潮湿路段耐久性沥青路面支撑结构优化设计
|
摘要
路基和垫层及底基层构成了的路面支撑系统,其结构参数直接影响路面的受力状态及长期性能。由于高地下水位地段粉土路基经常处于潮湿状态,承载力较低,无法满足路基路面设计要求,有必要对路床进行固化处理,并与路面基层共同形成一个稳定坚固的支撑体系,因此,本文基于沥青路面的长期性能对潮湿路段的路面支撑结构进行了综合优化设计。
本文首先基于非饱和土理论并利用已有模型对高地下水位地段粉土路基含水量和路基回弹模量进行分析和预估。利用有限元分析建立了一般沥青路面和长寿命沥青路面土基顶面压应变与路表弯沉之问的相关关系,基于已有的弯沉-轴载累积作用次数的关系,建立土基顶面压应变-轴载累积作用次数关系(土基顶面压应变设计方程)。
本文利用有限元分析了路面支撑系统参数对一般沥青路面与长寿命沥青路面受力状态和长期性能的影响。分析了土基模量、底基层模量及厚度、路床处理层模量及厚度对沥青路面土基顶面压应变、路表弯沉、层底拉应力的影响规律。依据不同底基层厚度及模量,优化分析不同土基模量和路床处理层模量下路床处理层的最佳厚度。最后,结合底基层与路床处理层材料单价,利用有限元设计程序对潮湿路段沥青路面结构进行优化设计,确定潮湿路段经济性最佳的沥青路面支撑结构组合。
The structural parameters of pavement supporting system, composed by sub-grade, cushion and sub-base, have a direct influence on the stress condition and long-term performance of pavement. Because the high underground water table section silt sub-grade is always in moist condition, its poor bearing capacity can not satisfy the design requirement of sub-grade and pavement, the roadbed is necessarily to be consolidated to form a stable and strong supporting system with base layer. Therefore, based on the long-term performance of asphalt pavement, an integrated optimum design of pavement supporting structure in wet areas is proposed in this paper.
Firstly based on the theory of unsaturated soil, the moisture content and resilience modulus of high underground water table section silt sub-grade are analyzed and forecasted via given models. The correlationship between compressive strain on top.of sub-grade soil and pavement deflection of normal asphalt pavement and durable asphalt pavement is established by finite-element analysis, and also the relationship between compressive strain on top of sub-grade soil and cumulative equivalent axle loads (the relationship between soil base top pressure strain design equation) on the basis of given relationship.
The pavement supporting system parameters causing influence on stress condition and long term performance of normal asphalt pavement and long-life asphalt pavement is analyzed by finite-element method. And also analyze the influence on top roadbed compressed strain, the deflection on the surface and bottom layer tensile stress of asphalt pavement by sub-grade modulus, modulus and depth of sub-base and treated raodbed layer. The optimum thickness of treated roadbed layer is optimized in accordance with sub-base thickness and modulus under different conditions of sub-base and treated raodbed layer modulus. Finally, according to the reasonable modulus and the material prices of sub-base and treated roadbed layer, the optimum design of the asphalt pavement structure in wet areas is proceeded by finite element program, and then the most economical structure composition of asphalt pavement supporting is determined.
本文首先基于非饱和土理论并利用已有模型对高地下水位地段粉土路基含水量和路基回弹模量进行分析和预估。利用有限元分析建立了一般沥青路面和长寿命沥青路面土基顶面压应变与路表弯沉之问的相关关系,基于已有的弯沉-轴载累积作用次数的关系,建立土基顶面压应变-轴载累积作用次数关系(土基顶面压应变设计方程)。
本文利用有限元分析了路面支撑系统参数对一般沥青路面与长寿命沥青路面受力状态和长期性能的影响。分析了土基模量、底基层模量及厚度、路床处理层模量及厚度对沥青路面土基顶面压应变、路表弯沉、层底拉应力的影响规律。依据不同底基层厚度及模量,优化分析不同土基模量和路床处理层模量下路床处理层的最佳厚度。最后,结合底基层与路床处理层材料单价,利用有限元设计程序对潮湿路段沥青路面结构进行优化设计,确定潮湿路段经济性最佳的沥青路面支撑结构组合。
The structural parameters of pavement supporting system, composed by sub-grade, cushion and sub-base, have a direct influence on the stress condition and long-term performance of pavement. Because the high underground water table section silt sub-grade is always in moist condition, its poor bearing capacity can not satisfy the design requirement of sub-grade and pavement, the roadbed is necessarily to be consolidated to form a stable and strong supporting system with base layer. Therefore, based on the long-term performance of asphalt pavement, an integrated optimum design of pavement supporting structure in wet areas is proposed in this paper.
