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Çѱ¹Áö¹Ý°øÇÐȸ / v.24, no.12, 2008³â, pp.65-73
»ç¸é ¾ÈÁ¤ ¹®Á¦¿¡ ´ëÇÑ Á÷Á¢ Àü´Ü ½ÃÇèÀÇ °øÇÐÀû Àû¿ë
( Engineering Application of Direct Shear Box Test for Slope Stability Problem )
ÀÌÄÉÁö¸®Ä«Ã÷Åä½Ã;½ÃºÎ¾ß»çÅä·ç;Á¤¹Î¼ö;äÁ¾±æ; °íº£´ëÇб³ °øÇבּ¸°ú ½Ã¹Î°øÇÐ;°íº£´ëÇб³ °øÇבּ¸°ú ½Ã¹Î°øÇÐ;°íº£´ëÇб³ °øÇבּ¸°ú ½Ã¹Î°øÇÐ;°íº£´ëÇб³ µµ½Ã¾ÈÀü¿¬±¸¼¾ÅÍ;
 
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ÇöÀç ÀϺ»¿¡¼­´Â »ç¸é ¾ÈÁ¤ ¹®Á¦¿¡ À־ ÆÄ±«¸é»óÀÇ Àü´Ü°­µµ´Â ÀϹÝÀûÀ¸·Î Á¡Âø·ÂÀÇ °æÇèÀû ¿¹Ãø¿¡ ±âÃʸ¦ µÎ°í ÀÖÀ¸¸ç, ±× Á¡Âø·ÂÀº Ç¥Åä»óºÎ¿¡¼­ °¡Á¤ÇÑ È°µ¿ ¸é±îÁö ÈëµÎ²²¿¡ ºñ·ÊÇÑ´Ù°í °¡Á¤ÇÑ´Ù. ÀÌ ¿¹Ãø¹ýÀº ¾ÈÁ¤Çؼ® °á°ú°¡ ¼³°èÀÚ¿¡ ÀÇÇÑ ¿µÇâÀ» ¹ÞÁö ¾Ê´Â´Ù´Â Á¡ÀÌ ÀÌÁ¡À̳ª, ÀÌ·ÐÀûÀÎ ¹è°æÀÌ ºÎÁ·Çϰí, ÆÄ±«¸é »óÀÇ ÈëµÎ²²°¡ ¸Å¿ì µÎ²¨¿î °æ¿ì¿¡´Â Á¡Âø·ÂÀÌ °ú´ÙÆò°¡µÇ¾î ¿ªÀ¸·Î ¶§¶§·Î ±×·Î ÀÎÇÑ Àü´ÜÀúÇ×°¢ÀÌ °ú¼ÒÆò°¡µÇÁö±âµµ ÇÑ´Ù. º» ¿¬±¸¿¡¼­´Â 2007³â È¿°íÇöÀÇ ÀÚ¿¬»ç¸é ÆÄ±«»ç·Ê¸¦ ´ë»óÀ¸·Î ÆÄ±«¸é»óÀÇ ÇöÀåÀü´ÜÀÀ·ÂÀÇ È¿°ú¸¦ °í·ÁÇÑ ÀÏ·ÃÀÇ Á÷Á¢Àü´Ü½ÃÇèÀ» ½Ç½ÃÇÏ¿© ÁÖÀÇ ±í°Ô Á¶»çÇÏ¿´´Ù. ±× °á°ú, ÃʱâÀü´ÜÀ½·ÂÀ» °í·ÁÇÑ ½ÃÇèÀ¸·ÎºÎÅÍ ±¸ÇÑ Àü´Ü°­µµ°¡ »ç¸éÆÄ±«ÀÇ ¿ªÇؼ®¿¡ Àû¿ëµÇ¾úÀ» ¶§ÀÇ ¾ÈÀü·üÀÌ ÇöÀå»óȲ°ú ºÎÇÕÇϰí ÀÖÀ½À» ¾Ë ¼ö ÀÖ¾ú´Ù.
In the current practice for slope stability problem in Japan, the shear strength, $ au$, mobilized along the failure surface is usually estimated based on an empirical approximation in which the cohesion, c, is assumed to be equal to the soil thickness above the supposed slip surface, d(m). This approximation is advantageous in that the result of stability analysis is not influenced by the designers in charge. However, since the methodology has little theoretical background, the cohesion may often be grossly overestimated, and conversely the angle of shear resistance, $phi$, is significantly underestimated, when the soil thickness above the supposed slip surface is quite large. In this paper, a case record of natural slope failure that took place in Hyogo Prefecture in 2007, is described in detail for the case in which the shear strength along the collapsed surface was carefully examined in a series of direct shear box (DSB) tests by considering the effects of in-situ shear stress along the slip surface. It is demonstrated that the factor of safety agrees with that of in-situ conditions when the shear strength from this kind of DSB test was employed for the back-analysis of the slope failure.
 
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Back-analysis;Initial shear stress;Laboratory test;Slope stability;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.24, no.12, 2008³â, pp.65-73
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200806942466058)
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³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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