MECHANICAL MODEL AND DESIGN OF DOUBLE-ROW ANTI-SLIDING PILES FOR SLOPE STABILIZATION IN MOUNTAINOUS REGIONS OF WESTERN CHINA

The method of structural mechanics for multi-row piles that are commonly used in bridges of roads and railways is introduced to the double-row anti-sliding piles for slope stabilization. The difference is the soil body above the slide surface. However, above the scour-line of bridge, it doesn't consider the influence that the soil- body to the m method of under the slide surface. In this paper, the perfect m-method 1 and the perfect m-method 2 are presented and they consider the effect of the sliding soil body. And in this paper, the soil pressures in the back of front-row pile and in the front of back-row pile above the slide surface are researched in project application. The results are gained that the soil pressure in the front of back-row pile could be equal to the rest soil pressure, and that the soil pressure in the back of front-row pile could be equal to the summation of the rest soil pressure and the slide force caused by the slide body between the double-row anti-sliding pile. At the same time, the finite bar element method is used to analyze the influence of connect-girder rigidity. The rigidity ratio of beam and column equal to 0.48 is found to be appropriate when the distance between double-row pile is not less than the value presented by criterion JTJ024-85 or 464-2005. The increase of the rigidity ratio is not significant. It is considered that the double-row piles are cost saving and have strong capability of resisting deformation. It's worthy of further investigation and extensive application.