Firstly based on the theory of unsaturated soil, the moisture content and resilience modulus of high underground water table section silt sub-grade are analyzed and forecasted via given models. The correlationship between compressive strain on top.of sub-grade soil and pavement deflection of normal asphalt pavement and durable asphalt pavement is established by finite-element analysis, and also the relationship between compressive strain on top of sub-grade soil and cumulative equivalent axle loads (the relationship between soil base top pressure strain design equation) on the basis of given relationship.
The pavement supporting system parameters causing influence on stress condition and long term performance of normal asphalt pavement and long-life asphalt pavement is analyzed by finite-element method. And also analyze the influence on top roadbed compressed strain, the deflection on the surface and bottom layer tensile stress of asphalt pavement by sub-grade modulus, modulus and depth of sub-base and treated raodbed layer. The optimum thickness of treated roadbed layer is optimized in accordance with sub-base thickness and modulus under different conditions of sub-base and treated raodbed layer modulus. Finally, according to the reasonable modulus and the material prices of sub-base and treated roadbed layer, the optimum design of the asphalt pavement structure in wet areas is proceeded by finite element program, and then the most economical structure composition of asphalt pavement supporting is determined.
引文
[1]公路沥青路面设计规范.JTG D50-2006.人民交通出版社.2006
[2]李峰,孙立军,胡晓.长寿命沥青路面设计方法与实践综述[J].公路.2005
[3]林绣贤.柔性路面结构设计方法[M].人民交通出版社.1988
[4]《公路沥青路面设计规范》释义手册.人民交通出版社.2008
[5]粟弼国.重载交通长寿命沥青路面结构分析.[D].浙江大学.2008
[6]Asphalt Pavement Alliance. Perpetual Pavements. A Synthesis. Asphalt Pavement Alliance Order Number APA 2002
[7]Rafiqul A. Tarefder. Future Design of Perpetual Pavements:Issues and Options. ASCE. 2009
[8]Peng Cui, Lijun Sun, Li Zhang. Perpetual Pavements Design Criterions. International Conference on Transportation Engineering.2007
[9]谭炯.重载交通长寿命沥青路面结构及材料设计研究.[D].长沙理工大学.2008
[10]姚昱晨,葛折圣,熊明祥,石程华,黄晓明.半刚性基层沥青路面与全厚式沥青路面疲劳特性比较.[J].合肥工业大学学报.2002
[11]马庆雷.基于刚性基层的耐久性沥青路面结构研究.[D].长安大学.2006
[12]赵佳军.柔性路面优化设计方法研究[J].公路.1994
[13]沙庆林.高等级公路半刚性路面[M].北京：中国建筑工业出版社,1993.
[14]盛安连,伍石生.高等级公路沥青面层厚度优化设计[J].公路,1997
[15]黄立葵,王昌衡.优化方法在柔性路面厚度设计中的应用.[J].湖南大学学报.1993.6
[16]刘沐宇,汪劭袆.沥青路面结构优化方法的研究.[J].武汉理工大学学报.2002.4
[17]孙志军,戴经梁.沥青路面结构优化设计方法研究[J].西安公路交通大学学报.1997
[18]姚占春.上海半刚性基层沥青路面结构的设计优化[D].同济大学.1999
[19]邢文训,谢金星.现代优化算法[M].清华大学出版社,1999.
