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Çѱ¹Áö¹Ý°øÇÐȸ / v.20, no.7, 2004³â, pp.171-181
Èë-¼öºÐ Ư¼º °î¼±À» ÀÌ¿ëÇÑ ºÒÆ÷È­¸ð·¡ÀÇ ÀÎÀå°­µµ ¸ðµ¨¸µ
( Modeling of the Tensile Strength of Unsaturated Granular Soil Using Soil-water Characteristic Curve )
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º» ¿¬±¸´Â ºÒÆ÷È­ »óÅ Àü ¹üÀ§¿¡ ´ëÇÑ »çÁúÅäÀÇ ÀÎÀå°­µµ ¸ðµ¨È­ °¡´É¼ºÀ» Á¶»çÇϱâ À§ÇØ ½Ç½Ã µÇ¾ú´Ù. »õ·Î °³¹ßµÈ Á÷Á¢ÀÎÀå½ÃÇè±â¹ýÀ» ÀÌ¿ëÇÏ¿© ÀÎÀå½ÃÇèÀÌ ½Ç½ÃµÇ¾ú´Ù. ÃøÁ¤µÈ °á°ú´Â Rumpf ¹× Schubert°¡ µ¿ÀÏÅ©±âÀÇ ÀÌ»óÀûÀÎ ±¸¿¡ ´ëÇØ °³¹ßÇÑ ÀÌ·ÐÀûÀÎ ÀÎÀå°­µµ ¸ðµ¨µé¿¡ ÀÇÇÑ ¿¹Ãø °ª°ú ºñ±³ µÇ¾ú´Ù. À̸¦ À§ÇØ ¼®¼Ç-Æ÷È­½ÇÇèÀ» ÅëÇØ ¾ò¾îÁø Èë-¼öºÐƯ¼º°î¼±À» ÀÌ¿ëÇÏ¿© À̷и𵨿¡ ÀÖ¾î Áß¿äÇÑ ¿ä¼ÒÀÎ ºÒÆ÷È­»óÅÂ(pendular, funicular, capillary) ±¸ºÐ ¹× À½ÀÇ °£±Ø¼ö¾Ð °ªÀ» »êÁ¤Çϴµ¥ »ç¿ëÇÏ¿´´Ù. Pendular »óÅ¿¡¼­ ºÒÆ÷È­¸ð·¡ÀÇ ºñ¼±Çü °Åµ¿ÀÌ RumpfÀÇ ¸ðµ¨¿¡ ÀÇÇØ ÀûÀýÀÌ ¹¦»çµÇ¾ú´Ù. Funicular ¹× capillary»óÅÂÀÇ °æ¿ì, ÇÔ¼öºñ°¡ Áõ°¡ÇÔ¿¡ µû¶ó ÀÎÀå°­µµ°¡ Áõ°¡ÇÏ´Ù ÃÖ°í °ªÀÌ µµ´ÞÇÑ ÈÄ ´Ù½Ã °¨¼ÒÇÏ´Â ½ÇÇè ÃøÁ¤Ä¡ÀÇ °æÇâµµ SchubertÀÇ ¸ðµ¨¿¡ ÀÇÇØ ÀûÀýÈ÷ ¹¦»çµÇ¾ú´Ù. º» ºñ±³ ¿¬±¸´Â ÀÌ»óÀûÀÎ ´ÜÀÏ Å©±âÀÇ ÀÔÀÚ¿¡ ´ëÇØ °³¹ßµÈ ÀÌ·ÐÀûÀÎ ¸ðµ¨ÀÌ ´Ù¾çÇÑ Å©±â¸¦ °®´Â ºÒÆ÷È­ »çÁúÅäÀÇ ÀÎÀå°­µµ¸¦ ¿¹ÃøÇÒ ¼ö ÀÖ´Ù´Â °¡´É¼ºÀ» µÞ¹ÞÄ§ÇØÁØ´Ù.
This study was conducted to explore the tensile strength models in granular soil at the full range of unsaturated state. Direct tension experiments were carried out with a newly developed direct tension technique. The measured experimental data were compared with theoretical models developed by Rumpf and Schubert for monosized ideal particulate solids at the unsaturated state. To do this, the soil-water characteristic curve obtained from a suction-saturation experiment was used to define the unsaturation state and the negative pore water pressure with different water content levels, which are important factors in theoretical tensile strength models. The nonlinear behavior of the tensile strength for unsaturated granular soil at the pendular state is appropriately simulated with Rumpf's model. For the funicular and capillary states, the predicted trend by Schubert's model is properly matched with the experimental data: tensile strength steadily increases and reaches a maximum value and then decreases until it reaches zero. This comparison supports the concept that the tensile strength of unsaturated real granular soil can be approximately simulated with theoretical models.
 
Ű¿öµå
Soil-water characteristic curve;Suction-saturation;Tensile strength;Unsaturated state;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.20, no.7, 2004³â, pp.171-181
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200425720311288)
¾ð¾î : ¿µ¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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