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Çѱ¹Áö¹Ý°øÇÐȸ / v.18, no.3, 2002³â, pp.33-41
ÇöÀå°èÃø°ú ¿ªÇؼ®¿¡ ÀÇÇÑ ³×ÀÏÀÇ ÀÎÀå·Â ºñ±³ ¿¬±¸
( Comparison of Nail Tensile Force by Feed Back Analysis rind Measurements )
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½îÀϳ×Àϸµ °ø¹ýÀº ±¼ÂøÀ̳ª »ç¸é¾ÈÁ¤À» À§ÇØ °¡½Ã¼³À̳ª ¿µ±¸¿ëÀ¸·Î ±¹³»¿¡¼­ ³Î¸® ÀÌ¿ëµÇ°í ÀÖ´Ù. ƯÈ÷, µµ½ÉÁö ±ÙÁ¢ ±¼Âø½Ã ½îÀϳ×Àϸµ °ø¹ý Àû¿ë½Ã °í·Á»çÇ×Àº º®Ã¼º¯À§¿Í ³×ÀÏÀÇ ÀÎÀåµî ÀÌ´Ù. º» ¿¬±¸´Â ±¹³» ¿©·¯ ¾Ï¹ÝÃþÀ» Æ÷ÇÔÇÏ´Â ´ÙÃþÅä Áö¹ÝÀÇ 11°³ ½îÀϳ×Àϸµ ÇöÀå¿¡¼­ ±¼Âø´Ü°èº° ³×ÀÏÀÇ ÀÎÀå·Â °Åµ¿À» °èÃøÀÚ·á¿Í ¿ªÇؼ®À» ÅëÇÏ¿© °íÂûÇÏ¿´´Ù. ¿ªÇؼ® °á°ú ³×ÀÏÀÇ ÃÖ´ëÀÎÀå·ÂÀº °èÃø°ªÀÇ 50% Á¤µµ·Î ³·°Ô ³ªÅ¸³µ°í, º®¸é¿¡¼­ °¡»ó ÆÄ±«È°µ¿¸é±îÁöÀÇ °Å¸®¸¦ ÁÖµ¿¿µ¿ª°Å¸®¶ó ÇÒ¶§ CLOUTERRE º¸°í¼­¿Í Cartier & GiganÀÌ °¢°¢ Á¦¾ÈÇÑ ÃÖÁ¾±¼Âø ±íÀÌ(H$_{f}$ )ÀÇ 0.3$H_f$,0.5$H_f$,¿¡ ºñÇØ °èÃø°á°ú´Â Å©°Ô ³ªÅ¸³µÀ¸¸ç, ¿ªÇؼ®Àº À̵éÀÌ Á¦¾ÈÇÑ ¹üÀ§³»¿¡ Æ÷ÇԵǾú´Ù.
Soil nailing type of retaining structures has been widely used in Korea far the purpose of the temporary and permanent support in excavations and slope stability. The important factors in application of soil nailing systems in urban excavation site nearby the existing structures are the displacement of the wall and tensile farce of the nails, etc. In this paper, the fled back analyses are carried out at 11 excavation sites to investigate the behavior of tensile farce of nails at stepwise excavation in the multi-layered strata including various rock layers. The results of the fled back analysis are less than about 50% of the measured ones. The distance of active zone by measurements are shown almost larger than that of fled back analysis when the distance of active Bone is defined from the surface of wall to the potential failure surface. And the results of fled back analysis are within the range proposed by the project CLOUTERRE and Cartier & Gigan (1983) which were 0.3$H_f$, and 0.5$H_f$, of the final excavation depth ($H_f$,) respectively, but the values of the measurement were larger than these values.
 
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Active zone;Feed bak analysis;Measurement;Multi-layer;Nail;Potential failure surface;Stepwise excavation;Tensile force;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.18, no.3, 2002³â, pp.33-41
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200211921035324)
¾ð¾î : ¿µ¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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