[20]黄文雄,谭利英,吴明威.基于遗传算法的沥青路面结构优化方法研究.长江大学学报.2006
[21]徐永福,刘松玉.非饱和土强度理论及工程应用.[M].东南大学出版社1999
[22]李聪,邓卫东,张盛.考虑非饱和土基质吸力影响的路基回弹模量研究.公路交通技术.2008
[23]兰伟,凌建明,官盛飞.非饱和粘性路基土回弹模量预估模型探讨[J].西部交通科技.2008
[24]杨树荣,拱祥生,黄伟庆,林宏达.非饱和粘性路基土回弹模量之研究.岩土工程学报.2006
[25]凌建明,谢经保,郑悦锋,杨戈基于地下水变位的路基顶面当量回弹模量预估[R].同济大学学报(自然科学版).2005
[26]Joseph R.Williams.Ying Ouyang. Estimation of Infiltration Rate in Vadose Zone: Application of Selected Mathematical Models [Z]. Washington:Washington Environmental Protection Agency,1998.
[27]Salem, Bayomy and Al-Taher. Prediction of Seasonal Variation of Subgrade Resilient Modulus Using LTPP Data.2003
[28]郑传超,王秉纲.道路结构力学计算[M].人民交通出版社.2003
[29]王峰.移动荷载作用下过湿地段路基路面动力响应有限元分析[D].长安大学.2009
[30]崔鹏,邵敏华,胡晓,孙立军.长寿命沥青路面结构组合的有限元分析[J].同济大学学报.2008
[31]姚祖康等.沥青路面设计指标体系
[32]张鹏.高速公路沥青路面二灰垫层研究[D].长安大学.2007
[33]陈晓燕.基于路基强度衰减条件下的路面结构力学分析及典型结构的推荐.[D].山东大学.2009
[34]时伟.土基回弹模量对沥青路面的影响及加固层设计研究.[D]长安大学.2007
[35]武红娟.土基回弹模量变化对路面设计的影响分析[D].长安大学.2005
[36]张云龙.长寿命沥青路面合理结构研究.[D].长安大学.2008
[37]李黎明.ANSYS有限元分析实用教程[M].清华大学出版社.2005
[38]小飒工作室编.最新经典ANSYS及Workbench教程[M].电子工业出版社.2004
[39]段进、倪栋、王国业.ANSYS结构分析从入门到精通[M].兵器工业出版社.2006
[40]田永军.基于ANSYS优化的巷道断面设计研究[D].天津大学.2007
[41]Saeed Moaveni著.欧阳宇,王崧等译.有限元分析—ANSYS理论与应用[M].电子工业出版社.2003
[42]康国政.大型有限元程序的原理、结构与使用[M].西南交通大学出版社.2004
[43]公路工程预算定额.JTG／T B06-02-2007.人民交通出版社.2007
[44]公路工程机械台班费用定额.JTG／T B06-02-2007.人民交通出版社.2007
[45]杨树荣.路基土壤之不饱和吸力特性及反复载重下之力学行为[D].国力中央大学.1994
[46]叶国铮.柔性路面疲劳与优化设计[M].北京：人民交通出版社,1989.
[47]Michael,S.Mamlouk.Analysis and Design Optimization of Flexible Pavement [J].Journal of Transportation Engineer-ing,2000(3/4)
[48]Michael Divinsky.Probabilistic Approach to Pavement Design Based on Generalized California Bearing Ratio Equation[J]. Journal of Transportation Engineering,1998(11/12)
[49]黄卫、钱振东著.高等沥青路面设计理论与方法[M].科学出版社.2001
[50]朱照宏、许志鸿编著.柔性路面设计理论与方法[M].同济大学出版社.1987
[51]韩伟.高地下水位地段固化路床与路面基层结构综合设计.[D].长安大学.2009
[52]陶全心,李著壕.结构优化设计方法[M].北京：清华大学出版社,1985.98-112.
[53]汪劭袆,基于遗传算法的沥青路面结构优化方法研究[D].
