Abstract
Anti-slide piles play an important role in landslide control. However, owing to a limitation in the slide–resist design concept, large landslides are difficult to control. Moreover, the displacements of controlled projects are significant. In this paper, we propose an improved anti-slide pile design concept that develops and utilizes the landslide body. On this basis, we also design an arm-stretching-type anti-slide pile structure. We establish formulas for calculating the internal forces of this structure. The results of a case study indicate that the maximum shear force and bending moment of the arm-stretching-type anti-slide pile body were reduced by 43.6% and 25.4%, respectively, compared with those of a conventional single pile. Furthermore, the results of numerical modeling indicate that the arm-stretching-type anti-slide pile could significantly reduce landslide displacement. Thus, the proposed design is expected to solve the problems encountered when using conventional anti-slide piles for landslide control and can thereby become widely applicable in practice.
Highlights
For the control of both artificial and natural slopes, anti-slide retaining measures are often adopted
The results of a case study indicate that the maximum shear force and bending moment of the arm-stretching-type anti-slide pile body were reduced by 43.6% and 25.4%, respectively, compared with those of a conventional single pile
The results indicate that the novel pile can fulfill the proposed design concept of developing and utilizing the landslide body advantageously
Summary
For the control of both artificial (i.e., cut and fill) and natural slopes, anti-slide retaining measures are often adopted. The use of anti-slide piles is challenging in projects with stringent displacement control requirements These two factors limit the application of anti-slide piles in landslide control and restrict their further development. Both these factors stem from the limitation of the existing design concept of anti-slide piles To address this issue, an improved design concept for antislide piles is proposed which involves developing and utilizing the landslide body in the anti-slide pile design. The results indicate that the novel pile can fulfill the proposed design concept of developing and utilizing the landslide body advantageously. The application of this novel anti-slide pile is expected to address the problems that are encountered when using conventional antislide piles
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