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Çѱ¹Áö¹Ý°øÇÐȸ / v.25, no.9, 2009³â, pp.57-66
¾ÐÃàÆÄ ¼Óµµ¸¦ ÀÌ¿ëÇÑ Ã¶µµ Åä°ø³ë¹ÝÀÇ Ç°Áú°ü¸® ¹æ¾È : II. Àû¿ë¼º °ËÁõ
( A Methodology for Quality Control of Railroad Trackbed Fills Using Compressional Wave Velocities : II. Verification of Applicability )
¹Úö¼ö;¸ñ¿µÁø;Ȳ¼±±Ù;¹ÚÀιü; Çѱ¹Ã¶µµ±â¼ú¿¬±¸¿ø Â÷·û±Ëµµ¿¬±¸½Ç;°æÈñ´ëÇб³ Åä¸ñ°ÇÃà´ëÇÐ;Çѱ¹Ã¶µµ±â¼ú¿¬±¸¿ø öµµ±¸Á¶¿¬±¸½Ç;°æÈñ´ëÇб³ Åä¸ñ°øÇаú;
 
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¿¹ºñ¿¬±¸(¹Úö¼ö µî, 2009)¸¦ ÅëÇØ öµµ Åä°ø³ë¹Ý¿¡ ´ëÇÑ »õ·Î¿î ǰÁú°ü¸® ÁöÇ¥·Î¼­ ¾ÐÃàÆÄ ¼Óµµ¿Í °èÃø ±â¹ýÀ» Á¦¾ÈÇÏ¿´´Ù. Á¦¾ÈÇϰíÀÚ ÇÏ´Â »õ·Î¿î ǰÁú°ü¸® ¹æ¾ÈÀº ¹Ðµµ¸¦ ÀÌ¿ëÇÑ Ç°Áú°ü¸® °úÁ¤À» µ¿ÀÏÇÏ°Ô µû¶úÀ¸¸ç, ´Ù¸¸ ¹Ðµµ¸¦ ¼³°è´Ü°èÀÇ È¸º¹Åº¼º°è¼ö¿Í °ü·Ã ÀÖ´Â ¾ÐÃàÆÄ ¼Óµµ·Î ´ë½ÅÇÏ¿´´Ù. ÀÌ¿Í ´õºÒ¾î ÇöÀå ÇÔ¼öºñ°¡ ÃÖÀûÇÔ¼öºñÀÇ ${pm}2%$¸¦ ¸¸Á·Çϵµ·Ï º¸¿ÏÇÏ¿´´Ù. º» ¿¬±¸¿¡¼­´Â Á÷Á¢µµ´ÞÆÄ ±â¹ý ¹× ½Ç³» ¾ÐÃàÆÄ °èÃø ¿Ü¿¡ Å©·Î½ºÈ¦ ½ÃÇè°ú °øÁøÁÖ½ÃÇèÀ» Ãß°¡·Î ¼öÇàÇÏ¿©, ¾ÐÃàÆÄ ¼Óµµ¿¡ ±Ù°ÅÇÑ »õ·Î¿î ǰÁú°ü¸® ¹æ¾ÈÀÇ Àû¿ë¼ºÀ» °ËÁõÇÏ¿´´Ù. ÀÀ·ÂÀÌ º¸Á¤µÈ Å©·Î½ºÈ¦ ½ÃÇè°á°ú´Â Á÷Á¢µµ´ÞÆÄ ½ÃÇèÀÇ °á°ú¿Í Àß ÀÏÄ¡ ÇÏ¿´°í, °øÁøÁÖ½ÃÇè °á°ú ¶ÇÇÑ Å©·Î½ºÈ¦ ½ÃÇèÀÇ °á°ú¿Í Àß ÀÏÄ¡ ÇÏ¿´´Ù. ¾ÐÃàÆÄ ¼Óµµ´Â ÀÌ·ÐÀûÀ¸·Î³ª ½Ç¹«Àû °üÁ¡¿¡¼­ öµµ Åä°ø³ë¹ÝÀÇ ¿ì¼öÇÑ Ç°Áú°ü¸® ±âÁØÀÓÀÌ ¹àÇôÁ³´Ù.
In the preliminary investigation (Park et al., 2009), the use of compressional wave velocity and its measurement techniques were proposed as a new quality control measure for trackbed fills. The methodology follows exactly the same procedure as the density control, except the density being replaced by the compressional wave velocity involving consistently with resilient modulus of design stage. The specifications for the control also include field compaction water content of optimum moisture content ${pm}2%$ as well as the compressional wave velocity. In this sequel paper, crosshole and resonant column tests were performed as well direct-arrival method and laboratory compressional wave measurements to verify the practical applicability of a methodology far the new quality control procedure based upon compressional wave velocity. The stress-modified crosshole results reasonably well agree with the direct-arrival values, and the resonant column test results also agree well with the field crosshole results. The compressional wave velocity turned out to be an excellent control measure for trackbed fills both in the theoretical and practical point of view.
 
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Compressional wave velocity;Direct-arrival method;Modified compaction test;Railroad trackbed fills;Quality control;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.25, no.9, 2009³â, pp.57-66
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200934939599700)
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