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Çѱ¹¼öÀÚ¿øÇÐȸ / v.34, no.6, 2001³â, pp.753-761
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±³°¢ÁÖÀ§ ±¹ºÎ¼¼±¼ ¹æÁö¸¦ À§ÇÑ »ç¼®Å©±â °áÁ¤ °ø½Ä
( A formula for the Decision of the Riprap Size for the Local Scour Protection around Bridge Piers ) |
| ÃÖ°è¿î;±èÇöÅÂ;¾È°æ¼ö; ÀÎõ´ëÇб³ °ø°ú´ëÇÐ Åä¸ñȯ°æ½Ã½ºÅÛ°øÇаú;ÀÎõ´ëÇб³ °ø°ú´ëÇÐ Åä¸ñȯ°æ½Ã½ºÅÛ°øÇаú;ÀÎõ´ëÇб³ °ø°ú´ëÇÐ Åä¸ñȯ°æ½Ã½ºÅÛ°øÇаú;
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| º» ³í¹®¿¡¼´Â ±³°¢ÁÖÀ§¿¡¼ÀÇ ±¹ºÎ¼¼±¼ ¹æÁö¸¦ À§ÇÑ »ç¼® Å©±â ¹× Á¢±Ù°¢µµ ¿µÇâ°è¼ö¸¦ °áÁ¤Çϱâ À§ÇÑ ½ÇÇèÀ» ½Ç½ÃÇÏ¿´À¸¸ç, ½ÇÇè°á°ú¿¡ ±âÃÊÇÏ¿© »ç¼®Å©±â °áÁ¤ °ø½Ä°ú Á¢±Ù°¢µµ ¿µÇâ°è¼ö¸¦ Á¦¾ÈÇÏ¿´´Ù. Á¢±Ù°¢µµ ¿µÇâ°è¼ö´Â ±³°¢ÀÇ À寸ºñ¿¡ µû¶ó ´Ù¸¥ °ªÀ» º¸ÀÌ¸ç ±³°¢¿¡¼ÀÇ Á¢±Ù°¢µµ°¡ Áõ°¡µÊ¿¡ µû¶ó ¿µÇâ°è¼ö°¡ Áõ°¡ÇÏ´Â °æÇâÀ» º¸ÀδÙ. º» ¿¬±¸¿¡¼´Â 90%, 92.86%, 95%ÀÇ °³µµºñ¿Í 1¡4ÀÇ À寸ºñ¸¦ °¡Áø ±³°¢°ú 00, 150, 300, 450 ¹× 600ÀÇ Á¢±Ù°¢µµ¿¡ µû¸¥ ½ÇÇèÀ» ½Ç½ÃÇÏ¿© ±³°¢ÁÖÀ§¿¡¼ ±¹ºÎ ¼¼±¼ ¹æÁö¸¦ À§ÇÑ »ç¼®Å©±â¸¦ °áÁ¤ÇÏ´Â 1°³ÀÇ °ø½ÄÀ» Á¦¾ÈÇÏ¿´´Ù. º» ³í¹®¿¡¼ Á¦¾ÈµÈ »ç¼®º¸È£°øÀÇ Å©±â °áÁ¤°ø½ÄÀ» »ç¿ëÇÏ¿© »ç¼®À» Å©±â¸¦ »êÁ¤ÇÑ °á°ú¿Í ±âÁ¸ÀÇ 6°³ÀÇ »ç¼® º¸È£°ø °ø½ÄÀ» ºñ±³ÇÑ °á°ú, º» °ø½ÄÀ» »ç¿ëÇÑ °á°ú´Â Richardson °ø½ÃÀ» ÀÌ¿ëÇÏ¿© »êÁ¤ÇÑ »ç¼®Å©±â¿Í ºñ½ÁÇÑ °á°ú¸¦ ³ªÅ¸³»¾ú´Ù. ±³°¢¼³Ä¡ÁöÁ¡¿¡ ´ëÇÑ È帧ÀÇ Á¢±Ù°¢µµ ¿µÇâ°è¼ö°¡ °í·ÁµÈ º» ³í¹®¿¡¼ Á¦¾ÈµÈ »ç¼®º¸È£°ø °ø½ÄÀº ÇâÈÄ ±¹³» ÇÏõ¿¡¼ÀÇ ±¹ºÎ¼¼±¼ ¹æÁö¸¦ À§ÇÑ »ç¼®º¸È£°ø ¼³°è¿¡ Æø³Ð°Ô »ç¿ëµÉ ¼ö ÀÖÀ» °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù. |
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| In this paper, the experiments to decide the riprap size for the local scour protection at bridge piers and the coefficients of attack angle were conducted. A formula for the decision of the riprap size and a figure for the coefficients of attack angle were suggested based upon the experimental results. The coefficients of attack angle indicate different values based on the variation of the length-width ratio of bridge pier and the coefficients are increased by the increment of the attack angle. In this paper, the experiments using the piers having the opening ratios of 90%, 92.86% and 95% were conducted. Also, the attack angles 0$^{circ}$, 15$^{circ}$, 30$^{circ}$, 45$^{circ}$ and 60$^{circ}$ as well as four different length-width ratios of the bridge pier were utilized. The suggested formula were compared with 6 different formulas and the riprap sizes calculated using the equation suggested in this paper indicate the similar patterns with the formula suggested by Richardson. The suggested formula in this paper can be widely applied in the riprap design for the local scour protection around the bridge pier with the consideration of the attack angle to the flow. |
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| Ű¿öµå |
| ±¹ºÎ¼¼±¼;»ç¼®º¸È£°ø;Á¢±Ù°¢µµ ¿µÇâ°è¼ö;local scour;riprap protection;coefficient of attack angle; |
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.34, no.6, 2001³â, pp.753-761
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200111920878212)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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