碎石化的旧水泥路面上水泥混凝土加铺层应力分析和开裂预估
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摘要
目前,我国有大量旧水泥混凝土路面已经接近或超过了其设计年限,在迅速发展的公路运输使用需求下,已出现或很快会出现大范围的破坏,必须改建或者大修。碎石化是一种旧水泥混凝土路面破碎处治技术,是对旧水泥混凝土路面大修或改造的重要手段,因其具有防反射裂缝效果好、施工速度快、对环境和交通影响小等优点而被广泛应用。但国内对碎石化技术的研究和应用还不是很成熟,因此需要针对国内具体情况,对碎石化技术及其加铺层结构做系统的研究,具有重要的理论价值和现实意义。
论文参考大量国内外关于碎石化结构层的模型,借鉴现有的湿度梯度和温度梯度研究方法,提出了将非线性温度分布转化为线性温度分布、将湿度梯度转化为温度梯度的计算方法。在此基础上,结合碎石化结构层,提出用模量表征碎石化不同结构层,通过ABAQUS有限元软件引入弹簧单元模拟接缝和路面板与路肩间的传荷能力,再根据冲罗公路试验段路面结构Ⅲ建立板底不脱空和脱空的仿真模型,分析了各参数对碎石化的旧水泥路上水泥混凝土加铺层结构应力的影响。考虑到水泥混凝土加铺层的厚度、脱空尺寸、碎石化层下部模量、接缝传荷系数和温度梯度的变化,给出了碎石化后旧水泥路上水泥混凝土加铺层在车辆荷载、湿度梯度和温度梯度综合作用下的应力分析诺谟图,并给出了查询设计案例和疲劳破坏预估程序。
根据碎石化的旧水泥路上水泥混凝土加铺层结构和荷载作用特点,借助路面断裂力学的应力强度因子理论和有限元仿真模型对碎石化技术是否对加铺水泥混凝土面层有减缓反射裂缝发生的效果做了研究,并对碎石化的旧水泥路上水泥混凝土加铺层断裂破坏机理进行了分析。根据试验路试验结果提出了多锤头碎石化施工工艺参数及施工流程,并结合试验和测试结果检验了路面结构力学模型,以更真实地反映路面结构应力的实际情况。
At present, a majority of Old Cement Concrete Pavement were closing to its designed life, even some of them were exceeded in China. According to the rapidly developing application demand of highway transportation, there have appeard widespread destruction need to be repaired. Rubblization is a treatment methods technique of old PCCP, which is an important way of overhaul or rebuilding. Because of its effect in anti-reflective cracking, rapid construction speed, little impact of environmental and traffic, it has been used widely. But the research and application of rubblization technology is not very mature, therefore we should research systemically of rubblization technology and its overlay structure according to the domestic specific conditions, which has important theoretical price and practical significance.
This article reference to a large number of rubblization structure model in domestic and international, take example by existing research methods of moisture and temperature gradient. Put forward the calculation method of translating nonlinear temperature distribution into linear temperature distribution, translating moisture gradient into temperature gradient. On this basis, combined with structural layer of rubblization, proposed the concept that using modulus token differents structural layer of rubblization. Introducing spring unit simulate joint and Load transfer ability between shoulder and pavement through the finite element software ABAQUS. Then establish simulation model of void or not under boards according to the pavement structureⅢof Chongluo highway test sections. Analyze the parameters influence of Cement Concrete overlay Structural stress in old cement road rubblization. Considering the changes of Cement Concrete overlay Structure's thickness, void size, the lower modulus of rubblization structure, load transfer coefficients of the joint and temperature gradient, the tress nomograms of Cement Concrete overlay Structural stress in old cement road rubblization under vehicle load, moisture gradient and temperature gradient design case and fatigue damage prediction procedure are given.
Based on Cement Concrete overlay Structure and load characteristics in old rubblization cement road, with the stress intensity factors theory of fracturemechanics and finite element simulation model to analyze rubblization technique which is or not useful to mitigate feflecting crack, and analyze cracking mechanism of Cement Concrete overlay Structure in old rubblization cement road. Put forward Multiple-Head Breaker rubblization construction process and parameters based on the test road testing results, combined with test and test results to calibrate mechanical model of pavement structure, reflecting the actual situation of pavement structure stress more real.
