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Çѱ¹Áö¹Ý°øÇÐȸ / v.21, no.1, 2005³â, pp.5-14
°­³Î¸»¶Ò È븷À̺®À¸·Î ½Ã°øµÈ ±¼Âø¿¬¾àÁö¹ÝÀÇ ¾ÈÁ¤¼º
( The Stability of Excavated Soft Ground Supported by Sheet-pile Walls )
È«¿øÇ¥;±èµ¿¿í;¼Û¿µ¼®; Áß¾Ó´ëÇб³ °ø°ú´ëÇÐ °Ç¼³È¯°æ°øÇаú;Áß¾Ó´ëÇб³ ´ëÇпø Åä¸ñ°øÇаú;Çѱ¹ÁöÁúÀÚ¿ø¿¬±¸¿ø ÁöÁúȯ°æÀçÇØ¿¬±¸ºÎ;
 
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ÀÎõ±¹Á¦°øÇ× °ø»çÇöÀåÀÇ È븷ÀÌ ±¼Âø´Ü¸é¿¡¼­ °èÃøµÈ ÀڷḦ °ËÅäÇÏ¿© ¿¬¾àÁö¹Ý¿¡ ¼³Ä¡µÈ °­³Î¸»¶Ò È븷À̺®ÀÇ ¼öÆòº¯À§¿Í ±¼ÂøÁÖº¯Áö¹ÝÀÇ º¯Çü¿¡ ´ëÇÑ »ó°ü°ü°è¸¦ Á¶»çÇÏ¿´´Ù. º®Ã¼ÀÇ ÁöÁö¹æ½Ä¿¡ µû¸¥ °­³Î¸»¶Ò È븷À̺®ÀÇ ¼öÆòº¯À§´Â ¾ÞÄ¿ÁöÁö, º¹ÇÕÁöÁö, ¹öÆÀº¸ÁöÁö ¼øÀ¸·Î ÀÛ°Ô ³ªÅ¸³µÀ¸¸ç, °¢°¢ÀÇ ÁöÁö¹æ½Ä¿¡ µû¸¥ ÃÖ´ë¼öÆòº¯À§ ¹ß»ýÀ§Ä¡µµ ¼­·Î ´Ù¸£°Ô ¹ß»ýÇÏ¿´´Ù. È븷À̺®ÀÇ ÃÖ´ë¼öÆòº¯À§ ¹× ÃÖ´ë¼öÆòº¯À§¼Óµµ´Â ±¼ÂøÁö¹ÝÀÇ ¾ÈÁ¤¼ö°¡ ${pi}$ÀÌÇÏÀÏ °æ¿ì °¢°¢ ±¼Âø±íÀÌÀÇ $1%$, 1mm/dayÀÌÇÏ·Î ¹ß»ýµÇ°í, ¾ÈÁ¤¼ö°¡ ${pi}+2$ ÀÌÇÏÀÏ °æ¿ì °¢°¢ ±¼Âø±íÀÌÀÇ $2.5%$, 2mm/dayÀÌÇÏ·Î ¹ß»ýµÇ¸ç, ¾ÈÁ¤¼ö°¡ ${pi}+2$ ÀÌ»óÀÏ °æ¿ì ±Þ°ÝÇÏ°Ô Áõ°¡ÇÑ´Ù. ¶ÇÇÑ, ±¼ÂøÀú¸é¿¡¼­ÀÇ NÄ¡°¡ °¨¼ÒÇÔ¿¡ µû¶ó È븷À̺®ÀÇ ÃÖ´ë¼öÆò º¯À§´Â Áõ°¡Çϸç, NÄ¡°¡ ¾à 10ÀÌÇÏÀÏ °æ¿ì È븷À̺®ÀÇ ÃÖ´ë¼öÆòº¯À§´Â ±Þ°ÝÇÏ°Ô Áõ°¡ÇÔÀ» ¾Ë ¼ö ÀÖ´Ù. ÇÑÆí, Terzaghi(1943)¿¡ ÀÇÇØ Á¦¾ÈµÈ È÷ºù¿¡ ´ëÇÑ ¾ÈÀüÀ²ÀÌ °¨¼ÒÇÔ¿¡ µû¶ó È븷À̺®ÀÇ ÃÖ´ë¼öÆòº¯À§´Â Áõ°¡Çϸç, È÷ºùÀÇ ¾ÈÀüÀ²ÀÌ 2.0ÀÏ °æ¿ì È븷À̺®ÀÇ ÃÖ´ë¼öÆòº¯À§´Â ±Þ¼ÓÇÏ°Ô Áõ°¡ÇÔÀ» ¾Ë ¼ö ÀÖ´Ù. µû¶ó¼­, ±¹³» ¿¬¾àÁö¹Ý °­³Î¸»¶Ò È븷À̺®ÀÇ °æ¿ì È÷ºù¿¡ ´ëÇÑ ¾ÈÀüÀ²Àº 2.0À¸·Î Á¦¾ÈÇÒ ¼ö ÀÖ´Ù.
Based on the field measuring data obtained from excavation sections in Inchon International Airport project, the relationships between the horizontal displacement of sheet-pile walls and the deformations of soft ground around the excavation were investigated. The horizontal displacements of walls according to supporting method occur, and the displacements were found to become larger in the order of anchors, anchors with struts, and struts. The depths of maximum horizontal displacement are varied with supporting systems. If the stability number shows lower than ${pi}$, the maximum horizontal displacement and the velocity of maximum horizontal displacement are respectively developed less than $1%$ of excavation depth and 1mm/day. When the stability number shows lower than ${pi}+2$, the maximum horizontal displacement and the velocity are respectively developed less than $2.5%$ of excavation depth and 2mm/day. Also, when the stability number shows more than ${pi}+2$, the maximum horizontal displacement and the velocity rapidly increase. Also, the maximum horizontal displacement is found to increase rapidly when N value is less than 10. The maximum horizontal displacement increases with decreasing the factor of safety against basal heave (Terzaghi, 1943), and the maximum horizontal displacement is found to increase rapidly when the factor of safety against basal heave is greater than 2.0. This value can be proposed as the criterion for the factor of safety against basal heave in Korea.
 
Ű¿öµå
Heave;Horizontal displacement;Sheet-pile walls;Soft ground;Stability number;Supporting system;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.21, no.1, 2005³â, pp.5-14
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200531935916418)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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