Concrete hollow pile pouring method and device

Abstract

The invention discloses a concrete hollow pile pouring device. The concrete hollow pile pouring device comprises a pile barrel, wherein a pile body of the pile barrel is provided with a feeding port, the feeding port is arranged close to one end of the pile barrel, the pile barrel is arranged to be in a regular hexagonal prism shape, the six side faces of the pile barrel are cambered surfaces with the same radian, and each cambered surface deviates from the center axis of the pile barrel; the device further comprises a cylindrical sinking pipe, the sinking pipe is arranged in the pile barrel, the sinking pipe and the pile barrel are equal in height and are coaxially arranged, and the vertical bearing capacity and the horizontal bearing capacity are effectively improved by means of the cross section special-shaped effect and the improvement effect of pile core soil on pile side friction resistance. The invention further discloses a concrete hollow pile pouring method. The sinking pipe and the pile barrel are sunk to the designed depth of a foundation through a pile driver, concrete is injected into the pile barrel, and when the distance between the upper surface of the concrete in the pile barrel and the pile bottom is not less than 2 m, the pile barrel and the sinking pipe are pulled out to obtain a concrete hollow pile, so that the strength utilization rate of the concrete unit material is increased, and the construction cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of pouring devices, in particular to a pouring device for concrete hollow piles, and also to a pouring method for concrete hollow piles. Background technique [0002] The vertical bearing capacity of a pile is composed of two parts: the pile side friction resistance and the pile tip resistance. The play of the pile side friction resistance is particularly important in deep soft soil foundations. Rigid pile composite foundation treatment technology has been widely used in soft soil foundation treatment engineering fields such as highways, high-speed railways and high-rise buildings. Among them, how to improve the utilization rate of unit material strength and how to obtain a larger pile foundation bearing capacity while saving the amount of building materials are one of the important topics that researchers have been concerned about for a long time. [0003] For the prior art, the Chinese patent "Prefabricat...

AI Technical Summary

Problems solved by technology

However, due to the relatively small cross-sectional equivalent pile diameter and pile spacing of this pile type, the soil squeezing effect during pile foundation construction has a great influence on the pile quality of adjacent piles; the X-shaped arc radius is too large. If the arc angle is too small, the soil around the pile will be disturbed during the piling process and the soil around the pile at the concave arc will be seriously carried out during the pipe pulling process, which will affect the actual use effect.

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