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Çѱ¹Áö¹Ý°øÇÐȸ / v.16, no.1, 2000³â, pp.211-220
ÀÏ¹Ý ÇöÀå Ÿ¼³ ¸»¶Ò°ú ºÐ¸®Çü ÇöÀå Ÿ¼³ ¸»¶ÒÀÇ °Åµ¿ ºñ±³
( Comparison of Performance between Regular Drilled Shaft and Isolation Tube Drilled Shafts )
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°ú¾Ð¹Ð Á¡ÅäÃþ¿¡ ¼³Ä¡µÈ 4°³ÀÇ Á÷°æ 305 mm ÇöÀ埼³ ¸»¶Ò(1°³ÀÇ ÀÏ¹Ý ÇöÀ埼³ ¸»¶Ò°ú ºÒÆ÷È­ Á¡ÅäÃþ¿¡¼­ ¹ß»ýÇÏ´Â ÁÖ¸é ¸¶Âû·ÂÀ» °æ°¨½Ã۱â À§ÇØ ºÐ¸®Çü Æ©ºê¸¦ »ç¿ëÇÑ 3°³ÀÇ ºÐ¸®Çü ÇöÀ埼³ ¸»¶Ò)ÀÇ °Åµ¿À» ºÐ¼® ºñ±³Çϱâ À§ÇÑ ½ÇÇèÀû ¿¬±¸¸¦ ¼öÇàÇÏ¿´´Ù. Èí¼ö·Â ÃøÁ¤À» Çϱâ À§ÇØ ¸»¶Ò ÁÖº¯¿¡ Áö¹ÝÈí¼ö·Â ÃøÁ¤ ÀåÄ¡¸¦ ¼³Ä¡ÇÏ¿´°í ÁöÇ¥¸é Ç¥°í º¯È­µµ ÃøÁ¤ÇÏ¿´´Ù. ÁöÇ¥¸é Ç¥°í´Â ÃÖ°í 40 mm±îÁö ÆØÃ¢ÇÏ¿´°í, ÀÏ¹Ý ¸»¶ÒÀº 5 mm, ºÐ¸®Çü ¸»¶ÒÀº 1.5 mm ¹Ì¸¸ÀÇ ¸»¶Ò µÎºÎ ¼öÁ÷Àιߺ¯À§°¡ °üÃøµÇ¾ú´Ù. ºÐ¸®Çü ¸»¶Ò¿¡¼­ °üÃøµÈ Áָ鸶Âû·ÂÀº ÀϹÝÇü ¸»¶Ò¿¡ ºñÇØ ¹Ì¼ÒÇÏ¿© ºÐ¸®Çü Æ©ºê¸¦ »ç¿ëÇÑ ºÐ¸®Çü ÇöÀ埼³ ¸»¶ÒÀÌ ÁÖÀ§ Áö¹ÝÀÇ ÆØÃ¢ ¼öÃà¿¡ ÀÇÇØ ¸»¶Ò¿¡ ¹ß»ýÇÏ´Â ÁÖ¸é ¸¶Âû·ÂÀ» °æ°¨½Ã۴µ¥ ¸Å¿ì È¿°úÀûÀ̾ú´Ù.
An experimental study that included detailed observation of four 305-mm-diameter drilled shafts, one reference shaft of standard design and three test shafts with isolation tubes to mitigate skin friction in the vadose zone of a clay soil profile, is described. The shafts were loaded only by naturally expanding and contraction soil over a period of 17 months. The soil at the test site was instrumented to track suction and elevation changes. Maximum ground surface movements exceeding 40 mm were observed. Heave movements of less than 1.5 mm were observed in the test shafts with isolation tubes, while movements of 5 mm were observed in the reference shaft. Unit side shear loads in the shafts protected by the isolation tubes were minimal compared to those measured in the reference shaft. This indicates that the isolation tubes were very effective.
 
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Expansive soil;Drilled shaft;Isolation tube;Suction;Swell;Clay;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.16, no.1, 2000³â, pp.211-220
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200011921750189)
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