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Çѱ¹Áö¹Ý°øÇÐȸ / v.19, no.1, 2003³â, pp.41-49
dzȭÅä »ç¸é¿¡¼­ °­¿ì·Î ÀÎÇÑ °£±Ø¼ö¾Ð º¯È­¿¡ ´ëÇÑ ½ÇÇ迬±¸
( In-situ Monitoring of Matric Suctions in a Weathered Soil Slope )
ÀÌÀθð;Á¶¿ì¼º;±è¿µ¿í;¼º»ó±Ô; °í·Á´ëÇб³ Åä¸ñȯ°æ°øÇаú;Çö´ë°Ç¼³¢ß ±¹³»Åä¸ñºÎ;¸íÁö´ëÇб³ Åä¸ñ°øÇаú;°í·Á´ëÇб³ Åä¸ñȯ°æ°øÇаú;
 
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¿ì¸®³ª¶ó¿¡¼­ ÈçÈ÷ º¼ ¼ö ÀÖ´Â È­°­Ç³È­Åä »ç¸é¿¡¼­ °­¿ìħÅõ·Î ÀÎÇÑ »ç¸éÆÄ±«´Â Åë»ó ÁöÇϼöÀ§ À§ÂÊÀÇ ¾èÀº ±íÀÌ¿¡¼­ ¹ß»ýÇÑ´Ù. ÁöÇϼöÀ§ À§ÂÊ Áö¹ÝÀÇ °£±Ø¼ö¾ÐÀº ´ë±â¾Ð¿¡ ´ëÇÏ¿© À½ÀÇ °ªÀ» °®´Â´Ù. ÀÌ·¯ÇÑ ¸ð°üÈí¼ö·ÂÀÇ Á¸Àç¿Í Å©±â´Â »ç¸éÀÇ ¾ÈÁ¤¼º¿¡ Å©°Ô ±â¿©ÇÏ´Â °ÍÀ¸·Î ¹àÇôÁ³´Ù. µû¶ó¼­, °èÀýÀû °­¿ì¿¡ ÀÇÇÑ Ç³È­Åä »ç¸éÀÇ ¾èÀº ÆÄ±«±â±¸(failure mechanism)¸¦ ±Ô¸íÇϱâ À§Çؼ­´Â ºñÆ÷È­´ë¿¡¼­ÀÇ ¸ð°üÈí¼ö·Â ºÐÆ÷¸¦ ¿¹ÃøÇÏ´Â °ÍÀÌ ÇʼöÀûÀÌ´Ù. ÀÌ ¿¬±¸¿¡¼­´Â 2001³â 6¿ùºÎÅÍ 8¿ù±îÁö È­°­Ç³È­Åä »ç¸é¿¡¼­ ¸ð°üÈí¼ö·Â ¹× üÀûÇÔ¼öºñ¸¦ ÇöÀå ¸ð´ÏÅ͸µ ÇÏ¿´À¸¸ç, ´ë»óÁö¹Ý¿¡ ´ëÇÑ Åõ¼öÇØ¼®À» ¼öÇàÇÏ¿´´Ù. ÇöÀå ¸ð´ÏÅ͸µ °á°ú, ±âÈÄÁ¶°ÇÀÇ ¿µÇâ·ÂÀº ±íÀÌ¿¡ µû¶ó °¨¼ÒÇÏ´Â °æÇâÀ» º¸¿´À¸¸ç °­¿ìħÅõ¿¡ ÀÇÇÑ Áö¹Ý³» ¸ð°üÈí¼ö·ÂÀÇ °¨¼Ò´Â °­¿ì·® ¹× °­¿ìÁö¼Ó½Ã°£ »Ó¸¸ ¾Æ´Ï¶ó °­¿ìÁ÷ÀüÀÇ ¸ð°üÈí¼ö·Â ºÐÆ÷¿¡µµ Å« ¿µÇâÀ» ¹Þ°í ÀÖ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¸ð´ÏÅ͸µµÈ ¸ð°üÈí¼ö·Â°ú üÀûÇÔ¼öºñ¸¦ ÀÌ¿ëÇÏ¿© ÇöÀå Èë-¼öºÐƯ¼ºÀ» ¾òÀ» ¼ö ÀÖ¾ú´Âµ¥ ½ÀÀ±°æ·Î(wetting path)¿¡ °¡±î¿î ºÐÆ÷¸¦ º¸¿´´Ù.
Rainfall-induced landslides in a weathered granite soil slope usually happen on shallow slip surfaces above the groundwater table. The pore-water pressure of soil above the groundwater table is usually negative. This negative pore-water pressure (or matric suction) has been found to make a large contribution to the slope stability. Therefore, the variation of in-situ matric suction profiles with time elapse in a soil slope should be understood. In this study, a field measurement program was carried out from June to August, 2001 in order to monitor in-situ matric suctions and volumetric water contents in a weathered granite soil slope. Finite-element transient seepage analyses are also conducted using SEEP/W. The influence of climatic conditions on the variation of in-situ matric suctions could be found to decrease rapidly with the change of depth. It could be found that decrement of matric suction induced by precipitation is affected not only by the amount and duration of rainfalls but also by the initial matric suction just prior to rainstorms. The soil-water characteristic from the field monitoring tends toward the wetting path of SWCC obtained from the laboratory test.
 
Ű¿öµå
Matric suction;Rainfall;Pore-water pressure;Soil-water characteristic;Weathered granite;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.19, no.1, 2003³â, pp.41-49
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200311921582131)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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