不同模型下的FWD路面模量反算结果分析  

Analysis of Back-calculated Layer Moduli from FWD Tests Based on Different Models

作　　者：孙瑞华[1] 赵军[1] 

机构地区：[1]同济大学教育部道路和交通工程重点实验室,上海市200092

出　　处：《公路交通技术》2005年第2期32-35,共4页Technology of Highway and Transport

摘　　要：通过分析不同荷重等级下的FWD实测弯沉盆,进而比较了实测弯沉盆在反算过程中考虑土基非线性及动荷载因素时对路面各层反算模量的影响,得出三层路面结构的实测弯沉盆基于静力线弹性模型的模量反算结果会高估土基模量,低估基层模量,并解释了原因。FWD (Falling Weight Deflectometer) deflections under different loading levels are firstly analyzed, then the back-calculated layer moduli affected by FWD deflections are compared when the nonlinearity and dynamic factors of subgrade are considered in back-calculations. A conclusion is drawn that the subgrade modulus would be overestimated and the base modulus would be underestimated by the back-calculated layer moduli of FWD deflections of the three-layer pavement structures based on the static liner elastic model. The reasons are explained too.

关 键 词：模量反算 FWD 线弹性模型 弯沉盆 反算模量 土基模量 路面结构 基层模量 实测 动荷载 非线性 

分 类 号：U416.2[交通运输工程—道路与铁道工程] U416.216