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Çѱ¹Áö¹Ý°øÇÐȸ / v.23, no.11, 2007³â, pp.49-58
PFC¸¦ ÀÌ¿ëÇÑ Ä§Åõ±×¶ó¿ìÆÃ½Ã ¹Ì¼¼ÀÔÀÚÀÇ À̵¿ ¹× Àü´Ü°­µµÁõ°¡ ÇØ¼®
( Analysis of Fine Particle Transfer and Shear Strength Increase Using PFC in Permeation Grouting )
ÀÌ¿ÏÈ£;ÀÓÈñ´ë; Ãæ³²´ëÇб³ °ø°ú´ëÇÐ Åä¸ñȯ°æ°øÇкΠÅä¸ñ°øÇаú;Ãæ³²´ëÇб³ °ø°ú´ëÇÐ Åä¸ñȯ°æ°øÇкΠÅä¸ñ°øÇаú;
 
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ħÅõ±×¶ó¿ìÆÃ½Ã ¹Ì¼¼ÀÔÀÚÀÇ À̵¿ ¸ÞÄ«´ÏÁò°ú ¹Ì¼¼ÀÔÀÚµéÀÇ °£±Ø ÃæÁø ÈÄ °­µµÁõ°¡ »óŸ¦ ÆÄ¾ÇÇϱâ À§ÇØ PFC3D¸¦ ÀÌ¿ëÇÑ ¼öÄ¡ÇØ¼®À» ¼öÇàÇÏ¿´´Ù. ÇØ¼®À» À§ÇÏ¿© ¾÷½ºÄÉÀϸµ ±â¹ýÀ» ÀÌ¿ëÇÏ¿´À¸¸ç ¿¬±¸¸¦ ÅëÇØ ´ÙÀ½°ú °°Àº »ç½ÇµéÀÌ °üÂûµÇ¾ú´Ù. ù°, ÅäÃþ ÀÔÀÚ¿¡ ´ëÇÑ ±×¶ó¿ìÆÃ ¹Ì¼¼ ÀÔÀÚÀÇ »ó´ëÀû Å©±â°¡ 0.05¹è¿¡¼­ 0.25¹è·Î Áõ°¡Çϸ鼭 ÀÔÀÚÀÇ À̵¿ÀÌ Á¦ÇÑÀ» ¹Þ°Ô µÈ´Ù. ƯÈ÷, 0.20¹è ¶Ç´Â 0.25¹èÀÇ ±×¶ó¿ìÆÃ ¹Ì¼¼ÀÔÀÚÀÇ °æ¿ì, ÅäÃþ ÀÔÀÚµé °£ÀÇ °ø±ØÀÌ Çϳª ¶Ç´Â ´Ù¼öÀÇ ¹Ì¼¼ÀÔÀڵ鿡 ÀÇÇØ ¸·È÷±â ¶§¹®¿¡ ¹Ì¼¼ÀÔÀÚÀÇ À̵¿ÀÌ °ÅÀÇ ¾ø´Ù. ¶ÇÇÑ 0.05¹è¿Í 0.10¹èÀÇ °æ¿ì, ÀÔÀÚÀÇ À̵¿·®ÀÌ °ÅÀÇ À¯»çÇϹǷΠÀÔÀÚ Å©±â°¡ °¨¼ÒµÇ¾îµµ ±×¶ó¿ìÆÃ È¿°úÀÇ ÁõÁøÀº ÇѰ谡 ÀÖ´Ù. µÑ°, ħÅõ±×¶ó¿ìÆÃ Àü°ú ÈÄÀÇ ¼öÄ¡½Ã·á¿¡ ´ëÇÑ ¹°¼º ½ÇÇèÀ» ÇÑ °á°ú Á¡Âø·Â°ú ¸¶Âû°è¼ö°¡ Áõ°¡ÇÔÀÌ È®ÀεǾú´Ù.
Numerical experiments using a distinct element code (PFC3D) were carried out for the analysis of grout-material transfer in soil layers and also for the analysis of increase in mechanical strength after permeation grouting. For rapid analysis, up-scaling analysis in length scale was adopted, and the following observations were made from the numerical experiments. Firstly, the relative size of grout material with respect to the in situ soil particles controlled the transfer distance of the grout particles. When the size of grout particle was 0.2 to 0.25 times of the in situ soil particles, clogging of pore spaces among the in situ soil particles occurred, resulting in restricted propagation of grout particles. It was also found that there was a threshold value in the size of grout particle. Below the threshold value, the transfer distance of the grout particle did not increase with the decrease of particle size of the grout material. Secondly, the increase in cohesion and internal friction angle was observed in the numerical specimen with grouting treatment, but not with the untreated specimen.
 
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Distinct Element Method;Motion of Fine Grout Particles;Permeation Grouting;Up-scaling;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.23, no.11, 2007³â, pp.49-58
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200706414119078)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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