Novel squeeze-expansion branch/plate forming device combined with post-grouting process and operation method thereof

Abstract

The invention provides a novel squeeze-expansion branch / plate forming device combined with a post-grouting process and an operation method thereof. The novel squeeze-expansion branch / plate forming device structurally comprises a steel reinforcement cage, the outer circumference of the steel reinforcement cage is sleeved by a plurality of transversely-arranged annular grouting pipes from top to bottom, and four one-way throttling grouting valves are evenly arranged on the annular grouting pipes. A plurality of spiral stirrups are arranged on the side wall of the steel reinforcement cage; a plurality of vertically-arranged main reinforcements which are connected with the spiral stirrups in a crossed mode are further evenly distributed on the side wall of the steel reinforcement cage, and a plurality of vertically-arranged galvanized grouting pipes which are fixed to the spiral stirrups and the main reinforcements are further evenly distributed on the side wall of the steel reinforcementcage, and the tops of the galvanized grouting pipes are higher than the top face of the steel reinforcement cage. Due to the design of the four one-way throttling grouting valves, grouting uniformitycan be guaranteed; a protruding slurry ladle stone body can be formed through the squeezing effect of pile side slurry and a soil body, under the combined action of the stone body and upper and lowerbranches / plates under a vertical load of a pile top, a good stress system is formed, the overall firmness and the bearing capacity of the whole branch / plate pile generated after grouting are greatly improved, and the influence of a soil body void area on the bearing capacity of a pile foundation can be greatly reduced.

Description

technical field [0001] The invention relates to a grouting structure, in particular to a novel extruded and expanded support disk forming device combined with post-grouting technology, which has simple and reliable structure, ingenious design, firmness and durability, and high strength. Background technique [0002] The existing extruded and expanded branch piles have limited bearing capacity. Due to the low shear strength of the soil between the supports, shear failure of the support and the bottom soil is prone to occur, and the side friction of some pile sections caused by the void area More losses. Contents of the invention [0003] In order to solve the above problems, the present invention provides a new extruded and expanded branch disk forming device combined with post-grouting technology, which has simple and reliable structure, ingenious design, strong durability and high strength. [0004] A novel extruded and expanded branch plate forming device combined with ...

AI Technical Summary

Problems solved by technology

[0002] The existing extruded and expanded branch piles have limited bearing capacity. Due to the low shear strength of the soil between the supports, shear failure of the support and the bottom soil is prone to occur, and the side friction of some pile sections caused by the void area more losses

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