Landslide anti-slide pile design method based on bridge abutment deformation control

Abstract

A landslide anti-slide pile design method based on bridge abutment deformation control aims at overcoming the defects of a traditional transfer coefficient method and a finite element strength reduction method and effectively solving the design problem of pier foundation deformation control on a landslide (rock mound). The method comprises the following steps: (1), establishing a landslide three-dimensional numerical model; (2) establishing a pier foundation in the landslide three-dimensional numerical model; (3) determining a deformation allowable value [delta] of the pier foundation, and comprehensively determining a stability safety coefficient K; (4) reducing the strength parameter of the slip band or the slip surface, taking a comprehensive reduction coefficient F = K, and solving thedeformation delta of the pier foundation; (5) judging whether pier foundation deformation meets delta < = [delta] or not; (6) establishing an anti-slide pile in the landslide three-dimensional numerical model, simulating the anti-slide pile by adopting a pile unit, and solving the deformation delta of the pier foundation according to the step (4); (7), judging whether deformation of the pier foundation meets delta < = [delta]; and (8) outputting a shear force and bending moment distribution diagram of the anti-slide pile, performing structural reinforcement, and drawing a design drawing.

Description

Technical field [0001] The invention relates to landslide (rock pile) treatment and bridge pier and abutment reinforcement, in particular to a landslide (rock pile) anti-slide pile design method based on bridge pier and abutment deformation control. Background technique [0002] Complicated and difficult mountainous areas have steep terrain, high mountains and deep valleys. The lines have crossed river valleys or traveled along valleys many times. Affected by topography, geology and comprehensive route selection, it is impossible to avoid a certain number of bridge piers on landslides (rock piles). The stability of landslides and rock piles is poor, and the excavation of bridge foundation pits can easily cause partial collapse of the slope or overall instability. Bridge pier foundations are often subject to bias, especially under severe conditions such as heavy rain and earthquakes, which may cause lateral deformation, which affects the normal use and safety of the structure. Br...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a design method for landslide anti-slide piles based on the deformation control of bridge piers, to overcome the deficiencies of the traditional transfer coefficient method and the finite element strength reduction method, and effectively solve the problem of bridge pier foundations on landslides (rock piles). Deformation Control Design Challenges

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