不同地区气温差异性对沥青路面结构设计的影响研究
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摘要
我国幅员辽阔,从南向北分处寒带、温带和热带,从西至东海拔相差4000m以上,因此各地区自然环境差异性较大。沥青路面结构作为一种暴露于自然界的构造物承受着自然环境和行车荷载作用的反复作用而出现损害。在夏季高温时,沥青路面常出现车辙、泛油及推移等病害,而在冬季寒冷地区则伴有裂缝现象的产生,春融期时则表现出土基强度下降及水损害等病害。因此,怎样防止这些病害的产生是我国目前急需解决的一个难题。
我国现行公路沥青路面设计规范采用15℃或20℃下沥青混凝土抗压回弹模量和劈裂强度作为路面材料的设计参数,半刚性材料则在规定龄期内测试其抗压回弹模量和劈裂强度。这些特定温度虽然考虑了路面结构受力的最不利状态,但仍难顾及到全国不同气温地区。
针对沥青路面不同地区气温差异性对路面结构强度和寿命的影响,选取9个不同地区,分别采用半刚性和柔性基层沥青路面,通过计算不同地区不同月份温度下沥青路表面弯沉和各结构层层底拉应力,并以拉应力计算各结构层疲劳寿命,来论证气温差异性对沥青路面结构设计的影响。本文主要研究工作有如下几点:针对沥青路面的工作性能,分析我国不同气候地区的气温差异性。
拟定典型沥青路面结构形式,通过道路结构温度场的计算,得到不同地区不同月份温度下沥青路面材料的设计参数。
以不同地区不同月份温度下的材料设计参数计算沥青路面的路表面弯沉和层底拉应力,分析其与现行沥青路面设计规范的差异性。
以不同地区不同月份下计算得到的各结构层层底拉应力对沥青路面的疲劳寿命进行预估,定量总结出气温对沥青路面结构设计的影响。
由于沥青混合料是一种粘弹性材料,温度对其路用性能有着重要的影响。本文通过不同温度下材料参数的确定来分月计算沥青路面的弯沉、层底拉应力及疲劳寿命,分析论证温度对沥青路面的影响。
本文所做研究工作将为我国沥青路面结构设计和规范的修订提供参考和借鉴。
China enjoys vast territory. There can be seen the frigid, temperate and tropical zone from the north to the south, and 4000 meters altitude gap from the east to the west. Therefore, the natural environmental differences are prominent in different parts of China .The asphalt pavement, as a structure exposed to nature and shouldering the double effects of natural conditions and the pressure of vehicles, is damaged to some extent. In hot days at while in cold winter, it is suffering from rutting,flushing at while cracking. In the welting periods of spring, it’s often damaged because of the instability of earth subgrade and water erosion. So avoiding these damages is a difficult problem and our top priority now.
The current specifications for design of highway asphalt pavement in China adopt the asphalt-concrete compression rebound modulus and cleavage strength of 15℃and 20℃as the designing parameters.These given temperatures are taken into consideration in the construction asphalt pavements, but it is hard to cover all the temperature zones in the whole country.
With the asphalt pavement influence of the temperature difference in different areas on the intensity and lifespan of pavement, the author, choosing semi-rigid type base and flexible base in 9 areas to be the study objects, discourses upon the influence of different temperature on the structural design of asphalt pavement by calculating the surface deflection and the base bed’s tensile stress of asphalt pavement in different times and places, and thus measuring the fatigue life of each structural, this paper focuses on the following points.
Tt was analied the temperature difference in different climate zones of China.
Tt was produced the designing parameters for the construction materials under the condition of different temperatures in different months.
It was calculated the deflection on the surface of asphalt pavement, bottom layer tensile stress and analied the differences in the standard of pavement designing. The forecast of the lifespan was conducted according to the tested tensional stress in different months of various areas, quantificationally summarizing the influence of temperature on the pavement structure design.
Because the asphalt mixture is one type of viscous-elastic material, temperature exerts grave impact on the asphalt pavements. This study is attempted to calculate the deflection on the surface, the semi-rigid base and the fatigue lifespan of the asphalt pavements. According to the material parameters in different temperature, it is concluded with the influence of temperature on asphalt pavement.
This study is hopeful to provide suggestion and implications for the design of the asphalt pavement structure and the standard modification.
