Construction method of building cast-in-situ bored pile

Abstract

The invention discloses a construction method of a building cast-in-situ bored pile. The construction method comprises the steps of drilling in advance, cleaning, burying a shield-tube, preparing mud, drilling by using a machine and discharging the residue of the mud in a circulating way, reaming, performing borehole cleaning, making and placing a steel reinforcement cage, and pouring concrete. According to the construction method, geological conditions can be known before filling the pile by means of drilling in advance, and whether the geological conditions meet construction conditions or not can be determined, so that the type of a drilling machine is more easily determined in advance, and the construction efficiency and project quality are improved; the drilling machine and components and indexes of the mud are selected according to the geological conditions, so that the construction efficiency is very high, a great deal of manpower is saved, and construction is safe; the steel reinforcement cage adopts a triangular reinforcement frame and a concrete base, so that the strength and stability of the steel reinforcement cage are improved; therefore, the construction method of the building cast-in-situ bored pile has the advantages of high safety, environment friendliness, high efficiency and wide application scope. The building cast-in-situ bored pile has the advantages of being high in supporting strength and high in quality.

Description

technical field [0001] The invention belongs to the technical field of building pile foundation construction, in particular to a construction method of bored piles for building pile foundations. Background technique [0002] Cast-in-situ piles are made by directly opening holes on the designed pile positions with a circular cross-section. After the holes are formed, a reinforcement cage is placed in the holes and concrete is poured. Cast-in-place piles are widely used in construction. According to different hole-forming techniques, it can be divided into bored cast-in-place piles, immersed pipe cast-in-place piles, manual digging cast-in-place piles, and explosive expansion cast-in-place piles. Bored cast-in-situ pile refers to a pile formed by drilling a pile hole with a drilling machine, first hanging a steel cage in the hole, and pouring concrete in the hole. Due to the advantages of no vibration, no soil extrusion, low noise, and suitable for use in densely built urban...

AI Technical Summary

Problems solved by technology

However, this type of pile hole has the following disadvantages: the labor intensity in digging the hole is relatively high, the construction speed of the single pile is slow, especially the safety is poor, and dangers such as landslides are prone to occur. When scattered into the hole, a large amount of toxic gas will be deposited at the bottom of the pile hole, which will bring safety hazards to construction safety