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Çѱ¹µµ·ÎÇÐȸ / v.12, no.2, 2010³â, pp.71-79
½Ç³»µ¿°á½Ã½ºÅÛÀ» ÀÌ¿ëÇÑ ³ë»óÅäÀÇ µ¿»ó Ư¼º
( The Frost Heaving Characteristics of Subgrade Soils Using Laboratory Freezing System )
½ÅÀºÃ¶;·ùº´Çö;¹ÚÁ¤ÁØ; ÀÎõ´ëÇб³ °Ç¼³È¯°æ°øÇаú;ÀÎõ´ëÇб³ °Ç¼³È¯°æ°øÇаú;ÀÎõ´ëÇб³ °Ç¼³È¯°æ°øÇаú;
 
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°Ü¿ï¿¡´Â ½Ãº£¸®¾Æ±â´ÜÀÇ ¿µÇâÀ¸·Î ÇÑ·© °ÇÁ¶ÇÑ ´ë·ú¼º °í±â¾ÐÀÇ ¿µÇâÀ» ¹Þ¾Æ Ãä°í °ÇÁ¶ÇÏ¿© 1¿ù Æò±Õ±â¿ÂÀÌ $-6{sim}-7^{circ}C$ÀÇ ¿µÇÏÀÇ ¿Âµµ·Î ³·¾ÆÁ® Áö¹Ýµ¿°á½Ã ¼öºÐÀ̵¿À¸·Î µ¿»óÇö»óÀÌ ¹ß»ýÇÏ¿© µµ·ÎÀÇ ºÒ±ÕÇü µ¿°áÆØÃ¢À» ÃÊ·¡Çϸç, °á±¹ Æ÷Àåü¸¦ ÆÄ¼Õ½ÃŲ´Ù. µ¿»ó¹ß»ý½Ã Å丳ÀÚ´Â ¸ð°ü·Â¿¡ ÀÇÇØ ÁöÇϼö¸¦ Èí¼öÇÏ¿© ¾ÆÀ̽º·»Á Çü¼ºÇϸç, ÀÌ ¸ð°ü Èí¼ö·ÂÀº Å丳ÀÚÀÇ Å©±â¿¡ ¿µÇâÀ» ¹Þ´Â´Ù. µµ·Î´Â ´Ù¾çÇÑ Àç·á¿Í ´Ü¸éÀ¸·Î ±¸¼ºµÈ ±¸Á¶¹°À̱⠶§¹®¿¡ ȯ°æ¼º°ú Àç·á ¹°¼º»Ó¸¸ ¾Æ´Ï¶ó Æ÷Àåü °¢ ÃþÀÇ ±¸Á¶Àû ÀûÁ¤¼º ¶Ç´Â ÁöÁö·ÂÀ» ÆÄ¾ÇÇÏ´Â °ÍÀÌ ¹«¾ùº¸´Ù Áß¿äÇÏ´Ù. ÇöÀç ±âÁ¸ µ¿»ó¹æÁöÃþ ¼³°è¹ý¿¡ µû¸£¸é, µ¿»ó¹æÁöÃþÀº Æ÷ÀåüÀÇ ±¸Á¶Àû ÀûÁ¤¼º°ú´Â ¹«°üÇÏ°Ô ¿Âµµ Á¶°Ç¿¡ µû¸¥ µ¿°á±íÀÌ¿¡ µû¶ó ÀÏ·üÀûÀ¸·Î °áÁ¤µÇ°í ÀÖ´Ù. ÀÌ·¯ÇÑ µ¿°á±íÀ̸¦ Æ÷À屸Á¶¼³°è¿¡ Àû¿ëÇÔÀ¸·Î½á Æ÷ÀåÀÇ °ú´Ù¼³°è ¿ì·Á°¡ ÀÖ´Ù. µû¶ó¼­ º» ³í¹®¿¡¼­´Â µµ·Î µ¿»ó¹æÁöÃþÀÇ È¿¿ë¼º °ËÁõ ¹× ¼³Ä¡±âÁØ È®¸³À» À§ÇØ ½Ç³»µ¿°á½Ã½ºÅÛÀ» Ȱ¿ëÇÏ¿© µµ·Î ³ë»óÅäÀÇ µ¿»ó Ư¼º¿¡ ´ëÇÑ ¹Î°¨¼ºÀ» ÆÇº°, µµ·Î°Ç¼³ ÇöÀå ³ë»óÅä¿¡ ´ëÇÑ ¿ªÇÐÀû Ư¼º°ú ½Ç³» µ¿°á ½ÃÇèÀ» ¼öÇàÇÏ¿´À¸¸ç, ¿ÜºÎ µ¿°á¿ÂµµÀÇ Áö¼Ó Á¶°Ç¿¡ ´ëÇÑ ½Ã·áÀÇ ¿Âµµº¯È­, µ¿»óÆØÃ¢¾Ð, µ¿»óÆØÃ¢·®, ºÎµ¿¼öºÐ µîÀÇ °á°ú°ªÀ» ÅëÇÏ¿© µ¿°á °úÁ¤¿¡ µû¸¥ Áö¹Ý°øÇÐÀû Ư¼ºÀ» Æò°¡ÇÏ¿´´Ù.
The influence of fines of the frost susceptibility of subgrade soils were established by laboratory freezing system test simulating closely the thermal conditions in the field. During the winter season, the climate is heavily influenced by the cold and dry continental high pressure. Because of siberian air mass, the temperature of January is $-6{sim}-7^{circ}C$ on average. This chilly weather generate the frost heaving by freezing the moisture of soil and damage potential of the road structure. In the freezing soil, the ice lenses increase the freeze portion of soil by absorbing the ground water with capillary action. However, the capillary characteristics differ from the sort of soil on the state of freezing condition. In the current design codes for anti-freezing layer, the thickness of anti freezing layer is calculated by freezing depth against the temperature condition. Therefore, they have a tendency of over-design and uniform thickness without the considerations of thermal stability, bearing capacity and frost susceptibility of materials. So, it is essential for studying the appropriateness and bearing capacity besides the seasonal and mechanical properties of pavement materials to take a appropriate and reasonable design of the road structure. In this Paper, the evaluation of frost susceptibility was conducted by means of the mechanical property test and laboratory freezing system apparatus. The temperature, heaving amount, heaving pressure and unfrozen water contents of soil samples, the subgrade soils of highway construction site, were measured to determine the frost susceptibility.
 
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µ¿»ó;ºùÁ¤ºÐ¸®;½Ç³»µ¿°á½Ã½ºÅÛ;³ë»óÅä;ºÎµ¿¼öºÐ;frost heaving;ice segregation;laboratory freezing system;subgrade soil;unfrozen water;
 
Çѱ¹µµ·ÎÇÐȸ³í¹®Áý / v.12, no.2, 2010³â, pp.71-79
Çѱ¹µµ·ÎÇÐȸ
ISSN : 1738-7159
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201023064629247)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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