我国现行公路沥青路面设计规范采用15℃或20℃下沥青混凝土抗压回弹模量和劈裂强度作为路面材料的设计参数,半刚性材料则在规定龄期内测试其抗压回弹模量和劈裂强度。这些特定温度虽然考虑了路面结构受力的最不利状态,但仍难顾及到全国不同气温地区。
针对沥青路面不同地区气温差异性对路面结构强度和寿命的影响,选取9个不同地区,分别采用半刚性和柔性基层沥青路面,通过计算不同地区不同月份温度下沥青路表面弯沉和各结构层层底拉应力,并以拉应力计算各结构层疲劳寿命,来论证气温差异性对沥青路面结构设计的影响。本文主要研究工作有如下几点:针对沥青路面的工作性能,分析我国不同气候地区的气温差异性。
拟定典型沥青路面结构形式,通过道路结构温度场的计算,得到不同地区不同月份温度下沥青路面材料的设计参数。
以不同地区不同月份温度下的材料设计参数计算沥青路面的路表面弯沉和层底拉应力,分析其与现行沥青路面设计规范的差异性。
以不同地区不同月份下计算得到的各结构层层底拉应力对沥青路面的疲劳寿命进行预估,定量总结出气温对沥青路面结构设计的影响。
由于沥青混合料是一种粘弹性材料,温度对其路用性能有着重要的影响。本文通过不同温度下材料参数的确定来分月计算沥青路面的弯沉、层底拉应力及疲劳寿命,分析论证温度对沥青路面的影响。
本文所做研究工作将为我国沥青路面结构设计和规范的修订提供参考和借鉴。
China enjoys vast territory. There can be seen the frigid, temperate and tropical zone from the north to the south, and 4000 meters altitude gap from the east to the west. Therefore, the natural environmental differences are prominent in different parts of China .The asphalt pavement, as a structure exposed to nature and shouldering the double effects of natural conditions and the pressure of vehicles, is damaged to some extent. In hot days at while in cold winter, it is suffering from rutting,flushing at while cracking. In the welting periods of spring, it’s often damaged because of the instability of earth subgrade and water erosion. So avoiding these damages is a difficult problem and our top priority now.
The current specifications for design of highway asphalt pavement in China adopt the asphalt-concrete compression rebound modulus and cleavage strength of 15℃and 20℃as the designing parameters.These given temperatures are taken into consideration in the construction asphalt pavements, but it is hard to cover all the temperature zones in the whole country.
With the asphalt pavement influence of the temperature difference in different areas on the intensity and lifespan of pavement, the author, choosing semi-rigid type base and flexible base in 9 areas to be the study objects, discourses upon the influence of different temperature on the structural design of asphalt pavement by calculating the surface deflection and the base bed’s tensile stress of asphalt pavement in different times and places, and thus measuring the fatigue life of each structural, this paper focuses on the following points.
Tt was analied the temperature difference in different climate zones of China.
Tt was produced the designing parameters for the construction materials under the condition of different temperatures in different months.
It was calculated the deflection on the surface of asphalt pavement, bottom layer tensile stress and analied the differences in the standard of pavement designing. The forecast of the lifespan was conducted according to the tested tensional stress in different months of various areas, quantificationally summarizing the influence of temperature on the pavement structure design.
Because the asphalt mixture is one type of viscous-elastic material, temperature exerts grave impact on the asphalt pavements. This study is attempted to calculate the deflection on the surface, the semi-rigid base and the fatigue lifespan of the asphalt pavements. According to the material parameters in different temperature, it is concluded with the influence of temperature on asphalt pavement.
This study is hopeful to provide suggestion and implications for the design of the asphalt pavement structure and the standard modification.
引文
[1]孟斯硕.十二五交通建设坚持适度超前高速公路里程将超越美国[EB/OL]. (2010-12-29)[2011-04-11]. http://finance.stockstar.com/MS2010122930000247.sh tml.
[2]刘万礼,李亚楠.我国高速公路沥青路面厚度现状调查分析[J].黑龙江科技信息,2009,(08):226+163.
[3]中交公路规划设计院.公路沥青路面设计规范:JTJ D50-2006[M].北京:人民交通出版社,2006:33-34.
[4]沈金安.沥青及沥青混合料路用性能[M].北京:人民交通出版社,2001:263.
[5]姚祖康.对国外沥青路面设计指标的评述(连载一)[J].公路,2003,(03):18-25.
[6]盛灿花.路面平整度特性研究[D].长沙:湖南大学学位论文,2005:57-58.
[7]近藤佳宏.日本土木工程学会论文报告集[C].同济大学道路与交通研究所.1976.
[8]秋山政敬.日本土木工程学会论文报告集[C].同济大学道路与交通研究所.1976.
[9] Christison, J.M., K.O.Allderson. The ResPonse of AsPhalt Pavements to Low Temperature Climatie Environments[C].Proeeeding of the 3rd International Conference on the Struetural Design of Asphal tPavements,1972.
[10]Lytton,R.L.,et al. An Integrated Model of the Climatic Effeets on Pavements[C]. Texas Transportation histitute, Texas A&M University,Final Report,1990.
[11]Huber,G.A. Weather Database for the SUPERPAVE Mix Design System.Strategie Highway Research Program,SHRP-A-648A,National Research Couneil,Washington DC,1994.
