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Çѱ¹¼öÀÚ¿øÇÐȸ / v.29, no.4, 1996³â, pp.177-186
¸¸°îºÎ È¥ÇÕÀÔ°æ ÇÏ»óȾ°æ»ç ¸ðÇüÀÇ °³¹ß
( Development of Transverse Bed Slope Model for Nonuniform Sand Bed at River Bend )
ÃÖÁ¾ÀÎ;°íÀç¿õ; »ïô»ê¾÷´ëÇб³ Åä¸ñ°øÇаú;°Ç±¹´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;
 
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ÇÏõ ¸¸°îºÎ¿¡¼­ÀÇ ÇÏ»ó Ⱦ°æ»ç °áÁ¤Àº À¯¼ö¿Í À¯¼öÀÇ ¼Ò·ù·Â¿¡ ÀÇÇØ º¯µ¿ÇÏ´Â ÇÏ»ó¸é°úÀÇ »óÈ£°ü°è¸¦ ±Ô¸íÇÏ´Â ÀÌ·ÐÀûÀÎ Á¢±Ù¿¡¼­ Ãâ¹ßÇÏ°Ô µÈ´Ù. ÀÌ·¯ÇÑ °æ¿ì È帧Àº ¿ÏÀüÈ÷ ¹ß´ÞÇÑ È帧À¸·Î ÇØ¼®ÇÏ°Ô µÇ¸ç Çϻ󿡼­´Â ¼Ò·ù»ç°¡ ÀϾ°í ÀÖ´Â »óÅ¿¡¼­ À¯¼ö·Â°ú ÇÏ»ó¹°Áú¿¡ ÀÇÇÑ ÀúÇ׷°£ÀÇ ÆòÇüÀ» ¹ÙÅÁÀ¸·Î ÇØ¼®À» ½ÃµµÇÏ°Ô µÈ´Ù. ÇѰè¼Ò·ù·ÂÀ» ´ëÇ¥ÇÏ´Â ¿¬±¸·Î¼­ Shields diagramÀÌ ¸¹ÀÌ ÀÌ¿ëµÇ°í ½Ãµ¿Á¶°ÇÀ¸·Î Shields parameter¸¦ 0.06À¸·Î ´ëÇ¥ÇØ ÁÖ°í ÀÖ´Ù. Áö±Ý±îÁö ¸¸°îºÎÀÇ ÇÏ»óȾ°æ»ç °áÁ¤¿¡¼­´Â ´ëºÎºÐÀÇ ¹æ¹ýµéÀÌ Shields parameter ÀÇ Àû¿ë¿¡¼­ 0.06À» ÀÏ·üÀûÀ¸·Î äÅÃÇϰí ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â Shields parameter¿¡¼­ÀÇ ½ÇÇèÁ¶°ÇÀÎ ±ÕÀÏÀÔ°æÇÏ»óÀ̶ó´Â Á¶°ÇÀÌ Àû¿ëµÇÁö ¾Ê´Â ÀÏ¹Ý ÀÚ¿¬ÇÏõ¿¡¼­ È¥ÇÕÀÔ°æÇÏ»óÀÇ ÀÔµµºÐÆ÷°î¼± ÇüÅ¿¡ µû¶ó »ý±â´Â Shields parameterÀÇ º¯µ¿À» °í·ÁÇÒ ¼ö ÀÖµµ·Ï ÇÏ¹Ç·Î½á º¸´Ù Á¤È®ÇÑ ¸¸°îºÎ ÇÏ»óȾ°æ»ç ÃßÁ¤ÀÌ °¡´ÉÇÑ ¹æ¹ýÀ» Á¦½ÃÇÏ¿´´Ù.
The analytical approach to determine transverse sand bed slope at river bend are based on two phases that the flow is considered as fully developed flow and the bed is fluvial having bed load. All existing methods are theoretically derived from the initiation of motion of the particles at river bed. They assume that the Shields parameter has a constant value of 0.06. In this study, the variability of Shields parameter due to the differences of shape of grain size distribution is considered. Therefore the parameter is not a constant, 0.06, but depends on the shape of the grain size distribution. This result gives good agreement to estimate transverse bed slope with actual field data at river bend.
 
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.29, no.4, 1996³â, pp.177-186
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199611920097570)
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