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Çѱ¹Áö¹Ý°øÇÐȸ / v.13, no.2, 1997³â, pp.155-168
°ÝÀÚÁöº¸¿Í ¼ôÅ©¸®Æ® º¹ÇÕ±¸Á¶Ã¼ÀÇ Æ¯¼º ½ÇÇè ¿¬±¸
( An Experimental Study on the Characteristics of a Composite Structure of Lattice Girder and Shotcrete )
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°ÝÀÚÁöº¸´Â NATM¿¡¼­ Åͳα¼Âø ÈÄ °ð¹Ù·Î ¼³Ä¡µÇ´Â °­Áöº¸ÀçÀÇ ÇÑ Á¾·ù·Î¼­ ±âÁ¸ÀÇ HÇü°­ Áöº¸À縦 ´ëüÇϰíÀÚ À¯·´¿¡¼­ °³¹ßµÈ »õ·Î¿î Á¾·ùÀÇ Áöº¸ÀçÀÌ´Ù. °ÝÀÚÁöº¸´Â °­ºÀÀ» »ï°¢ÇüÅ·Π¿«¾î ¸¸µé¾ú±â ¶§¹®¿¡ ¼ôÅ©¸®Æ® Ÿ¼³ÀÌ ¿ëÀÌÇϰí Áöº¸Àç ¹è¸é¿¡ »ý±â´Â °øµ¿À» ÃÖ¼ÒÈ­ ÇÒ ¼ö ÀÖ´Â ÀåÁ¡ÀÌ ÀÖ´Ù. ¶ÇÇÑ °ÝÀÚÁöº¸¿Í ¼ôÅ©¸®Æ® º¹ÇÕ±¸Á¶Ã¼´Â °áÇÕ·ÂÀÌ ¿ì¼öÇÏ¿© ÀÏüȭµÈ ±¸Á¶Ã¼·Î¼­ °Åµ¿Çϱ⠶§¹®¿¡ Áö¾ÐÀ» È¿°úÀûÀ¸·Î ÁöÁöÇÒ ¼ö ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â °ÝÀÚÁöº¸¿Í ¼ôÅ©¸®Æ® º¹ÇÕ±¸Á¶Ã¼ÀÇ Æ¯¼ºÆÄ¾ÇÀ» À§ÇØ ½Ç½ÃÇÑ ¸ðÇüº®Ã¼ ½ÃÇè, ¸ðÇüº®Ã¼¿¡ Ÿ¼³µÈ ¼ôÅ©¸®Æ®ÀÇ °­µµÆ¯¼º½ÃÇè, °ÝÀÚÁöº¸¿Í ¼ôÅ©¸®Æ®ÀÇ ºÎÂø°­µµ½ÃÇè °á°ú¸¦ Á¦½ÃÇÏ¿´´Ù. ½ÇÇè°á°ú ¼ôÅ©¸®Æ®°¡ Ÿ¼³µÈ °ÝÀÚÁöº¸´Â ¼ôÅ©¸®Æ®°¡ Ÿ¼³µÈ HÇü°­ Áöº¸Àç¿¡ ºñÇØ ¼ôÅ©¸® Æ® ¸®¹Ù¿îµå, Ÿ¼³µÈ ¼ôÅ©¸®Æ®ÀÇ °­µµ, ºÎÂøÆ¯¼º µîÀÌ ¿ì¼öÇÑ °ÍÀ¸·Î ÆÇ¸íµÇ¾ú°í, ÀÌ·Î½á °ÝÀÚÁö·Î´Â ÀûÀýÇÑ ÅͳÎÁöº¸Àç·Î¼­ÀÇ ¿ªÇÒÀ» ÇÒ °ÍÀ¸·Î ÆÇ´ÜµÇ¾ú´Ù.
Lattice girder is a new steel support developed in Europe for the replacement of an existing H-shaped steel set, which is installed after tunnel excavation. Lattice girder has the following several advantages : 1. Lattice girder minimizes the amount of shotcrete shadow which happens to occur behind a steel support. 2. A triangular shape of lattice girder makes shotcrete placed efficiently. 3. Lattice girder provides a good bond strength for shotcrete, which makes the composite structure of lattice girder and shotcrete behave monolithic, and therefore, the rock load can be supported effectively by the lattice girder system, This paper presents the results from a model wall test, a strength test for shotcrete shot on the model wall and a strength test for the bond between lattice girder and shotcrete. These tests proved that lattice-girder system is superior to H-shaped steel-set system concerning the shotcrete rebound rate, the developed shotcrete strength and the adhesion characteristics.
 
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NATM;Lattice girder;H-shaped steel set;Model wall test;Rebound rate;Bond strength;Pull down test;
 
Çѱ¹Áö¹Ý°øÇÐȸÁö:Áö¹Ý / v.13, no.2, 1997³â, pp.155-168
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-215X
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199711920447331)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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