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Çѱ¹Áö¹Ý°øÇÐȸ / v.22, no.12, 2006³â, pp.67-76
°üÀÔÇü ÇöÀå Àü´ÜÆÄ ÃøÁ¤ÀåÄ¡ÀÇ °³¹ß ¹× Àû¿ë
( Development and Application of Penetration Type Field Shear Wave Apparatus )
ÀÌÁ¾¼·;ÀÌâȣ;À±Çü±¸;ÀÌ¿ìÁø;±èÇü¼·; °í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;°í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;°í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;°í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;»ï¼º¹°»ê °Ç¼³ºÎ¹®, ºÎ»ê½ÅÇ× ºÏÄÁ 2´Ü°è ÇöÀå;
 
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Áؼ³ ¸Å¸³µÈ ¿¬¾àÁö¹ÝÀ̳ª ÇØ¼º Á¡ÅäÀÇ Àü´Ü°­¼º Æò°¡´Â ½Ã·á ±³¶õÀÇ ¿µÇâÀ¸·Î ¸¹Àº ¾î·Á¿òÀÌ ÀÖ´Ù. º» ¿¬±¸´Â ±âÁ¸ÀÇ ÇöÀå Àü´ÜÆÄ ½ÃÇèµéÀÇ ¸î°¡Áö Á¦¾à Á¶°ÇÀ» ±Øº¹ÇÑ »õ·Î¿î ÇöÀå Àü´ÜÆÄ ½ÃÇè ÀåÄ¡¸¦ °³¹ßÇϰí Àû¿ë¼º¿¡ ´ëÇÏ¿© ±â¼úÇÑ °ÍÀÌ´Ù. ÀåÄ¡ ¼³°è °í·Á»çÇ×Àº ±³¶õÈ¿°ú, Æ®·£¼­µà¼­ °£ÀÇ Àü±âÀû °£¼·, ÄÉÀÌºí »çÀÌÀÇ ÀüÀÚ±â Ä¿Çøµ, ÀÚüÀ½Çâ Â÷´Ü, Àü´ÜÆÄÀÇ À̵¿ °£°Ý À¯Áö, Æ®·£¼­µà¼­ÀÇ È¸Àü, ÇÁ·¹ÀÓ(frame)À» ÅëÇÑ ÆÄÀÇ Á÷Á¢Àû Àü´Þ, ±×¸®°í Æ®·£¼­µà¼­¿Í ÄÉÀ̺íÀÇ º¸È£¸¦ Æ÷ÇÔÇÑ´Ù. ÀÌµé °í·Á»çÇ×Àº ÇöÀå°ú ½Ç³»½ÇÇèÀ» ÅëÇÏ¿© Áö¼ÓÀûÀ¸·Î °³¼±µÇ¾ú´Ù. ÇöÀå Àü´ÜÆÄ ¼Óµµ´Â, ¾î¶°ÇÑ ¿ª»ê±â¹ý ¾øÀÌ, Àü´ÜÆÄÀÇ À̵¿°Å¸®¿Í À̵¿½Ã°£À¸·ÎºÎÅÍ Á÷Á¢ °è»êµÇ¾ú´Ù °³¹ßµÈ ÇöÀå Àü´ÜÆÄ ÇÁ·Îºê´Â ±íÀÌ 30m±îÁö Àû¿ëµÇ¾ú´Ù. ½ÇÇè°á°ú ÇöÀå Àü´ÜÆÄ ÇÁ·Îºê¸¦ ÀÌ¿ëÇÏ¿© ¸ð·¡¿Í Á¡ÅäÁö¹Ý¿¡¼­ ¸Å¿ì ¼¼¹ÐÇÑ Àü´ÜÆÄ ÇÁ·ÎÆÄÀÏÀ» »êÁ¤ÇÒ ¼ö ÀÖ¾ú´Ù. ¶ÇÇÑ ½ÇÇèºÎÁö¿¡¼­ ¼öÇàµÈ ÄܰüÀÔ½ÇÇè°á°ú¿Íµµ ÁÁÀº »ó°ü°ü°è¸¦ ³ªÅ¸³»¾ú´Ù. º» ³í¹®¿¡¼­ Á¦½ÃµÈ ÇöÀå Àü´ÜÆÄ ÇÁ·Îºê´Â ¿¬¾àÁö¹ÝÀÇ µ¿Àû Ư¼º Æò°¡¸¦ À§ÇÑ ÇöÀå Àü´ÜÆÄ ¼Óµµ ÃøÁ¤¿¡ ¸Å¿ì È¿°úÀûÀÎ ÀåÄ¡ÀÓ º¸¿©ÁØ´Ù.
The reasonable assessment of the shear stiffness of a dredged soft ground and soft clay is difficult due to the soil disturbance. This study addresses the development and application of a new in-situ shear wave measuring apparatus (field velocity probe: FVP), which overcomes several of the limitations of conventional methods. Design concerns of this new apparatus include the disturbance of soils, cross-talking between transducers, electromagnetic coupling between cables, self acoustic insulation, the constant travel distance of S-wave, the rotation of the transducer, directly transmitted wave through a frame from transducer to transducer, and protection of the transducer and the cable. These concerns are effectively eliminated by continuous improvements through performing field and laboratory tests. The shear wave velocity of the FVP is simply calculated, without any inversion process, by using the travel distance and the first arrival time. The developed FVP Is tested in soil up to 30m in depth. The experimental results show that the FVP can produce every detailed shear wave velocity profiles in sand and clay layers. In addition, the shear wave velocity at the tested site correlates well with the cone tip resistance. This study suggests that the FVP may be an effective technique for measuring the shear wave velocity in the field to assess dynamic soil properties in soft ground.
 
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Bender elements;Cross-talking;In-situ test;Shear waves;Soft clay;Transducer;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.22, no.12, 2006³â, pp.67-76
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200606141803746)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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