目前,国内外在利用弯沉仪鉴定旧路和用作加固设计方面已经取得了大量成果。然而用弯沉指标评定路面强度却还存在一些问题。例如面层板体性不同的路面,即使弯沉值相同,其路面结构内的应力应变状态也是不同的。 众所周知,除弯沉指标外,不少单位也进行了路面弯沉盆的测定。有的测横向弯沉曲线,也有测纵向弯沉影响线。后者多利用前进卸荷法,测出汽车驶离测点几个固定距 At present, a great deal of achievements have been made at home and abroad in the use of deflection meters to identify old roads and to reinforce designs. However, there are still some problems in assessing the road surface strength with the deflection indicator. For example, pavement body of different pavement, even if the same deflection value, the pavement structure of the stress-strain state is also different. As we all know, in addition to deflection indicators, many units also carried out the determination of pavement deflection basin. Some measured lateral deflection curve, but also measured vertical deflection affect the line. The latter make use of forward unloading method to measure the car to leave the measuring point a few fixed distance