关键词: 静压桩, 压桩力, 单桩竖向抗压静载试验, 超静孔隙水压力, 线性回归方程

Abstract: In a project, 12 static pressedin square piles were selected for the sacrificial static pile loading testing, which provides a basis for the design of production piles. By calculating the characteristic values of the theoretical ultimate axial capacity of each single pile, and then converting them into the standard values (hereinafter referred to as theoretical values) and comparing them with the ultimate axial capacity of the single pile under the vertical compression (hereinafter referred to as test values), the relationship between the theoretical value and the experimental value and the ending pressure are analyzed by monitoring the peak value and the ending pressure. It is found that the end pressure of the pile with clay soil as bearing stratum is smaller than the test value, and the end pressure of the pile with sandy soil as bearing stratum is larger than the test value The experimental and theoretical values of the long pile foundation with clayey soil as bearing stratum accord with the linear regression equation of single variable and the fitting degree is high. Suggestions to guide the construction of the production piles are obtained by observing the stratum where the pile tip is located when the peak of pile pressure presented.

Key words: Static Pressed-in Piles, Pile Pressure, Static Axial Compressive Pile Loading Tests on Pingle Piles, Excess Pore Water Pressure, Linear Regression Equation