中南大学学报（自然科学版）2012，Vol.43Issue(9)：3575-3581,7.
南沙地区钉形水泥土搅拌桩荷载传递规律的试验研究
Load transfer mechanism of T-shaped soil-cement deep mixing pile in Nansha area, Guangzhou
摘要
Abstract
T-shaped soil-cement deep mixing column was used in the soft foundation reinforcement of one urban road in Nansha area of Guangzhou. Axial force and stress and shaft resistance of two T-shaped soil-cement deep mixing piles, in which equipped strain gages, were studied in the process of pile's load test. The result shows that because of effects of the variable section of T-shaped piles, its axial force and stress vary greatly on both sides of pile's variable section, and curves of axial force-depth and stress-depth are convex forms obviously. The area above pile's variable section concentrates the main axial force and stress, which accounts for 58.79% and 78.82% respectively, but the area below the variable section, where the length of pile body is 12.0 m, only accounts for 42.21% and 21.17%, respectively. The curve of pile's shaft resistance-depth has obvious segmentation and presents a "S" type. The shaft resistance of the upper 4.5 m length of piles accounts for 88.89%, but shaft resistance of the lower piles of 10.5 m length just accounts for 11.11%.关键词
钉形水泥土搅拌桩/载荷/变截面/桩身应力/桩身侧摩阻力Key words
T-shaped soil-cement deep mixing column/load tests/variable section/column body stress/column lateral friction resistance分类
建筑与水利引用本文复制引用
罗大生,肖超,张可能,何杰,陈星光..南沙地区钉形水泥土搅拌桩荷载传递规律的试验研究[J].中南大学学报（自然科学版）,2012,43(9):3575-3581,7.基金项目
国家自然科学基金资助项目(51078140,51108176) （51078140,51108176）
湖南省博士生科研创新项目(CX2010B050) （CX2010B050）
