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Çѱ¹Áö¹Ý°øÇÐȸ / v.22, no.6, 2006³â, pp.5-13
°­º¸°­Àç·Î º¸°­µÈ ½ÇÆ®Áú ¸ð·¡ÀÇ ¹è¼ö ¹× ºñ¹è¼ö Àι߷Â
( Drained and Undrained Pullout Capacity in Steel Strip Reinforced Silty Sands )
ÀÌÈ«¼º; Çö´ë°Ç¼³ ±â¼ú¿¬±¸¼Ò;
 
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ÁöÇϼö ±Þ¼ÓÀúÇÏ¿Í °°Àº ºñ¹è¼ö »óÅ¿¡¼­´Â Èë°ú º¸°­Àç »çÀÌÀÇ °æ°è¸é(interface)¿¡¼­ ¹ß»ýÇÏ´Â °úÀ×°£±Ø¼ö¾ÐÀ¸·Î ÀÎÇÏ¿© À¯È¿ÀÀ·ÂÀÌ °¨¼ÒÇÒ ¼öµµ ÀÖÀ¸¸ç, ÀÌ´Â º¸°­ÀçÀÇ Àι߷ °¨¼Ò·Î À̾îÁö±âµµ ÇÑ´Ù. º» ¿¬±¸¿¡¼­´Â °¢±â ´Ù¸¥ Á¾·ùÀÇ Èë(¼ø¼ö¸ð·¡, 5, 10, 15, 35% ½ÇÆ®Áú ¸ð·¡)°ú »óÀçÇÏÁß(30, 100, 200kPa)À» ´ë»óÀ¸·Î ¹è¼ö ¹× ºñ¹è¼ö ½Ç³»Àι߽ÃÇèÀ» ½Ç½ÃÇÏ¿© ÃÖ´ë ¹è¼öÀι߷°ú ÃÖ´ë ºñ¹è¼öÀι߷ÂÀ» ¼­·Î ºñ±³ÇÏ¿´´Ù. ½ÃÇè°á°ú ¹è¼öÀι߷°ú ºñ¹è¼öÀι߷ ¸ðµÎ ½ÇÆ® ÇÔÀ¯·®¿¡ ÀÇÇØ ¿µÇâÀ» ¹Þ°í, ÈëÀÇ ³»ºÎ¸¶Âû°¢ÀÌ Áõ°¡ÇÔ¿¡ µû¶ó Àι߷ ¶ÇÇÑ Áõ°¡ÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¶ÇÇÑ, »óÀçÇÏÁßÀÌ Áõ°¡ÇÔ¿¡ µû¶ó Àι߷µµ Áõ°¡ÇÏ¿´À¸¸ç, ÃÖ´ëÀι߷¿¡ µµ´ÞÇϴµ¥ ¼Ò¿äµÇ´Â Àι߰Ÿ®µµ Áõ°¡ÇÏ¿´´Ù. ºñ¹è¼ö ½ÃÇè¿¡¼­´Â °úÀ×°£±Ø¼ö¾ÐÀÌ ¹ß»ýÇÔ¿¡ µû¶ó º¸°­Àç¿¡ ÀÛ¿ëÇÏ´Â À¯È¿ÀÀ·ÂÀÌ °¨¼ÒÇÏ¿´À¸¸ç, ±× °á°ú ¹è¼ö Á¶°Ç°ú ºñ±³ÇÏ¿© Àι߷°ú Àι߰Ÿ®°¡ °¨¼ÒÇÏ¿´´Ù.
Effective stresses may decrease due to generation of excessive pore pressure at the interface between soil and reinforcement in undrained condition such as rapid drawdownof groundwater level, resulting in the decrease in pullout capacity of the reinforcement. In this research, a series of laboratory pullout tests have been performed on different materials (clean sand, 5, 10, 15 and 35% silty sand), different overburden pressures (30, 100 and 200 kPa), and different drainage conditions (drained and undrained) in order to compare drained pullout capacity with undrained pullout capacity. The test results show that both drained and undrained pullout capacity are influenced by silt contents and increase with the increase of friction angle of the soil. The pullout capacity and the pullout displacement required to reach the peak value also increase as the overburden pressure increases. In undrained condition, the effective stresses acting on the reinforcement decrease as excessive pore pressures are generated, resulting in the decrease in pullout capacity and pullout displacement.
 
Ű¿öµå
Drained;Pullout capacity;Pullout test;Reinforced soil;Undrained;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.22, no.6, 2006³â, pp.5-13
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200633242257021)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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