曲线螺旋桩竖向抗拔特性试验研究

曲线螺旋桩是一种新型的抗拔桩。目前，对曲线螺旋桩的抗拔特性还缺乏较为系统的研究，为此，基于室内模型试验，对直线型桩和不同螺旋宽度、厚度和间距的螺旋型桩的抗拔承载力进行了对比试验。结果表明:在同等位移限制条件下，螺旋桩极限抗拔承载力是直线型桩的1.38~2.14倍、螺旋宽度为15 mm是螺旋宽度为10 mm螺旋桩极限抗拔承载力的1.09倍、螺旋厚度为15 mm是螺旋厚度为10 mm螺旋桩的极限抗拔承载力的1.05倍、螺旋间距为50 mm是螺旋间距为100 mm螺旋桩的极限抗拔承载力的1.10倍。

Experimental Study on Vertical Uplift Characteristics of Curved Spiral Piles

The curved spiral pile is a new type of uplift pile. At present, there is a lack of systematic research on the uplift characteristics of the curved spiral pile. Hence, based on the indoor model test, the paper studies the uplift bearing capacity of the straight line pile and spiral pile under different width, thickness and space. The results show that under the same displacement condition, the ultimate uplift bearing capacity of the spiral pile is 1.38 to 2.14 times of that of the straight line pile, the pile with spiral width of 15 mm is 1.09 times of that of the pile with spiral width of 10 mm, the pile with spiral thickness of 15 mm is 1.05 times of that of the pile with spiral thickness of 10 mm, the pile with spiral space of 50 mm is 1.10 times of that of the pile with spiral space of 100 mm.