承载板测土基回弹模量关键技术分析与新计算方法  

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

作　　者：刘树堂[1] 曹卫东[1] 李英勇 房建果 

机构地区：[1]山东大学土建与水利学院,山东济南250061 [2]山东省交通运输厅公路局,山东济南250002

出　　处：《中国公路学报》2014年第1期23-29,共7页China Journal of Highway and Transport

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)

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。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 li modification value ne, of and took the intercept of the regression line in the deformation axis as the coordinate origin. The related to the slope of regression line and results indicate that the can be employed directly resilience, unnecessary to consider the problem conducted the implicit modification of coordinate of modification again origin. new proposed formula is to calculate modulus of because this method has

关 键 词：道路工程 土基 最小二乘法 回弹模量 承载板法 

分 类 号：U416.1[交通运输工程—道路与铁道工程]