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Çѱ¹Áö¹Ý°øÇÐȸ / v.25, no.5, 2009³â, pp.53-64
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°¿ì·Î ÀÎÇÑ »ç¸éÀÇ ºÒ¾ÈÁ¤¼º¿¡ ´ëÇÑ ½Å·Ú¼º ÀÖ´Â Æò°¡
( Reliable Assessment of Rainfall-Induced Slope Instability ) |
| ±èÀ±±â;ÃÖÁ¤Âù;À̽·¡;¼ºÁÖÇö; KAIST °Ç¼³¹×ȯ°æ°øÇаú;KAIST °Ç¼³¹×ȯ°æ°øÇаú;KAIST °Ç¼³¹×ȯ°æ°øÇаú;Çѱ¹½Ã¼³¾ÈÀü°ü¸®°ø´Ü ±â¼ú°³¹ßÆÀ;
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| °¿ìħÅõ·Î ÀÎÇÏ¿© ¸¹Àº »ç¸éÀÌ ºØ±«µÇ°í ÀÖ´Ù. µû¶ó¼ »ç¸é¿¡ ´ëÇÑ ÃÖ±Ù ¿¬±¸µéÀº °¿ì°¡ À¯¹ßÇÏ´Â »ç¸éÀÇ ºÒ¾ÈÁ¤¼º¿¡ ÃÊÁ¡ÀÌ ¸ÂÃçÁ® ÀÖÀ¸¸ç °¿ìħÅõ ¹®Á¦´Â Áß¿äÇÑ »ç¸éºØ±« ¹ß»ý ¿äÀÎÀ¸·Î Àνĵǰí ÀÖ´Ù. °¿ì°¡ »ç¸é ³»ºÎÀÇ ¸ð°üÈí¼ö·ÂÀ» °¨¼Ò½ÃŰ¸é¼ »ç¸é ³»ºÎ·Î ħÅõµÇ¸ç ½ÉÁö¾î Áö¹ÝƯ¼º¿¡ µû¶ó Ç¥Ãþ ±Ù¿¡¼ ¾çÀÇ °£±Ø¼ö¾ÐÀÌ ¹ß»ýÇÒ ¼öµµ ÀÖ´Ù. ÀÌ·¯ÇÑ Çö»óÀº »ç¸é °µµ¸¦ °¨¼Ò½ÃÄÑ »ç¸é ºØ±«¸¦ À¯¹ßÇÒ ¼ö ÀÖ´Ù. ±¹³» ¿©·¯ °ø°ø±â°ü¿¡¼´Â ÁöÇϼöÀ§°¡ Ç¥Ãþ ¶Ç´Â ¹ÐÁ¤ ±íÀÌ ³»¿¡ Á¸ÀçÇϵµ·Ï ÇÏ¿© »ç¸éÀÇ Æ÷È»óŸ¦ °¡Á¤ÇÏ´Â º¸¼öÀûÀÎ »ç¸é ¼³°è¹æ¾ÈÀ» Á¦½ÃÇÏ¿´À¸³ª, ÀÌ·¯ÇÑ °¡Á¤Àº ´ëºÎºÐ ºÎÀûÀýÇϰí À̸¦ ¸¸Á·½Ã۱â À§ÇØ ¶§·Î´Â »ç¸é¼³°è ´Ü°è¿¡¼ À߸øµÈ Áö¹Ý¹°¼ºÀÌ »ç¿ëµÇ±âµµ ÇÑ´Ù. º» ³í¹®¿¡¼´Â ½ÇÁ¦ °¿ìħÅõ Çö»óÀ» °í·ÁÇÏ¿© º¸´Ù ÇÕ¸®ÀûÀ¸·Î »ç¸éÀÇ ¾ÈÁ¤¼ºÀ» Æò°¡ÇÏ´Â ±â¹ýÀÌ Á¦¾ÈµÇ¾ú´Ù. ±¹³» dzÈÅä¿¡ ´ëÇÑ ºÒÆ÷È Áö¹Ý¹°¼º(°µµ, ÇÔ¼öƯ¼º°î¼±, Åõ¼ö°î¼±)ÀÌ ½ÇÇèÀûÀ¸·Î ȹµæµÇ¾úÀ¸¸ç, Àΰø½Å°æ¸Á ¸ðµ¨À» ÅëÇØ °£Á¢ÀûÀ¸·Îµµ ÃßÁ¤µÇ¾ú´Ù. ¶ÇÇÑ ÇöÀå °èÃøÀÚ·áÀÇ ºÒÈ®½Ç¼ºÀ» º¸¿ÏÇϱâ À§ÇÏ¿© »ç¸éÀÇ ºÒ¾ÈÁ¤¼º Æò°¡±â¹ý¿¡ ´ëÇÏ¿© °áÁ¤·ÐÀû ÇØ¼®°ú È®·ü·ÐÀû ÇØ¼®¿¡ ±â¹ÝÇÑ ½Ç½Ã°£ »ç¸é ºØ±« °æº¸ ±âÁØÀÌ ¸ð´ÏÅ͸µ ½Ã½ºÅÛ¿¡ µµÀԵǾú´Ù. ÀÌ·¯ÇÑ »ç¸é¾ÈÁ¤¼º Æò°¡±â¹ýÀº »ç¸é ³»ºÎÀÇ ¸ð°üÈí¼ö·Â, ÇÔ¼öºñ¿Í °°Àº Áß¿ä¿ä¼Ò¸¦ °èÃøÇÑ ÇöÀåÀÚ·á¿Í Á¢¸ñÇÏ¿© °¿ì¿¡ µû¶ó ºÒ¾ÈÁ¤ÇØÁø »ç¸é¿¡ ´ëÇÑ Á¶±â °æº¸½Ã½ºÅÛÀ¸·Î Ȱ¿ëµÉ ¼ö ÀÖ´Ù. |
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| Many slope failures are induced by rainfall infiltration. A lot of recent researches are therefore focused on rainfall-induced slope instability and the rainfall infiltration is recognized as the important triggering factor. The rainfall infiltrates into the soil slope and makes the matric suction lost in the slope and even the positive pore water pressure develops near the surface of the slope. They decrease the resisting shear strength. In Korea, a few public institutions suggested conservative slope design guidelines that assume a fully saturated soil condition. However, this assumption is irrelevant and sometimes soil properties are misused in the slope design method to fulfill the requirement. In this study, a more relevant slope stability evaluation method is suggested to take into account the real rainfall infiltration phenomenon. Unsaturated soil properties such as shear strength, soil-water characteristic curve and permeability for Korean weathered soils were obtained by laboratory tests and also estimated by artificial neural network models. For real-time assessment of slope instability, failure warning criteria of slope based on deterministic and probabilistic analyses were introduced to complement uncertainties of field measurement data. The slope stability evaluation technique can be combined with field measurement data of important factors, such as matric suction and water content, to develop an early warning system for probably unstable slopes due to the rainfall. |
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| Ű¿öµå |
| Probabilistic analysis;Rainfall infiltration;Slope design;Slope stability;Unsaturated soil; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.25, no.5, 2009³â, pp.53-64
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200921140046736)
¾ð¾î : ¿µ¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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