Design And Analysis Of CFA Pile Construction Tools

Screw displacement pile has many advantages, improve the ability of friction of pile,Minimizes the spoil, Compared with the traditional technology of bored piles at the samebearing capacity can reduce the use of concrete.In this paper, for the subsequent CFA pile construction tools design development to dothe research. The basic purpose of the article is to develop a CFA pile construction tools toimprove bearing capacity of pile, reduce material consumption and reduce the spoil, make theproduction costs and environmental impact minimized.Through the analysis of the construction process of screw drill pipe to overcome thetorque and vertical resistance, derivation of the drilling torque and the feed force calculationformula，provide a theoretical basis for the design of the CFA pile driving head and feedsystems. CFA pile bearing capacity as the prerequisite for the design parameters of screw drilltool were discussed，provide a reference for the design of screw drilling tool.Key technologies of CFA pile construction tools, the overall and the parts of CFA pileconstruction tools were introduced and the corresponding parts of the design. There is a clearadvantage of CFA pile, But in the drilling process and construction process also put forwardhigher requirements, in this paper, construction points to note and construction characteristicsdiscussed in detail. provide theoretical guidance for the future construction of a CFA pile rig.Finite element analysis of screw drilling tools，intensity, stability and natural frequencyof the screw drill tool have a very clear understanding，inferred screw drill tool damage mayoccur in the joint action of the material yield and buckling. CFA pile construction tools designimprovements to provide a theoretical basis.