【作者】 王继林；

【导师】 王慧；

【作者基本信息】 合肥工业大学 ， 工程力学， 2004， 硕士

【摘要】 高速公路路面经历柔性路面和刚性路面，现在已向半刚性沥青路面快速发展。目前甚至有些低级路面也采用半刚性材料做基层。由于半刚性材料易于就地取材、工艺简单、强度和刚度好，造价又低，故这种刚柔结合的半刚性路面结构已形成一种普遍使用的形式。目前我国在高等级公路建设中大量使用半刚性沥青路面结构，但同时由于半刚性路面裂缝严重，容易导致路面反射裂缝破坏。这是因为半刚性基层材料对温度和湿度反应敏感。在环境和重复交通荷载作用下，基层容易产生干缩和低温缩裂裂，半刚性基层这些裂缝会扩展到面层，形成反射裂缝。 横向裂缝是半刚性沥青路面面层破坏主要形式，这种破坏主要由基层和面层温度收缩，干燥收缩和行车疲劳荷载作用产生的。本文特别针对温度和行车荷载两种情况下，讨论路面结构内力分布情况。方法是采用ansys对加设级配碎石基层半刚路面结构进行多种参数模拟计算，通过改变结构材料厚度、模量等观察基层和面层应力变化，研究碎石基层怎样调整结构应力而防止了温度和行车荷载产生的过大拉应力，避免基层产生内部裂缝。本文还研究了级配碎石路面各结构层的厚度、模量参数组合对于外界各类荷载承受能力，为路面结构方面设计提供一些参考数据。更多还原

【Abstract】 The high grade pavement has expericed three corse from flexible and rigid one to semi-rigidty quickly ,even some low grade pavement takes the semi-rigity material as its base. . Thanks to the semi-rigity material’s easy obtaining,simple technics,high rigity and intensity, but low pric,the semi-rigidity pavement has become a kind of main form in Chinese high grade pathway.. However, the pavement is easily spoiled by reflective cracking from semi-rigidity base Because semi-rigidity base is sensitivity to low temperature and little humidity , so through adverse circumstance and reduplicate vehicle load.the base can have easily rupture by much dryness and low temperature.Then these interior fractures will extend to exterior asphalt.Transverse fracture is a leading form of pavement’s breakage.lt may be made by structure’s temperature cracking .dryness cracking and traffic load. Here aiming at temperature and traffic load factors,have a systemic study about strcture’s stress distribution.Plan is to make use of ansys to calculate pavement structure’s distortion with full grade Gravelly Interlayer carefully through changing each layer’s thickness and module. Next, analysize stress among bottom of surface asphalt layer and top of semi-rigitidy base .Lastly.make a conclusion: how to distrube stress and strain about the structure after adding Gravelly Interlayer . In order to avoiding interior fracture,it is a crictical that base’s stress is below the material’s intensity limit.Basing on it.Make a possiblecombination about material’s thickness and module to predict it’s compacity to outside load . It can do some work for design of pavement structure.更多还原