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Çѱ¹Áö¹Ý°øÇÐȸ / v.19, no.6, 2003³â, pp.161-168
ÆÄ±«¿ªÇÐÀ» ÀÌ¿ëÇÑ °æÈ­¸ð·¡·Î ÀÌ·ç¾îÁø »ç¸éÀÇ ÇØ¼®
( Analysis of Steep Cuts and Slopes in Cemented Sand Using Fracture Mechanics )
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´ëºÎºÐÀÇ ÀÚ¿¬»óÅÂÀÇ »çÁúÅä´Â ¾î´À Á¤µµ °æÈ­µÇ¾î ÀÖ´Ù. °æÈ­ÀÇ Á¤µµ´Â ÈëÀÇ Ã¼Àûº¯Çü °Åµ¿À̳ª °­µµ¿¡ Áß¿äÇÑ ¿µÇâÀ» ÁØ´Ù. °æÈ­µÈ »çÁúÅä Áö¹ÝÀÇ Áß¿äÇÑ Æ¯Â¡Àº »çÁúÅäÀÓ¿¡µµ ºÒ±¸ÇÏ°í ±²ÀåÈ÷ ³ôÀÌ ¼­ ÀÖÀ» ¼ö ÀÖ´Ù´Â °ÍÀÌ´Ù. ¸¹Àº ÇöÀå °üÃøÀ̳ª °æÈ­¸ð·¡·Î µÈ »ç¸éÀÇ ÆÄ±« ÇØ¼®µéÀº ±âÁ¸ÀÇ »ç¸éÇØ¼®¹æ¹ýÀÌ ÀûÀýÇÏÁö ¾Ê´Ù´Â °ÍÀ» º¸¿©ÁØ´Ù. À̰ÍÀº ´ÜÁö ÆÄ±«¸éÀÌ ¿øÈ£°¡ ¾Æ´Ï¶ó´Â Á¡»Ó¸¸ ¾Æ´Ï¶ó ÆÄ±«¸é¿¡¼­ÀÇ Àü´ÜÀÀ·ÂÀÌ ½ÇÇèÀ¸·ÎºÎÅÍ ¾ò¾îÁø Àü´Ü°­µµº¸´Ù ÈξÀ À۱⠶§¹®ÀÏ °ÍÀÌ´Ù. ÀÌ·¯ÇÑ »ç½ÇÀº ÆÄ±«¾ç»óÀÌ Mohr-Coulomb Àü´ÜÆÄ±«¿Í ´Ù¸£´Ù´Â °ÍÀ» ¸»ÇÑ´Ù. ÀÌ·± ÆÄ±«´Â ÆÄ±«¿ªÇÐ °³³ä°ú ÀÌ·ÐÀ¸·Î ¼³¸íµÉÁöµµ ¸ð¸¥´Ù. ÀÌ ³í¹®¿¡¼­´Â ÆÄ±« ¿ªÇÐ °³³äÀ» ÀÌ¿ëÇØ¼­ °æÈ­¸ð·¡·Î ÀÌ·ç¾îÁø ±Þ°æ»ç »ç¸éÀÇ ÇØ¼®À» ¼öÇàÇÏ¿´´Ù. FEM ÇØ¼® °á°ú´Â ÆÄ±«¿ªÇÐÀÇ °³³äÀ» ÀÌ¿ëÇÑ ÇØ¼®¹æ¹ýÀÌ °æÈ­»çÁúÅä·Î ÀÌ·ç¾îÁø Áö¹Ý±¸Á¶¹°ÀÇ ¼³°è³ª ¾ÈÁ¤Çؼ®¿¡ ÈǸ¢ÇÑ ´ë¾ÈÀÓÀ» º¸¿©ÁÖ°í ÀÖ´Ù.
Most natural deposits of sandy soil possess some degree of cementation resulting from the deposition and precipitation of cementing agents. The presence of cementation can have a significant influence on the stiffness and volume change behavior, and the strength of soils. An important feature of deposits of cemented sandy soils is their ability to remain stable in surprisingly high and almost vertical man-made cuts as well as natural slopes. Numerous field observations and studies of failures in slopes of cemented soils have reported that application of conventional analysis techniques of slope stability is inadequate. That is not only due to the fact that the failure surface of the slope is not circular, but also the fact that the average shear stress along the failure surface is much smaller than the shear strength measured in laboratory shear experiments. This observation alerts us to the fact that a mechanism different from conventional Mohr-Coulomb shear failure takes place, which may be related to fracture processes, which in turn are governed by fracture mechanics concepts and theory. In this study, steep slopes in cemented sand were assessed using fracture mechanics concepts. The results showed that FEM coupled with fracture mechanics concepts provides an excellent alternative in the design and safety assessment of earth structures in cemented soils.
 
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Cementation;FEM;Fracture mechanics;Mohr-Coulomb;Slopes;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.19, no.6, 2003³â, pp.161-168
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200311922147947)
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