路基贝克曼梁弯沉与FWD弯沉关系研究

Study on Conversion Relationship Between Dynamic and Static Deflection of Subgrade

依托广东某高速公路路基建设项目,分别进行了贝克曼梁和落锤式弯沉测试。首先采用直接回归法进行了回归分析,结果显示弯沉数据较离散,不函数下回归相关系数均较低,采用物理意义更加明确的幂函数形式,得到了动静弯沉直接转换关系式;然后采用代表值回归法进行回归分析,结果显示,数据相关性较高,采用幂函数形式得到了动静弯沉代表值转换关系式;最后分别对不同软基处置路段和填挖方式的数据进行了分析研究,结果表明,软基处置方式和路基填挖方式对弯沉转换关系影响不大。

In this study the Beckmann deflection and FWD deflection was tested respectively on the subgrade of one highway in Guangdong Province.First,the direct regression method is used.The results show that the deflection data are relatively discrete and the regression correlation coefficients are low using different functions.The power function with more clear physical meaning is used to obtain the direct conversion relationship between dynamic deflection and static deflection.Then the representative value regression method is used and the results show that the data are highly correlated.The power function is used to obtain the representative conversion relationship between dynamic deflection and static deflection.Finally,the data from different soft foundation disposal sections and excavation/filling section are analyzed.The results show that the soft foundation disposal and excavation/filling methods have little influence on the deflection conversion.