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Çѱ¹Áö¹Ý°øÇÐȸ / v.25, no.7, 2009³â, pp.5-10
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( Expansion Ratio and Ultimate Load of Pulse-Discharge Bulbed Anchors )
±è³«°æ;±è¼º±Ô;ÁÖ¿ë¼±;¼­È¿±Õ;±è¼±ÁÖ; ¼º±Õ°ü´ëÇб³ Åä¸ñȯ°æ°øÇаú;¼º±Õ°ü´ëÇб³ Åä¸ñȯ°æ°øÇаú;¼º±Õ°ü´ëÇб³ Åä¸ñȯ°æ°øÇаú;¼º±Õ°ü´ëÇб³ Åä¸ñȯ°æ°øÇаú;´ë¿ì°Ç¼³±â¼ú¿¬±¸¼Ò;
 
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´À½¼ÇÑ »çÁúÅ䳪 ¿¬¾à Á¡ÅäÃþ¿¡¼­´Â Å« ¾ÞÄ¿ ±ØÇÑÀι߷ Ȯº¸°¡ ¾î·Æ±â ¶§¹®¿¡ ¾ÞÄ¿°ø¹ýÀÌ Àß Àû¿ëµÇÁö ¾Ê´Â´Ù. ±×·¯³ª ¾ÞÄ¿ õ°ø ȦÀ» ´Ù¾çÇÑ ¹æ¹ýÀ¸·Î È®°ø½ÃŰ´Â ±â¼úÀÌ °³¹ßµÇ¾î ÀÖÀ¸¸ç ÀÌ·¯ÇÑ ±â¼ú·Î ÀÎÇÏ¿© ´À½¼ÇÑ »çÁúÅä ¹× ¿¬¾à Á¡Åä¿¡¼­ ºñ±³Àû Å« ±ØÇÑÀι߷ÂÀ» È®º¸ÇÒ ¼ö ÀÖ°Ô µÇ¾ú´Ù. ƯÈ÷, ÃàÀûµÈ Àü±â¿¡³ÊÁö¸¦ ªÀº ½Ã°£¿¡ ¹æÀü½ÃŰ´Â ÆÞ½º¹æÀü °ø¹ýÀº ¾ÞÄ¿ Á¤ÂøÀåÀ» õ°ø ÄÉÀÌ½Ì ¶Ç´Â ºñÆ® Á÷°æº¸´Ù Å©°Ô È®°ø½ÃŰ´Â °ø¹ýÀÌ´Ù. ÃÑ 24°øÀÇ ¾ÞÄ¿¸¦ ¼º±Õ°ü ´ëÇб³ Áö¹Ý½ÃÇèÀå dzȭÅä ¹× ¸ð·¡Áú Á¡ÅäÃþ¿¡ ½Ã°øÇÏ¿´´Ù. ±ØÇÑÀι߷°ú ¾ÞÄ¿ È®°øºñ¿ÍÀÇ °ü°è¸¦ È®ÀÎÇϱâ À§ÇØ AASHTO¿¡¼­ ±ÔÁ¤Çϰí ÀÖ´Â ½ÃÇè¹æ¹ýÀ¸·Î Àι߽ÃÇèÀÌ ¼öÇàµÇ¾úÀ¸¸ç ÆÞ½º¹æÀü¿¡ ÀÇÇØ È®°øµÈ ¾ÞÄ¿ÀÇ Á÷°æÀ» È®ÀÎÇϱâ À§ÇØ 7°øÀÇ ¾ÞÄ¿¸¦ ±¼ÂøÇÏ¿´´Ù.
The ground anchor is not usually used in soft clay and loose sand, because the pullout resistance of anchors can not be guaranteed. However, there is a method to increase the capacity of anchors using electric discharge geotechnical technologies, which are also known as pulse discharge and electric-spark technologies. The pulse-discharge anchor has a bulbed (or underreamed) bond length that is expanded by high voltage electrokinetic pulse energy. 24 anchors were installed in the weathered soil and sandy clay at the Geotechnical Experimentation Site at Sungkyunkwan University in Suwon, Korea. In this study, in order to define a relation between expansion rate of the anchor diameter and ultimate load, anchor load tests were carried out in accordance with testing procedures by AASHTO (AASHTO 1990) and FHWA (Weatheb 1998). And then several anchors were exhumed to measure the diameter of the pulse discharge anchors.
 
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Bulbed anchor;Electric discharge;Expansion Ratio;Field test;Pullout load test;Pulse discharge;Ultimate load;Underreamed anchor;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.25, no.7, 2009³â, pp.5-10
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200927967092255)
¾ð¾î : Çѱ¹¾î
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