A drilled extruded reinforced support-disk pile and its construction method

Abstract

The invention relates to a drilled extruded and reinforced support disk pile, which comprises a prefabricated pile point, a pile body with a constant section and a support disk body. The pile body with a constant section is composed of a longitudinal main reinforcement and a spiral stirrup. The end of the support plate body is located on the outer wall of the equal-section pile body, and the support plate body includes the upper inclined reinforcement of the support plate and the lower inclined reinforcement of the support plate, and the upper inclined reinforcement of the support plate and the lower inclined reinforcement of the support plate are connected at a certain angle. The invention solves the problem of distributing bars in the support plate body, ensures the shape and stability of the drilled wall and the reaming wall of the support plate through the elastic film, and solves the quality problems such as concrete inclusion of mud, and the pulling out of the elastic film and the concrete pouring Alternately, to avoid the adverse effect of the remaining elastic film on the pile side friction. The invention belongs to the field of pile foundation engineering, is suitable for the construction of cast-in-situ piles with extruded and expanded support plates, and has better applicability in soft soil, sandy soil and other strata where conventional methods are limited, and achieves better technical and economic benefits.

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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