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Çѱ¹Áö¹Ý°øÇÐȸ / v.22, no.6, 2006³â, pp.27-40
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µÇ¸Þ¿òÅäÀÇ Ä§ÇÏ¿¡ µû¸¥ °³Âø½Ä ÅͳΠ¶óÀ̴׿¡ ÀÛ¿ëÇÏ´Â Åä¾ÐÀÇ º¯È
( Variation of Earth Pressure Acting on Cut-and-Cover Tunnel Lining with Settlement of Backfill ) |
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| °³Âø½Ä ÅͳζóÀÌ´×ÀÇ ÆÄ±« ¿øÀÎÀº ¹°¸®Àû ¿äÀΰú °øÇÐÀû ¿äÀÎÀ¸·Î ³ª´ ¼ö ÀÖ´Ù. ¹°¸®Àû ¿äÀÎÀ¸·Î¼´Â Àç·áƯ¼º, º¸°Àç ºÎ½Ä µîÀÌ ÀÖÀ¸¸ç, °øÇÐÀû ¿äÀÎÀº ¼ö¾Ð°ú ±³ÅëÁøµ¿ µîÀÌ ÀÖ´Ù. º» ¿¬±¸¿¡¼´Â °øÇÐÀû ¿äÀÎ Áß ºÎ°¡ÇÏÁß Áï, °ø»ç¸¦ ¿Ï·áÇÑ µÚ¿¡ ¶óÀÌ´×ÀÇ º¯Çü ¹× ÆÄ±«¸¦ À¯¹ßÇÏ´Â Áõ°¡ Åä¾Ð¿¡ ÃÊÁ¡ÀÌ ¸ÂÃß¾îÁ® ÀÖ´Ù. Áõ°¡ Åä¾ÐÀº µÇ¸Þ¿òÅäÀÇ ´ÙÁü ºÒ·®, ÀÚÁß ¹× °¿ì¿¡ ÀÇÇÑ Ä§ÇÏ, ±³ÅëÇÏÁß¿¡ ÀÇÇÑ Áøµ¿ µîÀÌ ¿øÀÎÀÌ µÇ¾î ¹ß»ýÇÑ´Ù. º» ¿¬±¸´Â ¸ð·¡ Áö¹Ý¿¡ $1.0D{sim}1.50D$ ±íÀÌ¿¡ °³Âø½ÄÀ¸·Î ½Ã°øÇÏ´Â ¿øÇüÀÇ °¼º Åͳο¡ ÀÛ¿ëÇÏ´Â Åä¾Ð¿¡ °üÇÑ °ÍÀ¸·Î Áøµ¿´ÙÁüÀÇ ¿µÇâÀ» ¸ðÇü ½ÇÇè¿¡¼ ÃæºÐÈ÷ ¹Ý¿µÇϱâ À§ÇÏ¿© 100HzÀÇ Áøµ¿Á֯ļö¸¦ »ç¿ëÇÏ¿´´Ù. º» ¿¬±¸¿¡¼´Â °³Âø½Ä ÅͳΠ¶óÀ̴׿¡ ÀÛ¿ëÇÏ´Â Åä¾Ð°ú ÁÖº¯ Áö¹ÝÀÇ º¯Çü ¾ç»óÀ» ÆÄ¾ÇÇÏ°í ±âÁ¸ Åä¾Ð °è»ê°ø½ÄÀ» °ËÅäÇϱâ À§ÇØ ½Ç³» ÅͳθðÇü½ÇÇèÀ» ½Ç½ÃÇÏ¿´À¸¸ç, °³Âø½Ä ÅͳΠ¶óÀ̴׿¡ ÀÛ¿ëÇÏ´Â ÃøÁ¤ Åä¾Ð°ú Åä¾Ð°ø½Ä¿¡ ÀÇÇØ »êÃâÇÑ Åä¾ÐÀ» ºñ±³ ºÐ¼®ÇÏ¿© ±âÁ¸ °ø½Ä¿¡ ´ëÇÑ ¾ÈÀüÀ²À» Á¦½ÃÇÏ¿´´Ù. |
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| Damage of cut-and-cover tunnel lining can be attributed to physical and mechanical factors. Physical factors include material property, reinforcement corrosion, etc. while mechanical factors include underground water pressure, vehicle loads, etc. This study is limited to the modeling of rigid circular cut and cover tunnel constructed at a depth of $1.0{sim}1.5D$ in loose sandy ground and subjected to a vibration frequency of 100 Hz. In this study, only damages due to mechanical factors in the form of additional loads were considered. Among the different types of additional, excessive earth pressure acting on the cut-and-cover tunnel lining is considered as one of the major factors that induce deformation and damage of tunnels after the construction is completed. Excessive earth pressure may be attributed to insufficient compaction, consolidation due to self-weight of backfill soil, precipitation and vibration caused by traffic. Laboratory tunnel model tests were performed in order to determine the earth pressure acting on the tunnel lining and to investigate the applicability of existing earth pressure formulas. Based on the difference in the monitored and computed earth pressure, a factor of safety was recommended. Soil deformation mechanism around the tunnel was also presented using the picture analysis method. |
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| Ű¿öµå |
| Cut and cover tunnel;Earth pressure;Tunnel lining;Tunnel model test; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.22, no.6, 2006³â, pp.27-40
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200633242257264)
¾ð¾î : ¿µ¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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