[12]孙立军.沥青路面结构行为理论[M].上海:同济大学出版社,2003.04
[13]秦健.沥青路面温度场的分布规律[J].公路交通科技.2006,23(8):18.
[14]姚祖康.水泥路面设计[M].合肥:安徽科学技术出版社,1999.
[15]Barber, E.S. Calculation of Maximum Pavement Temperatures from Weather RePorts[J]. Highway Researeh Board, Bulletin168, National Researeh Council, Washington DC,1957.
[16]严作人.层状路面体系的温度场分析[J].同济大学学报,1984,(03):76-85.
[17]吴赣昌.半刚性基层沥青路面温度场的解析理论[J].应用数学和力学,1997,(02):169-176
[18]陈凤鸣.高速公路半刚性基层病害处理技术研究[D].济南:山东大学学位论文,2010:4-7.
[19]曲岩,金巍.辽宁夏季气温降水气候分区研究[J].辽宁气象,2004,4:4-5
[20]刘黎明,陈创买.广东的气候分区[J].热带气象学报,1998,2:47-53
[21]张蓉.四川省沥青及沥青混合料路用性能气候分区的研究[J].西南公路,2005,1:20-28
[22]孟岩.河北省沥青路面气候影响分区与路面材料性能研究[D].石家庄:河北工业大学学位论文,2004:6-7.
[23]邹凤玲.中国气象科学数据共享服务网[EB/OL].(2005-04-25)[2011-04-20]. http://cdc.cma.gov.cn/
[24]中国科学院地理科学与资源研究所.人地系统主题数据库[EB/OL](.2005-04-25 )[2011-04-20]. http://www.data.ac.cn/index.asp.
[25]吉林省交通厅.公路工程抗冻设计与施工技术指南[M].北京:人民交通出版社,2006:08-13.
[26]周谦.基于气候交通特点的沥青路面结构研究[D].西安:长安大学学位论文,2008:140-144.
[27]马健.河南省二级公路柔性路面典型结构[J].公路,2004,(03):19-23.
[28]查旭东.基于同伦方法的路面模量反算的研究[D].西安:长安大学学位论文,2001:71-77.
[29]李静.沥青混合料温度稳定性与路面设计[D].西安:长安大学学位论文,2001:16-19.
[30]吴堂林,李燕枫,包秀宁,白淑毅.劈裂强度与马歇尔稳定度的温度函数分析[J].交通标准化,2007,(12):80-83.
[31]黄旭.高性能花岗岩沥青混凝土的制备与应用研究[D].武汉:武汉理工大学学位论文,2010:37-40.
[32]王国忠.高寒地区沥青稳定碎石基层柔性路面适应性研究[D].南京:南京林业大学学位论文,2006:34-35.
[33]王新友.沥青路面强度变化规律及养护[M].郑州:黄河水利出版社,2004.
[34]许志鸿,杨孟余.路面材料设计参数研究报告[R].上海:同济大学道路与交通工程研究所,1994.
[35]武红娟.土基回弹模量变化对路面设计的影响分析[D].西安:长安大学学位论文,2005:81-82
[36]交通部公路科学研究院.公路路基路面现场测试规程:JTG E60-008[M].北京:人民交通出版社.2008:55-57
[37]靳杰.沥青路面回弹弯沉温度修正方法探讨[J].广东公路交通,2009,(03):15-19
[38]交通部公路科学研究院上海市公路管理处.公路技术状况评定标准[M].北京:人民交通出版社,2007:26.
[39]王秀芳.沥青路面设计指标研究[D].西安:长安大学学位论文,2007:15-18.
[40]朱洪洲.柔性基层沥青路面疲劳性能及设计方法研究[D].南京:东南大学学位论文,2005:79.
[41]徐灏.疲劳强度设计[M].北京:机械工业出版社,1981.
[42]Miner M A.Cumulative Damage in Fatigue[J].Journal of Applied Mechanics,1945 (12)
[43]李静.沥青混合料温度稳定性与路面设计[D].西安:长安大学学位论文,2001:19-23.
[2]刘万礼,李亚楠.我国高速公路沥青路面厚度现状调查分析[J].黑龙江科技信息,2009,(08):226+163.
[3]中交公路规划设计院.公路沥青路面设计规范:JTJ D50-2006[M].北京:人民交通出版社,2006:33-34.
[4]沈金安.沥青及沥青混合料路用性能[M].北京:人民交通出版社,2001:263.
[5]姚祖康.对国外沥青路面设计指标的评述(连载一)[J].公路,2003,(03):18-25.
[6]盛灿花.路面平整度特性研究[D].长沙:湖南大学学位论文,2005:57-58.
[7]近藤佳宏.日本土木工程学会论文报告集[C].同济大学道路与交通研究所.1976.
