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Çѱ¹Áö¹Ý°øÇÐȸ / v.18, no.2, 2002³â, pp.87-96
ÀÚ°¡±¼Âø½Ä ÇÁ·¹¼Å¹ÌÅÍ ½ÃÇèÀ» ÀÌ¿ëÇÑ Á¡¼ºÅäÀÇ ¾Ð¹ÐƯ¼º »êÁ¤
( Determination of Consolidation Characteristics of Clayey Soils from the Self-boring Pressuremeter Test )
ÀåÀμº;Á¤Ãæ±â;±è¸í¸ð;Á¶¼º¹Î; Çѱ¹Çؾ翬±¸¿ø ¿¬¾ÈÇ׸¸°øÇבּ¸º»ºÎ;¼­¿ï´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;¼­¿ï´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;Çѱ¹µµ·Î°ø»ç ¿¬±¸°³¹ß½Ç;
 
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ÀÚ°¡±¼Âø½Ä ÇÁ·¹¼Å¹ÌÅ͸¦ ÀÌ¿ëÇÑ º¯Çü·ü À¯Áö ½ÃÇèÀº Á¡¼ºÅä Áö¹ÝÀÇ ¼öÆò¹æÇ⠾йаè¼ö¸¦ ÃßÁ¤Çϴµ¥ ÀÖ¾î È¿°úÀûÀ¸·Î »ç¿ëµÇ°í ÀÖ´Ù. Clarkeµî(1979)ÀÌ Á¦½ÃÇÑ ÀϹÝÀûÀÎ ÇØ¼® ¹æ¹ýÀº ¿©·¯ °¡Áö ´Ü¼øÈ­ÇÑ °¡Á¤À¸·Î ÀÎÇØ ¾Ð¹Ð°è¼ö»êÁ¤¿¡ ¹®Á¦Á¡À» ³»Æ÷Çϰí ÀÖ´Ù. µû¶ó¼­, º» ³í¹®¿¡¼­´Â ½ÇÁ¦ ½ÃÇè °úÁ¤ ¹× Á¶°ÇµéÀ» ÃÖ´ëÇÑ ¹Ý¿µÇϱâ À§ÇÏ¿© ÇÁ·¹¼Å¹ÌÅÍ ½ÃÇè±âÀÇ À¯ÇÑÇÑ ±æÀÌ, °èÆÄ½ÃÀÇ ºÎºÐ¹è¼ö, ¼Ò»ê½ÃÇè ½ÃÀÛ½ÃÀÇ °øµ¿ º¯Çü·ü µîÀÇ ¿©·¯ °¡Áö ÇØ¼® Á¶°ÇµéÀÌ Ãʱ⠰úÀ×°£±Ø¼ö¾ÐÀÇ ºÐÆ÷ ¹× ¼Ò»ê °Åµ¿¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» °í·ÁÇÑ À¯ÇÑ¿ä¼ÒÇØ¼®À» ¼öÇàÇÏ¿´´Ù. ±× °á°ú, ¼öÆò¹æÇ⠾йаè¼ö¸¦ ÃßÁ¤Çϴµ¥ ÇÊ¿äÇÑ 50% ¾Ð¹Ðµµ¿¡¼­ÀÇ ½Ã°£°è¼ö¸¦ Á¦¾ÈÇÏ¿´°í, À̸¦ ±¹³» 2°³ ÇöÀå¿¡¼­ ¼öÇàÇÑ º¯Çü·ü À¯Áö½ÃÇè¿¡ Àû¿ëÇÏ¿© ¾Ð¹Ð°è¼ö¸¦ »êÁ¤Çϰí, ´Ù¸¥ ÇöÀå ½ÃÇè ¹× ½Ç³»½ÃÇè °á°ú¿Í ºñ±³.ºÐ¼®ÇÏ¿© ±× Àû¿ë¼ºÀ» È®ÀÎÇÏ¿´´Ù.
The strain holding test(SHT) or the sell-boring pressuremeter test(SBPT) has been effectively utilized to determine the horizontal coefficient of consolidation$(c_h)$ of clayey soils. However, a commonly used procedure proposed by Clarke et al.(1979) can lead to an erroneous estimation of $(c_h)$ because of its simplified assumptions. This paper deals with numerical analyses based on realistic test conditions of the generally accepted testing procedure, and .using the most commonly used type of pressuremeter. The effects of pressuremeter geometry, partial drainage during cavity expansion, and the cavity strain level for the holding test are investigated with the radial distributions of the initial excess pore pressure and their dissipation rate. Based on the results of the numerical analyses, the curve of the time factor for the 50% degree of consolidation($T_{50}$) needed to estimate $(c_h)$ is proposed. Comparisons are made between $(c_h)$ values estimated from the SHT or the SBPT and those obtained from other in situ and laboratory tests performed at two sites in Korea. These results suggest the improved capability of the $T_{50}$ curve proposed herein.
 
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Horizontal coefficient of consolidation$(c_h)$;Numerical analysis;Self-Boring Pressuremeter Test(SBPT);Strain holding test(SBPT);Time factor;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.18, no.2, 2002³â, pp.87-96
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211921044141)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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