[54]D.G费雷德隆德,H.拉哈尔佐.著,陈仲颐,张在明等译.非饱和土土力学.[M].中国建筑工业出版社.1997
[55]W.N.Houston,H.B.Dye,C.E.Zapata,Y.Y.Perera,A.Harraz. Determination of SWCC using One Point Suction Measurement and Standard Curves.2006
[56]栾茂田,李顺群,杨庆.非饱和土的理论土—水特征曲线.[R]岩土工程学报.2005
[57]龚曙光,谢桂兰,ANSYS操作命令与参数化编程,北京：机械工业出版社,2004.4
[58]李旗号,张春来,谢峰,ANSYS软件中优化技术在CAE中的应用,制造业自动化,2003.25(9)：23～26
[59]Karanagh K,Clough R W. Finite element Application in the characterization of Elastic solids, Int.solids structures,1971 (7):11～13
[60]姚祖康.公路设计手册.路面(第三版)[M].人民交通出版社.2006
[2]李峰,孙立军,胡晓.长寿命沥青路面设计方法与实践综述[J].公路.2005
[3]林绣贤.柔性路面结构设计方法[M].人民交通出版社.1988
[4]《公路沥青路面设计规范》释义手册.人民交通出版社.2008
[5]粟弼国.重载交通长寿命沥青路面结构分析.[D].浙江大学.2008
[6]Asphalt Pavement Alliance. Perpetual Pavements. A Synthesis. Asphalt Pavement Alliance Order Number APA 2002
[7]Rafiqul A. Tarefder. Future Design of Perpetual Pavements:Issues and Options. ASCE. 2009
[8]Peng Cui, Lijun Sun, Li Zhang. Perpetual Pavements Design Criterions. International Conference on Transportation Engineering.2007
[9]谭炯.重载交通长寿命沥青路面结构及材料设计研究.[D].长沙理工大学.2008
[10]姚昱晨,葛折圣,熊明祥,石程华,黄晓明.半刚性基层沥青路面与全厚式沥青路面疲劳特性比较.[J].合肥工业大学学报.2002
[11]马庆雷.基于刚性基层的耐久性沥青路面结构研究.[D].长安大学.2006
[12]赵佳军.柔性路面优化设计方法研究[J].公路.1994
[13]沙庆林.高等级公路半刚性路面[M].北京：中国建筑工业出版社,1993.
[14]盛安连,伍石生.高等级公路沥青面层厚度优化设计[J].公路,1997
[15]黄立葵,王昌衡.优化方法在柔性路面厚度设计中的应用.[J].湖南大学学报.1993.6
[16]刘沐宇,汪劭袆.沥青路面结构优化方法的研究.[J].武汉理工大学学报.2002.4
[17]孙志军,戴经梁.沥青路面结构优化设计方法研究[J].西安公路交通大学学报.1997
[18]姚占春.上海半刚性基层沥青路面结构的设计优化[D].同济大学.1999
[19]邢文训,谢金星.现代优化算法[M].清华大学出版社,1999.
[20]黄文雄,谭利英,吴明威.基于遗传算法的沥青路面结构优化方法研究.长江大学学报.2006
[21]徐永福,刘松玉.非饱和土强度理论及工程应用.[M].东南大学出版社1999
[22]李聪,邓卫东,张盛.考虑非饱和土基质吸力影响的路基回弹模量研究.公路交通技术.2008
[23]兰伟,凌建明,官盛飞.非饱和粘性路基土回弹模量预估模型探讨[J].西部交通科技.2008
[24]杨树荣,拱祥生,黄伟庆,林宏达.非饱和粘性路基土回弹模量之研究.岩土工程学报.2006
[25]凌建明,谢经保,郑悦锋,杨戈基于地下水变位的路基顶面当量回弹模量预估[R].同济大学学报(自然科学版).2005
[26]Joseph R.Williams.Ying Ouyang. Estimation of Infiltration Rate in Vadose Zone: Application of Selected Mathematical Models [Z]. Washington:Washington Environmental Protection Agency,1998.