论文参考大量国内外关于碎石化结构层的模型,借鉴现有的湿度梯度和温度梯度研究方法,提出了将非线性温度分布转化为线性温度分布、将湿度梯度转化为温度梯度的计算方法。在此基础上,结合碎石化结构层,提出用模量表征碎石化不同结构层,通过ABAQUS有限元软件引入弹簧单元模拟接缝和路面板与路肩间的传荷能力,再根据冲罗公路试验段路面结构Ⅲ建立板底不脱空和脱空的仿真模型,分析了各参数对碎石化的旧水泥路上水泥混凝土加铺层结构应力的影响。考虑到水泥混凝土加铺层的厚度、脱空尺寸、碎石化层下部模量、接缝传荷系数和温度梯度的变化,给出了碎石化后旧水泥路上水泥混凝土加铺层在车辆荷载、湿度梯度和温度梯度综合作用下的应力分析诺谟图,并给出了查询设计案例和疲劳破坏预估程序。
根据碎石化的旧水泥路上水泥混凝土加铺层结构和荷载作用特点,借助路面断裂力学的应力强度因子理论和有限元仿真模型对碎石化技术是否对加铺水泥混凝土面层有减缓反射裂缝发生的效果做了研究,并对碎石化的旧水泥路上水泥混凝土加铺层断裂破坏机理进行了分析。根据试验路试验结果提出了多锤头碎石化施工工艺参数及施工流程,并结合试验和测试结果检验了路面结构力学模型,以更真实地反映路面结构应力的实际情况。
At present, a majority of Old Cement Concrete Pavement were closing to its designed life, even some of them were exceeded in China. According to the rapidly developing application demand of highway transportation, there have appeard widespread destruction need to be repaired. Rubblization is a treatment methods technique of old PCCP, which is an important way of overhaul or rebuilding. Because of its effect in anti-reflective cracking, rapid construction speed, little impact of environmental and traffic, it has been used widely. But the research and application of rubblization technology is not very mature, therefore we should research systemically of rubblization technology and its overlay structure according to the domestic specific conditions, which has important theoretical price and practical significance.
This article reference to a large number of rubblization structure model in domestic and international, take example by existing research methods of moisture and temperature gradient. Put forward the calculation method of translating nonlinear temperature distribution into linear temperature distribution, translating moisture gradient into temperature gradient. On this basis, combined with structural layer of rubblization, proposed the concept that using modulus token differents structural layer of rubblization. Introducing spring unit simulate joint and Load transfer ability between shoulder and pavement through the finite element software ABAQUS. Then establish simulation model of void or not under boards according to the pavement structureⅢof Chongluo highway test sections. Analyze the parameters influence of Cement Concrete overlay Structural stress in old cement road rubblization. Considering the changes of Cement Concrete overlay Structure's thickness, void size, the lower modulus of rubblization structure, load transfer coefficients of the joint and temperature gradient, the tress nomograms of Cement Concrete overlay Structural stress in old cement road rubblization under vehicle load, moisture gradient and temperature gradient design case and fatigue damage prediction procedure are given.
Based on Cement Concrete overlay Structure and load characteristics in old rubblization cement road, with the stress intensity factors theory of fracturemechanics and finite element simulation model to analyze rubblization technique which is or not useful to mitigate feflecting crack, and analyze cracking mechanism of Cement Concrete overlay Structure in old rubblization cement road. Put forward Multiple-Head Breaker rubblization construction process and parameters based on the test road testing results, combined with test and test results to calibrate mechanical model of pavement structure, reflecting the actual situation of pavement structure stress more real.
