|
|
|
Çѱ¹Áö¹Ý°øÇÐȸ / v.26, no.3, 2010³â, pp.13-23
|
Åä¸ñ¼¶À¯¿Í ¸ð·¡·Î ó¸®µÈ ÃÊ¿¬¾àÁö¹ÝÀÇ ÀåºñÁÖÇ༺¿¡ ´ëÇÑ ¿ø½É¸ðÇü½ÇÇè
( Centrifuge Model Tests on Trafficability of Very Soft Ground Treated with Geotextile and Sand Mat ) |
| Àü»óÇö;ÀÌÁ¾È£;À¯³²Àç; ¼¼°æ´ëÇÐ Åä¸ñ°ú;°æµ¿´ëÇб³ ÇØ¾ç½ÉÃþ¼öÇаú;°¿ø´ëÇб³ Åä¸ñ°øÇаú;
|
|
|
 |
|
| |
| ÃÊ ·Ï |
| º» ¿¬±¸¿¡¼´Â ÃÊ¿¬¾àÁö¹ÝÀÇ ÀåºñÁøÀÔÀ» À§ÇØ Åä¸ñ¼¶À¯¿Í ¸ð·¡¸¦ Æ÷¼³Çϴ ǥÃþº¸°°ø¹ýÀÇ ÁöÁö·Â Æò°¡¸¦ ¸ñÀûÀ¸·Î 50g Á߷¼öÁØÀÇ ¿ø½É¸ðÇü½ÇÇèÀ» ¼öÇàÇÏ¿´´Ù. ¿¬¾àÁö¹ÝÀÇ ºñ¹è¼ö Àü´Ü°µµ¸¦ 3.1~11.7kPa·Î Á¶¼ºÇϰí, Åä¸ñ¼¶À¯¿Í ¸ð·¡¸¦ ¼³Ä¡ÇÑ ¸ðÇüÁö¹Ý¿¡ ÀåºñÇÏÁßÀ» ¸ð»çÇÑ ±âÃʸðÇüÀ» ÇÏÁßÀçÇÏÀåÄ¡¿¡ ¿¬°áÇÏ¿© ÁöÁö·Â ½ÇÇèÀ» ¼öÇàÇÏ¿´´Ù. ¿ø½É ÀÌ·ÐÀû Á¦¾È½Ä°ú ¼öÄ¡ÇØ¼®À» ¼öÇàÇÏ¿© ºñ±³ÇÏ¿´´Ù. ½ÇÇè°á°ú Áö¹Ý°µµÀÇ Áõ°¡¿¡ µû¶ó ÁöÁö·ÂÀÌ Áõ°¡ÇÏ´Â ÇÏÁß-ħÇÏ °ü°è¸¦ ȹµæÇÏ¿´À¸¸ç, °üÀÔ ¶Ç´Â ±¹ºÎÀü´ÜÀÇ ÆÄ±«°æÇâÀ» °üÂûÇÏ¿´´Ù. ÀÛÀº ºñ¹è¼ö Àü´Ü°µµÀÇ Áö¹Ý¿¡¼´Â ħÇÏÀÇ °Åµ¿ÀÌ Àåºñ ÁÖÇ༺ Æò°¡ÀÇ Áß¿äÇÑ ÀÎÀÚÀε¥ ¹ÝÇÏ¿© Å« ºñ¹è¼ö Àü´Ü°µµÀÇ Áö¹Ý¿¡¼´Â ÁöÁö·ÂÀÌ Áö¹èÀû ºñ¹è¼ö Àü´Ü°µµ¿¡ µû¸¥ ÁöÁö·Â°ú ħÇÏ·®ÀÇ È¸±ÍºÐ¼®½ÄÀ» »êÁ¤ÇÏ¿© ÀåºñÀÇ ÁÖÇ༺ È®º¸¸¦ À§ÇØ ÁöÁö·ÂÀ» Æò°¡ÇÒ ¼ö ÀÖ´Â ¹æ¾ÈÀ» Á¦¾ÈÇÏ¿´´Ù. ¼öÄ¡ÇØ¼® °á°ú, ½ÇÇè°á°ú¿Í À¯»çÇÑ ÇÏÁß-ħÇÏ °ü°è¸¦ ¾òÀ» ¼ö ÀÖ¾ú´Ù. |
|
| In this study, centrifuge model tests with 50 g gravitational condition were performed to evaluate the bearing capacity of very soft ground, improved by spreading geotextile and sand on the surface of ground, for the heavy machinery to be able to access. For undrained shear strength of ground model, prepared with the clay sampled from the field, being in the range of 3.1~11.7 kPa, bearing capacity tests were performed with the model footing and the loading system built to simulate the heavy machinery on the ground model treated with geotextile and sand. Test results were compared with theoretically and numerically evaluated ones. Test results about load-settlement curves showed that the bearing capacity increases with the increase of the undrained shear strength of ground. Punching shear or local shear failure was also observed. For a relatively low undrained shear strength of ground, settlement behavior is found to be crucial to evaluating the trafficability of machinery whereas bearing capacity becomes a dominant factor with the increase of undrained shear strength of ground. The method for assessing the bearing capacity of the ground related to trafficability of machinery is presented by acquiring the regression relationship between the contact pressure of machinery and settlements using load-settlement curves with the change of the undrained shear strength. Furthermore, results of numerical analyses about load-settlement relation are in relatively good agreement with those of centrifuge model test. |
| |
| Ű¿öµå |
| Bearing capacity;Geo-centrifuge;Geotextile;Surface treatment method;Very soft clay; |
| |
|
|
 |
|
Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.26, no.3, 2010³â, pp.13-23
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO201020439056373)
¾ð¾î : Çѱ¹¾î |
|
| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
|
|
|
|
|
|