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Çѱ¹Áö¹Ý°øÇÐȸ / v.20, no.3, 2004³â, pp.151-159
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°£±Ø¼ö¾Ð ¼Ò»ê°æÇâÀ» °í·ÁÇÑ ÀÚ°¡±¼Âø½Ä ÇÁ·¹¼Å¸ÞÅͷκÎÅÍÀÇ ¼öÆò¾Ð¹Ð°è¼ö °áÁ¤¹ý
( Determination of Horizontal Coefficient of Consolidation from the Self-boring Pressuremeter Holding Test by Considering Pore Pressure Dissipation Trend ) |
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| º» ³í¹®¿¡¼´Â ÀÚ°¡±¼Âø½Ä ÇÁ·¹¼Å¸ÞÅÍ ½ÃÇèÀÇ º¯ÇüÀ» À¯Áö½ÃÇè(strain holding test)¿¡¼ °üÃøµÈ ¼Ò»ê½ÃÇè °á°úÀÇ ÃÊ±â ¼Ò»ê°æÇâÀ¸·ÎºÎÅÍ Á¡¼ºÅä Áö¹ÝÀÇ ¼öÆò¾Ð¹Ð°è¼ö¸¦ ÃßÁ¤Çϱâ À§ÇÑ ÃÖÀûȱâ¹ýÀÇ Àû¿ë¿¡ ´ëÇÏ¿© ±â¼úÇÏ¿´´Ù. ÇÁ·¹¼Å¸ÞÅÍÀÇ È®ÀåÀ¸·Î ÀÎÇÑ Ãʱ⠰úÀ×°£±Ø¼ö¾ÐÀÇ ºÐÆ÷´Â Randolph. £¦ Wroth(1979)ÀÇ ÇØ¼®Àû ÇØ(analytical solution)¸¦ ÀÌ¿ëÇÏ¿© Áö¹ÝÀÇ °¼ºÁö¼öÀÇ ÇÔ¼ö·Î ¸ð»çµÇ¾úÀ¸¸ç ¿¬¼ÓµÈ °£±Ø¼ö¾Ð ¼Ò»ê°úÁ¤±îÁö Àü°úÁ¤ÀÌ ¸ð»çµÇ¾ú´Ù. Á¦¾ÈµÈ ±â¹ý¿¡¼´Â À̸¦ ¼Ò»ê°î¼±°ú Á¤±ÔÈ µÈ °üÃø ¼Ò»ê°î¼±ÀÌ Ãʱâ 50% ¹üÀ§¿¡¼ ¼Ò»ê°æÇâÀÌ °¡Àå ÀÏÄ¡Çϵµ·Ï ÇÏ´Â ¼öÆò¾Ð¹Ð°è¼ö¸¦ ÃÖÀûȱâ¹ýÀ» ÀÌ¿ëÇÏ¿© °áÁ¤ÇÏ¿´´Ù. Á¦¾ÈµÈ ±â¹ýÀ» ±èÁ¦¿Í ¾ç»ê¿¡¼ ¼öÇàµÈ ±âÁ¸ÀÇ ÀÚ°¡±¼Âø½Ä ÇÁ·¹¼Å¸ÞÅÍ ¿¬±¸°á°úÀÇ ÇØ¼®¿¡ Àû¿ëÇÏ¿´À¸¸ç Á¦¾ÈµÈ ¹æ¹ýÀ¸·Î ¾ò¾îÁø ¼öÆò¾Ð¹Ð°è¼ö¸¦ ±âÁ¸ÀÇ ¿¬±¸°á°ú, ½Ç³» ¹× ¿øÀ§Ä¡ ½ÃÇè°á°ú¿Í ºñ±³ÇÏ¿´´Ù. ¿¬±¸°á°ú Á¦¾ÈµÈ ¹æ¹ýÀº ÇÇ¿¡Á¶ÄÜ ¼Ò»ê½ÃÇè°ú ¸Å¿ì Àϰü¼ºÀÖ°Ô ÀÏÄ¡ÇÏ´Â ¼öÆò¾Ð¹Ð°è¼ö¸¦ Á¦°øÇÒ »Ó ¾Æ´Ï¶ó ºÎºÐ¹è¼ö°¡ ¹ß»ýÇÏ´Â ÁöÁ¡¿¡¼µµ °£±Ø¼ö¾Ð ¼Ò»ê°æÇâÀ» ¹Ý¿µÇÔÀ¸·Î ÀÎÇØ º¸´Ù ÀûÀýÇÑ ¼öÆò¾Ð¹Ð°è¼ö¸¦ °áÁ¤ÇÒ ¼ö ÀÖÀ½À» ¾Ë¾Ò´Ù. |
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| This paper describes a systematic way of identifying the horizontal coefficient of consolidation of clayey soil by applying an optimization technique to the early part of dissipation data measured from the self-boring pressuremeter strain holding test. An analytical solution developed by Randolph £¦ Wroth (1979) was implemented in normalized form to express the build-up of excess pore pressures as a function of the rigidity index and subsequent dissipation of excess pore pressures around a pressuremeter Horizontal coefficient of consolidation was determined by minimizing the differences between theoretical and measured excess pore pressure curves over 50% degree of dissipation range using optimization technique. The effectiveness of the proposed back-analysis method was examined against the real fled performances obtained from pressuremeter strain holding tests at Gimje and Yangsan site. It is shown that the proposed back-analysis method can evaluates the rational horizontal coefficient of consolidation, which is similar to those obtained from the piezocone dissipation test. Furthermore, proposed method can evaluate appropriate coefficient of consolidation for soil under partially drained condition. |
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| Ű¿öµå |
| Coefficient of consolidation;Optimization technique;Partial-drainage;Self-boring pressuremeter;Strain holding test; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.20, no.3, 2004³â, pp.151-159
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200411922341698)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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