东南大学学报（自然科学版）2017，Vol.47Issue(6)：1227-1232,6.DOI:10.3969/j.issn.1001-0505.2017.06.023
基于虚拟惰性点的土基模量反演方法
Back-calculating method for subgrade modulus based on virtual inertial points
摘要
Abstract
To improve the back-calculating accuracy of subgrade modulus based on inertial points,the prediction method for the complete deflection basin based on a finite number of deflections was studied.The calculation method for virtual inertial points based on the predicted complete deflection basin curve was proposed.The results were compared with the back-calculated results for the realistic inertial points based on the realistic complete deflection basin curve.The theoretical analysis and the example verification for the back-calculating precision were carried out.The results show that,when the deflections within and outside the detection range are predicted by the logarithmic piecewise linear interpolation method and the exponential fitting model respectively,the prediction accuracy is high and the calculation is convenient.The average theory back-calculating errors for the realistic and virtual inertial point methods are 1.70％ and 1.53％,respectively.The position of the inertial point has a great influence on the back-calculating error.When the inertial point is outside the detection range,the average back-calculating errors for the realistic and virtual inertial point methods are 2.63％ and 1.45％,respectively.The results based on the measured deflection basin curves are in agreement with the simulation results.Through the improvement of the calculation of inertial point parameters,the virtual inertial point method significantly improves the back-calculation precision of the subgrade modulus.关键词
沥青路面/惰性点/弯沉盆曲线/落锤式弯沉仪/模量反演Key words
asphalt pavement/inertial point/deflection basin curve/falling weight deflectometer/modulus back-calculation分类
交通工程引用本文复制引用
臧国帅,孙立军,陈长..基于虚拟惰性点的土基模量反演方法[J].东南大学学报（自然科学版）,2017,47(6):1227-1232,6.基金项目
国家自然科学基金资助项目(51678443,71471134)、交通运输建设科技资助项目(2015318822170). （51678443,71471134）
