Mechanical drilling cast-in-place pile

Abstract

The invention relates to a mechanical drilling cast-in-place pile, and belongs to the technical field of burying of load boxes of the mechanical drilling cast-in-place piles. The mechanical drilling cast-in-place pile comprises the load box, wherein an upper section steel reinforcement cage and a lower section steel reinforcement cage are respectively connected with the upper end and the lower end of the load box; guide bars are welded between the upper section steel reinforcement cage and the load box; outer steel reinforcement cage stirrups are arranged on the outer rims of the upper section steel reinforcement cage and the lower section steel reinforcement cage; an annular plate is arranged at the lower end of the lower section steel reinforcement cage. The annular plate is additionally welded at the bottom end of the lower section steel reinforcement cage, so that the steel reinforcement cages and the load box can be kept at the center of a pile hole as much as possible during burying, and the phenomenon of higher data deflection of two lower displacement rods in a later detection process can be avoided.

Description

technical field [0001] The invention relates to a mechanically drilled cast-in-situ pile, which belongs to the technical field of embedding of mechanically drilled cast-in-place pile load boxes. Background technique [0002] In recent years, with the widespread application of mechanically drilled cast-in-place piles and self-reflexive force balance load boxes, when a large number of mechanically drilled cast-in-situ piles are constructed, there will be tapers at the bottom caused by construction machinery drill bits. However, during the placement of the load box and the steel cage, the lowermost steel cage was inserted into the taper hole, causing the steel cage and the load box of the entire pile to tilt, resulting in inaccurate data in the later detection process, and even caused by uneven force. Concrete breakage in the pile body affects the quality of the pile body, and there is no welding trumpet rib (guide rib) on the upper panel of the load box of the mechanically dri...

AI Technical Summary

Problems solved by technology

However, during the placement of the load box and the steel cage, the lowermost steel cage was inserted into the taper hole, causing the steel cage and the load box of the entire pile to tilt, resulting in inaccurate data in the later detection process, and even caused by uneven force. Concrete breakage in the pile body affects the quality of the pile body, and there is no welding trumpet rib (guide rib) on the upper panel of the load box of the mechanically drilled cast-in-place pile, so that the grout tube cannot pass through the middle of the load box smoothly during the placement process. Pouring concrete directly on the upper plate of the load box will reduce the pouring pressure and cause the sediment at the bottom of the load box to not be cleaned effectively or the pouring will not be dense, etc.

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