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Çѱ¹Áö¹Ý°øÇÐȸ / v.25, no.5, 2009³â, pp.5-16
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¹Ì¼Òº¯Çü Àü´ÜÆÄ ¼Óµµ¸¦ °í·ÁÇÑ ¼³Çà¾Ð¹ÐÇÏÁß »êÁ¤
( Evaluation of Preconsolidation Stress Considering Small-Strain Shear Wave Velocity ) |
| À±Çü±¸;ÀÌâȣ;±èÁØÇÑ;ÀÌÁ¾¼·; °í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇкÎ;Á¶Áö¾Æ°ø´ë Åä¸ñȯ°æ°øÇаú;°í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇкÎ;°í·Á´ëÇб³ °ÇÃà.»çȸȯ°æ°øÇкÎ;
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| Æ÷ÈµÈ ¿¬¾àÁö¹ÝÀÇ °Åµ¿ Ư¼ºÀº ¼±Çà¾Ð¹ÐÇÏÁßÀ» ±âÁ¡À¸·Î ´Ù¾çÇÏ°Ô º¯Çϱ⠶§¹®¿¡ Á¤È®ÇÑ ¼±Çà¾Ð¹ÐÇÏÁß »êÁ¤Àº ¿¬¾àÁö¹Ý Æò°¡½Ã »ó´çÈ÷ Áß¿äÇÑ ¼³°èÁ¤¼ö ÀÌ´Ù. ¼±Çà¾Ð¹ÐÇÏÁß Æò°¡¸¦ À§ÇÑ ±âÁ¸ ¹æ¹ýµéÀº ÇÏÁß¿¡ µû¸¥ ħÇÏ·®¸¸À» »êÁ¤ÇÒ »Ó ÀÔÀÚÀÇ ¹Ì¼Òº¯Çü °Åµ¿¿¡ µû¸¥ ÀÔÀÚ ÀÚüÀÇ Æ¯¼ºÀº °í·ÁµÇÁö ¾Ê¾Ò´Ù º» ³í¹®ÀÇ ¸ñÀûÀº ÀÔÀÚÀÇ ¹Ì¼Òº¯Çü °Åµ¿ Ư¼ºÀ» ¹Ý¿µÇÑ Àü´ÜÆÄ ¼Óµµ¸¦ ÀÌ¿ëÇÏ¿© ¼±Çà¾Ð¹ÐÇÏÁßÀ» »êÁ¤Çϱâ À§ÇÑ ¹æ¹ýÀ» Á¦¾ÈÇÏ°í °ËÁõÇÏ´Â °ÍÀÌ´Ù. º» ¿¬±¸¿¡¼´Â ºÎ»ê, ÀÎõ, ±¤¾ç Áö¿ª¿¡¼ äÃëµÈ ºñ±³¶õ ½Ã·á¸¦ ÀÌ¿ëÇÏ¿´´Ù. Ⱦ¹æÇâ ±¸¼Ó($K_0$ Á¶°Ç)ÇÏ¿¡¼ Ãà ÇÏÁßÀ» Áõ°¡ ½Ã۸ç Àü´ÜÆÄ ¼Óµµ¸¦ ÃøÁ¤ ÇÒ ¼ö ÀÖ´Â º¥´õ ¿¤¸®¸ÕÆ®°¡ ¼³Ä¡µÈ ¾Ð¹Ð ¼¿À» ÀÌ¿ëÇÏ¿´´Ù. ¼±Çà¾Ð¹ÐÇÏÁßÀº ±âÁ¸¿¡ ³Î¸® »ç¿ëµÇ°í ÀÖ´Â Casagrande (e-log p') ¹æ¹ý, Sridharan (log (1+e)-log p') ¹æ¹ý, ±×¸®°í Onitsuka (In(1+e)-log p') ¹æ¹ýÀ¸·Î »êÁ¤ÇÏ¿© º» ³í¹®¿¡¼ Á¦½ÃµÈ ¹æ¹ýÀ¸·Î »êÁ¤µÈ ¼±Çà¾Ð¹ÐÇÏÁß°ú ºñ±³ÇÏ¿´´Ù. º» ¿¬±¸´Â Àü´ÜÆÄ ¼Óµµ¸¦ ÀÌ¿ëÇÏ¿© ¼±Çà¾Ð¹ÐÇÏÁßÀ» Æò°¡ ÇÒ ¼ö ÀÖ´Â »õ·Î¿î ¹æ¹ýÀ» Á¦¾ÈÇÏ¿´À¸¸ç, ÀÌ´Â ¹Ì¼Òº¯Çü °Åµ¿ Ư¼ºÀ» °í·ÁÇÑ »õ·Î¿î ¹æ¹ýÀ¸·Î Àû¿ëµÇ±â¸¦ ±â´ëÇÑ´Ù. |
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| Preconsolidation stress is one of the important design parameters in soft soils because the behavior of saturated soft soils changes dramatically at the preconsolidation stress. For the estimation of preconsolidation stress, the global vertical settlement without considering micro strain behavior has been considered. The purpose of this study is to propose and verify a new method called the "shear wave velocity method" for determination of the preconsolidation stress reflecting on particle behavior at the small-strain. In this study, the undisturbed soft soils obtained at Busan, Incheon and Gwangyang in Korea were used. The oedometer cell incoporated with the bender elements is used for the consolidation tests under the $K_0$ condition. The preconsolidation stress determined by the proposed method is compared with that estimated by Casagrande (e-log p'), Sridharan (log (1+e)-log p'), and Onitsuka (In(1+e)-log p') methods. This study suggests that the shear wave velocity method may determine simply the preconsolidation stress with considering the small-strain behavior. |
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| Ű¿öµå |
| Bender element;Consolidation;Preconsolidation stress;Shear wave velocity;Small strain; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.25, no.5, 2009³â, pp.5-16
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200921140046724)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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