引文
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[19]元松.基于FWD的水泥混凝土路面结构动力响应特性分析[D].长沙：长沙理工大学,2004
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[2]李昶,张玉宏,张建.冲击压实与MHB类设备对水泥混凝土路面破碎效果的对比[J].公路交通科技,2004,(11)：17-19
[3]Arpad Horvath. Life-Cycle Environmental and Economic Asessment of Using Recycled Materials for Asphalt Pavement[J]. Technical Report, Department of Civil and Environmental Engineering, University of California,2003
[4]American Concrete Pavement Association. Rubblizing of Concrete Pavements:A Discussion of its Use[J]. Technical Information,Concrete Pavement Engineering and Research,1998
[5]John P. Donahue, P.E.. Missouri Guide for Pavement Rehabilitation, Research Investigation Ri00-008[J]. Development and Technology MoDOT,2002
[6]张玉宏.水泥混凝土路面碎石化综合技术研究[D].南京：东南大学,2006
[7]邓学均,陈容生.刚性路面设计[M].北京：人民交通出版社,1988
[8]Westergaard.H.M.. Analysis of stresses in concrete slabs caused by variations of temperature[J]. Public Roads,1927(5):54-60
[9]Bradbury.R.D.. Reinforced concrete pavements[M]. Washington, D.C.:Wire Reinforcement Institute,1938
[10]Ghosh.R.K.. Die Einwirkung der temperature auf betonstassen[M]. Berlin,1961
[11]X.P.Shi, T.F.Fwa, S.A.Tan. Wrapping Stresses in Concrete Pavements on Pasternak Foundation[J].,Journal of Transportation Engineering,1993,119(6)
[12]姚祖康.水泥混凝土路面的温度翘曲应力[J].同济大学学报,1981,9(3)：44-54
[13]严作人.刚性路面设计中非线性分布产生的内应力分析[J].华东公路,1985(1)：32-37
[14]高博,王秉纲.混凝土路面路面温度翘曲应力粘弹性和非线性分析[J].西安公路学院学报,1985,13(4)：31-35
[15]周虎鑫,陈容生,齐诚.考虑材料粘弹性特征的水泥混凝土双层道面温度翘曲应力的研究[J].土木工程学报,1998,31(4)：59-64
[16]黄立葵.水泥混凝土路面设计公式化研究[J].中南公路工程,1998,23(1)：1-3
[17]田波,姚祖康.承受特重车辆作用的水泥混凝土路面应力分析[J].中国公路学报, 2000,13(2)：16-19
[18]谈志明,姚祖康,田波.水泥混凝土路面的荷载应力分析[J].公路,2002(8)：15-18
[19]元松.基于FWD的水泥混凝土路面结构动力响应特性分析[D].长沙：长沙理工大学,2004
[20]蒋应军.重载交通水泥混凝土路面材料与结构研究[D].西安：长安大学,2005
[21]倪富健,唐伯明.车辆超越及超限对水泥混凝土路面使用的影响分析[J].华东公路,2002(5)：3-6
[22]张显安.水泥混凝土路面板下脱空状况的分析与评定[D].长沙：长沙理工大学,2004.6
[23]黄立葵,何慧斌,张迎春.水泥混凝土路面的水冲刷破坏[J].中南公路工程,2003,28(3)：18-22
[24]谈至明,姚祖康,刘伯莹.水泥混凝土路面的温度应力分析[J].公路,2002(8)：19-22
[25]周玉民,谈至明,刘伯莹.水泥混凝土路面脱空状态下的荷载应力[J].同济大学学报,2007,35(3)：341-345
[26]张擎.考虑冲刷脱空的水泥混凝土路面设计研究[D].西安：长安大学,2009
[27]ARA,Inc., ERES Division 505 West University Avenue Champaign, ILLinois 61820, Guide for Mechanistic-Empirical Design of New And Rehabilitated Pavement Structure. AppendixQQ:Structural Response Models For Rigid Pavements[Z].2003
[28]段红波.水泥混凝土路面温度应力面向对象的有限元分析[D].大连：大连理工大学,2000
[29]Lev Khazanovich, Olga I.SeleznevaH.Thomas Yu, Michael I.Darter. Development of Rapid Solutions for Prediction of Critical CRCP stress[R]. Wshington, D.C. Transportation Research Board 80th Annual Meeting,2001
[30]石亦平,周玉蓉.ABAQUS有限元分析实例详解[M].北京：机械工业出版社,2006
[31]王金昌,陈页开.ABAQVS在土木工程中的应用[M].浙江：浙江大学出版社,2006.
[32]DB37/T1160-2009,旧水泥混凝土路面碎石化技术规程[S].山东：山东省质量技术监督局,2009
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