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Çѱ¹Áö¹Ý°øÇÐȸ / v.12, no.3, 1996³â, pp.127-148

( Bearing Capacity Analyses of Shallow Foundations in Reinforced Slopes )
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ÃÖ±Ù¿¡ µé¾î »ç¸éÀ̳ª »ç¸é ±Ùó¿¡ ±³´ëµî°ú °°ÀÌ ±âÃÊÇÏÁßÀÌ ºñ±³Àû Å« ±¸Á¶¹°µéÀÌ ½Ã°øµÇ´Â ¿¹°¡ Á¡Â÷ ¸¹¾ÆÁö´Â °æ ÇâÀ» º¸À̰í ÀÖ´Ù. ±×·¯³ª ÀϹÝÀûÀ¸·Î »ç¸é ¶Ç´Â »ç¸é ±Ùó ¿¡ ¼³Ä¡µÇ´Â ±âÃÊÀÇ °æ¿ì´Â ¼öÆòÁö¹Ý¿¡ ºñÇØ ÁöÁö·ÂÀÌ ÇöÀúÇÏ°Ô ¶³¾îÁö±â ¶§¹®¿¡, ¸»¶ÒÀ̳ª ÄÉÀ̽¼ µî°ú °°Àº °í°¡ÀÇ ±íÀº±âÃʵéÀÌ ÁÖ·Î »ç¿ëµÇ°í ÀÖ´Â ½ÇÁ¤ÀÌ´Ù. µû¶ó¼­ Åä¸ñ¼¶À¯ ¶Ç´Â metal stripµîÀÇ º¸°­À縦 ÀÌ¿ëÇÏ¿© »ç¸éÀ» º¸°­ÇÏ´Â °æÁ¦ÀûÀÎ °ø¹ýÀÌ ÇÊ¿ä½Ã µÇ°í,¶ÇÇÑ À̿Ͱ°Àº °ø¹ý¿¡ °ü·ÃµÈ ÇÕ¸®ÀûÀÎ ±âÃÊÁöÁö·Â ÇØ¼®¹ýÀÇ Á¦½Ã°¡ ¿ä±¸µÇ°í ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â »ç¸é ±Ùó¿¡ ¼³Ä¡µÇ´Â ¾èÀº ±âÃÊÀÇ ÁöÁö·Â º¸°­À» ¸ñÀûÀ¸·Î stripµîÀÇ º¸°­À縦 ¼³Ä¡ÇÒ °æ¿ì, 'wide slab effect' °³³äµî Huang¹× Binquet-LeeµîÀÌ ¸ðÇü½ÇÇèµîÀ» ÅëÇØ Á¦½ÃÇÑ ÆÄ±«¸ÅÄ«´ÏÁò ¹× BoussinesqÇØ¹ý µîÀ» Åä´ë·Î ÇÏ¿© º¸°­»ç¸é¿¡ ´ëÇÑ ±âÃÊÁöÁö·Â ÇØ¼®¹ýÀ» Á¦½ÃÇÏ¿´´Ù. º» ÇØ¼®¹ý¿¡¼­´Â soil dilatancy µîÀÇ ¿µÇâ¿¡ ÀÇÇÑ ±íÀ̺° º¸°­Àç-ÁÖº¯Èë »çÀÌÀÇ ¸¶Âû°è¼ö º¯È­¸¦ ÇÔ¼öÇüÅ·ΠǥÇöÇÏ¿© º¸°­ÀçÁÖº¯Èë »çÀÌÀÇ »óÈ£ÀÛ¿ëÀ» ºÎºÐÀûÀ¸·Î °í·ÁÇÏ¿´À¸¸ç, ¾Æ¿ï·¯ º» ¿¬±¸¸¦ ÅëÇØ Á¦½ÃµÈ ±âÃÊÁöÁö·Â ÇØ¼®¹ýÀÇ ÀûÇÕ¼º °ËÅ並 À§ÇØ HuangµîÀÌ Á¦½ÃÇÑ ¸ðÇü½ÇÇè°á°ú¿Í ¼­·Î ºñ±³ÇÏ¿´´Ù. À̿ܿ¡µµ, ¼³°è¿¡ °ü·ÃµÈ ¿©·¯ º¯¼öµéÀÌ ±âÃÊÁöÁö·Â¿¡ ¹ÌÄ¡´Â ¿µÇâ¿¡ ´ëÇØ¼­µµ ºÐ¼®ÀÌ ÀÌ·ç¾îÁ³´Ù.
Recently, foundations of heavy structures such as bridge abutments have been built on slopes or near the crest of slopes at an increasing rate. Because the bearing capacity of such foundations is considerably lower than the bearing capacity of the same soil on a level ground, deep footings such as piles and caissons are often used. However, the costs of such methods are generally very high. One of the new techniques to overcome the problem is to place reinforcing members such as geosynthetics or metal strips horizontally at some depths beneath the footings. Rational methods of analysis to predict the bearing capacity of footings in reinforced slopes are therefore needed. This paper proposes an analytical method for estimating the increase in bearing capacity gained from the included horizontal strips or ties of tensile reinforcing in the foundation soil below the footing built near the crest of a slope. A failure mechanism, including the concept of'wide slab effect', adopted in the present study for analyzing the bearing capacity of foundations in reinforced slopes, is established through the observed model test behaviors described by Binquet SE Lee and Huang et al, and the Boussinesq solutions. The analytical results are then compared with the experimental data described in the paper by Huang et al. Also in order to properly evaluate the soil reinforcement interaction, typical pullout test values of the apparent friction coefficient, which usually vary with depths owing to both the increase of the shearing volume and the increase in local stress caused by soil dilatancy, are analyzed and related functionally. Furthermore, analytical parametric studies are carried out to investigate the effect and significance of various pertinent parameters associated with design of reinforced slope foundations. Keywords : Bearing capacity, Reinforced slope, Slab effect, Friction coefficient.
 
Ű¿öµå
Bearing capacity;Reinforced slope;Slab effect;Friction coefficient;
 
Çѱ¹Áö¹Ý°øÇÐȸÁö:Áö¹Ý / v.12, no.3, 1996³â, pp.127-148
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-215X
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199611920446595)
¾ð¾î : Çѱ¹¾î
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