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Çѱ¹Áö¹Ý°øÇÐȸ / v.24, no.1, 2008³â, pp.51-59
Á¡ÅäÈ¥ÇÕ¸ð·¡ÀÇ ¹Ýº¹Àü´ÜƯ¼º¿¡ ´ëÇÑ ¼¼¸³ºÐ ÇÔÀ¯À²ÀÇ ¿µÇâ
( Effect of Fines Content on the Cyclic Shear Characteristics of Sand-clay Mixtures )
±è¿í±â;È¿µµ ¸¶»çÀ¯Å°;¾ÈźÀ; ¾ß¸¶±¸Ä¡´ëÇб³ °øÇкΠ»çȸ°Ç¼³°øÇаú;¾ß¸¶±¸Ä¡´ëÇб³ °øÇкΠ»çȸ°Ç¼³°øÇаú;¿ì¼Û´ëÇб³ öµµ°Ç¼³È¯°æ°øÇаú;
 
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º» ¿¬±¸¿¡¼­´Â ¸ð·¡¿¡¼­ Á¡Åä¿¡ À̸£´Â ³ÐÀº ¹üÀ§ÀÇ È¥Çս÷Ḧ À缺ÇüÇϱâ À§ÇÏ¿© ¼¼¸³ºÐÀ¸·Î Ȱ¼ºÀ» °¡Áö°í ÀÖ´Â ÀÚ¿¬Á¡Åä¿Í Á¶¸³ºÐÀ¸·Î ±Ô»ç¸¦ È¥ÇÕÇÏ¿© ½ÇÇè¿¡ ÀÌ¿ëÇÏ¿´´Ù. °ø½Ãü´Â ¼¼¸³ºÐÇÔÀ¯À²ÀÌ ³·Àº ¹üÀ§ Áï, ¸ð·¡ÀÔÀÚ°¡ °ñ°Ý±¸Á¶¸¦ Çü¼ºÇϰí ÀÖ´Â ¹üÀ§¿¡ ´ëÇØ¼­´Â ´Ù¾çÇÑ °£±Øºñ¸¦ Á¶¼ºÇϱâ À§ÇØ ½ÀÀ± ´ÙÁü¹æ¹ýÀ» ÀÌ¿ëÇÏ¿´À¸¸ç, Ȱ¼ºÀ» ³ªÅ¸³»´Â ¹üÀ§¿¡ ´ëÇØ¼­´Â Á¤±Ô¾Ð¹ÐÁ¡ÅäÀÇ ÀÏÁ¤ÇÑ °£±Øºñ¸¦ Á¶¼ºÇϱâ À§ÇØ ¿¹¾Ð¹Ð¹æ¹ýÀ» ÀÌ¿ëÇÏ¿© ´Ù¾çÇÑ ¼¼¸³ºÐÇÔÀ¯À²À» °®´Â °ø½Ãü¸¦ Á¦ÀÛÇÏ¿© ºñ¹è¼ö ¹Ýº¹ Àü´Ü½ÇÇèÀ» ¼öÇàÇÏ¿´´Ù. ½ÇÇè°á°ú, ¼¼¸³ºÐÇÔÀ¯À² 20%¹Ì¸¸ÀÇ ½Ã·á¿¡¼­ µ¿ÀÏÇÑ ¼¼¸³ºÐÇÔÀ¯À²ÀÇ °ø½Ãü¿¡ ´ëÇØ ¸ð·¡ °ñ°Ý°£±Øºñ°¡ Áõ°¡ÇÔ¿¡ µû¶ó ¹Ýº¹ Àü´Ü°­µµ´Â °¨¼ÒÇÏ¿´À¸¸ç ´õ¿íÀÌ, ½ÇÇè½Ã·áÀÇ °ñ°Ý°£±Øºñ°¡ ±Ô»çÀÇ ÃÖ´ë°£±Øºñ ÀÌ»óÀÇ ¹üÀ§¿¡¼­´Â ÈëÀÇ ±¸Á¶°¡ ´ÙÁü¿¡³ÊÁöÀÇ ¿µÇâÀ» °ÅÀÇ ¹ÞÁö ¾Ê°í °­µµ¹ßÇöÀÇ ÁÖü°¡ Á¡Åä ¸ÅÆ®¸¯½º¿¡ Áö¹èµÇ´Â°ÍÀ» ¾Ë ¼ö ÀÖ´Ù. ¸ð·¡Á¡Åä È¥ÇÕÅ並 ´ë»óÀ¸·ÎÇÑ ºñ¹è¼ö ¹Ýº¹ Àü´Ü½ÇÇè¿¡¼­ ¼¼¸³ºÐ ÇÔÀ¯À²ÀÌ 20%¹Ì¸¸ÀÇ ³·Àº ¿µ¿ª¿¡¼­ Á¶¸³ÀÚÀÇ ±¸Á¶´Â ¹Ýº¹ Àü´Ü°­µµ Ư¼º¿¡ Å« ¿µÇâÀ» ¹ÌÄ¡¸ç ´õ¿íÀÌ, ¼¼¸³ºÐÇÔÀ¯À²º¸´Ù ¸ð·¡±¸Á¶ÀÇ ¹Ðµµ¿¡ À¯ÀÇÇϴ°ÍÀÌ ´õ¿í ÀûÇÕÇÑ °ÍÀ» ¾Ë ¼ö ÀÖ´Ù.
In this study, cyclic shear characterics of sand-clay mixtures were analyzed. In order to perform cyclic triaxial tests on sand clay mixtures, natural clays with activity and silica sand were mixed variously to reproduce soils with wide range of grain size compositions. Test specimens with various fines contents were prepared by the moisture compaction and pre-consolidation methods, while paying attention to the void ratio expressed in terms of the sand structure and clay structures, and undrained cyclic shear tests were performed. In the test results, cyclic shear strength decreased with increasing of sand granular void ratio below 20% of fine contents. When the granular void ratio of the test specimen exceeded the maximum void ratio of the silica sand, the clay matrix dominated the soil structure, and soil structures were not influenced by compaction energy. It was observed that, the matrix structure of the coarse particles has great effect on the undrained cyclic shear strength characteristics for sand-clay mixtures, and therefore, it is more appropriate to pay more attention to the density of the sand structure, rather than to the fines content.
 
Ű¿öµå
Cyclic shear strength;Fines content;Granular void ratio;Monotonic shear strength;Sand-clay mixture;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.24, no.1, 2008³â, pp.51-59
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200810737054251)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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