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Çѱ¹Áö¹Ý°øÇÐȸ / v.20, no.3, 2004³â, pp.67-74
Áö¹ÝÀÇ Ä§½ÄƯ¼ºÀ» ÀÌ¿ëÇÑ ±³°¢¼¼±¼ »ç·Ê ¿¬±¸
( A Case Study of Pier Scour Considering Soil Erodibility )
°û±â¼®;Á¤¹®°æ;ÀÌÁÖÇü;¹ÚÀçÇö; Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø Áö¹Ý¿¬±¸ºÎ;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø Áö¹Ý¿¬±¸;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø Áö¹Ý¿¬±¸;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø Áö¹Ý¿¬±¸ºÎ;
 
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»ç·Ê ¿¬±¸¸¦ ÅëÇØ¼­ ½ÇÁ¦ ¼¼¸³Åä ±³·®ÇöÀå¿¡ ´ëÇØ ±âÁ¸ ±³·®¼¼±¼ ÇØ¼®¸ðµ¨µéÀÇ Àû¿ë¼ºÀ» ºÐ¼®ÇÏ¿´´Ù. ÇÏ»óÀÌ ½ÇÆ®Áú Á¡Åä·Î ±¸¼ºµÈ °­È­ ÃÊÁö´ë±³¸¦ ´ë»ó±³·®À¸·Î ¼±Á¤ÇÏ¿© ÇöÀåÁ¶»ç¸¦ ½Ç½ÃÇÏ¿´´Ù. ÃÊÀ½ÆÄ ¼¾¼­Àåºñ¸¦ ÀÌ¿ëÇÏ¿© ±³°¢ÁÖº¯ÀÇ ¼¼±¼½ÉÀ» Á÷Á¢ ÃøÁ¤ÇÏ¿´À¸¸ç, ºÒ±³¶õ½Ã·á¸¦ äÃëÇÏ¿© Áö¹Ý°øÇÐÀû Ư¼ºÀ» °áÁ¤Çϰí, ¶ÇÇÑ ¼¼±¼·ü ½ÇÇèÀ» ÅëÇØ ´ë»ó Áö¹ÝÀÇ À¯¼Óº° ¼¼±¼·üÀ» ºÐ¼®ÇÏ¿´´Ù. ±× °á°ú¸¦ ¹ÙÅÁÀ¸·Î ±âÁ¸¿¡ Á¦¾ÈµÈ ´ëÇ¥ÀûÀÎ ±³·®¼¼±¼ ÇØ¼®¸ðµ¨µéÀ» ÀÌ¿ëÇÏ¿© ÁÖ¿ä ±³°¢ÀÇ ¼¼±¼½ÉÀ» ¿¹ÃøÇÏ¿© ½ÇÃø ¼¼±¼½É°ú ºñ±³ÇÏ¿´´Ù. Áö¹ÝÀÇ Ä§½ÄƯ¼ºÀ» °í·ÁÇÏÁö ¾Ê´Â ±âÁ¸ÀÇ ±³·®¼¼±¼ ÇØ¼®¸ðµ¨µéÀº ¸ðµÎ 3.6¡­6.5ÀÇ ºñÀ²·Î ¼¼±¼½ÉÀ» °ú´ëÆò°¡ÇÏ´Â °æÇâÀ» º¸¿´À¸¸ç, SRICOS ¹æ¹ýÀº ½ÇÃø¼¼±¼½É¿¡ ºñÇØ 1.7¹èÀÇ ÇÕ¸®ÀûÀÎ °á°ú¸¦ º¸¿©ÁÖ¾ú´Ù.
A case study was performed to verify the applicability of existing formulae for predicting bridge scour in cases where its piers are founded in fine-grained soils. The object of study was the Kanghwa Choji Bridge area where the streambed consists of mainly clayey soil. Site investigation included: direct measurement of scour depths around piers using an ultrasonic probe; and collection of undisturbed soil samples which were later used to determine geotechnical properties and scour rate under different stream velocities. Scour depth prediction was made by employing several conventional methods and compared with the measured value. All methods, not taking soil's intrinsic property against erosion into consideration, overestimated scour depth by a factor of 3.6 to 6.5. On the other hand, the SRICOS method yielded a reasonably acceptable overestimation by a factor of 1.7.
 
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Cohesive soils;Erosion rate;Equivalent time;Pier scour;Shear stress;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.20, no.3, 2004³â, pp.67-74
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200411922341569)
¾ð¾î : Çѱ¹¾î
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