摘要
针对新型扩挤支盘混凝土灌注桩的竖向承载力、沉降、桩侧摩阻力等竖向承载特性及桩身荷载传递规律的问题进行了数值模拟研究。研究表明:相对于等截面桩,扩挤多支盘混凝土灌注桩具有承载力高、沉降量小的特性,支盘桩的极限承载力相较等截面桩竖向承载力提高了100%,沉降量大幅减小,两者最大沉降差可达19.781mm。桩身轴力在支盘处变化突出,支盘分担竖向力效果显著;适当增加支盘的个数可以大幅减小桩底荷载,减缓桩侧摩阻力的增加速度。
In this paper, FLAC^3D numerical study on the axial bearing behaviors and the load transfer behavior of the squeezed branch pile in terms of the vertical bearing capacity, the settlement and the lateral friction resistance of the new type of reinforced concrete filling pile. The results showed that compared with the common piles, the squeezed branch pile had the characteristics of higher bearing capacity and smaller settlement. The vertical bearing capacity was improved by 100%, the settlement was reduced greatly, with the maximum settlement difference up to 19. 781mm. The axial force of the pile prominently changed at the support branches and the supporting branches shared the vertical force obviously; moreover increasing the number of the supporting branches could significantly decrease the pile bottom load and retard the lateral friction resistance of the squeezed branch pile.
出处
《安徽理工大学学报（自然科学版）》
CAS
2017年第6期71-75,共5页
Journal of Anhui University of Science and Technology:Natural Science
基金
国家自然科学基金资助项目(51774011)
关键词
扩挤多支盘桩
承载力
沉降
桩侧摩阻力
FLAC^3D
squeezed branch pile
bearing capacity
settlement
lateral friction resistance
FLAC^3D
