Analysis of Plastic Tube on Plastic Tube Cast-in-Place Concrete Pile

The main purpose of this study is to provide basis and reference for the economical and rational selection of tube types used in the Plastic Tube Cast-in-place Concrete Pile (TC pile). In order to economically and rationally select plastic tube and determine the control index of plastic tube, 5 calculation procedures are drown up and studied combining with the basic parameter of plastic tube and application. The optimization of waved tube shape is discussed. Research shows that the maximum stress of plastic tube occurs at the initial stage of steel pipe uplifting; it is optimal in the condition of same wall thickness that the ratio of wave height to space is 0.38; it is not appropriate to use circular wave tube or large-wave-angle tube but reasonable to use trapezoidal or curved wave tube; the selection of plastic tube in practical engineering has large relationship with pile spacing and geological situation; the displacement along the radial direction is small, which can be disregarded in actual project. The selection method, principle and control index of single-wall PVC plastic waved tube suitable for TC pile are proposed. The water injection technology and method to reduce project cost are obtained.