Construction Method of Cast-in-place Pile Using Extended Double-layer Reinforcement Cage

Abstract

The invention relates to the field of buildings, in particular to a construction method for manufacturing a cast-in-place pile through an unfolded type dual-layer reinforcement cage. The method comprises the following steps that 1, the reinforcement cage is manufactured, specifically, the dimensions of the reinforcement cage are designed and worked out, the reinforcement cage is manufactured according to the dimensions, and a person needs to mark the locations of extension rebars at the top of the reinforcement cage after manufacturing of the reinforcement cage is completed; 2, pile hole drilling is carried out, specifically, a certain gap is reserved between the internal diameter portion of a pile hole and the external diameter portion of the reinforcement cage; 3, side hole drilling is carried out, specifically, a plurality of side holes are formed in the side wall of the pile hole through a broaching device, the locations of the side holes are marked at the top of the pile hole, and the elevation of the side holes is set; 4, the reinforcement cage is suspended and placed down, specifically, the reinforcement cage is suspended to the position above the pile hole, the extension rebar marks at the top of the reinforcement cage are aligned with the side hole marks at the top of the pile hole, the extension rebars are kept in a converge state, the reinforcement cage is placed down and slowly inserted into the pile hole, the reinforcement cage is suspended to the specified height in correspondence with the elevation of the side holes, and after the reinforcement cage reaches the elevation, an inner cage body is moved and the extension rebars are unfolded; and 5, concrete is poured, and the pile is formed.

Description

technical field [0001] The invention relates to the construction field, in particular to a construction method for making cast-in-place piles by adopting an extended double-layer reinforcement cage. Background technique [0002] Pile structures are commonly used foundation structures in buildings such as houses, roads, bridges and docks. Among them, the friction pile is a pile that relies on the friction resistance of the pile side to support the vertical load. From the point of view of the principle of the friction pile, the friction resistance of the pile side is not only related to the nature of the soil, construction technology, pile material, etc., but also related to the periphery of the pile section. The perimeter and the concave-convex shape of the pile side surface are directly related. However, the cross-sectional shape of the conventional reinforced concrete pile is constant along the longitudinal direction, and the cross-sectional shape is also simple square or ...

AI Technical Summary

Problems solved by technology

However, the pile length cannot be increased arbitrarily, because not only the project cost is greatly increased, but also the pile length is limited by the slenderness ratio in the relevant design specifications

For example, CN104179174A discloses a kind of porous grouting pipe special-shaped pile. Grouting holes are set on the side wall of the pipe pile, and the concrete overflows from the grouting hole to form a stone body to improve the friction coefficient of the side wall, thereby increasing the frictional resistance. However, the The stone body does not contain steel bars, the stone body is relatively brittle, and is prone to fracture under high-strength pressure, thus affecting the load-bearing performance of the pile

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