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Çѱ¹Áö¹Ý°øÇÐȸ / v.15, no.1, 1999³â, pp.99-112
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( Development of an Artificial Neural Expert System for Rational Determination of Lateral Earth Pressure Coefficient ) |
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| ±¹³»¿¡¼ °èÃøµÈ 92°³ÀÇ Ãø¾Ð°è¼ö¸¦ ÀÌ¿ëÇÏ¿© ½Éµµ¿¡ µû¸¥ Ãø¾Ð°è¼öÀÇ °æÇâÀ» ºÐ¼®Çϰí Hoek & BrownÀÌ Á¤ÀÇÇÑ Ãø¾Ð°è¼öÀÇ ¹üÀ§¿Í ºñ±³ÇÏ¿´´Ù. ±¹³»ÀÇ Ãø¾Ð°è¼ö´Â 1ÀÌ»óÀÌ 84%·Î ´ëºÎºÐÀÇ °æ¿ì ¼öÆòÀÀ·ÂÀÌ ¿¬Á÷ÀÀ·Âº¸´Ù Å©°Ô ³ªÅ¸³µ´Ù. Áö¹ÝÀÇ Ä§½Ä. ÅðÀû ¹× ¾Ï¹Ý dzÈ. Ⱦ¾Ð·Â¿¡ ÀÇÇÑ Ãø¾Ð°è¼öÀÇ º¯È¸¦ ºÐ¼®Çϱâ À§ÇØ Åº¼Ò¼º ÀÌ·ÐÀ» Àû¿ëÇÏ°í ±× °á°ú¸¦ À¯ÇÑ¿ä¼ÒÇØ¼®°ú ºñ±³ÇÏ¿´´Ù. Ãø¾Ð°è¼ö´Â ÁöÇ¥ ħ½Ä°ú Ⱦ¾Ð·ÂÀÌ Å©°í ¾ÏÁúÀÌ ¾çÈ£ÇÒ¼ö·Ï Áõ°¡ÇÏ¿´°í ÅðÀûÀÇ °æ¿ì¿¡ °¨¼ÒÇÏ¿´´Ù. º» ¿¬±¸¸¦ ÅëÇÏ¿© ¿©·¯ ÁöÁúÀÛ¿ëÀÌ Ãø¾Ð°è¼ö¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ÆÄ¾ÇÇÒ ¼ö ÀÖ¾ú°í, ƯÈ÷ ÁöÇϰøµ¿ÀÇ ±¼Âø ½ÉµµÀΠõºÎ ¾Ï¹Ý¿¡¼ÀÇ Ãø¾Ð°è¼ö º¯È¸¦ ÆÄ¾ÇÇÒ ¼ö ÀÖ¾ú´Ù. ´ÙÃþ ¿ªÀüÆÄ ÇнÀ ¾Ë°í¸®ÁòÀ» Àû¿ëÇÑ Àΰø½Å°æ¸ÁÀ» ÀÌ¿ëÇÏ¿© Ãø¾Ð°è¼ö ¿¹Ãø Àü¹®°¡ ½Ã½ºÅÛÀ» °³¹ßÇÏ¿´´Ù. ÇнÀ·ü, ¸ð¸àÅÒ »ó¼ö ±×¸®°í Àº´ÐÃþ ³ëµå¼ö¸¦ °í·ÁÇÏ¿© ½ÇÃøÄ¡¿Í »ó°ü°è¼ö 0.996 ÀÌ»óÀÇ ¸Å¿ì ³ôÀº Ãß·ÐÀ²À» º¸ÀÌ´Â ¸ðµ¨À» ¼±Á¤ÇÏ¿´´Ù ÇнÀ¿¡¼ Á¦¿ÜÇÑ 9°³ °èÃøÀÚ·á·Î ÀÌ ¸ðµ¨À» °ËÁõÇÑ °á°ú, Ã߷пÀÂ÷ÀÇ Æò±ÕÀº 20%¿´À¸¸ç »ó°ü°è¼öµµ 0.95 ÀÌ»óÀ¸·Î Ãø¾Ð°è¼ö¸¦ ¿¹ÃøÇϴµ¥ ÀÖ¾î ³ôÀº ½Å·Ú¼ºÀ» º¸¿´´Ù. |
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| By using 92 values of lateral earth pressure coefficient(K) measured in Korea, the tendency of K with varying depth is analyzed and compared with the range of K defined by Hoek and Brown. The horizontal stress is generally larger than the vertical stress in Korea : About 84 % of K values are above 1. In this study, the theory of elasto-plasticity is applied to analyze the variation of K values, and the results are compared with those of numerical analysis. This reveals that the erosion, sedimentation and weathering of earth crust are important factors in the determination of K values. Surface erosion, large lateral pressure and good rock mass increase the K values, but sedimentation decreases the K values. This study enable us to analyze the effects of geological processes on the K values, especially at shallow depth where underground excavation takes place. A neural network expert system using multi-layer back-propagation algorithm is developed to predict the K values. The neural network model has a correlation coefficient above 0.996 when it is compared with measured data. The comparison with 9 measured data which are not included in the back-propagation learning has shown an average inference error of 20% and the correlation coefficient above 0.95. The expert system developed in this study can be used for reliable determination of K values. |
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| Ű¿öµå |
| Lateral earth pressure coefficient;Elasto-plasticity theory;Numerical analysis;Geological process;Neural network expert system;Correlation coefficient; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.15, no.1, 1999³â, pp.99-112
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199911921748929)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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