摘要
采用静载荷试验及数值计算相结合的方法进行了螺纹桩承载性能的研究。分析了螺齿宽度、螺距等桩型参数对螺纹桩承载性能的影响,对外径相同的直径桩与螺纹桩的承载性能进行了静载荷对比试验研究。螺纹桩单桩极限承载力较相同桩外径的直型桩极限承载力稍高,螺齿宽度对螺纹桩的极限承载力影响非常明显,随螺齿宽度的增加螺纹桩的极限承载力增大;螺距对极限承载力影响也较为明显,随螺距的减小,螺纹桩的极限承载力增大。螺纹桩在低荷载水平下,桩侧阻力沿桩身均匀发挥,桩端阻力较小,随荷载水平的增大,桩端阻力大幅提高,并提出螺纹桩承载力的计算公式。
Bearing capacity behavior of roll forming filling screw pile（screw pile for short） is investigated through numerical calculation and static load test.The influence of pile-type parameters,such as width of thread tooth and thread pitch,on the ultimate bearing capacity of crew pile is studied;furthermore,the bearing capacity behavior of screw pile and that of pile with the same diameter are compared and analyzed through static load test.The results show that the ultimate bearing capacity of screw pile is a bit higher than that of pile with the same outside diameter;width of thread tooth has a distinct effect on ultimate bearing capacity which increases with the increment of width of thread tooth.When the screw pile is tested under light load,the resistance on pile side is distributed along screw pile,and tip resistance is small,but the resistance rises considerably with load increasing.Besides,the design formula of bearing capacity of screw pile is proposed.
出处
《土木建筑与环境工程》
CSCD
北大核心
2011年第3期19-24,共6页
Journal of Civil,Architectural & Environment Engineering
基金
国家自然科学基金项目(40571032)
铁道部科技开发计划项目(2006G001-B-3)
关键词
滚压成型灌注螺纹桩
静载荷试验
承载力
桩型参数
roll forming filling screw pile
static load test
bearing capacity
pile-type parameters
