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Çѱ¹Áö¹Ý°øÇÐȸ / v.20, no.5, 2004³â, pp.5-16
Åä¸ñ¼¶À¯·Î º¸°­µÈ ´ÙÁüÅä °ø½ÃüÀÇ ±¸¼ÓÈ¿°ú °üÇÑ ¿¬±¸
( A Study on the Confining Effect Due to Geosynthetics Wrapping Compacted Soil Specimen )
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º» ¿¬±¸¿¡¼­´Â Åä¸ñ¼¶À¯·Î º¸°­µÈ ´ÙÁüÅäÀÇ º¸°­ ¸ÞÄ«´ÏÁòÀÌ Á¦½ÃµÇ¸ç, ÀÌ·¯ÇÑ º¸°­ ¸ÞÄ«´ÏÁòÀº ´ÙÁüÅäÀÇ Ã¼ÀûÆØÃ¢(ºÎÀÇ ´ÙÀÏ·¯Åº½Ã)À» Åä¸ñ¼¶À¯¿¡ ÀÇÇØ ±¸¼Ó ¾ïÁ¦ÇÏ´Â °úÁ¤¿¡¼­ »ý¼ºµÇ´Â È¿°ú·Î °£ÁֵȴÙ. ¸ÕÀú, ½Ç³»½ÇÇèÀ» À§ÇÑ ±¸Ã¼ÀûÀÎ ¹æ¹ýÀ¸·Î¼­, Åä¸ñ¼¶À¯ÀÇ º¸°­È¿°ú¸¦ Á¤·®ÀûÀ¸·Î ÆÄ¾ÇÇϱâ À§ÇÏ¿© »çÁúÅ並 ´ÙÁüÇÏ¿© °ø½Ãü¸¦ ¸¸µé¾î ±× ÁÖÀ§¿¡ Åä¸ñ¼¶À¯¸¦ ¼³Ä¡ÇÑ ÈÄ ÀüüÀûÀ¸·Î ¾ÐÃàÀü´Ü½ÃÇèÀ» ½Ç½ÃÇÏ¿´´Ù. ½ÇÇè¿¡¼­ Ãʱ⠴ÙÁüµµ´Â °¢°¢ÀÇ Á¾·ù¿¡ ´ëÇÏ¿© ´ÙÀÏ·¯Åº½ÃÀÇ Æ¯¼ºÀÌ ´Ù¸£±â ¶§¹®¿¡ °¢°¢ÀÇ °ø½Ãü¿¡ ´ëÇÏ¿© º¯È­½ÃÄ×´Ù. ¿©±â¼­ Àü´Ü½ÃÇè µµÁß¿¡ ´ÙÁüÅäÀÇ ´ÙÀÏ·¯Åº½Ã º¯ÇüÀ» ¹æÁöÇϱâ À§ÇÑ Åä¸ñ¼¶À¯¿¡ ÀÛ¿ëÇÏ´Â Ãà¹æÇâ Èûµé(axial forces)ÀÌ Á¶»çµÇ¾ú´Ù. ¶ÇÇÑ ´ÙÁüÅäÀÇ Åº¼Ò¼º ¸ðµ¨°ú ÀÌ·¯ÇÑ ¸ðµ¨¿¡ ÇÊ¿äÇÑ Ãʱâ ÀÔ·ÂÄ¡ °ªÀÇ °áÁ¤ ¹æ¹ýµéÀÌ Á¦½ÃµÈ´Ù. ¸¶Áö¸·À¸·Î, ź¼Ò¼º ±¸¼º ¸ðµ¨¿¡¼­ Ç׺¹ ÀÌÀüÀÇ Åº¼º ¿µ¿ªÀÇ °Åµ¿À» ¸ð»çÇϱâ À§ÇÏ¿© Hashiguch(1989)°¡ Á¦¾ÈÇÑ subloading surfaceÀÇ °³³äÀ» µµÀÔÇÏ¿©, À¯ÇÑ¿ä¼Ò(FEM) ÇØ¼®À» ÅëÇØ ¾ò¾îÁø °á°úµéÀ» ½Ç³»½ÃÇèÀÇ °á°ú¿Í ºñ±³ ºÐ¼®ÇÏ¿´´Ù.
This paper presents the modeling of geosynthetic-reinforced compacted soils and discusses the reinforcement effect arising from confining the dilatancy deformation of the soil by geosynthetics. A series of compressive shear tests for compacted sandy soil specimens wrapped by geosynthetics are carried out by quantitatively examining the geosynthetic-reinforcement effect, occurring from a confinement of the dilative deformation in compacted soils during shearing. In the test, the initial degree of compaction is changed for each series of sandy soil specimens so that each series has different degree of dilatancy characteristics. Herein, the axial forces working on the geosynthetics so as to prevent dilative deformation of compacted soils during shearing are measured. Furthermore, the elasto-plastic modeling of compacted soils and a rational determination procedure for input parameters needed in the elasto-plastic modeling are presented. And to describe the irreversible deformation characteristics of compacted soils during shearing, the subloading yielding surface (Hashiguchi (1989)) to the elasto-plastic modeling is introduced. Finally, the elasto-plastic finite element simulation is carried out and the geosynthetic-reinforcement effect is discussed.
 
Ű¿öµå
Compacted soils;Elasto-plastic modeling;Geosynthetic-reinforcement;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.20, no.5, 2004³â, pp.5-16
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200411922462033)
¾ð¾î : ¿µ¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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