设置土工合成材料防裂夹层的沥青加铺层应力分析  

Stress analysis of asphalt overlay with anti-cracking interlayer of geosynthetics

作　　者：杨斌[1] 陈拴发[2] 王秉纲[2] 

机构地区：[1]广西大学土木建筑工程学院,南宁530004 [2]长安大学特殊地区公路工程教育部重点实验室,西安710064

出　　处：《桂林工学院学报》2006年第3期358-361,共4页Journal of Guilin University of Technology

基　　金：广西自然科学基金资助项目(桂科青0447002);广西大学科研基金资助项目(X051002)

摘　　要：土工合成材料具有变形能力强、在水平方向上可承受较大拉应力的优点,将土工合成材料设置于旧水泥混凝土路面与沥青加铺层之间,用于减缓或防止沥青加铺层的反射裂缝.对土工合成材料防裂机理进行了分析,采用三维有限元方法分析了土工合成材料的拉伸模量对沥青加铺层的荷载应力、温度应力及耦合应力的影响程度.结果表明:土工合成材料拉伸模量越大,其对减少加铺层的各种应力的效果就越好;土工合成材料在减少加铺层温度应力方面的效果要比减小荷载应力的效果好.Geosynthetics have some advantages of large deformation ability and suffering tensional stress along horizontal direction. Therefore, geosynthetics can be installed between old concrete pavement and asphalt overlay to reduce or prevent reflective cracking in asphalt overlay. Mechanisms of anti-cracking of geosynthetics are analyzed. The 3-D finite element method is used to analyze the influence degree of tensional modulus of geosynthetics to loading stress, thermal stress and coupling stress in asphalt overlay. The results indicate that anti - cracking effect is better with the higher tensional modulus of geosynthetics, and the effect of reducing thermal stress of geosynthetics is better than that of reducing loading stress.

关 键 词：水泥混凝土路面 沥青加铺层 反射裂缝 土工合成材料 有限元法 

分 类 号：U416.01[交通运输工程—道路与铁道工程]