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Çѱ¹Áö¹Ý°øÇÐȸ / v.18, no.6, 2002³â, pp.129-139
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( Variation of Dielectric Constant of Sand due to Water Content and Measuring Frequency ) |
| ÀÌÁÖÇü;¿À¸íÇÐ;¹ÚÁعü;±èÇü¼®; Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø;¼¿ï´ëÇб³ Áö±¸È¯°æ½Ã½ºÅÛ°øÇкÎ;¼¿ï´ëÇб³ Áö±¸È¯°æ½Ã½ºÅÛ°øÇкÎ;ÀüÀÚÀü±â°øÇкÎ;
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| ÃÖ±Ù Áö¹Ý Ư¼º°ú Áö¹Ý ¿À¿°µµÀÇ Á¶»ç¸¦ À§ÇØ À¯Àü»ó¼ö ÃøÁ¤±â¹ýÀ» Àû¿ëÇϱâ À§ÇÑ ¿¬±¸°¡ Ȱ¹ßÈ÷ ÁøÇàµÇ°í ÀÖ´Ù. º» ¿¬±¸¿¡¼´Â ´Ù¾çÇÑ ÇÔ¼öºñ¿Í °ÇÁ¶´ÜÀ§Áß·®À» °®´Â ȰdzÈÅä¿Í ÁÖ¹®ÁøÇ¥ÁØ»çÀÇ À¯Àü»ó¼ö¸¦ 75kHz¢¦12MHzÀÇ Á֯ļö ¹üÀ§¿¡¼ ÃøÁ¤ÇÏ¿´´Ù. »çÁúÅäÀÇ À¯Àü»ó¼ö´Â Á֯ļö°¡ Áõ°¡ÇÔ¿¡ µû¶ó °¨¼ÒÇÏ´Â ºÐ»ê°Åµ¿À» º¸¿´´Ù. ¶ÇÇÑ ÇÔ¼ö ºñ³ª °ÇÁ¶´ÜÀ§Áß·®ÀÌ Áõ°¡ÇÔ¿¡ µû¶ó ¹èÇâºÐ±Ø¿¡ ±â¿©ÇÏ´Â ¹°ºÐÀÚÀÇ ¾çÀÌ Áõ°¡Çϰí À¯Àü»ó¼ö°¡ 1ÀÎ °ø±âÀÇ ¾çÀÌ °¨¼ÒÇÏ¿© À¯Àü»ó¼ö°¡ Áõ°¡ÇÏ¿´´Ù. ÈëÀÇ À¯ÀüƯ¼ºÀº ÇÔ¼öºñ¿Í °ÇÁ¶´ÜÀ§Áß·®À» ¸ðµÎ °í·ÁÇÑ ¼öºÐ¹Ðµµ¿¡ ¼±ÇüÀûÀ¸·Î ºñ·ÊÇÏ´Â °æÇâÀ» ³ªÅ¸³»¾ú´Ù. Maxwell½Ä, Topp½Ä, CRIM½Ä¿¡ ÀÇÇÑ °è»ê°ª°ú ÃøÁ¤µÈ °ªÀ» ºñ±³ÇÑ °á°ú ±âÁ¸ÀÇ ½ÄÀº À¯Àü»ó¼öÀÇ ºÐ»ê°Åµ¿À» °í·ÁÇÏÁö ¸øÇϰí Àֱ⠶§¹®¿¡ ÀúÁÖÆÄ¿¡¼´Â ÃøÁ¤°ª°ú Â÷À̸¦ ³ªÅ¸³»¾ú´Ù. |
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| Dielectric constant measurement has drawn much attention in the investigation of the properties and contaminations of subsurface. In this study, by varying the frequency from 75 kHz to 12 MHz, dielectric constant was measured for the weathered granite soil and Jumunjin sand having different water contents and dry density. The dielectric constant of sand showed the dispersive behavior indicating that dielectric constant decreased with frequency of an electric field. And the dielectric constant of soil increased as water content and/or dry density increased due to the decrease of air portion and/or the increase of amount of water molecules which could contribute to the development of orientation polarization. The dielectric constant of sand showed a linear relationship with the moisture density, considering both water content and dry density. At low frequency, the dielectric constants calculated by Maxwell's, Topp's and CRIM equation deviated from measured values. It could be explained by the fact that those equations did not consider dispersive behavior of dielectric constant with the frequency. |
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| Ű¿öµå |
| Dielectric constant;Frequency;Moisture density;Polarization; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.18, no.6, 2002³â, pp.129-139
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211921511382)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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