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Çѱ¹Áö¹Ý°øÇÐȸ / v.21, no.9, 2005³â, pp.5-12
Ç¥ÁذüÀÔ ½ÃÇè ÇØ¸ÓÀÇ ¿¡³ÊÁöºñ¿Í µ¿ÀûÈ¿À²
( Ratio of Hammer Energy and Dynamic Efficiency of Standard Penetration Test )
ÀÌâȣ;ÀÌ¿ìÁø; °í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;°í·Á´ëÇб³ »çȸȯ°æ½Ã½ºÅÛ°øÇаú;
 
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ÇØ¸Ó¿¡ ÀÇÇØ ¹ß»ýÇÑ ¿¡³ÊÁö¿Í ±×ÀÇ Àü´ÞÀº Ç¥ÁذüÀÔ½ÃÇèÀÇ NÄ¡¿¡ ¿µÇâÀ» ÁÖ¸ç ÀÌ·¯ÇÑ SPTÇØ¸Ó¿¡³ÊÁö´Â ÀÌ·ÐÀû ¿¡³ÊÁö, ¼Óµµ ¿¡³ÊÁö, ·Ôµå ¿¡³ÊÁö, ±×¸®°í µ¿ÀûÈ¿À² µîÀ¸·Î ³ª´©¾îÁø´Ù. º» ¿¬±¸¿¡¼­´Â Çן ºÐ¼®±â(Pile Driving Analyzer, PDA)¿Í µðÁöÅÐ ¶óÀÎ-½ºÄµÄ«¸Þ¶ó(Digital Line-Scan Camera)¸¦ ÀÌ¿ëÇÏ¿© ±¹³»¿¡¼­ ³Î¸® »ç¿ë ÁßÀÎ ½ÃÇè Àåºñµé¿¡ ´ëÇØ ·Ôµå ¿¡³ÊÁö¿Í ¼Óµµ¿¡³ÊÁö¸¦ Á÷Á¢ ÃøÁ¤ÇÏ¿© °¢ ½ÃÇè ÀåºñÀÇ µ¿ÀûÈ¿À²(Dynamic efficiency)À» °è»êÇÏ¿´´Ù. ½ÃÇè °á°ú FV ¹æ¹ý¿¡ ÀÇÇØ »êÁ¤µÈ °¢ ÀåºñÀÇ Æò±Õ ·Ôµå ¿¡³ÊÁö Àü´ÞÀ²Àº µµ³ÓÇØ¸Ó, ¾ÈÀüÇØ¸Ó, ÀÚµ¿ÇظÓÀÇ °æ¿ì °¢°¢ 49.57, 61.60, $87.04%$·Î ÃøÁ¤µÇ¾ú´Ù. ÇØ¸ÓÀÇ Å¸°ÝÁ÷ÀüÀÇ ¹ÚÇÏ ¼Óµµ´Â µµ³ÓÇØ¸Ó, ¾ÈÀüÇØ¸Ó, ÀÚµ¿ÇظÓÀÇ °æ¿ì °¢°¢ $3.177{pm}0.872$, $3.385{pm}0.681$, $3.651{pm}0.550$ m/s·Î ÃøÁ¤µÇ¾ú°í ÀÌ¿¡ µû¶ó µ¿Àû È¿À²Àº °¢°¢ 0.732, 0.801, 0.973À¸·Î °è»êµÇ¾ú´Ù.
SPT hammer energy and its delivery are hon to influence the N value. The SPT hammer energy is classified into theoretical energy, velocity energy, rod energy and dynamic efficiency. In this study, the rod energy and the velocity energy are measured directly by PDA and Digital Line-Scan Camera which are most widely used type of SPT apparatus in Korea. The Dynamic efficiency is calculated through measured data. As the results of this study, the averages of rod energy ratio of donut, safety and automatic hammer are measured at 49.57, 61.60, and at $87.04%$ by FV method. The averages of hammer velocity of donut, safety and automatic hammer are measured at $3.177{pm}0.872$, $3.385{pm}0.681$, and at $3.651{pm}0.550$ m/s by Digital Line-Scan Camera, with the dynamic efficiencies at 0.732, 0.801, and 0.973 respectively.
 
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Digital line-scan camera;Dynamic efficiency;PDA;SPT hammer energy;Standard penetration test;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.21, no.9, 2005³â, pp.5-12
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200508824125250)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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