承载板测土基回弹模量关键技术与新计算方法

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中国公路学报 ›› 2014, Vol. 27 ›› Issue (1) : 23-29.

道路工程

刘树堂¹，曹卫东¹，李英勇²，房建果²

作者信息 +

Key Technique and New Calculating Method for Resilient Modulus of Subgrade Measured by Bearing Plate

LIU Shu-tang¹, CAO Wei-dong¹, LI Ying-yong², FANG Jian-guo²

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摘要

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。

Abstract

In order to accurately determine the resilient modulus of subgrade measured by bearing plate, the key technique and principle problems such as grading influence quantity, modification of coordinate origin and calculation formula, which are involved in the measurement of resilient modulus of soil subgrade by bearing plate method, were analyzed. On this basis, a new calculation method for resilient modulus of subgrade was put forward. Based on the field test data of the subgrade at elastic deformation stage, the new method employed least square method to draw regression line, and took the intercept of the regression line in the deformation axis as the modification value of coordinate origin. The results indicate that the new proposed formula is related to the slope of regression line and can be employed directly to calculate modulus of resilience, unnecessary to consider the problem of modification again because this method has conducted the implicit modification of coordinate origin.

导出引用

刘树堂，曹卫东，李英勇，房建果. 承载板测土基回弹模量关键技术与新计算方法[J]. 中国公路学报, 2014, 27(1): 23-29

LIU Shu-tang, CAO Wei-dong, LI Ying-yong, FANG Jian-guo. Key Technique and New Calculating Method for Resilient Modulus of Subgrade Measured by Bearing Plate[J]. China Journal of Highway and Transport, 2014, 27(1): 23-29

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基金

山东省自然科学基金项目（ZR2013EEM028）；山东省交通科技攻关项目(2009Y11，2010Y19）

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收稿日期	出版日期
2013-03-21	2014-01-20
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2014-03-31

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