沥青砂应力吸收层防治沥青路面荷载型反射裂缝的研究
发布时间：2019-01-03 14:45
【摘要】：反射裂缝是半刚性基层沥青路面产生开裂的主要原因之一,通过在沥青面层与半刚性基层之间设置一层低模量改性沥青混合料应力吸收层是一种可以有效缓解由半刚性基层裂缝而导致沥青路面产生反射开裂的方法。本文通过室内试验进行了沥青砂应力吸收层混合料的配合比设计,通过低温抗裂试验、高温稳定试验和水稳定性试验等常规路用性能试验验证了所设计的应力吸收层配合比具备良好的路用性能。设计反射裂缝室内模拟试验,以沥青面层开裂时的荷载作用次数为指标,分析设置应力吸收层后对结构受力的影响。通过改变应力吸收层厚度,建立抗裂比与应力吸收层厚度的关系,得出应力吸收层的合理厚度范围。最终针对沥青面层和应力吸收层厚度对沥青面层开裂次数的影响进行线性回归分析,建立室内模拟试验疲劳寿命模型。通过有限元软件模拟分析了在行车荷载作用下道路各结构层的力学响应,以主要结构层的厚度和弹性模量为分析变量,根据各结构层的受力状态,提出各结构层的合理厚度和弹性模量。
[Abstract]:Reflection crack is one of the main causes of cracking in semi-rigid base asphalt pavement. By setting a layer of low modulus modified asphalt mixture stress absorption layer between the asphalt surface layer and the semi-rigid base course, it is a method that can effectively alleviate the reflection cracking of asphalt pavement caused by the crack of semi-rigid base course. In this paper, the mixture ratio of asphalt sand stress absorption layer mixture is designed through laboratory test, and the low temperature crack resistance test is carried out. The conventional road performance tests such as high temperature stability test and water stability test show that the designed mix ratio of the stress absorption layer has good road performance. An indoor simulation test of reflection crack was designed. The influence of stress absorption layer on the structure was analyzed by taking the number of loads acting on the asphalt surface as the index. By changing the thickness of the stress absorption layer, the relationship between the crack resistance ratio and the thickness of the stress absorption layer is established, and the reasonable thickness range of the stress absorption layer is obtained. Finally, according to the influence of asphalt surface and stress absorption layer thickness on the cracking times of asphalt surface layer, the fatigue life model of indoor simulation test was established by linear regression analysis. The mechanical response of each structure layer under the action of driving load is simulated by finite element software. The thickness and elastic modulus of the main structure layer are taken as the analysis variables, and according to the stress state of each structure layer, The reasonable thickness and elastic modulus of each structural layer are presented.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.217
本文编号：2399523
[Abstract]:Reflection crack is one of the main causes of cracking in semi-rigid base asphalt pavement. By setting a layer of low modulus modified asphalt mixture stress absorption layer between the asphalt surface layer and the semi-rigid base course, it is a method that can effectively alleviate the reflection cracking of asphalt pavement caused by the crack of semi-rigid base course. In this paper, the mixture ratio of asphalt sand stress absorption layer mixture is designed through laboratory test, and the low temperature crack resistance test is carried out. The conventional road performance tests such as high temperature stability test and water stability test show that the designed mix ratio of the stress absorption layer has good road performance. An indoor simulation test of reflection crack was designed. The influence of stress absorption layer on the structure was analyzed by taking the number of loads acting on the asphalt surface as the index. By changing the thickness of the stress absorption layer, the relationship between the crack resistance ratio and the thickness of the stress absorption layer is established, and the reasonable thickness range of the stress absorption layer is obtained. Finally, according to the influence of asphalt surface and stress absorption layer thickness on the cracking times of asphalt surface layer, the fatigue life model of indoor simulation test was established by linear regression analysis. The mechanical response of each structure layer under the action of driving load is simulated by finite element software. The thickness and elastic modulus of the main structure layer are taken as the analysis variables, and according to the stress state of each structure layer, The reasonable thickness and elastic modulus of each structural layer are presented.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.217
【参考文献】
相关期刊论文 前7条
1 张文杰;王君;;应力吸收层防治沥青混凝土加铺层反射裂缝机理分析及应用[J];公路;2009年08期
2 刘广;黄桥连;关宏信;陈善祥;;改性沥青应力吸收层材料及结构性能试验比较[J];中外公路;2013年03期
3 黄明;黄卫东;李本亮;李彦伟;;基于疲劳性能的应力吸收层混合料设计指标[J];建筑材料学报;2014年01期
4 周燕;张凯;陈拴发;苑瑞星;;应力吸收层沥青混合料贯入试验研究[J];武汉理工大学学报;2011年08期
5 谭忆秋;石昆磊;朱峰;徐慧宁;;级配对应力吸收层沥青混合料性能的影响[J];长安大学学报(自然科学版);2009年02期
6 王鹏;李昆;黄卫东;;基于有限元方法的应力吸收层延缓反射裂缝分析[J];公路工程;2011年03期
7 李祖仲;陈拴发;廖卫东;陈华鑫;;改性沥青应力吸收层混合料低温抗裂性能评价[J];中国公路学报;2012年04期
相关博士学位论文 前1条
1 张鹏;高等级公路半刚性基层材料的抗裂性能研究[D];大连理工大学;2007年
相关硕士学位论文 前2条
1 李祖仲;应力吸收层沥青混合料路用性能研究[D];长安大学;2005年
2 李江卫;胶粉改性沥青应力吸收层防治沥青路面反射裂缝研究[D];北京交通大学;2010年
，本文编号：2399523
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2399523.html
