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													| Çѱ¹¼öÀÚ¿øÇÐȸ / v.31, no.5, 1998³â, pp.539-552   |  
													| Á¡Âø¼º Çϻ󿡼ÀÇ ±³°¢Çü»ó¿¡ µû¸¥ ±¹ºÎ¼¼±¼ ¿¬±¸ ( A Study of the Local Scour Considering the Pier Shapes in the Cohesive Bed )
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													| ÃÖ°è¿î;±è±âÇü; ÀÎõ´ëÇб³ Åä¸ñ°øÇаú;ÀÎõ´ëÇб³ Åä¸ñ°øÇаú; |  |  |  
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													| Á¡Âø¼º ÇÏ»ó¿¡ ±³°¢À» ¼³Ä¡ÇÏ´Â °æ¿ì, »ç¿ëµÇ´Â ±¹ºÎ¼¼±¼½Éµµ »êÁ¤°ø½ÄÀº ´ëºÎºÐÀÌ ºñÁ¡Âø¼º ÇÏ»óÀ» °¡Áø ¼ö·Î¿¡¼ÀÇ ½ÇÇè°á°ú¿¡ ±Ù°Å¸¦ µÎ°í Àֱ⠶§¹®¿¡, Á¤È®¼º¿¡ ´ëÇÑ ³í¶õÀÌ ÀÖ´Ù. º» ³í¹®¿¡¼´Â, Á¡Âø¼º ÇÏ»óÀç·á¸¦ °¡Áø ½ÇÇè¼ö·Î ³»¿¡ 5°³ ÇüÅÂÀÇ ±³°¢À» ¼³Ä¡ÇÏ¿© ¹ß»ýµÇ´Â ¼¼±¼½ÉµµÀÇ º¯È¿¡ ´ëÇÏ¿© ¿¬±¸ÇÏ¿´´Ù. ½ÇÇè°á°ú´Â Froude ¼ö¿Í ±³°¢Æø¿¡ ´ëÇÑ ¼ö½ÉÀÇ º¯È¿¡ µû¶ó ºÐ¼®µÇ¾úÀ¸¸ç ±âÁ¸°ø½Ä¿¡ ÀÇÇÑ °á°ú¿Íµµ ºñ±³ÇÏ¿´´Ù. º» ³í¹®¿¡¼´Â ½ÇÇè °á°ú¸¦ ¹ÙÅÁÀ¸·Î Á¡Âø¼º Çϻ󿡼 »ç¿ëÇÒ ¼ö ÀÖ´Â ±³°¢Çü»ó°è¼ö¸¦ Á¦¾ÈÇÏ¿´´Ù. ±³°¢Çü»ó°è¼ö´Â ¿øÇü±³°¢ ÁÖÀ§¿¡¼ ¹ß»ýµÇ´Â ¼¼±¼½Éµµ¿¡ ´ëÇÑ Å¸ÇüÅÂÀÇ ±³°¢ÁÖÀ§¿¡¼ ¹ß»ýµÇ´Â ¼¼±¼½ÉµµÀÇ ºñÀ²·Î ³ªÅ¸³»¾úÀ¸¸ç, ¼ö½É¿¡ µû¶ó 2´Ü°è·Î ±¸ºÐÇÏ¿© Á¦¾ÈÇÏ¿´´Ù. 1´Ü°è´Â ±³°¢Æø¿¡ ´ëÇÑ ¼ö½ÉÀÌ 1.2 ÀÌÇÏÀÎ °æ¿ì·Î ¹æÁ¤½Ä¿¡ ÀÇÇÏ¿© ±³°¢Çü»ó°è¼ö°¡ Á¦¾ÈµÈ ¹Ý¸é 2´Ü°è¿¡¼´Â »ó¼ö°ªÀ¸·Î ±³°¢Çü»ó°è¼ö°¡ Á¦¾ÈµÇ¾ú´Ù. º» ³í¹®¿¡¼ Á¦¾ÈµÈ ±³°¢ Çü»ó °è¼ö´Â º» ½ÇÇè¿¡¼ »ç¿ëµÈ ÇÏ»óÀç·á¿Í À¯»çÇÑ Á¡Âø¼º ÇÏ»ó¿¡ ¼³Ä¡µÈ ±³·®ÀÇ ±³°¢ ±¹ºÎ¼¼±¼½É »êÁ¤¿¡ È¿°úÀûÀ¸·Î ÀÌ¿ëµÉ °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù. |  
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													| When the pier is constructed in the cohesive be, the accuracy maynot be obtained because the equation for calculating the scour at piers is based upon the results which are analyzed through the experiments in the non-cohesive bed. In this paper, the variation of the depth of the pier scour occurred by constructing 5 types of pier in the channel having the cohesive material is examined. The experimental results are analyzed based upon Froude numbers and non-dimensional numbers which are indicated as the flow depths compared to the pier width. The results are also compared with the results obtained using the existing pier scour equations. In this paper, the shape factors, which can be used for calculating the scour depth of the pier in the cohesive channel bed, are suggested. The shape factors are indicated through the ratios between the scour depth at the circular pier and the scour depths at the different types of pier, and are suggested as two stages. In the first stage, in which the water depth compared to the pier width is less than 1.2, the shape factors are given as the equations. However, in the second stage the shape factors are given as the constant values. It is understood that the shape factors suggested in this paper can be properly usd for calculating local scour at piers in the bridges which are constructed in the cohesive channel bed having the characteristics of the bed material which is used in these experiments. Keywords : local scour, maximum scour depth, cohesive bed material, pier shape, pier, shape factor. |  
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													| ±¹ºÎ¼¼±¼;ÃÖ´ë¼¼±¼½Éµµ;Á¡Âø¼º ÇÏ»óÀç·á;±³°¢ÇüÅÂ;±³°¢Çü»ó°è¼ö;local scour;maximum scour depth;cohesive bed material;pier shape;pier;shape factor; |  
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													| Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.31, no.5, 1998³â, pp.539-552 Çѱ¹¼öÀÚ¿øÇÐȸ
 ISSN : 1226-6280
 UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199811920101213)
 ¾ð¾î : Çѱ¹¾î
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													| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |  
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