摘要
利用自行开发的大型土工试验模型槽,进行了等截面积X形桩和圆形桩抗拔性能对比试验研究,比较了二者轴力、桩侧摩阻力及位移的分布和变化规律。X形桩相比圆截面桩侧表面积增加了31.5%,试验结果表明,二者桩侧摩阻力分布规律相同,沿桩长可分为提高区域、衰退区域;摩阻力发挥充分的区域在埋深1.50～3.00m,此区域中X形桩摩阻力的最小值和峰值都较圆形桩大,相同的桩头位移下X形桩的侧摩阻远大于圆形桩,其极限抗拔力高出圆形桩约16.7%。
Comparative test study of anti-pulling property of X-shaped pile and circular section pile with constant section is carried out in the self-developed large-scale soil test model chamber.The distributions of axial forces,lateral frictions and displacement are analyzed.the lateral surface of The X-shaped pile is 31.5% greater than the circular section pile;but the distributions of lateral friction force along pile shaft are almost the same,which consist of two different zones,raising zone and decay zone.The friction force is fully exerted from 1.5 m to 3 m away the pile head,and the minimum value and peak value of X-shaped pile in the area are larger than circular section pile.Under the same settlements,the lateral friction force of X-shaped pile is greater than circular pile.The results show that the ability of X-shaped pile to resist uplift force is 16.7% higher than that of the circular pile.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2010年第11期3430-3434,共5页
Rock and Soil Mechanics
基金
江苏省"333"高层次人才项目(NoB08003)
江苏省青蓝工程创新团队项目
河海大学自然科学基金项目(No2009423711)资助
关键词
X形混凝土桩
模形试验
抗拔试验
桩侧摩阻力
X-shaped concrete pile； model test； anti-pulling test； pile lateral friction；
