Comparative study on double-row piles with different lengths several common anti-slide piles

There are huge differences in internal force and deformation between the front and back rows of double-row anti-slide piles, so they cannot display their sliding resistances simultaneously and adequately. The slide may originate from pile head in the slope reinforced by deeply buried anti-slide piles. In order to solve the above problems, a new concept is put forward that the double-row piles with shorter back row can be used. A finite element model is established and the maximum bending moments and shear forces in the front and back rows of piles with different embedded depths of back row are obtained and discussed. It is indicated that the maximum bending moments, shear forces and deformation degree in the front row of piles are close to those in the back row when the embedded depth in back row increases to a certain value, and this value can be regarded as the design embedded depth. Through comparison with those of several common anti-sliding piles, the internal force and deformation in the front and back rows of the proposed piles are more reasonable, and the two rows of piles can display their sliding resistances adequately. The internal forces are relatively small, and the counter bending moments can be avoided. What’s more, it can save materials and reduce the cost.