Study on the Effectiveness of Stone Column with Various Arrangement in the Improvement of Sand Properties

• Main Authors: Hua-Lung Yen, 顏華龍
• Other Authors: Kuang-Hsuang Chen
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/46012123107330223131

碩士 === 逢甲大學 === 土木工程所 === 94 === This study used the model stone column test to investigate the impact of improved area ratio (the ratio of stone column area and foundation area) on the improved soil installed with stone columns in terms of the bearing of vertical loading. The test results showed that the improvement with alignments of model stone columns was better than the improvement with purely an increase in the improved area ratio. Under the condition of the same stone column diameter, the improved coefficient of horizontal subgrade reaction did not rise with the increase of the stone columns installed. If stone columns were installed in loading concentrated locations, the improvement of the coefficient of horizontal subgrade reaction was better. If stone columns were installed in non reaction concentrated locations, the effect of the improvement was limited. Under the same alignment, larger diameters of grave stone columns had a better effect of improving the coefficient of subgrade reaction.