荷载模型对沥青路面路表弯沉计算的影响

弯沉作为我国沥青路面设计和竣工验收的重要指标之一,规范规定采用单轴单侧双圆均布荷载进行理论计算,而用贝克曼梁法实地量测时的标准车荷载为单轴双侧四圆荷载。文中采用1层状弹性理论计算结果表明二者差值达25%～45%,并进一步对双轴和三轴荷载模型下弯沉值的影响进行分析。

Effect of Load Model on Calculating the Asphlat Pavement Deflection

The deflection serves as one of important index of asphalt pavement design and completion test and the standards stipulate to use uniaxial unilateral two-round uniform load to calculate theoretically while uniaxial bilateral four-round uniform load was introduced when conducting field determination by using Benkelman beam method. Layered elastic theory was used and the calculating＇results showed the two difference reached 25 - 45 % and deflection values under the circmnstance of biaxial and triaxial models were analyzed further.