Special-shaped drainage anti-skidding pile and construction method thereof

Abstract

The invention discloses a special-shaped drainage anti-skidding pile and a construction method thereof. The special-shaped drainage anti-skidding pile comprises a pile body coated with an outer protective wall. The cross section of the pile body is of a trapezoidal structure, the long side of the trapezoidal structure is a pile body soil-facing layer, the short side of the trapezoidal structure isa pile body soil-opposite face, a formwork obliquely stretching to the pile body soil-facing face is arranged from the top of the soil-opposite face of a pile body cantilever section to the pile top,a wedge-shaped cavity between the formwork and the soil-opposite face of the outer protective wall is filled with gravel, a water collecting pipe is vertically arranged in the wedge-shaped cavity, adrainage pipe at the bottom of the water collecting pipe obliquely penetrates out of the pile body soil-facing face downwards. A water drainage hole is formed in the soil-opposite face of the outer protective wall, and a water drainage shock pipe is inserted into the water drainage hole. The long side of the trapezoidal structure of the pile body is the soil-facing face, the acting width of the pile body is increased, ,the deformation resisting capacity of the anti-skidding pile is improved, and the safety of a slope is guaranteed; the cross section of the cantilever section is linearly reduced from bottom to top, the construction cost is reduced, a vertical water drainage system is integrated on the pile body cantilever section, the water drainage effect is good, and the safety of the anti-skidding pile is guaranteed.

Description

technical field [0001] The invention relates to an anti-slide pile, in particular to a special-shaped drainage anti-slide pile, and also relates to a construction method of the special-shaped drainage anti-slide pile. Background technique [0002] The anti-slide pile is to penetrate the pile body into the rock and soil mass, relying on the strong anti-deformation ability of the pile body to resist the sliding force of the sliding body, so as to ensure the safety of the slope. Due to the advantages of small excavation surface, small masonry volume, flexible layout location, fast construction speed and good reinforcement effect, anti-slide piles are widely used in fields such as water conservancy, highways, railways and construction engineering, and are suitable for remediation of shallow and medium Thick and deep large-scale landslides. According to the thickness of the landslide body, the size of the thrust, waterproof requirements and construction conditions, etc., wooden ...

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Problems solved by technology

Both of the above two anti-slide piles have the following defects in the later use: firstly, the resistance of the soil cannot be fully exerted; secondly, due to the large sliding force of the retaining block, the cross-sectional size of the pile body is often large, and the project cost is high , taking the Zhaojiatang landslide east of Shimiaogou Station on the Xiangyu Railway as an example, the landslide is reinforced with rectangular piles, and the maximum cross-sectional area of ​​the rectangular piles is 24.5m 2 , the pile length is 50m, and the price of reinforced concrete per square is 1,500 yuan. It can be seen that the cost of a single anti-slide pile is as high as 1.8 million, which is high; third, the drainage system of the existing landslide and the anti-slide pile are set independently. When the water volume is large, it is necessary to set up deep drainage pipes or vertical seepage wells for drainage. The validity period of the deep drainage pipes is only 2 years, resulting in the inability to drain the accumulated water in the later stage, and the vertical seepage wells have a large plane size, which further increases Project cost; Fourth, before construction, the bending moment and shear force of the pile body are usually calculated using the cantilever pile method and the elastic foundation beam method. These two calculation methods can only be used to calculate conventional circular and square anti-slide piles. Moreover, the process is cumbersome, and it is easy to make mistakes in the design process. Due to the limitation of the accuracy of the coefficients provided in the calculation table, the design results have large errors, and the phenomenon of inconsistency with the theoretical assumptions occurs, increasing the amount of calculation.

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