Drilling pile with a bar-reinforced squeezed branch-plate, and construction method thereof

Abstract

The invention relates to a drilling pile with a bar-reinforced squeezing branch-plate. The pile comprises a precast pile tip, a uniform-section pile body and a branch-plate body; the uniform-section pile body is composed of a longitudinal main bar and spiral bars; the precast pile tip is placed at the end of the uniform-section pile body; the branch-plate body is positioned on the outer wall of the uniform-section pile body, and comprises a branch-plate upward-oblique bar and a branch-plate downward-oblique bar which are connected up at a certain angle. The invention solves the problem of laying bars in the branch-plate body, ensures the shape and stability of a drilled hole wall and the reamed hole wall of the branch-plate body, and solves the quality problem of soil-in-concrete by an elastic membrane, because alternating the operations of pulling out the elastic membrane and pouring the pile can avoid the adverse effect of the left elastic membrane to the pile side friction force. The invention belongs to the pile foundation engineering field, can be applied to the construction of cast-in-place pile with a squeezing expansion branch-plate, also has good applicability in the soil layers where the common methods are limited such as weak soil and sand, and can achieve good technical and economical effects.

Description

technical field [0001] The invention relates to a drilled extruded and reinforced abutment pile and a construction method thereof, which belong to the field of pile foundation engineering and are suitable for the construction of extruded and expanded abutment piles, and are especially suitable for soft soil foundations containing relatively hard sandy soil layers, viscous Pile driver construction under soil conditions. Background technique [0002] Squeeze-expanded branch-disc cast-in-situ pile is a pile type developed on the basis of multi-stage drilled and expanded pile technology. The appropriate soil layer is pressurized and expanded to form "branches" or "panels". At the same time, the surrounding soil is compacted and compacted to partially improve the physical characteristics and mechanical indicators of the foundation soil, effectively tap the potential of the foundation, and increase the number of single piles. The end-bearing area is changed from the original end-...

AI Technical Summary

Problems solved by technology

[0003] The extruded and expanded support plate piles constructed by conventional methods do not have any reinforcement in the extruded and expanded body. During the stress process of the pile foundation, the support plate bears a large shear force, and the shear resistance of plain concrete is weak, which is easy to cause The concrete of the support plate is damaged, which makes the setting of the support plate meaningless. At the same time, due to the instability of the hole wall, especially the debris on the expansion hole wall of the support plate is easy to collapse, and it is mixed into the concrete during pouring, further weakening the strength of the concrete

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