A trapezoidal toed drainage anti-slide pile and its construction method

Abstract

The present invention relates to a trapezoidal toed drainage anti-slide pile and a construction method thereof. The overall cross section of the pile body is trapezoidal, the short side is the back soil surface, the long side is the soil facing surface, and the pile body is divided into solid bottom and toe, The lower solid pile body, the upper hollow pile body, the cross-sectional area of ​​the upper hollow pile body is not constant, and the cross-sectional area gradually decreases from bottom to top. There are three water collection spaces in the hollow pile body. Hole connection, the cross-sectional area of ​​the solid pile body is constant, and a drainage cushion is provided at the junction of the solid pile body and the hollow pile body. There are water diversion holes and drainage holes in the drainage cushion layer, and the water is discharged to the sliding bed on the facing soil surface through the drainage holes. The water space, water diversion holes, and drainage holes are all filled with permeable aggregates, and the bottom is solid and toed to expand around, and has a certain thickness. The invention can trigger the soil arch effect through the trapezoidal section shape, improve the anti-overturning ability through adding toes, reduce the water content of the sliding body through self-collection and drainage, and use less material than traditional anti-sliding piles.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering and geological engineering, and relates to a trapezoidal toed drainage anti-slide pile and a construction method, which are suitable for soil slope reinforcement greatly affected by rainfall or irrigation. Background technique [0002] As more and more slope sites are developed, geological hazards have become an important factor affecting structures in mountainous areas, and landslides are one of the most frequent geological hazards. Engineers often use retaining walls, anchors, slope cutting and load reduction, back pressure and anti-slide piles to control landslide hazards. Among them, anti-slide piles are easy to construct, cost controllable, and have good treatment effects, and are widely used in shallow and medium layers. landslide. [0003] Southwest China is a high-incidence area of ​​landslides, especially before and after the flood season, which has brought extremely ser...

AI Technical Summary

Problems solved by technology

In soil slopes, due to the lack of one side of the soil, the pile body is prone to overturning as a whole. At this time, increasing the strength of the pile body does not help to improve the anti-sliding ability. Few pile foundations are specially optimized for this point.

The results of existing physical and numerical tests show that the maximum bending moment and maximum shear force on the anti-sliding pile body appear near the sliding surface, but the traditional anti-sliding pile design often adopts a constant cross-sectional shape, which will inevitably lead to certain degree of waste

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