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Çѱ¹Áö¹Ý°øÇÐȸ / v.19, no.1, 2003³â, pp.229-236
µ¿°áÅäÀÇ µ¿Àû Ư¼º¿¡ °üÇÑ ¿¬±¸
( An Experimental Study on the Dynamic Characteristics of Frozen Soil )
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º» ¿¬±¸¿¡¼­´Â ¿ì¶õ¹ÙÅç(Ulanbator)¿¡¼­ ºÏ°æ(Beijing)»çÀÌÀÇ Áö¿ª¿¡¼­ »ùÇøµÇÑ µ¿°áµÈ ÀÀȸ¾Ï dzȭÅäÀÇ µ¿Àû Ư¼ºÀ» ±Ô¸íÇϱâ À§ÇØ Ç³È­Åä¿Í, ±Û·¡½ººñµå(glass bead)¸¦ ´ë»óÀ¸·Î ¿Âµµº¯È­¿¡ µû¸¥ ÃÊÀ½ÆÄ ¼Óµµ¸¦ sing-around ¹ýÀ» »ç¿ëÇÏ¿© ÃøÁ¤ÇÏ¿´´Ù. º» ½ÇÇèÀ» ÅëÇØ ÃÊÀ½ÆÄ ¼Óµµ´Â ¿Âµµ°¡ Áõ°¡ÇÔ¿¡ µû¶ó °¨¼ÒÇÏ¿´°í ÃÊÀ½ÆÄ ¼Óµµ¿Í ºÎµ¿¼öºÐ »çÀÌ¿¡´Â ¼±ÇüÀûÀÎ °ü°è°¡ Á¸ÀçÇÔÀ» È®ÀÎÇÏ¿´´Ù. ¶ÇÇÑ µ¿°áÅäÀÇ ÃÊÀ½ÆÄ ½ÇÇè°á°ú, Á¾ÆÄ°¡ ½Ã·áÀÇ Á¾·ù¿¡ Å©°Ô ¿µÇâÀ» ¹ÞÁö ¾Ê±â ¶§¹®¿¡ ºÎµ¿¼öºÐ°ú ÃÊÀ½ÆÄ ¼Óµµ¿ÍÀÇ °ü°è±Ô¸í¿¡ ÀûÇÕÇÏ´Ù°í ÆÇ´ÜµÈ´Ù.
Ultrasonic propagation velocities of both the dilatational and shear waves through the weathered tuff soil sampled from the area tying between Ulanbator and Beijing were measured under temperature condition of near subzero by means of sing-around method. After comparing the results with obtained data on unfrozen water content, a linear relation between velocities and unfrozen water content was performed with high coefficient value. Experimental results of two kinds of rather uniform materials, namely, glass-beads and silica micro-beads, testified the similar linear relations. In addition, the change rate of dilatational wave velocities with the change of volumetric unfrozen water content was not dependent on soil type. Although a rational theory of the ultrasonic velocities dependence on the unfrozen water content is not yet proposed, the presented empirical relationships may suggest the appropriate evaluation to the effect of unfrozen water on dynamic characteristics of frozen soil.
 
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Dilatational wave;Frozen soil;Shear wave;Unfrozen water;Weathered tuff soil;
 
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.19, no.1, 2003³â, pp.229-236
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200311921582312)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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