Method of constructing enlarged based composite foundation for stirring concrete filling pile

Abstract

The invention discloses a kind of construction method and its device of composite base of concrete filling pile enlarged base disturbing. It relates to the production method and the construction and device of the base. In the invention, the drilling tool is lifting with its circumrotation. The mixing head disturb the earth and cement slurry or cement mortar which comes from the spreading of the bottom hole and form composite base of concrete filling pile enlarged base disturbing. The slurry muzzle interconnected with the slurry channels is set under the drill pipe; the flex mixing head is set on the side of drill pipe. The construction method in the invention has advantages of easy construction technique, quick construction speed, and strong adaptability to the complex geology and many times increasing the under stress of individual pile. The construction device in the invention has advantages of easy structure, good disturbing effect, and no big noise and no pollution to the stratum and environment.

Description

Technical field: [0001] The invention relates to a construction method of concrete pouring pile bottom expansion and mixing composite foundation and construction equipment for bottom expansion and stirring composite foundation. Background technique: [0002] In the auger-drilled cast-in-place pile technology widely used at present, such as dry auger-drilled cast-in-place piles, drilled grouted piles, superfluid piles, CFG piles, pressed mortar piles, etc., the bottom of the piles generally cannot make full use of the soil. end bearing capacity. In order to solve this problem, many people are studying the composite foundation technology at the bottom of the pile, but most of these technologies adopt adding cushions at the bottom of the pile, such as gravel cushions, fiber cushions, etc., and compacting the pile bottom soil or The disadvantages of the above technologies are troublesome construction, high construction cost, poor ability to adapt to complex geological condition...

AI Technical Summary

Problems solved by technology

[0002] In the auger-drilled cast-in-place pile technology widely used at present, such as dry auger-drilled cast-in-place piles, drilled grouted piles, superfluid piles, CFG piles, pressed mortar piles, etc., the bottom of the piles generally cannot make full use of the soil. End bearing capacity

In order to solve this problem, many people are studying the composite foundation technology at the bottom of the pile, but most of these technologies adopt adding cushions at the bottom of the pile, such as gravel cushions, fiber cushions, etc., and compacting the pile bottom soil or High-pressure shotcrete reaming, etc. The disadvantages of the above technologies are troublesome construction, high construction cost, poor ability to adapt to complex geological conditions, and ultimately lead to low bearing capacity of piles

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