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Çѱ¹Áö¹Ý°øÇÐȸ / v.24, no.4, 2008³â, pp.79-88
°í¼Óöµµ ÄÜÅ©¸®Æ®±Ëµµ Èë½×±âÀç·áÀÇ Wetting Collapse¿¡ °üÇÑ ¿¬±¸
( Wetting-Induced Collapse in Fill Materials for Concrete Slab Track of High Speed Railway )
À̼ºÁø;ÀÌÀÏÈ­;ÀÓÀº»ó;½Åµ¿ÈÆ;Á¶¼ºÀº; Çѱ¹Ã¶µµ±â¼ú¿¬±¸¿ø ±ËµµÅä¸ñ¿¬±¸º»ºÎ ±Ëµµ³ë¹Ý¿¬±¸ÆÀ;Çѱ¹Ã¶µµ±â¼ú¿¬±¸¿ø ±ËµµÅä¸ñ¿¬±¸º»ºÎ ±Ëµµ³ë¹Ý¿¬±¸ÆÀ;Çѱ¹¼öÀÚ¿ø°ø»ç ¼öÀÚ¿ø¿¬±¸¿ø;Çѱ¹¼öÀÚ¿ø°ø»ç ¼öÀÚ¿ø¿¬±¸¿ø;Çѱ¹¼öÀÚ¿ø°ø»ç ¼öÀÚ¿ø¿¬±¸¿ø;
 
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°í¼Óöµµ´Â 300km/h ÀÌ»óÀÇ °í¼ÓÀ¸·Î ¿îÇàµÇ±â ¶§¹®¿¡ ³ë¹ÝÀÇ ºÎµîħÇÏ´Â Å« »ç°í¸¦ ¾ß±â½Ãų ¼ö ÀÖ¾î ÁÖÀǸ¦ ±â¿ï¿© °ü¸®µÇ¾î¾ß ÇÑ´Ù. ÀϹÝÀûÀ¸·Î ħÇÏ´Â µÎ Ãþ(¼ºÅäü, ÇϺΠ¿øÁö¹Ý)¿¡¼­ ¹ß»ýµÉ ¼ö ÀÖ´Ù. ÀÌ Áß ¿øÁö¹Ý¿¡ ´ëÇÑ ¿¬±¸´Â ¸¹ÀÌ ¼öÇàµÇ¾î ¿ÔÀ¸³ª, ¼ºÅäü ÀÚüÀÇ ¾ÐÃàħÇÏ¿¡ ´ëÇÑ ¿¬±¸´Â ±× Å©±â°¡ »ó´ëÀûÀ¸·Î Å©Áö ¾Ê°í Àå±âÀûÀ¸·Î ¹ß»ýµÇ´Â Ư¼ºÀ¸·Î ¸¹Àº ¿¬±¸°¡ ÀÌ·ç¾îÁö°í ÀÖÁö ¾ÊÀº ½ÇÁ¤ÀÌ´Ù ÇÏÁö¸¸ ÀÜ·ùħÇÏ·®ÀÌ ¾à 30mm±îÁö Çã¿ëµÇ´Â ÄÜÅ©¸®Æ®±ËµµÀÇ °í¼Óöµµ ±¸°£¿¡¼­´Â ÀÌ·Î ÀÎÇÑ ¿µÇâÀº ¹«½ÃÇÒ ¼ö ¾øÀ¸¸ç ÀÌ¿¡ ´ëÇÑ ¿øÀÎ ±Ô¸íÀÌ ÇÊ¿äÇÏ´Ù. ¼ºÅäüÀÇ ¾ÐÃàÀº ´Ù¾çÇÑ ¿øÀο¡ ÀÇÇØ¼­ ¹ß»ýµÉ ¼ö ÀÖÀ» °ÍÀÌ´Ù. ±× Áß¿¡¼­µµ ¼ºÅäü ÀÚüÀÇ Àå±âÀûÀÎ ¾ÐÃàħÇÏÆ¯¼ºÀº °ø»ç ¿Ï·á ÈÄ¿¡ ÁöÇϼöÀ§ »ó½ÂÀ̳ª °­¿ì·Î ÀÎÇÑ ½ÀÀ±È­ °úÁ¤(Wetting)¿¡¼­ Å©°Ô ¹ß»ýµÉ ¼ö ÀÖÀ¸¸ç, ÀÌ´Â 'Hydro Collapse' ¶Ç´Â 'Wetting Collapse'¶ó ÇÒ ¼ö ÀÖ´Ù. ÀÌ·¯ÇÑ Wetting Collpase ¹®Á¦¿¡ ´ëÇÑ ¿¬±¸°¡ ¸¹ÀÌ ÀÌ·ç¾îÁöÁö ¾Ê°í ÀÖÁö¸¸, ÀÌ·Î ÀÎÇÑ ¸ð·¡, ÀÚ°¥, ¾Ï¼® µîÀÇ ´ÙÁü ¼ºÅäüÀÇ ¾ÐÃà¹ß»ýÀº ¿©·¯ ¿¬±¸Àڵ鿡 ÀÇÇØ ÀÎÁöµÇ¾îÁö°í ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â 4°¡Áö Á¾·ùÀÇ Áö¹Ý/¾Ï¼®¿¡ ´ëÇØ ÀÀ·Â¼öÁذú ½ÀÀ±È­ Á¶°Ç µî¿¡ ´ëÇÑ Wetting Collapse ½ÇÇèÀ» ¼öÇàÇÏ¿© ±× ¿µÇâ Á¤µµ¸¦ Æò°¡ÇØ º¸¾Ò´Ù. ´ëÇü ¿ÀÀ̵µ¹ÌÅ͸¦ ÀÌ¿ëÇÏ¿© ½ÇÇèÀ» ¼öÇàÇÏ¿´À¸¸ç, ½ÇÇè°á°ú·Î °¢ Àç·áº° ¼öÁ÷ÀÀ·Â¿¡ µû¶ó ¹ß»ýµÇ´Â ħÇÏ º¯Çü·ü°ú ¼ø¼öÈ÷ Æ÷È­µµ »ó½Â¿¡ µû¸¥ ħÇÏ º¯Çü·üÀ» Æò°¡ÇÒ ¼ö ÀÖ¾ú´Ù.
