Fatigue property of lean concrete should be studied when the material is set as base course since it withstands the repeated actions of load stress and temperature stress 摘要贫混凝土用于路面基层时，由于受到荷载应力和温度应力的反复作用，需研究其疲劳特性。
Mechanics characteristic of lean concrete included strength & module , fatigue characteristic and shrinkage properties are studied and its pavement parameters are put forward 研究了贫混凝土的力学特性包括强度、模量、疲劳特性和收缩特性，并确定各相关的路用参数。
The concrete pavement with lean concrete base ( lcb ) is a suited kind of pavement structure for heavy and over - heavy traffic . because of its excellence , it has good future 贫混凝土基层混凝土路面是一种适用于承受重、超重交通的路面结构，由于其种种优点，具有很大的发展潜力。
First , the fatigue feature of lean concrete is studied by fatigue test in this paper . it is proved that lean concrete has better fatigue feature than semi - rigid materials 本文通过疲劳试验对贫混凝土的抗疲劳特性进行了研究，表明贫混凝土具有比常用的半刚性基层材料更加优良的疲劳性能。
Based on the present research productions , load stress and temperature stress of asphalt pavement with lean concrete base are additionally calculated and the influence of correlated factors is analyzed 在现有研究成果基础上，补充计算了贫混凝土基层沥青路面的荷载应力和温度应力，并分析了各因素的影响。
The existing methods of structure design of concrete pavement with lean concrete base are analyzed , proving that the equivalent stiffness method is proper for calculating load stress but not for thermal stress 对贫混凝土基层混凝土路面现有结构设计方法的应力计算进行了分析，发现等刚度法用于双层板路面的荷载应力计算是可行的，但用于温度应力计算会引起较大的误差。
And two types of fatigue equations are put forward . according to them the fatigue stress coefficient of lcb for the concrete pavement structure and the structure coefficient of tension strength of lcb for the asphalt pavement structure are developed 并提出了贫混凝土两种形式的疲劳方程，据此推导了混凝土路面结构贫混凝土基层的疲劳应力系数和沥青路面结构贫混凝土基层的抗弯拉强度结构系数。
By analyzing the indoor flexural fatigue tests of small beams , the paper concludes that the fatigue life of lean concrete follows the two - parameter weibull distribution , and establishes two types of fatigue equation under different stress level and equivalent stress level 通过分析室内小梁弯拉疲劳试验结果，得出贫混凝土的疲劳寿命服从双参数威布尔分布，据此建立了不同应力水平和等效应力水平下两种形式的疲劳方程。
The load stress and the thermal stress of concrete pavement with lean concrete base are analyzed by three - dimensional finite element method , and the practical formulas of load stress under different axle load models and of thermal stress are get by regression method 利用三维有限元方法对贫混凝土基层混凝土路面进行了荷载应力和温度应力的大量计算，通过回归，得出了贫混凝土基层混凝土路面荷载应力及温度应力实用计算公式。
According to the different thermal fields and the maximum thermal gradient , the thermal stress of lean concrete base with asphalt surface can be calculated through fem , and the formula of calculating thermal stress for lean concrete base with asphalt surface is also brought forward based on that 根据不同自然区划的温度场和最大温度梯度，得出贫混凝土基层沥青路面中的基层温度应力的有限元解，于此提出了基层温度应力的计算公式。
