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Çѱ¹Áö¹Ý°øÇÐȸ / v.20, no.7, 2004³â, pp.159-169
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°¿ì½Ã ±¹³» ºÒÆ÷È Ç³ÈÅä »ç¸é¿¡¼ÀÇ ½ÀÀ±¿µÇ⠺м®
( Influence of Rainfall-induced Wetting on Unsaturated Weathered Slopes ) |
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| ¾èÀº»ç¸é ÆÄ±«´Â ÁöÇ¥·Î ħÅõÇÏ´Â °¿ì¿¡ ÀÇÇØ ÁÖ·Î ¹ß»ýÇÑ´Ù. ÀÌ´Â ÁöÇ¥¼öÀÇ Ä§Åõ½Ã ¸ð°üÈí¼ö·ÂÀÇ °¨¼Ò¿¡ ÀÇÇÑ Æ÷ȱíÀÌ Áõ°¡¿¡ ÀÇÇØ ¹ß»ýÇÑ´Ù. º» ¿¬±¸¿¡¼´Â ±¹³»ÀÇ ÀüÇüÀûÀΠȰdzÈÅ並 ´ë»óÀ¸·Î °¿ì½Ã »ç¸é¿¡¼ÀÇ ½ÀÀ±¿µÇâÀ» ºÐ¼®ÇÏ¿´´Ù. À̸¦ À§ÇÏ¿© filter paper¿Í tensiometer ½ÇÇèÀ» ¼öÇàÇÏ¿© ÇÔ¼öƯ¼º°î¼±À» »êÁ¤ÇÏ¿´À¸¸ç, ±×¿¡ µû¸¥ ÇÔ¼öƯ¼º°î¼±ÀÇ ¹æÁ¤½ÄÀ» ÃßÁ¤ÇÏ¿´À¸¸ç, ±âÁ¸¿¡ »ç¿ëµÇ°í ÀÖ´Â Green & AmptÀÇ Æ÷È ±íÀÌ ÃßÁ¤½Ä°ú ¼öÄ¡ÇØ¼®°á°ú¸¦ ºñ±³ ºÐ¼®ÇÏ¿´´Ù. º» ¿¬±¸ °á°ú, Green & Ampt¸ðµ¨¿¡ ÀÇÇÑ ÀÌ·Ð ÇØ´Â Æ÷ȱíÀ̸¦ °ú¼Ò ÃßÁ¤ÇÏ¿´À¸¸ç, Æ÷ȱíÀ̰¡ Áõ°¡ÇÔ¿¡ µû¶ó »ç¸é¾ÈÀüÀ²Àº °¨¼ÒÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ƯÈ÷ Æ÷ȱíÀ̰¡ ¾à 1.2mÀÌ»óºÎÅÍ »ç¸é¾ÈÀüÀ²Àº ÇöÀúÇÏ°Ô °¨¼ÒÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. |
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| Surface failures of slopes in weathered soil are caused by infiltration due to prolonged rainfall. These failures are mainly triggered by the deepening of the wetting band accompanied by a decrease in suction induced by the infiltrating water. This paper reports trends of rainfall-induced wetting band depth in two types of weathered soils that are commonly found in Korea. Both theoretical and numerical analyses are presented based on the soil-water characteristic curve (SWCC) obtained using filter paper as well as tensiometer tests. It is found that the magnitude of wetting front suction plays a key role in the stability of slopes in weathered soils. Theoretical analysis based on modified Green and Ampt model tends to underestimate the wetting band depth for typical Korean weathered soils. It was also deduced that for Korean weathered soils, the factor of safety drops rapidly once the wetting band depth of 1.2 m is reached. |
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| Ű¿öµå |
| Infiltration;Rainfall;Slope stability;Unsaturated soils;Wetting front suction; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.20, no.7, 2004³â, pp.159-169
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200425720311255)
¾ð¾î : ¿µ¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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