土基模量随季节变化对沥青路面设计的影响  

Influence of variation of soil base's modulus with season's changing on asphalt pavement design

作　　者：武红娟[1] 王选仓[1] 

机构地区：[1]长安大学公路学院

出　　处：《长安大学学报（自然科学版）》2008年第4期7-10,共4页Journal of Chang’an University(Natural Science Edition)

基　　金：国家西部交通建设科技项目(200131882594)

摘　　要：针对最不利季节土基强度值过低且不能真实反映不同季节土基强度变化的问题,引入等效回弹模量作为土基强度的设计值。根据东北地区粘性土、华北地区粘性土和西北地区黄土所测得土基回弹模量随季节的变化情况,得出不同地区的等效回弹模量值。通过对不同等级、不同轴载作用下沥青路面结构设计计算,分析了不同土基强度取值对路面结构层厚度的影响。结果表明：用等效回弹模量作为土基强度的设计值,土基设计强度提高了50%～60%,沥青路面结构层厚度平均减小10.4 cm。Because the soil base＇s intensity in the most disadvantage season is too low and it can not reflect the true intensity of soil in different seasons, the soil base＇s equivalent modulus of resilience is introduced as the design value of soil base＇s intensity. According to the different values of soil base＇s modulus of resilience on the northeastern region clay, North China clay and the northwest region loess in different seasons, the soil base＇s equivalent modulus of resilience can be deduced. Through the structure design of asphalt pavement under different highway grades and different axle loads, the impact of soil base＇s intensity on the thickness of the pavement structure is analyzed. The results show that when the equivalent soil base＇s modulus is taken as design value of soil base＇s intensity, the soil base＇s intensity can be increased from 50% to 60%, the thickness of asphalt pavement can be reduce 10.4 cm. 4 tabs, 9 refs.

关 键 词：道路工程 沥青路面 土基回弹模量 季节变化 

分 类 号：U416.217[交通运输工程—道路与铁道工程]