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Çѱ¹µµ·ÎÇÐȸ / v.8, no.4, 2006³â, pp.115-124
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Falling Weight Deflectometer óÁü°ªÀ» ÀÌ¿èÇÑ ¾Æ½ºÆÈÆ® Æ÷ÀåüÀÇ ±¸Á¶Àû »óÅ Æò°¡±â¹ý °³¹ß
( Development of the Structural Condition Evaluation Technique for Asphalt Pavements Using Falling Weight Deflectometer Deflections ) |
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| º» ³í¹®ÀÇ ¸ñÀûÀº Falling Weight Deflectometer óÁü°ªÀ» ÀÌ¿ëÇÏ¿© ¾Æ½ºÆÈÆ® Æ÷ÀåüÀÇ ±¸Á¶Àû »óÅ Æò°¡±â¹ýÀ» °³¹ßÇϰí, À̸¦ ÀÌ¿ëÇÏ¿© Æ÷Àåü °¢ ÃþÀÇ ±¸Á¶Àû »óÅ Æò°¡±âÁØÀ» Á¦½ÃÇÔ¿¡ ÀÖ´Ù. À¯ÇÑ¿ä¼ÒÇØ¼® ¾Æ½ºÆÈÆ® Æ÷Àåü ±¸Á¶Çؼ® ÇÁ·Î±×·¥À» ÀÌ¿ëÇÏ¿© °¡»óÀû µ¥ÀÌÅͺ£À̽º¸¦ ±¸ÃàÇÏ¿© Æ÷ÀåüÀÇ Ç¥¸éóÁü°ª°ú Æ÷Àåü ³»ºÎ¹ÝÀÀ°úÀÇ »ó°ü°ü°è¸¦ µµÃâÇÏ¿´´Ù. FWD óÁü°ª°ú Æ÷Àåü µÎ²²¸¦ ÀÌ¿ëÇÏ¿© Á÷Á¢ÀûÀ¸·Î Æ÷Àåü ³»ºÎ¹ÝÀÀÀ» °è»êÇÒ ¼ö ÀÖ´Â ¾Æ½ºÆÈÆ® Æ÷ÀåüÀÇ ³»ºÎ¹ÝÀÀ ¸ðµ¨À» Åë°èÀû ȸ±ÍºÐ¼®À» ÅëÇÏ¿© °³¹ßÇÏ¿´´Ù. °³¹ßµÈ ¹ÝÀÀ¸ðµ¨À» Åä´ë·Î ¾Æ½ºÆÈÆ® Æ÷Àåü °¢ ÃþÀÇ ±¸Á¶Àû »óŸ¦ Æò°¡Çϱâ À§ÇÑ ÀýÂ÷¸¦ Á¦½ÃÇÏ¿´´Ù. º» ¿¬±¸¿¡¼ Á¦½ÃÇÑ Æò°¡ ÀýÂ÷¸¦ °ËÁõÇϱâ À§ÇÏ¿© ±¹µµ 11°³¿Í Áö¹æµµ 8°³ ³ë¼±¿¡¼ FWD¿Í µ¿Àû°üÀÔ½ÃÇèÀ» ¼öÇàÇÏ¿´À¸¸ç, ÇöÀå¿¡¼ äÃëÇÑ ÄÚ¾î´Â ¾Æ½ºÆÈÆ® ½ÃÆíÀÇ »ïÃà¾ÐÃà¹Ýº¹ÀçÇϽÃÇèÀ» ¼öÇàÇÏ¿´´Ù. ¿¬±¸°á°ú, ¾Æ½ºÆÈÆ®ÃþÀÇ °æ¿ì ¾Æ½ºÆÈÆ®Ãþ ÇϺÎÀÇ ÀÎÀ庯Çü·ü°ª°ú ȸº¹Åº¼º°è¼ö°ªÀÌ ¾Æ½ºÆÈÆ® ÃþÀÇ °¼º Ư¼ºÀ» Æò°¡ÇÏ´Â Áß¿äÇÑ ÀÎÀÚ·Î ÆÇ´ÜµÇ¾ú´Ù. º¸Á¶±âÃþ¿¡¼´Â BDI°ª°ú º¸Á¶±âÃþ »óºÎÀÇ ¾ÐÃຯÇü·üÀÌ º¸Á¶±âÃþÀÇ ÁöÁö·Â Æò°¡¿¡ ÀûÇÕÇÏ¿´À¸¸ç, ÇϺÎÃþÀÇ °æ¿ì BCI°ª°ú ÇϺÎÃþ »óºÎÀÇ ¾ÐÃຯÇü·ü°ªÀÌ ³ë»óÅäÀÇ ÁöÁö·Â ¹× »óŸ¦ ÆÇ´ÜÇϴµ¥ ÀûÀýÇÑ ÀÎÀÚ·Î ¼±Á¤µÇ¾ú´Ù. ¾Æ½ºÆÈÆ®Ãþ°ú º¸Á¶±âÃþÀº 3´Ü°è, ÇϺÎÃþÀº 2´Ü°è·Î ±¸ºÐÇÏ¿© ¾Æ½ºÆÈÆ® Æ÷ÀåüÀÇ ±¸Á¶Àû »óŸ¦ Æò°¡ ÇÒ ¼ö ÀÖ´Â ±âÁØÀ» Á¦½ÃÇÏ¿´´Ù. |
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| The objectives of this paper are to develop the structural condition evaluation technique using Falling Weight Deflectometer deflections and propose the structural condition criteria for asphalt pavements. To figure out correlation between surface deflections and critical pavement responses, the synthetic database has been established using the finite element pavement structural analysis program. A regression approach was adopted to develop the pavement response model that can be used to compute the stresses and strains within pavement structure using the FWD deflections. Based on the pavement response model, the procedure for assessing the structural condition of pavement layers was proposed in this study. To validate the condition evaluation procedure for asphalt pavements, the FWD test, dynamic cone penetrometer test, and repeated triaxial compression test were conducted on 11 sections of national highway and 8 sections of local road. Test results indicate that the tensile strain at the bottom of AC layer and AC elastic modulus were good indicators for estimating the stiffness characteristics of AC layer. For subbase layer, the BDI value and compressive strain on top of the subbase layer were appropriate to predict the structural capacity of subbase layer. The BCI value and compressive strain on top of the subgrade were found to be good indicators for evaluating the structural condition of the subgrade. The evaluation criteria for structural condition in asphalt pavements was also proposed in this paper. |
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| ±¸Á¶Àû »óÅÂÆò°¡±â¹ý;Æ÷Àåü ³»ºÎ¹ÝÀÀ ¸ðµ¨;falling weight deflectometer;structural condition evaluation technique;pavement response model; |
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Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.8, no.4, 2006³â, pp.115-124
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200606140741238)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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