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Çѱ¹Áö¹Ý°øÇÐȸ / v.15, no.6, 1999³â, pp.155-165
dzȭ¾Ï¿¡ ±ÙÀÔµÈ ÇöÀ埼³¸»¶ÒÀÇ ÁöÁö°Åµ¿ ºÐ¼®
( Bearing Capacity of Cast-in-situ Concrete Piles Socketed in Completely Weathered Gneiss )
Àü°æ¼ö;±èÁ¤È¯;±è¸í¸ð; Çѱ¹µµ·Î°ø»ç µµ·Î¿¬±¸¼Ò;»ï¼º°Ç¼³ ±â¼ú¿¬±¸¼Ò;¼­¿ï´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;
 
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È­°­Æí¸¶¾ÏÀ¸·Î µÈ dzȭ¾ÏÀÌ ±â¹Ý¾ÏÀÎ ¾Ï¹Ý¿¡ ¼ÒÄÏµÈ ¸»¶ÒÀÇ ÁöÁö °Åµ¿À» ¾Ë±â À§ÇÏ¿© Á÷°æ 40cmÀÎ ÇöÀ埼³¸»¶Ò 8°³¸¦ ½Ã°øÇÏ°í ¸»¶Ò ÀçÇÏ ½ÃÇèÀ» ½Ç½ÃÇÏ¿´´Ù. Áö¹Ý Á¶»ç´Â ¿¹ºñÁ¶»ç, º»Á¶»ç, ±×¸®°í ½ÃÇèÈÄ Á¶»ç µî 3Â÷·Ê¿¡ °ÉÃļ­ ÀÌ·ç¾î Á³À¸¸ç, ÀÌ ¶§ BX¿Í NX º¸¸µ(12°³¼Ò) Á¶»ç¿Í ź¼ºÆÄ Ž»ç µîÀÌ ½ÃÇàµÇ¾ú´Ù. ¾Ï¹Ý ¼ÒÄÏ ¸»¶ÒÀÇ ÁöÁö °Åµ¿À» ÁÖ¸éºÎ¿Í ¼±´ÜºÎ·Î ºÐ¸®ÇÏ¿© Æò°¡Çϱâ À§ÇÏ¿© ¾Ï¹Ý ¼ÒÄÏ ±íÀ̸¦ 3m, 6m ±×¸®°í 9mµîÀ¸·Î ´Ù¾çÇÏ°Ô Çϰí, ¼±´ÜºÎ ÁöÁö·ÂÀÇ ¿µÇâÀ» ¹èÁ¦Çϱâ À§ÇÏ¿© ¸»¶Ò ¼±´ÜºÎ¿¡ ½ºÅ¸ÀÌ·ÎÆû(styrofoam)À» ¸Å¼³Çϱ⵵ ÇÏ¿´´Ù. ±×¸®°í ¸»¶Ò ±íÀÌ¿¡ µû¸¥ ÇÏÁß ÀüÀÌ ÇØ¼®À» À§ÇÏ¿© ¸»¶Ò ö±Ù¿¡ º¯Çü·ü °ÔÀÌÁö µîÀ» ¼³Ä¡Çϰí ÀçÇÏ ½ÃÇèÀ» ¼öÇàÇÏ¿´´Ù. »ó±âÀÇ ÀçÇÏ ½ÃÇè °á°ú·ÎºÎÅÍ ±¹³» È­°­ Æí¸¶¾ÏÀ¸·Î µÈ dzȭ¾Ï¿¡ ¼ÒÄÏµÈ ÇöÀ埼³¸»¶ÒÀÇ Çã¿ë ÁÖ¸éÁöÁö·Â°ú Çã¿ë ¼±´ÜÁöÁö·ÂÀ» °¢°¢ $8.6t/m^2 ;¿Í ;84t/m^2$·Î Á¦¾ÈÇÏ¿´À¸¸ç, ÀÏÃà¾ÐÃà°­µµ¸¦ ÀÌ¿ëÇÑ Ç³È­¾ÏÀÇ Åº¼º°è¼ö »êÁ¤½ÄÀ» Á¦¾ÈÇÏ¿´´Ù.
In completely weathered granite gneiss,8 of 40cm cast-in-situ concrete piles are constructed, and static pile load tests are executed on the piles to study the bearing behavior of rock-socketed piles. Subsurface explorations are carried out on the test site in three phases, in which 14 borehole investigations as well as the seismic investigation are performed. Rock socketd depths of the piles in the weathered rocks are varied as 3m, 6m and 9m to separate the shaft resistance from the end bearing resistance, and for a couple of piles, styrofoam of 10cm thickness is installed under the pile point to eliminate the effect of the end resistance. Strain gages are instrumented on re-bars to pick-up the transferred loads along the pile length. From the results of the pile load tests, the allowable shaft resistance and the allowable end bearing values of weathered rocks are proposed as $8.6t/m^2;and; 84t/m^2$, respectively. The empirical equation relating the elastic modulus of rock mass with the uniaxial compressive strength of the rock specimen is also proposed for the weathered rocks.
 
Ű¿öµå
Pile load test;Completely weathered gneiss;Shaft resistance;End bearing;Load transfer;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.15, no.6, 1999³â, pp.155-165
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199911921749840)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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