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为准确确定承载板法测定的土基回弹模量,对该试验方法涉及的分级影响量、坐标原点修正及计算公式等关键技术和原理问题进行了深入的理论分析,在此基础上提出了一种确定回弹模量的新计算方法。新方法基于路基弹性变形阶段的测试数据,利用最小二乘法建立回归直线,将回归直线在变形轴上的截距作为坐标原点的修正值。研究结果表明:所提出的新计算公式在形式上与回归直线的斜率有关,隐含了对坐标原点的修正,因而使用时无需再单独考虑修正问题,可直接用于计算回弹模量。
In order to accurately determine the modulus of elasticity of soil foundation measured by the bearing plate method, the key techniques and principles of the grading influencing quantity, coordinate origin correction and calculation formula involved in the test method are analyzed in depth. Based on this, A New Calculation Method to Determine the Resilience Modulus. The new method is based on the test data of the subgrade elastic deformation stage, establishes the regression line by the least square method, and takes the intercept of the regression line on the deformation axis as the correction value of the origin of the coordinate. The results show that the proposed new formula is related to the slope of the regression line in form and implies the correction of the origin of coordinates. Therefore, it is no longer necessary to consider the correction problem separately and can be directly used to calculate the springback modulus.