Construction Method of Cast-in-place Pile Using Rotating and Stretching Reinforcement Cage

Abstract

The invention relates to the field of construction, in particular to a construction method of adopting a rotary extension type steel reinforcement cage to manufacture a cast-in-place pile. The construction method comprises the following steps that 1, the steel reinforcement cage is prepared, specifically, the size of the steel reinforcement cage is designed and calculated, the steel reinforcementcage is manufactured according to the size, and after the steel reinforcement cage is prepared, the positions of extension ribs are required to be marked on the top of the steel reinforcement cage; 2,a pile hole is punched, specifically, a certain gap is reserved between the inner diameter of the pile hole and the outer diameter of the steel reinforcement cage; 3, side holes are formed, specifically, the multiple side holes are formed in the side wall of the pile hole by using counterboring equipment, the positions of the side holes are marked on the top of the pile hole, and the elevation ofthe side holes is set; 4, the steel reinforcement cage is hoisted and put down, specifically, the steel reinforcement cage is hoisted to the position above the pile hole, and the position of the steel reinforcement cage is adjusted through rotating in the hoisting process, so that the marks, on the top of the steel reinforcement cage, of the extension ribs are aligned with the marks, on the top of the pile hole, of the side holes, the steel reinforcement cage is put down and is hoisted and put to the designated height corresponding to the elevation of the side holes, an inner cage body is rotated, and thus the top ends of the extension ribs gradually extend to the outer side of an outer cage body; and 5, concrete is poured to form the pile.

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 a rotating and stretching steel 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 circula...

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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