Analysis Of The Lateral Bearing Behavior Of The Prestressed Concrete Pipe Pile And Its Pile Extension Technique

The theoretical study of the Prestressed Concrete Pipe Pile is incapable of satisfying its increasing engineering application, especially on the analysis of the lateral force resistance performance when it functions horizontal load. In this paper, on the basis of the research achievements in the past, the author uses 3-dimensional finite element numerical calculation method to analyze the lateral force resistance performance of the Prestressed Concrete Pipe Pile. Furthermore, for the pipe pile is prefabricated and site splicing, the lateral force resistance performance of its joint parts affecting should be put into consideration. Contraposing the different pile extension technique's application and internal force characteristics of joint construction, the paper analyzes the lateral force resistance performance of the joint and its affect.The chief contents as following:(1) Based on the research of the mechanic performance of pile foundation and the present situation, the types and characteristics of the Prestressed Concrete Pipe Pile, etc., the paper treats the Prestressed Concrete Pipe Pile as the research objective and analyzes its lateral force resistance performance, pile extension technique is simultaneously put into consideration;(2) Based on the various calculation methods and the theory of the lateral loading pile, the lateral bearing behavior and destruction of single pile are analyzed;(3) To determine the test site, the construction engineering practice of Zhengzhou is taking for the Prestressed Concrete Pipe Pile static load test detection. According to the trial data, the vertical compressive bearing capacity and horizontal bearing capacity of single pile are analyzed and calculated. On that basis, capitalized on the theory of nonlinear finite element and pile-soil interaction theory, a three dimensional finite element mathematical model is developed to analyze the lateral force resistance performance of pipe pile based on the level of the numerical analysis by ANSYS software. In the model, different affecting factors are considered for the affects of pile displacement and bending moment, such as friction factors, elastic modulus, restriction to pile head and diameter and wall thickness;(4) Contraposing the different pile extension technique and the application and internal force characteristics of joint construction, the paper studies and analyzes the affecting factors and quality control of the joint and its affect, then pile extension technique which can improve the lateral force resistance performance of it is discussed.