CAJ | 학술논문

基于长沙绕城高速公路路基的动力响应现场试验,让车辆荷载直接作用于路基上,运用光纤光栅元件对路基下多个测点进行测试.根据现场试验结果,结合数值计算模拟软件,分析了路基动应力随路基深度的衰减关系,认为标准轴载的动应力影响深度为3m左右.与此同时,还得到了不同车辆荷载在不同行驶速度的动应力的变化规律.创新性地提出了车辆荷载的正弦函数的修正模型.
기우장사요성고속공로로기적동력향응현장시험,양차량하재직접작용우로기상,운용광섬광책원건대로기하다개측점진행측시.근거현장시험결과,결합수치계산모의연건,분석료로기동응력수로기심도적쇠감관계,인위표준축재적동응력영향심도위3m좌우.여차동시,환득도료불동차량하재재불동행사속도적동응력적변화규률.창신성지제출료차량하재적정현함수적수정모형.
In the field test of Changsha ring expressway subgrade dynamic response,let vehicle load act directly on the roadbed and use the fiber grating element to test the multiple measuring points under the subgrade.According to the results of field test,combined with numerical simulation software and analyzing the attenuation relationship between subgrade dynamic stress and the subgrade depth,the influence depth of the dynamic stress of the standard axle load is about 3m.At the same time,we also obtain a variation of the dynamic stress of different vehicle load in the different speed.Furthermore,a correction model of sine function of vehicle load is put forward innovatively.