Drilling pile forming construction method

Abstract

The invention relates to the field of bridge pile foundation construction, in particular to a bored pile forming construction method. The method comprises the following steps that a drilling machine is used for drilling holes, combined slurry conforming to a first index is input into the holes, and the combined slurry comprises polymer powder and colloidal bentonite; if the combined slurry in the hole meets the second index, drilling is continued, and after drilling is conducted to the designed depth, hole forming quality inspection is conducted; standing the combined slurry until suspended drilling slag in the slurry is fully precipitated to the bottom of the hole, and cleaning the bottom of the hole for the first time; and when the combined slurry after hole cleaning meets a third index, underwater concrete is poured into the hole. A small amount of bentonite is added into pure polymer slurry, so that a polymer-bentonite thin film layer is formed on a hole wall; the combined slurry reduces the side friction resistance influence on the interface of the bored pile wall and the pile side soil, effectively overcomes the defect that the pure polymer slurry is easy to run off from the bored hole wall in the easy-to-permeate stratum, and achieves the purposes of enhancing the wall protection effect and preventing the hole wall from collapsing.

Description

technical field [0001] The present application relates to the field of bored pile pile-forming technology, in particular to a bored pile pile-forming construction method. Background technique [0002] Bored piles are widely used in the field of construction engineering, especially in the construction of railways and highways. They can be designed into different pile lengths and diameters according to different strata and usage needs. Bored piles need to use drilling fluid to protect the wall. A large number of tests and engineering practices have shown that the construction drilling fluid directly affects the bearing capacity of the pile foundation to a large extent. In order to reduce the impact of drilling fluid wall protection on the side friction of bored piles, polymer slurry is used instead of traditional bentonite mud for wall protection during the construction of bored piles. A polymer is a long-chain compound formed by linking and polymerizing many monomeric high-m...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a pile-forming construction method of bored piles using "polymer-bentonite" mud wall protection in easily permeable strata, so as to solve the problem of good wall protection effect and reduce the impact on "drilled pile wall and pile side soil" in the related technology The problem that the impact of pile side friction on the interface cannot be taken into account at the same time

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