Recently, the high speed railway comes into the spotlight as the important and convenient traffic infrastructure. In Korea, Kyung-Bu high speed train service began in bout 400 km section in 2004, and the Ho-Nam high speed railway will be constructed by 2017. The high speed train will run with a design maximum speed of 300-350 km/hr. Since the trains are operated at high speed, the differential settlement of subgrade under the rail is able to cause a fatal disaster. Therefore, the differential settlement of the embankment must be controlled with the greatest care. Furthermore, the characteristics and causes of settlements which occurred under construction and post-construction should be investigated. A considerable number of studies have been conducted on the settlement of the natural ground over the past several decades. But little attention has been given to the compression settlement of the embankment. The long-term settlement of compacted fills embankments is greatly influenced by the post-construction wetting. This is called 'hydro collapse' or 'wetting collapse'. In spite of little study for this wetting collapse problem, it has been recognized that the compressibility of compacted sands, gravels and rockfills exhibit low compressibility at low pressures, but there can be significant compression at high pressures due to grain crushing (Marachi et al. 1969, Nobari and Duncan 1972, Noorany et al. 1994, Houston et al. 1993, Wu 2004). The characteristics of compression of fill materials depend on a number of factors such as soil/rock type, as-compacted moisture, density, stress level and wetting condition. Because of the complexity of these factors, it is not easy to predict quantitatively the amount of compression without extensive tests. Therefore, in this research I carried out the wetting collapse tests, focusing on various soil/rock type, stress levels, wetting condition more closely.
 
Ű¿öµå
Embankment;High speed railway slab track;Odometer test;Rockfill;Wetting-collapse;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.24, no.4, 2008³â, pp.79-88
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200821036726103)
¾ð¾î : Çѱ¹¾î
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