Deformation Control Method of the Anti-slide Pile Under Trapezoidal Load in the Zhangjiawan landslide
October 26, 2020 Author
Anti-slide piles are set in the Zhangjiawan landslide area, where the general features of the bedrock below the slip surface include upper weak and lower hard strata. Based on a site investigation, the horizontal displacement of the anti-slide pile head is 14.8 cm, which is not conducive to the stability of the landslide. In the study, a displacement calculation method for the pile under trapezoidal load is proposed for a colluvial landslide controlling. Furthermore, factors affecting the deformation and internal forces of the pile were also studied. The results indicated that (1) when the embedded length of an anti-slide pile increases, the horizontal displacement on the pile and maximum absolute shear force decrease, while the bending moment of the pile exhibits opposite trends; (2) the relationship between maximum shear force and maximum bending moment is a linear with increasing driving force of landslide; and (3) increase in the ratio of the driving force between the pile head and slip surface (q0/q1) steadily increases the horizontal displacement of the pile. The relationship between the distribution of the driving force (q0/q1) and the reasonable embedded length of a pile is a quadratic function, which can be used to determine the reasonable embedded length of a pile under the action of rectangular or triangular loads. It is very useful to use the above method to guide the design of anti-slide piles in similar areas.
Figure. 1 Stress and deformation model of an anti-slide pile under a trapezoidal load in two different strength strata. (a) Sketch of the lateral trapezium load acting on a pile, and ( b) Composition of anti-slide pile deformation
(a) (b)
Figure.2 Calculation results of the displacement and internal forces of the pile under different embedded lengths (h) with q0/q1= 0. (a) Shear force, (b) Bending moment,
(a) (b)
Figure.3 (a) Calculation results of the maximum bending moment and the maximum shear forces above or below the slip surface of the pile under different driving force. (b) Interrelation curve between the dimensionless displacement of the pile head and the embedded ratio of the pile with different values of q0/q1.
Research Publish:
Wang, H., Lv, Z., Qin, H., Yue, J., & Zhang, J. (2020). Deformation Control Method of the Anti-slide Pile under Trapezoidal Load in the Zhangjiawan Landslide. Advances in Civil Engineering, 2020, 1. [1405610]. https://doi.org/10.1155/2020/1405610