| In recent years, with the development of civil engineering, pile foundation is playing a more and more important role. As a kind of piles, CFG pile construction is expanding constantly. Because of its high construction speed, low cost, CFG pile is widely used in civil engineering and treatment of foundation.Pile foundation mechanics analysis has made a lot of achievements, just like mathematical model, the numerical simulation method and experimental research. Most of the studies are pile foundation linear and nonlinear static analysis, but the research about pile dynamic analysis is less, especially CFG pile dynamics analysis. In this paper, the experimental study is based on the highway from Suihua to Yichun. Using ABAQUS finite element software, I studied CFG pile dynamic finite element analysis. Based on above, the main work I have been done as follows:(1) Understand the current situation and developing trend of CFG pile in domestic and foreign. The design principle of pile foundation was studied in special geological conditions;(2) Analyze dynamic analysis methods of the pile foundation in the permafrost regions, and study pile dynamic analysis method in the research of ABAQUS finite element software. Discuss the dynamic characteristics parameters such as pile dynamic equation, pile vibration frequency and vibration model. In addition, it also introduced some dynamic test methods about CFG pile, as a theoretical foundation;(3) Considering the geological condition and construction machinery vibration, the six test plans were formulated for CFG pile test and adjacent pile foundation. Using low strain method and other test methods to estimate the quality of CFG pile under all the influence factors;(4)Using ABAQUS software to create CFG pile frequency extraction model, stress wave passing simulation analysis model, mechanical vibration simulation analysis model. Through the finite element analysis of three models, contrast analysis the test data under field situation. |
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