggests that the ERCP may be an effective tool for the porosity estimation in the field with minimum disturbance. |
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| Ű¿öµå |
| Archie's law;Electrical resistance;Penetration test;Porosity; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.25, no.2, 2009³â, pp.45-54
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200911440579877)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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