The Stress Mechanism And Application Of Anti-slide Pile Foundation

As a kind of piles which can bear landslide thrust as well as vertical load generated by the upper structure, the anti-slide pile foundation can be applied in the landslide or horizontal thrust area. In this paper, the numerical simulation of ANSYS and indoor model test are applied to investigate the bearing mechanism and its applicability, and the corresponding design method. The research achievements are as follows:(1)The best load ratio of the anti-slide pile foundations is about 0.30. ANSYS simulation is applied to the anti-slide pile foundations with different ratio load. Based on pile displacement and internal force, the best load ratio is proposed. Therefore, when designing this kind of pile, it will be better to control the vertical load on single pile accounted for 0.30 times of landslide thrust.(2)The best embedded depth ratio of the anti-slide pile foundations is about 0.42. Based on the commonly used anti-slide pile embedded depth range and the best load ration proposed before, from the perspective of the pile displacement and internal forces, the embedded depth optimum ratio is about 0.42. Therefore, when designing the anti-slide pile foundation, it is best to control the length of embedded section accounted for approximately 0.42 times the length of the pile.(3)Design indoor model test of anti-slide pile foundations. Measuring the displacement of the pile and the pile strain under different load ratio, and calculating bending moment. The law of displacement of pile and pile moment are similar to the results of the numerical simulation.(4)Based on elasticity assumptions and the exsiting formula, deduced the general expression of deflection differential equation of anti-slide pile foundations when considering the side friction and pile weight, caculated the internal forces and displacements of embedded segment and anti-slide segment.