[27]Salem, Bayomy and Al-Taher. Prediction of Seasonal Variation of Subgrade Resilient Modulus Using LTPP Data.2003
[28]郑传超,王秉纲.道路结构力学计算[M].人民交通出版社.2003
[29]王峰.移动荷载作用下过湿地段路基路面动力响应有限元分析[D].长安大学.2009
[30]崔鹏,邵敏华,胡晓,孙立军.长寿命沥青路面结构组合的有限元分析[J].同济大学学报.2008
[31]姚祖康等.沥青路面设计指标体系
[32]张鹏.高速公路沥青路面二灰垫层研究[D].长安大学.2007
[33]陈晓燕.基于路基强度衰减条件下的路面结构力学分析及典型结构的推荐.[D].山东大学.2009
[34]时伟.土基回弹模量对沥青路面的影响及加固层设计研究.[D]长安大学.2007
[35]武红娟.土基回弹模量变化对路面设计的影响分析[D].长安大学.2005
[36]张云龙.长寿命沥青路面合理结构研究.[D].长安大学.2008
[37]李黎明.ANSYS有限元分析实用教程[M].清华大学出版社.2005
[38]小飒工作室编.最新经典ANSYS及Workbench教程[M].电子工业出版社.2004
[39]段进、倪栋、王国业.ANSYS结构分析从入门到精通[M].兵器工业出版社.2006
[40]田永军.基于ANSYS优化的巷道断面设计研究[D].天津大学.2007
[41]Saeed Moaveni著.欧阳宇,王崧等译.有限元分析—ANSYS理论与应用[M].电子工业出版社.2003
[42]康国政.大型有限元程序的原理、结构与使用[M].西南交通大学出版社.2004
[43]公路工程预算定额.JTG／T B06-02-2007.人民交通出版社.2007
[44]公路工程机械台班费用定额.JTG／T B06-02-2007.人民交通出版社.2007
[45]杨树荣.路基土壤之不饱和吸力特性及反复载重下之力学行为[D].国力中央大学.1994
[46]叶国铮.柔性路面疲劳与优化设计[M].北京：人民交通出版社,1989.
[47]Michael,S.Mamlouk.Analysis and Design Optimization of Flexible Pavement [J].Journal of Transportation Engineer-ing,2000(3/4)
[48]Michael Divinsky.Probabilistic Approach to Pavement Design Based on Generalized California Bearing Ratio Equation[J]. Journal of Transportation Engineering,1998(11/12)
[49]黄卫、钱振东著.高等沥青路面设计理论与方法[M].科学出版社.2001
[50]朱照宏、许志鸿编著.柔性路面设计理论与方法[M].同济大学出版社.1987
[51]韩伟.高地下水位地段固化路床与路面基层结构综合设计.[D].长安大学.2009
[52]陶全心,李著壕.结构优化设计方法[M].北京：清华大学出版社,1985.98-112.
[53]汪劭袆,基于遗传算法的沥青路面结构优化方法研究[D].
[54]D.G费雷德隆德,H.拉哈尔佐.著,陈仲颐,张在明等译.非饱和土土力学.[M].中国建筑工业出版社.1997
[55]W.N.Houston,H.B.Dye,C.E.Zapata,Y.Y.Perera,A.Harraz. Determination of SWCC using One Point Suction Measurement and Standard Curves.2006
[56]栾茂田,李顺群,杨庆.非饱和土的理论土—水特征曲线.[R]岩土工程学报.2005
[57]龚曙光,谢桂兰,ANSYS操作命令与参数化编程,北京：机械工业出版社,2004.4
[58]李旗号,张春来,谢峰,ANSYS软件中优化技术在CAE中的应用,制造业自动化,2003.25(9)：23～26
[59]Karanagh K,Clough R W. Finite element Application in the characterization of Elastic solids, Int.solids structures,1971 (7):11～13
[60]姚祖康.公路设计手册.路面(第三版)[M].人民交通出版社.2006