High-toughness functionally graded material slide-resistant pile and construction method

Abstract

The invention discloses a high-toughness functionally graded material slide-resistant pile. The high-toughness functionally graded material slide-resistant pile comprises a PVA-ECC material protection layer, tensile area small-particle-size coarse aggregate concrete and a compression area large-particle-size coarse aggregate concrete layer. The PVA-ECC material protection layer, the tensile area small-particle-size coarse aggregate concrete layer and the compression area large-particle-size coarse aggregate concrete layer are sequentially arranged from inside to outside in the landslide thrust direction, and different subareas are poured at the same time. Functional division is carried out according to different stress characteristics of the section of the slide-resistant pile, different material designs are carried out according to a gradient structure, and the prepared functionally graded material slide-resistant pile has high toughness, better deformation ductility and bending and shearing bearing capacity. Steel strands and the small-particle-size coarse aggregate concrete in the tension area can keep deformation coordination, meanwhile, the PVA-ECC protection layer with excellent ductile deformation is arranged on the portion bearing the landslide thrust, cracking damage is reduced, and the toughness and the bending resistance of the whole pile body are improved.

Description

technical field [0001] The invention belongs to the technical field of landslide reinforcement, and in particular relates to an anti-slide pile made of high-toughness functional gradient material and a construction method. Background technique [0002] As an effective landslide supporting component, anti-slide piles can effectively improve the anti-sliding ability of the slide body, improve the stability of the landslide, and achieve the purpose of landslide control. It is an effective measure for landslide control that is widely used at present. However, due to the low ultimate tensile strain of concrete and the poor ductility of steel bars, brittle failure is also prone to occur, resulting in local concentrated cracks in anti-slide piles during large deformation of landslides, which in turn causes structural failure of anti-slide piles. Toughness and resistance to deformation at large deflections can well slow down the failure of anti-slide pile structures. [0003] At pr...

AI Technical Summary

Problems solved by technology

Moreover, the cracking damage of brittle concrete will expose the steel bars and steel strands to the air to make them rust, and the advantages of steel strands that can resist large deformation cannot be fully utilized, so the effect is not ideal

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