Abstract: Sloped weak ground under the load of the embankment easily triggers major engineering accidents such as large lateral deformation and slump. It is the core design principles of embankment on sloped weak ground that application of reinforced by concrete anti-slide pile at the corner of embankment can effectively limit lateral deformation of the foundation. This paper studies the influence of the pile design parameters such as pile spacing, pile length, elastic modulus, cross-section dimension and the position of piles on its internal forces and deformation by using 3D fast Lagrangian analysis of continua, comparing with the results of indoor geotechnical centrifugal model tests, and building precise numerical analysis model of embankment on sloped weak ground reinforced by anti-slide piles. Research results show that, using anti-slide piles at the downhill toe of embankment could significantly restrict the lateral deformation of sloped weak ground. It will comprehensively consider the factors such as force, economy, construction etc. in order to confirm the reasonable pile spacing; anti-slide piles must penetrate potential slip surface, but with the increase of the length of pile, the reinforcement effect does not significantly increase; with the increase of elastic modulus, cross- section dimension of pile, the reinforcement effect is improved in some extent; anti-slide pile is suitable to set at the middle of bypass downhill slope of the embankment

Key words: highway engineering, sloped weak ground, embankment, anti-slide pile, finite difference method