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Çѱ¹Áö¹Ý°øÇÐȸ / v.25, no.6, 2009³â, pp.17-29
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µ¿ÇØ, ¿ï¸ª ºÐÁö ½ÉÇØÅäÀÇ Áö¹Ý°øÇÐÆ¯¼º
( Geotechnical Engineering Characteristics of Ulleung Basin Sediment, East Sea ) |
| ÀÌâȣ;À±Å¼·;»êŸ¸¶¸®³ª;¹ÚÀåÁØ;ÀÌÁ¾¼·; Á¶Áö¾Æ°ø´ë Åä¸ñȯ°æ°øÇаú;¸®ÇÏÀÌ´ëÇб³ Åä¿Áȯ°æ°øÇаú;Á¶Áö¾Æ°ø´ë Åä¸ñȯ°æ°øÇаú;Çѱ¹ÁöÁúÀÚ¿ø¿¬±¸¿ø;°í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇкÎ;
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| ¿¡³ÊÁö ¼ö¿äÀÇ Áõ°¡ ¹× ¿¡³ÊÁö Ž»ç¿Í ¿¬°üµÇ¾î ÇØÀú Áö¹ÝÀÇ Á¶»ç°¡ Áõ°¡Çϰí ÀÖ´Ù. ÇØ¼ö¸é 2100m ÇØÀú 110m ¾Æ·¡¿¡¼ ¾ò¾îÁø ¾Ð·Â ÄÚ¾î ½Ã·áÀÇ ¸Þź ÇÏÀ̵巹ÀÌÆ® »ý»ê ½ÃÇè ÈÄ ¾ò¾îÁø »ç·á¸¦ ÀÌ¿ëÇÏ¿© ¿ï¸ª ºÐÁö ½ÉÇØÅäÀÇ Áö¹Ý°øÇÐÀû Ư¼ºÀ» Á¶»çÇÏ¿´´Ù. ±âº» Å伺, ±¤¹°ÇÐÀû Ư¼º, ÈÇÐ Á¶¼º, ±×¸®°í ¹Ì¼¼±¸Á¶ °üÂûÀ» À§ÇÏ¿© Å伺 ½ÇÇè, XRD, ±×¸®°í SEMÀ» ½Ç½ÃÇÏ¿´´Ù. ¶ÇÇÑ, ¸ÖƼ ¼¾¼ ¾Ð¹Ð¼¿À» ÀÌ¿ëÇÏ¿© µÎ ½Ã·áÀÇ ¾ÐÃ༺, Àü´ÜÆÄ ¹× ÀüÀÚ±âÆÄ ÆÄ¾ÇÇÏ¿´´Ù. °µµÆ¯¼ºÀº Á÷Á¢Àü´Ü½ÇÇè ÀÌ¿ëÇÏ¿© »êÁ¤µÇ¾ú´Ù. ÁÖ¿ä ±¤¹°·Î´Â Ä«¿À¸®³ªÀÌÆ®, À϶óÀÌÆ®, Å©·Î¶óÀÌÆ®(chlorite), ±×¸®°í ͽÎÀÌÆ®(calcite)°¡ °üÂûµÇ¾ú´Ù. SEM °á°ú Àß ¹ß´ÞµÈ ³» ¿ÜºÎ °£±Ø ±¸Á¶°¡ °üÂûµÇ¾ú´Ù. ¼öÁ÷À¯È¿ÀÀ·ÂÀÇ Áõ°¡¿¡ µû¶ó Àü´ÜÆÄ ¼Óµµ, Àü±âºñÀúÇ×, ½Ç¼ö À¯ÀüÀ², ±×¸®°í Àü±âÀüµµµµ´Â ÀÌÁß¼±Çü °Åµ¿À» º¸¿´´Ù. Á÷Á¢Àü´Ü½ÇÇèÀ¸·Î ¾òÀº ¸¶Âû°¢Àº ¾à $21^{circ}$·Î ¼±Ç࿬±¸¿Í ºñ½ÁÇÑ °á°ú¸¦ º¸¿´´Ù. º» ¿¬±¸´Â °¡½º ÇÏÀ̵巹ÀÌÆ®¿Í °°Àº ¿¡³ÊÁö ÀÚ¿øÀÇ °³¹ß ¹× »õ·Î¿î Áö¹Ý°øÇÐÀû ¿µ¿ªÀÇ È®º¸¸¦ À§ÇÏ¿© ½ÉÇØ ÅðÀûÅäÀÇ °Åµ¿ ÀÌÇØÀÇ Á߿伺À» º¸¿©ÁØ´Ù. |
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| There has been an increase in the investigation of deep sea sediments with a consequent increase in the amount of energy required to undertake these investigations. The geotechnical characteristics of Ulleung Basin sediment are explored by using depressurized specimens following methane production tests carried out on pressured core samples obtained at 2,100 m water depth and 110 m below sea floor. Geotechnical index tests, X-ray diffraction, and scanning electron microscope are conducted to identify the geotechnical index parameters, clay mineralogy, chemical composition, and microstructure of the sediments. Compressibility, and elastic and electromagnetic wave parameters are investigated for two samples by using a multi sensing instrumented oedometer cell. The strength chatracteristics are obtained by the direct shear tests. The dominant clay minerals are mostly kaolinite, illite, chlorite, and calcite. The SEM shows a well-developed flocculated structure of the microfossil. Void ratio, electrical resistivity, real permittivity, conductivity, and shear wave velocity show bi-linear behavior with the effective vertical stress: as the vertical effective stress increases. The friction angle obtained by the direct shear test is about $21^{circ}$, which is similar to the value observed in the Ulleung Basin sediments. This study shows that the understanding of the behavior acting on the diatomaceous marine sediment is important because it often maintains the useful energy resources such as gas hydrate and so will be the new engineering field in the next generation. |
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| Ű¿öµå |
| Atterberg limit;Compressibility;Conductivity;Deep marine sediment;Microfossil;Microstructure;Mineralogy;Permittivity;Shear wave; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.25, no.6, 2009³â, pp.17-29
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200926158875963)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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