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Çѱ¹Áö¹Ý°øÇÐȸ / v.22, no.4, 2006³â, pp.85-94
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°í°á(Cementation)¿¡ µû¸¥ ¸ð·¡ÀÇ ºñ¹è¼ö Àü´Ü°Åµ¿ º¯È
( Changes of Undrained Shear Behavior of Sand due to Cementation ) |
| ÀÌ¿ìÁø;À̹®ÁÖ;ÃÖ¼º±Ù;È«¼ºÁø; °í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;°í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;°í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;°í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;
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| º» ³í¹®¿¡¼´Â °í°á(Cementation)¿¡ ÀÇÇÑ ¸ð·¡ÀÇ ºñ¹è¼ö °Åµ¿º¯È¸¦ ÆÄ¾ÇÇϱâ À§ÇÏ¿© ¼®°í¸¦ °í°áÀ¯¹ßÁ¦·Î »ç¿ëÇÑ ½Ã·á¸¦ Á¶¼ºÇÑ ÈÄ µî¹æ»ïÃà½ÃÇè(CIU)À» ½Ç½ÃÇÏ¿´À¸¸ç, »ó´ë¹Ðµµ ¹× °í°áÁ¤µµ¿¡ µû¸¥ °Åµ¿ ¾ç»óÀ» ºÐ¼®ÇÏ¿´´Ù. ¿¬±¸°á°ú ¸ð·¡ÀÇ °í°áÀº Ç׺¹°µµ$(q_y)$, Ç׺¹½Ã ÇÒ¼±Åº¼º°è¼ö$(E_y)$, ÷µÎ¸¶Âû°¢$(Phi_p)$ÀÇ »ó´çÇÑ Áõ°¡¸¦ À¯¹ß½Ã۰í, »ó´ë¹Ðµµº¸´Ù ¸ð·¡ÀÇ °Åµ¿¿¡ ´õ Å« ¿µÇâÀ» ³¢Ä¡´Â °ÍÀ¸·Î È®ÀεǾú´Ù. ±×·¯³ª °í°á°áÇÕÀÌ ÆÄ±«µÈ ÀÌÈÄ, ¸ð·¡ÀÇ °Åµ¿Àº °í°áº¸´Ù´Â »ó´ë¹ÐµµÀÇ ¿µÇâÀ» ´õ Å©°Ô ¹Þ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¶ÇÇÑ °í°á°áÇÕ¿¡ ÀÇÇÑ ¾ÐÃ༺ °¨¼Ò´Â °£±Ø¼ö¾Ð ¹ß»ýÀ²À» °¨¼Ò½ÃÄÑ °í°á¸ð·¡ÀÇ À¯È¿ÀÀ·Â °æ·Î°¡ ¹Ì°í°á ¸ð·¡ÀÇ ÀüÀÀ·Â °æ·ÎÂÊÀ¸·Î ÆíÇâµÇ¾î ¹ß»ýÇÏ¿´´Ù. °í°á°áÇÕÀÌ ÆÄ±«µÇ±â Àü¿¡´Â ´ÙÀÏ·¹ÀÌ¼Ç °æÇâÀÌ °¨¼ÒÇÏÁö¸¸, °áÇÕÀÌ ÆÄ±«µÈ ÈÄ¿¡´Â ¹Ì°í°á ¸ð·¡º¸´Ù ´õ Å« ´ÙÀÏ·¹ÀÌ¼Ç °æÇâÀÌ À¯¹ßµÇ¾ú´Ù. |
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| Triaxial tests at isotropic confining pressure of 200 kPa were carried out to show the undrained shear behavior of artificially cemented sands, which were cemented by gypsum, and the influences of relative density and DOC (degree of cementation) were investigated from the results. The yield strength, the elastic secant modulus at yield point and the peak frictional angle of cemented sands increased abruptly compared to uncemented sands, and it was checked that cementation exerts more influence on the behavior of sand than the relative density. But after breakage of the cementation bonds, the relative density was more important factor on the behavior of sand than the cementation. Because the compressibility md the excess pore pressure of cemented sands were reduced due to the cementation bonds, the effective stress path of cemented sands was going toward to the total stress path of uncemented sands. The cementation of sand restricted the dialtion of sand at the pre-yield condition, but induced more dilation in the post-yield condition. |
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| Ű¿öµå |
| Cementation;Compressibility;Degree of cementation;Dilation;Relative density;Undrained shear behavior; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.22, no.4, 2006³â, pp.85-94
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200622219588887)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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