Accumulated landslide-micro anti-slide pile combined structure based on cooperative working principle

Abstract

The invention discloses an accumulated landslide-micro anti-slide pile combined structure based on a cooperative working principle, and belongs to the technical field of geotechnical engineering. Thestructure comprises a set of flexible micropiles which penetrate through an accumulation body layer, are anchored on base rocks and are different in stiffness, and connecting beam components connectedwith the miropiles. The micropiles with high stiffness can reduce movement deformation of accumulation bodies and achieves the slide prevention function; and certain deformation of soil around the micropiles is allowed by the micropiles with low stiffness; and the purpose of reinforcing the accumulation bodies is achieved. By designing a combination mode of the micropiles of three types, pile soil forms a combined body with higher stiffness, is equivalent to a large anti-slide pile and jointly forms a whole to bear external loads. According to the combined structure, certain deformation of the accumulation bodies is allowed, the capacity of pile-soil deformation cooperative combined action is fully achieved, and the accumulated landslide-micro anti-slide pile combined structure has the advantages of being small in rock and soil layer disturbance, short in construction period, low in construction cost and the like.

Description

technical field [0001] The invention relates to accumulation landslide prevention technology, more specifically, relates to an accumulation type landslide-miniature anti-slide pile group combined structure based on the principle of cooperative work, and belongs to the field of geotechnical engineering. Background technique [0002] Most of the valley deposits are potentially unstable. Once they encounter changes in external conditions, they may cause deformation, slippage or even destruction, forming geological disasters. The prevention and control of geological hazards caused by slope instability has always been the focus of geotechnical engineering research. [0003] Miniature anti-slide piles, as a light anti-slide structure, are gradually being applied in the field of landslide control. However, at present, the mechanical mechanism and calculation theory of micro-pile group reinforced accumulation are not yet mature, and the theoretical research lags behind the engineer...

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Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome the defects of the existing micro-pile control method for landslides, and propose a combination structure of micro anti-slide pile groups designed based on the principle of pile-soil collaborative work that considers different accumulation volumes and reinforces accumulation slopes , making full use of the self-stabilizing ability of the accumulation body, thereby effectively reducing the material cost of the retaining structure, reducing the disturbance of the rock and soil layer of the accumulation body during the construction of the retaining structure, and shortening the construction period

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