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Çѱ¹¼öÀÚ¿øÇÐȸ / v.43, no.5, 2010³â, pp.433-443
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( An Experimental Study for the Empirical Equation to Quantify the Subsidence of Riprap Scour Protection at Downstream of Vertical Drop Structures ) |
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³«Â÷°øÀº ÇÏõÀÇ °æ»ç¸¦ ¿ÏȽÃ۱â À§ÇØ ¼³Ä¡ÇÏ´Â ´ëÇ¥Àû Ⱦ´Ü±¸Á¶¹°·Î½á ±¹³» ÇÏõ¿¡¼ ½±°Ô º¼ ¼ö ÀÖ´Ù. ³«Â÷°ø¹°¹ÞÀ̺Î(apron)´Â ³«Â÷°ø º»Ã¼¿Í ÀÏÃ¼ÈµÈ ±¸Á¶¹°·Î ¼³Ä¡ÇÏ´Â °ÍÀÌ ÀϹÝÀûÀÌ¸ç ¹°¹ÞÀ̺ÎÀÇ ÇÏ·ùºÎ¿¡ ¹Ù´Úº¸È£°øÀ» ¼³Ä¡ÇÏ¿© ³«Â÷°ø°ú ¹°¹ÞÀ̸¦ º¸È£Çϵµ·Ï ¼³°èµÈ´Ù. ÀÌ¿¡ º» ¿¬±¸¿¡¼´Â ³«Â÷°ø ¹°¹ÞÀ̺ο¡¼ÀÇ ¼¼±¼Çö»ó°ú »ç¼®º¸È£°øÀ» ¼³Ä¡ÇÔÀ¸·Î½á ¹ß»ýÇϴ ħÇÏ·®¿¡ ´ëÇÑ ½ÇÇèÀ» ¼öÇàÇÏ¿´´Ù. ¼¼±¼Àº ³«Â÷°ø¿¡ À¯ÀԵǴ À¯·®ÀÌ Áõ°¡ÇÔ¿¡ µû¶ó ¼¼±¼½ÉÀº Áõ°¡ÇÏÁö¸¸ ³«Â÷°ø ÇÏ·ùºÎÀÇ ¼ö½ÉÀÌ Áõ°¡ÇÒ¼ö·Ï ¼¼±¼½ÉÀº °¨¼ÒÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¶ÇÇÑ ³«Â÷°ø ¹°¹ÞÀ̺Π»ç¼®º¸È£°øÀ» Æ÷¼³µÎ²²¿¡ µû¸¥Ä§ÇÏ·®À» »êÁ¤ÇÏ¿© ¼¼±¼½ÉÀ» Á¦¾îÇÏ°í ±¸Á¶¹°ÀÇ ¾ÈÀüÀ» È®º¸ÇÒ ¼ö ÀÖ´Â °¡´É¼ºÀ» È®ÀÎÇÏ¿´À¸¸ç ÃÖÁ¾ÀûÀ¸·Î ÇÊÅͰ¡ ¾ø´Â »ç¼®º¸È£°øÀÇ ¹«Â÷¿ø ħÇÏ·® »êÁ¤½ÄÀ» Á¦¾ÈÇÏ¿´´Ù. |
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Drop structures that span the entire width of channels are installed to alleviate channel grades and have been constructed widely in Korean rivers. Aprons are normally installed and integrated with drop structures and bed protections are added on the downstream part of aprons to protect both drop structures and aprons. Scour occurring on aprons is reported to provide various habitats such as ripples and pools in natural rivers. This study focuses on the scour characteristics on an apron integrated with a drop structure and the subsidence of a riprap protection. The scour depth on the downstream part of the drop structure is found to increase with the increase of unit discharge; however, to decrease as the tail water depth gets deeper. Based on the experimental measurements, the subsidence of the riprap scour protection is calculated with respect to the thickness of riprap. Finally, the dimensionless empirical equation to quantify the subsidence of the riprap scour protection without filters at downstream of the vertical drop is suggested. |
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Ű¿öµå |
³«Â÷°ø;¼¼±¼½É;»ç¼®º¸È£°ø;»ç¼®Ä§ÇÏ·® »êÁ¤½Ä;drop structure;scour depth;riprap protection;riprap subsidence equation; |
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.43, no.5, 2010³â, pp.433-443
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201016264960180)
¾ð¾î : Çѱ¹¾î |
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³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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