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Çѱ¹Áö¹Ý°øÇÐȸ / v.26, no.2, 2010³â, pp.15-22
°¡¾Ð ±×¶ó¿ìÆÃ ½îÀϳ×Àϸµ °ø¹ýÀÇ Àι߰ŵ¿ Ư¼º
( Pull-out Characteristics of Multi-Packer Pressurized Soil Nails )
Á¶À翬;À̼ºÁØ;Á¤»ó¼¶;¾Èº´Èç; ¿¬¼¼´ëÇб³ Åä¸ñ°øÇаú;¿¬¼¼´ëÇб³ Åä¸ñ°øÇаú;¿¬¼¼´ëÇб³ Åä¸ñ°øÇаú;½Ådz°Ç¼³ÅÏÆ®;
 
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º» ¿¬±¸¿¡¼­´Â ÇöÀå Àι߽ÃÇèÀ» ÅëÇÏ¿© °­°ü´Ù´Ü °¡¾Ð½Ä ½îÀϳ×ÀϸµÀÇ °Åµ¿Æ¯¼ºÀ» ºÐ¼®ÇÏ¿´´Ù. À̸¦ À§ÇÏ¿© ÃÑ 10°øÀÇ ½îÀϳ×ÀÏÀ» dzȭÅä¿¡ ½Ã°øÇÏ¿© Àι߽ÃÇèÀ» ½Ç½ÃÇÏ¿´´Ù. Àι߽ÃÇè °á°ú¿¡ ÀÇÇÏ¸é ½îÀϳ×ÀÏÀÇ ±ØÇÑÀι߷ÂÀº °¡¾Ð½Ä ½îÀϳ×ÀÏÀÌ Áß·Â½Ä ½îÀϳ×ÀÏ¿¡ ºñÇÏ¿© 42~142% Áõ°¡ÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ³×Àϰú ÁÖº¯Áö¹Ý °æ°è¸é¿¡¼­ÀÇ Àü´Ü°­µµ´Â Áß·Â½Ä ³×ÀÏÀÌ 71kPa, °¡¾Ð½Ä ³×ÀÏÀÌ 95~166kPa¸¦ º¸ÀÌ´Â °ÍÀ¸·Î È®ÀεǾú´Ù. °¡¾Ð½Ä ½îÀϳ×ÀÏÀÇ °æ¿ì Áß·Â½Ä ½îÀϳ×ÀÏ¿¡ ºñÇÏ¿© ±×¶ó¿ìÆ®ÀÇ Á÷°æÀÌ ¾à 12~27% Áõ°¡ÇÏ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ¶ÇÇÑ, °øÆØÃ¢À̷п¡ ÀÇÇÑ °¡¾Ð ½Ã Áö¹Ýº¯À§ »êÁ¤°ª°ú ÇöÀå Àι߽ÃÇèÀ» ÅëÇÏ¿© ÃøÁ¤ÇÑ °ªÀ» ºñ±³ÇÏ¿´À¸¸ç, ±× °á°ú´Â ´ëüÀûÀ¸·Î ºñ½ÁÇÑ °æÇâÀ» º¸¿´´Ù.
A series of field pull-out tests were carried out to investigate the behaviour of multi-pressurized soil nails. Ten soil nails were constructed in weathered soil and then, subjected to pull-out loads. The test results showed that the ultimate pull-out resistances of soil nails constructed with high pressure were about 42~142% larger than those obtained from conventional soil nails. The deduced interface shear strength at the ground-grout interface was 71 kPa for conventional soil nails, while higher shear strength of 95~166 kPa was obtained for pressurized nails. The diameter of grouted borehole increased by about 12~27% compared to ordinary soil nails under low pressure. Also, the predicted value by the cavity expansion theory is in good agreement with the measured expanded radius of grout under injection pressure by field pull-out tests.
 
Ű¿öµå
Cavity expansion;Expanded radius of grout;Field pull-out;Pressurized soil nail;Pullout resistance;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.26, no.2, 2010³â, pp.15-22
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201023064630781)
¾ð¾î : Çѱ¹¾î
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