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Çѱ¹Áö¹Ý°øÇÐȸ / v.18, no.5, 2002³â, pp.7-18
Á¤±Ô¾Ð¹ÐµÈ À缺Çü À̾ÏdzȭÅäÀÇ ºñ¹è¼ö Àü´ÜƯ¼º
( The Characteristics of Undrained Shear Strength for Normally Consolidated Decomposed Weathered Mudstone Soil )
±è¿µ¼ö;±è±â¿µ;¹®È«µæ; °æºÏ´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;°æºÏ´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;ÁøÁÖ»ê¾÷´ëÇб³ Åä¸ñ°øÇаú;
 
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ÀϹÝÀûÀ¸·Î ÀÚ¿¬»óÅÂÀÇ ÈëÀº ÀÏÂ÷¿ø ¾Ð¹ÐÀ» ¹Þ°í ÀÖÀ¸¹Ç·Î µî¹æ¾Ð¹Ð½Ã·á¿Í´Â ±× °Åµ¿¾ç»óÀÌ »óÀÌÇÏ°Ô ³ªÅ¸³­´Ù. ±×·¯³ª ´ëºÎºÐÀÇ ½Ç³»½ÃÇè¿¡¼­´Â ½ÇÇè»óÀÇ ¾î·Á¿ò°ú ½ÃÇèÀåºñÀÇ ºÎÁ·À¸·Î ÀÎÇÏ¿© ÁÖ·Î µî¹æ½ÃÇèÀ» ÅëÇÑ ¿¬±¸°¡ ½Ç½ÃµÇ°í ÀÖ´Â °ÍÀÌ Çö½ÇÀÌ´Ù. µû¶ó¼­ ºñ±³Àû °£´ÜÇÑ µî¹æ »ïÃà ¾ÐÃà½ÃÇè °á°ú·ÎºÎÅÍ $K_o$»óÅÂÀÇ °£±Ø¼ö¾Ð ¹× ºñ¹è¼ö Àü´Ü°­µµ¸¦ ÃßÁ¤ÇÒ ¼ö ÀÖ´Ù¸é ¸Å¿ì È¿°úÀûÀ̶ó ÇÒ ¼ö ÀÖÀ» °ÍÀÌ´Ù. º» ¿¬±¸¿¡¼­´Â À缺ÇüµÈ À̾ÏdzȭÅ並 ÀÌ¿ëÇÏ¿© µî¹æ»ïÃà¾ÐÃà½ÃÇè°ú $K_o$ »ïÃà¾ÐÃà½ÃÇèÀ» ½Ç½ÃÇϰí, ½Ö°î¼± ¸ðµ¨À» Àû¿ëÇÏ¿© °£±Ø¼ö¾Ðºñ¿¡ °ü·ÃµÈ »ó¼ö¸¦ µµÃâÇÏ¿´´Ù. ±×¸®°í Lo(1969)°¡ Á¦¾ÈÇÑ ½ÄÀ» Àû¿ëÇÏ¿© µî¹æ½ÃÇè¿¡¼­ ¾ò¾îÁø °£±Ø¼ö¾ÐÀÇ °á°ú·ÎºÎÅÍ Ko ½ÃÇè½Ã ¹ß»ýÇÏ´Â °£±Ø¼ö¾ÐÀÇ °Åµ¿À» ¿¹ÃøÇÔÀ¸·Î½á Lo(1969)½ÄÀÇ Å¸´ç¼ºÀ» °ËÅäÇÏ¿´´Ù. ¶ÇÇÑ ¾Ð¹Ð¹æ¹ý¿¡ µû¸¥ ºñ¹è¼ö Àü´Ü°­µµ¸¦ ÇÔ¼öºñ¿Í ¿¬°üÁö¾î »ìÆìº½À¸·Î¼­ ¾Ð¹Ð¹æ¹ýÀÌ Àü´Ü°­µµ¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ÆÄ¾ÇÇÏ¿´´Ù. ³¡À¸·Î ÇѰè»óÅ °³³ä¿¡ ±âÃÊÇÑ Wroth(1984)À» ½ÄÀ» Àû¿ëÇÏ¿© µî¹æ½ÃÇè½ÃÀÇ ºñ¹è¼ö Àü´Ü°­µµ·Î ºÎÅÍ $K_o$ »óÅÂÀÇ ºñ¹è¼ö Àü´Ü°­µµ¸¦ ¿¹ÃøÇÏ°í ±× °á°ú¸¦ ½ÇÇèÄ¡¿Í ºñ±³ÇÔÀ¸·Î¼­ ½ÄÀÇ À¯¿ë¼ºÀ» °ËÁõÇÏ¿´´Ù.
Generally, natural soils are affected by one-dimensional consolidation so that the behavior characteristic could be somewhat different from the isotropic consolidation specimen. But, due to experimental difficulties and the lack of equipment, the isotropic triaxial tests are mainly performed in most lab. tests. So it seems to be very effective if it is possible to predict pore water pressure and undrained shear strength in the $K_o$ state as the results of isotropic triaxial consolidation test. In this study, isotropic triaxial consolidation test and $K_o$ triaxial consolidation test were performed and we obtained parameters related to pore water pressure ratio using the Hyperbolic model. And then we predicted the behavior of pore water pressure that occurred in the $K_o$ state from the results obtained in the isotropic triaxial cosolidation test through the equation suggested by Lo(1969). It is possible to seize the validity of Lo(1969) equation. Also, considering undrained shear strength obtained from consolidation method in relation with water content, we find that consolidation method have an effect on undrained shear strength. Finally, using the Wroth(1984) equation that is based on the theory of critical state, undrained shear strength in the $K_o$ state was predicted from that of the isotropic triaxial consolidation test. The usefulness of the equation was verified by comparing the predicted value with experimental results.
 
Ű¿öµå
Critical-state;Hyperbolic model;Undrained shear strength;Weathered mudstone soil;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.18, no.5, 2002³â, pp.7-18
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211921407677)
¾ð¾î : Çѱ¹¾î
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