Efficient construction structure and method for micro steel pipe pile

Abstract

The invention discloses an efficient construction structure for a micro steel pipe pile. The efficient construction structure comprises an anchor rod static pressure pile construction mechanism and asteel pipe pile construction mechanism; the anchor rod static pressure pile construction mechanism comprises a foundation arranged on pile periphery soil, a pile pressing hole is formed in the foundation, and a reaction frame is mounted on the position, corresponding to the pile pressing hole, of the foundation through a plurality of anchor rods; a baffle is mounted on the reaction frame, and a jack is mounted on the baffle; and the steel pipe pile construction mechanism comprises a drilling rig, a rotating device, a geological pipe and a drilling bit. The efficient construction structure hasthe beneficial effects that firstly, anchor rod static pressure piles are constructed on to-be-supported positions of the ground foundation, a foundation pit and a slope, then the steel pipe pile is constructed, due to the wall protecting effect of the anchor rod static pressure piles, drilling of the steel pipe pile is not subjected to frictional resistance of a soil mass within the pile length range of the anchor rod static pressure piles, in this way, the construction speed of the steel pipe pile is ensured, the pile length can be increased, it is ensured that the steel pipe pile reaches abearing layer, and the efficient construction structure is especially suitable for a loess area or a large-thickness filling area.

Description

technical field [0001] The invention relates to a high-efficiency micro-steel pipe pile construction structure and method. Background technique [0002] Due to its unique advantages of small pile diameter and high bearing capacity, micro steel pipe piles have been widely used in the fields of building foundations, foundation pits and slopes. Two forms are mostly used, one is anchored static pressure piles, and the other is mechanical drilling with pipe drilling. [0003] The determinations of the two micro-pile forming methods are: when the anchor static pressure pile encounters hard ground, it is difficult to press the pile, and the pile length cannot meet the design requirements. The second mechanical hole forming method is similar to cast-in-situ piles, which require mud wall protection, and the pile length is longer than that of anchor static pressure piles, but due to the small diameter of the piles, it is easy to encounter the phenomenon of drill sticking. [0004] F...

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Problems solved by technology

[0003] The determination of the two micro-pile forming methods are: when the anchor static pressure pile encounters hard ground, it is difficult to press the pile, and the pile length cannot meet the design requirements

The second mechanical hole forming method is similar to cast-in-situ piles, which require mud wall protection, and the pile length is longer than that of anchor static pressure piles, but due to the small pile diameter, it is easy to encounter the phenomenon of drill sticking

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