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Çѱ¹Áö¹Ý°øÇÐȸ / v.17, no.6, 2001³â, pp.149-162
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¼öÀ§º¯µ¿¿¡ µû¸¥ Earth-Rockfill ´ïÀÇ °Åµ¿ ¹× ±Õ¿¿øÀο¡ ´ëÇÑ Æò°¡
( An Evaluation of Stress-Strain Behaviour of Earth-Rockfill Dam and Causes of Crack due to Water Table Fluctuation ) |
| ±è»ó±Ô;ÇѼº±æ;À̹ÎÇü;¾È»ó·Î; ÀϺ» Saga´ëÇÐ;Çö´ë»ê¾÷°³¹ß Åä¸ñ¼³°èÆÀ;ÁöÇÑ¿£Áö´Ï¾î¸µ Áö¹Ý»ç¾÷ºÎ;½Ã¼³¾ÈÀü±â¼ú°ø´Ü ´ïÇ׸¸½Ç;
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| »ï¶ûÁø¿¡ À§Ä¡ÇÑ »ï¶ûÁø¾ç¼ö¹ßÀü »ó.ÇϺδïÀÇ ´ï¸¶·ç¿¡ ½Ã°ø ÈÄ Á¾¹æÇâ ±Õ¿ÀÌ ¹ß»ýÇÏ¿´´Ù. ÀÌ ´ïµéÀº Àü·ÂÀ» »ý»êÇϱâ À§ÇÑ ¾ç¼ö¹ßÀü´ïÀ¸·Î »óºÎ´ï°ú ÇϺδïÀ¸·Î ±¸¼ºµÇ¾î ÀÖÀ¸¸ç, ¸ÅÀÏ 10mÀÌ»óÀÇ ¼öÀ§º¯È¸¦ ¹Þ¾Æ¿Ô´Ù. º» ³í¹®Àº ÀÌµé ´ïÁß »óºÎ´ï¿¡ ¹ß»ýÇÑ Á¾¹æÇâ ±Õ¿ÀÇ ¿øÀÎÀ» ã´Âµ¥ ÀÖ´Ù. ±Õ¿ÀÇ ÁÖ¿ä ¿øÀÎÀº ¼öÀ§º¯µ¿À¸·Î ÀÎÇÑ °ÍÀ¸·Î ÆÇ´ÜµÇ¾úÀ¸¸ç, À̸¦ °ËÅäÇϱâ À§ÇØ hyperbolic modelÀ» ÀÌ¿ëÇÑ ¼öÄ¡ÇØ¼®À» ¼öÇàÇÏ¿´´Ù. ¼öÄ¡ÇØ¼®À» À§ÇÑ ÀÔ·ÂÀڷḦ ¾ò±â À§ÇØ ½Éº®Àç·á¿Í »ç¼®Àç·á¿¡ ´ëÇØ ÀÏ·ÃÀÇ »ïÃà¾ÐÃà½ÃÇèÀ» ¼öÇàÇÏ¿´´Ù. ¶ÇÇÑ ¼öÀ§º¯µ¿À¸·Î ÀÎÇÑ ÁÖ±âÀûÀÎ ÀÀ·Âº¯È¸¦ °ËÅäÇϱâ À§ÇÑ ÀÔ·ÂÀڷḦ ¾ò±â À§ÇØ Áøµ¿»ïÃà¾ÐÃà½ÃÇèÀ» ¼öÇàÇÏ¿´´Ù. ¼öÄ¡ÇØ¼®°á°ú ¹Ýº¹ÇÏÁßÀÌ ÀÛ¿ëÇßÀ» °æ¿ì ´ï¸¶·ç¿¡¼ ±íÀÌ 4m±îÁö ±¸¼Ó¾Ð·ÂÀÌ À½ÀÌ µÇ´Â °ÍÀ¸·Î ³ªÅ¸³µÀ¸¸ç, ÀÌ·Î ÀÎÇØ Á¾¹æÇâ±Õ¿ÀÌ ¹ß»ýÇÑ °ÍÀ¸·Î ÆÇ´ÜµÇ¾ú´Ù. ÀÌ Á¾¹æÇâ±Õ¿ÀÇ ±íÀÌ´Â ´ï ¸¶·ç¿¡¼ ¼öÇàÇÑ ½ÃÇè±¼¿¡¼ È®ÀÎÇÏ¿´À¸¸ç, ÇöÀå Á¶»ç°á°ú¿Í Àß ºÎÇÕÇÏ¿´´Ù. |
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| Longitudinal cracks have occurred on the crest of dams soon after their construction of two earth-rocfill dams located in Samlangjin. They are a pair of pumped storage dams constructed for generation of electrical power. The upper dam and lower dam are subjected to the variation of water level more than 10m once in a day alteratively. This paper deals with the finding of possible causes for longitudinal cracks about upper dam. The dominant cause was considered to be due to fluctuation of water load, for which numerical analysis was carried out using the hyperbolic model. In order to obtain parameters necessary to the analysis, a series of triaxial tests was performed for both core and rock material. Also dynamic triaxial test was performed to obtain dynamic properties of soils, which could be used as input data to simulate frequent variation of stress change due to the water fluctuation. It was known from the numerical analysis that the confining pressure of upper 4m from the top of the crest become negative after repeating of water load, meaning that tension cracks occurred in the top portion of the crest. The depth of longitudinal cracks has been investigated by digging test pit on the crest. This results agree with the field observation. |
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| Ű¿öµå |
| Dynamic triaxial tests;Earth-rockfill dams;Hyperbolic model;Longitudinal cracks;Water table fluctuation; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.17, no.6, 2001³â, pp.149-162
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200111920879593)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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