[8]秋山政敬.日本土木工程学会论文报告集[C].同济大学道路与交通研究所.1976.
[9] Christison, J.M., K.O.Allderson. The ResPonse of AsPhalt Pavements to Low Temperature Climatie Environments[C].Proeeeding of the 3rd International Conference on the Struetural Design of Asphal tPavements,1972.
[10]Lytton,R.L.,et al. An Integrated Model of the Climatic Effeets on Pavements[C]. Texas Transportation histitute, Texas A&M University,Final Report,1990.
[11]Huber,G.A. Weather Database for the SUPERPAVE Mix Design System.Strategie Highway Research Program,SHRP-A-648A,National Research Couneil,Washington DC,1994.
[12]孙立军.沥青路面结构行为理论[M].上海:同济大学出版社,2003.04
[13]秦健.沥青路面温度场的分布规律[J].公路交通科技.2006,23(8):18.
[14]姚祖康.水泥路面设计[M].合肥:安徽科学技术出版社,1999.
[15]Barber, E.S. Calculation of Maximum Pavement Temperatures from Weather RePorts[J]. Highway Researeh Board, Bulletin168, National Researeh Council, Washington DC,1957.
[16]严作人.层状路面体系的温度场分析[J].同济大学学报,1984,(03):76-85.
[17]吴赣昌.半刚性基层沥青路面温度场的解析理论[J].应用数学和力学,1997,(02):169-176
[18]陈凤鸣.高速公路半刚性基层病害处理技术研究[D].济南:山东大学学位论文,2010:4-7.
[19]曲岩,金巍.辽宁夏季气温降水气候分区研究[J].辽宁气象,2004,4:4-5
[20]刘黎明,陈创买.广东的气候分区[J].热带气象学报,1998,2:47-53
[21]张蓉.四川省沥青及沥青混合料路用性能气候分区的研究[J].西南公路,2005,1:20-28
[22]孟岩.河北省沥青路面气候影响分区与路面材料性能研究[D].石家庄:河北工业大学学位论文,2004:6-7.
[23]邹凤玲.中国气象科学数据共享服务网[EB/OL].(2005-04-25)[2011-04-20]. http://cdc.cma.gov.cn/
[24]中国科学院地理科学与资源研究所.人地系统主题数据库[EB/OL](.2005-04-25 )[2011-04-20]. http://www.data.ac.cn/index.asp.
[25]吉林省交通厅.公路工程抗冻设计与施工技术指南[M].北京:人民交通出版社,2006:08-13.
[26]周谦.基于气候交通特点的沥青路面结构研究[D].西安:长安大学学位论文,2008:140-144.
[27]马健.河南省二级公路柔性路面典型结构[J].公路,2004,(03):19-23.
[28]查旭东.基于同伦方法的路面模量反算的研究[D].西安:长安大学学位论文,2001:71-77.
[29]李静.沥青混合料温度稳定性与路面设计[D].西安:长安大学学位论文,2001:16-19.
[30]吴堂林,李燕枫,包秀宁,白淑毅.劈裂强度与马歇尔稳定度的温度函数分析[J].交通标准化,2007,(12):80-83.
[31]黄旭.高性能花岗岩沥青混凝土的制备与应用研究[D].武汉:武汉理工大学学位论文,2010:37-40.
[32]王国忠.高寒地区沥青稳定碎石基层柔性路面适应性研究[D].南京:南京林业大学学位论文,2006:34-35.
[33]王新友.沥青路面强度变化规律及养护[M].郑州:黄河水利出版社,2004.
[34]许志鸿,杨孟余.路面材料设计参数研究报告[R].上海:同济大学道路与交通工程研究所,1994.
[35]武红娟.土基回弹模量变化对路面设计的影响分析[D].西安:长安大学学位论文,2005:81-82
[36]交通部公路科学研究院.公路路基路面现场测试规程:JTG E60-008[M].北京:人民交通出版社.2008:55-57
[37]靳杰.沥青路面回弹弯沉温度修正方法探讨[J].广东公路交通,2009,(03):15-19
[38]交通部公路科学研究院上海市公路管理处.公路技术状况评定标准[M].北京:人民交通出版社,2007:26.
[39]王秀芳.沥青路面设计指标研究[D].西安:长安大学学位论文,2007:15-18.
[40]朱洪洲.柔性基层沥青路面疲劳性能及设计方法研究[D].南京:东南大学学位论文,2005:79.
[41]徐灏.疲劳强度设计[M].北京:机械工业出版社,1981.
[42]Miner M A.Cumulative Damage in Fatigue[J].Journal of Applied Mechanics,1945 (12)
[43]李静.沥青混合料温度稳定性与路面设计[D].西安:长安大学学位论文,2001:19-23.