水泥混凝土路面板角弯沉的测点偏移影响及修正

为了分析弯沉测量结果上的差异,以水泥混凝土路面常见的2种弯沉测试方法为例,分析了板角弯沉测试时测点偏移对弯沉测试结果的影响,引入了测点偏移影响系数的概念,建立了允许偏移范围内实测弯沉的修正方法。结果表明,测点偏移对弯沉测试结果影响非常显著;测点向板内侧偏移时,2种测试方法均可引入测点纵向和横向偏移影响系数用来修正实测弯沉值,影响系数与荷载向板内移动的距离以及地基板相对刚度半径有关。因此,可以将测点偏移情况下的弯沉测试值转换为标准测点位置的弯沉值,方便了实测数据的统计处理,拓展了弯沉测试方法的应用范围,提高了弯沉测试的效率。

Effect and Correction on Slab Corner Deflection of Cement Concrete Pavement due to Measurement Point Offset

In order to analyzing the difference resulting from measurement point offset in the course of deflection measurements,the effect of measurement point offset on the deflection results are discussed by using two general deflection measurements.A parameter named coefficient of measurement point offset are introduced,and a method of eliminating effect of deflection results are established.The result shows that the dominant effect caused by measurement point offset can be modified by the coefficient related to the offset and relative radius of elastic foundation slab.If the method is used into the disposal of original data,the results with load offset can be transfer to the results of standard load position through a simple operation.In this way,the method can be applied to a relative broad field,the measurement efficiency can be improved greatly.