动荷载作用下路基沉降规律试验研究

摘要

Taking the second -term engineering of Jing - Hua freeway as research object, laws of sub-grade settlement under dynamic loading through analyzing the engineering properties of subgrade - filling was studied by taking tests on the spot and laboratory experiments and simulating with the finite element software ANSYS. The test results show that the subgrade settlement is affected by both the speed and load cycles; the subgrade settlement decrease with the depth of subgrade increasing; the extremal point of subgrade settlement is below the cyclic loading and the maximum settlement is about 9.624 cm.%以京化高速公路二期工程为研究对象,采用现场测试、室内试验等方法对路基填料的工程特性进行分析,并借助非线性有限元分析软件ANSYS进行仿真模拟,研究动荷栽作用下路基沉降规律.结果表明,路基沉降受速度效应与加载循环效应双重因素的影响；沿深度方向路基的沉降呈减小的趋势；路基沉降量极值点位于循环荷载加载点正下方,最大沉降量约为9.624 cm.