Abstract: The structural design difference among anti-slide piles, bridge piles and ordinary lateral loaded piles is that anti-slide piles allowed larger horizontal displacement and more reinforcement than ordinary piles. The load structure calculation method of the anti-slide piles adopt allowable displacement in 10 mm. This way can't fully play resistance capability of a large displacement in the design of anti-slide pile. Using the principles of reinforced concrete flexural members mechanics, the paper introduced of the crack control guidelines. On the basis of the load-structure calculation method, replaced the horizontal displacement control by crack guidelines, it carried out anti-slide piles design checking. This method can be developed to maximize the resistance capacity of anti-slide piles. The formula of anti-slide piles design checking method is derived based on "K" method. And the principle, calculation and design process of the crack control design method of anti-slide are described. Taken the project of the K593+850-K594+070 landslide of the Shiyan-Tianshui highway as an example, the paper analyzed composition and influencing factors of the anti-slide pile with top horizontal,and compared the crack control design method with traditional design methods.

Key words: landslide design, anti-slide piles calculation method, horizontal displacement, crack