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Çѱ¹µµ·ÎÇÐȸ / v.12, no.4, 2010³â, pp.39-46
¾ÆÀÌ¿À¿Í ÁÖ ±³Åë±¹ÀÇ FWD ³×Æ®¿öÅ© ·¹º§ Á¶»ç ÇÁ·ÎÅäÄÝÀ» À§ÇÑ ÃÖ¼Ò ÇÏÁß ÀçÇÏ ¼ö¿Í Á¶»çÁöÁ¡ ¼öÀÇ °áÁ¤
( Investigation of Minimum Number of Drop Levels and Test Points for FWD Network-Level Testing Protocol in Iowa Department of Transportation )
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2007³âºÎÅÍ ¾ÆÀÌ¿À¿Í ÁÖ ±³Åë±¹¿¡¼­´Â °í¼Óµµ·Î¿Í ±¹µµ¿¡¼­ FWD Àåºñ¸¦ ÀÌ¿ëÇÏ¿© ³×Æ®¿öÅ© ·¹º§¿¡ ÇÊ¿äÇÑ Á¶»ç¸¦ ½Ç½ÃÇÏ¿´°í óÁü ÀÚ·á¿Í Æ÷Àå ±¸Á¶ºÐ¼® °á°ú¸¦ µ¥ÀÌÅͺ£À̽º·Î ±¸ÃàÇÏ´Â ÀÛ¾÷À» ½ÃÀÛÇÏ¿´´Ù. ÃàÀûµÈ µ¥ÀÌÅͺ£À̽º¿¡ Á¤º¸´Â Æ÷Àå¿¡ ±¸Á¶Àû ¹®Á¦Á¡À» ¹ß°ßÇÏ°í Æ÷Àå¿¡ ÀÜ·ù °ø¿ë¼ö¸íÀ» ¿¹ÃøÇÏ¿© Æ÷Àå¿¡ À¯Áöº¸¼ö ½ÃÁ¡À» °áÁ¤Çϴµ¥ »ç¿ëÇÑ´Ù. ÇöÀç ¾ÆÀÌ¿À¿Í ÁÖ ±³Åë±¹¿¡¼­ »ç¿ëÇϰí ÀÖ´Â FWD ³×Æ®¿öÅ© ·¹º§ Á¶»ç ÇÁ·ÎÅäÄÝÀº Æ÷Àå Ç¥¸é¿¡ 3¹ø¿¡ ÇÏÁßÀ» °¢°¢ ÀçÇÏÇÏ¿© 8°³¿¡ Áö¿ÀÆùÀ¸·ÎºÎÅÍ ÃøÁ¤ÇÑ Ã³Áü·®À» ÀÌ¿ë, ¿ª °è»êÀ» ÅëÇØ Æ÷À屸Á¶ ÇØ¼®À» ¼öÇàÇϰí ÀÖÀ¸¸ç Á¶»çÁöÁ¡ ¼ö´Â Á¶»çÇÏ´Â µµ·ÎÀÇ ±¸°£ ±æÀÌ¿¡ µû¶ó °áÁ¤Çϰí ÀÖ´Ù. ±×·¯³ª, ÇöÀç »ç¿ëÇϰí ÀÖÀº FWD ³×Æ®¿öÅ© ·¹º§ Á¶»ç ÇÁ·ÎÅäÄÝÀº 1³â µ¿¾È ¾ÆÀÌ¿À¿Í ÁÖ Àüü µµ·Î ³×Æ®¿öÅ©¿¡ ¾à 20%¸¸À» Á¶»çÇÒ ¼ö ÀÖ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. µû¶ó¼­, ÇØ¸¶´Ù ¾ÆÀÌ¿À¿Í ÁÖ µµ·Î ³×Æ®¿öÅ©¿¡ 20% ÀÌ»óÀ» Á¶»çÇϱâ À§Çؼ­´Â ÇöÀç »ç¿ëÇϰí ÀÖ´Â FWD ³×Æ®¿öÅ© ·¹º§ Á¶»ç ÇÁ·ÎÅäÄÝÀ» °£¼ÒÈ­ÇØ¾ß ÇÒ Çʿ䰡 ÀÖ´Ù. º» ¿¬±¸¿¡ ¸ñÀûÀº ÇöÀç »ç¿ëÇϰí ÀÖ´Â FWD ³×Æ®¿öÅ© ·¹º§ Á¶»ç ÇÁ·ÎÅäÄÝ¿¡¼­ FWD ÃøÁ¤ µ¥ÀÌÅÍ¿¡ ¿µÇâÀ» ¹ÌÄ¡Áö ¾Ê´Â ¹üÀ§³»¿¡¼­ ÃÖ¼Ò ÇÏÁß ÀçÇÏ ¼ö¿Í Á¶»çÁöÁ¡ ¼ö¸¦ °áÁ¤Çϱâ À§ÇÑ °ÍÀÌ´Ù. 83°³¿¡ ÇÕ¼ºÆ÷Àå ±¸°£À» ´ë»óÀ¸·Î ÃøÁ¤ÇÑ FWD ³×Æ®¿öÅ© ·¹º§ Á¶»ç¿¡¼­´Â FWD ³×Æ®¿öÅ© ·¹º§ Á¶»ç ÇÁ·ÎÅäÄÝ¿¡¼­ ÇÏÁß ÀçÇÏ ¼ö¿Í Á¶»çÁöÁ¡ ¼ö¸¦ ÁÙ¿©µµ Æ÷Àå ±¸Á¶Çؼ® °á°ú¿¡´Â Å©°Ô ¿µÇâÀ» ¹ÌÄ¡Áö ¾Ê´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. °£¼ÒÈ­µÈ FWD ³×Æ®¿öÅ© ·¹º§ Á¶»ç ÇÁ·ÎÅäÄÝÀº FWD ÃøÁ¤ °á°ú¿¡ ¿µÇâÀ» ¹ÌÄ¡Áö ¾ÊÀ¸¸é¼­ ÃøÁ¤ Á¶»çÀ²À» ³ôÀÏ ¼ö ÀÖÀ» »Ó¸¸ ¾Æ´Ï¶ó ±³Åë ÅëÁ¦·Î ÀÎÇÑ °£Á¢ºñ¿ëµµ Àý°¨½Ãų ¼ö ÀÖÀ» °ÍÀ¸·Î ±â´ëÇϰí ÀÖ´Ù.
In 2007, Iowa department of transportation (DOT) initiated to run the falling weight deflectometer (FWD) network-level testing along Iowa highway and road systems and to build a comprehensive database of deflection data and subsequent structural analysis, which are used for detecting pavement structure failure, estimating expected life, and calculating overlay requirements over a desired design life. Iowa's current FWD networklevel testing protocol requires that pavements are tested at three-drop level with 8-deflection basin collected at each drop level. The test point is determined by the length of the tested pavement section. However, the current FWD network-level program could cover about 20% of Iowa's highway and road systems annually. Therefore, the current FWD network-level test protocol should be simplified to test more than 20% of Iowa's highway and road systems for the network-level test annually. The main objective of this research is to investigate if the minimum number of drop levels and test points could be reduced to increase the testing production rate and reduce the cost of testing and traffic control without sacrificing the quality of the FWD data. Based upon the limited FWD network-level test data of eighty-three composite pavement sections, there was no significant difference between the mean values of three different response parameters when the number of drop levels and test points were reduced from the current FWD network-level testing protocol. As a result, the production rate of FWD tests would increase and the cost of testing and traffic control would be decreased without sacrificing the quality of the FWD data.
 
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.12, no.4, 2010³â, pp.39-46
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ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201014654457722)
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