级配碎石基层材料的研究
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摘要
级配碎石基层是由无粘结力的散粒体材料经碾压形成,它常存在强度较低和永久变形较大的缺点,由此导致路面易产生疲劳裂缝。本研究针对传统柔性基层的以上缺点,依托高等级公路沥青路面柔性基层的研究项目,开展了级配碎石的级配优化组合设计与施工工艺合理组合的相关研究。
本研究采用振动成型工艺,评价方法除采用古典的CBR试验方法外,本文引入了重复加载的动力CBR试验方法,研究振动成型下级配组成对混合料的力学性能的影响。根据骨架提供强度,细集料抵抗永久变形的原则,研究了振动成型下粗、细集料的最佳级配,修筑了试验路,进行了施工工艺研究及现场回弹模量的测定与分析。
研究结果表明采用适当的级配组合和施工工艺,级配碎石基层的回弹模量可提高到400～450Mpa。
Although semi-rigid base has been applied broadly, for the increasement of traffic and the development of heavy traffic, it has two disadvantages: one is the heavy crosswise shrink crack; the other is the bad structure draining condition. Many projects have proved that these two disadvantages lead to early damage of bituminous pavement. This article bring forward using graded aggregate as the middle layer of bituminous layer and semi-rigid base to solve the two disadvantages. We choose it because graded aggregate can absorb and weaken the stress and strain of crack tip of semi-rigid base to prevent the reflection cracks from occurring and it has good drain performance.
Graded aggregate soft base comes from rolling on the incompact material with low felt, so the use of graded aggregate has the disadvantages of large permanent deformation and low modulus of resilient. How to solve the disadvantages of graded aggregate through the design of grading and sound moulding technics is the stress of this article. We use vibrant moulding technics to meet the requirement that moulding reflects modern machine. Besides using classic CBR experimentation as a appraise method, we introduce repeated load MTS experimentation, it can separate elasticity and permanent deformation, it can let us analyse the deformation characteristic of graded aggregate. These two appraise methods supplement each other, analyse questions from different point of view.
Chapter five is concluding and suggestion. Not only put forward the production of this study, but also bring forward the studying content and direction which we would continue to do.
本研究采用振动成型工艺,评价方法除采用古典的CBR试验方法外,本文引入了重复加载的动力CBR试验方法,研究振动成型下级配组成对混合料的力学性能的影响。根据骨架提供强度,细集料抵抗永久变形的原则,研究了振动成型下粗、细集料的最佳级配,修筑了试验路,进行了施工工艺研究及现场回弹模量的测定与分析。
研究结果表明采用适当的级配组合和施工工艺,级配碎石基层的回弹模量可提高到400～450Mpa。
Although semi-rigid base has been applied broadly, for the increasement of traffic and the development of heavy traffic, it has two disadvantages: one is the heavy crosswise shrink crack; the other is the bad structure draining condition. Many projects have proved that these two disadvantages lead to early damage of bituminous pavement. This article bring forward using graded aggregate as the middle layer of bituminous layer and semi-rigid base to solve the two disadvantages. We choose it because graded aggregate can absorb and weaken the stress and strain of crack tip of semi-rigid base to prevent the reflection cracks from occurring and it has good drain performance.
Graded aggregate soft base comes from rolling on the incompact material with low felt, so the use of graded aggregate has the disadvantages of large permanent deformation and low modulus of resilient. How to solve the disadvantages of graded aggregate through the design of grading and sound moulding technics is the stress of this article. We use vibrant moulding technics to meet the requirement that moulding reflects modern machine. Besides using classic CBR experimentation as a appraise method, we introduce repeated load MTS experimentation, it can separate elasticity and permanent deformation, it can let us analyse the deformation characteristic of graded aggregate. These two appraise methods supplement each other, analyse questions from different point of view.
Chapter five is concluding and suggestion. Not only put forward the production of this study, but also bring forward the studying content and direction which we would continue to do.
引文
[1]沙庆林.高速公路沥青路面早期破坏现象及预防.人民交通出版社.2001.5
[2]王端宜等.林齐试验路不同基层类型使用情况 10 年跟踪调查.公路交通科 技.2003.2,50～53
[3]李建东等.半刚性基层减裂措施的探讨.天津公路.2001.1
[4]邓有左等.半刚性基层沥青路面开裂原因及防治措施.公路 2001.6
[5]王明昌、徐士启等.半刚性基层冲刷唧浆的影响因素与防治.公路.1998.8
[6]蔡喜棉等.半刚性基层沥青路面裂缝的分析.华东公路.1995.1
[7]周志刚、张起森.结构层组合对路面裂缝扩展的影响.中国公路学报.1997.10
[8] Osama A.Abdulshafir etc. Laboratory Optimization of Asphalt Concrete Intermediate Course Mixes To Improve Flexible Pavement Performance. Transportation Research Record 1681
[9] HIGHWAYS AGENCY et al Design Manual for Roads and Bridges. Pavement Design and Maintenance, Pavement Construction Methods. HMSO. London.1994.HD28/94
[10]沈金安.对我国沥青路面结构与设计的一些思考.高新技术论坛.2002.5
[11]田赛男.远东大道多空隙沥青稳定碎石基层内部排水系统.同济出版社.[科技典路]1998
[12]张鹏飞.路面内部排水系统的设计与研究.同济大学博士论文.1999.9
[13]沈金安.解决高等级公路沥青路面水损坏的技术途径.全国高速公路沥青 路面技术研讨会.1999
[14]河北省交通科研所.河北正定试验路研究报告.1990,100～105
[15]王树森.级配碎石基层材料组成设计与工艺控制的研究.公路.2000.2
[16]辛德刚、王哲人、周晓龙.高速公路沥青路面材料与结构.人民交通出版社.2002.1
[17]王哲人、曹建新、王龙、董泽蛟.级配碎石混合料的动力变形特性.中日路面技术会议论文集.2001.11
[18]何兆益等.无粘结碎石材料级配研究.重庆交通学院学报.1996.9,22～25
[19]马松林等. 土石混合料室内振动压实试验研究.东北公路.2000.3
[20]孙耀东.碎石基层级配混合料组成设计的研究.哈尔滨工业大学工学硕士学位论文.2001.6
[21]秦卫、李静, 薄层沥青路面裂缝防治措施研究, 交通标准化, 2006 No.4
[22] 贾 春 香 . 二 灰 碎 石 基 层 强 度 形 成 机 理 及 阻 裂 措 施 . 施 工 技术 ,2005,(04),68～72
[23]李福普,陈景,严二虎,. 新型沥青路面结构在我国的应用研究. 公路交通科技 , 2006, (03)
[24] 高立波,. 柔性基层与半刚性基层组合结构在高速公路中应用的探讨. 辽宁交通科技 , 2006, (01),37～41
[25]王端宜,王建民,田书田. 寒冷地区适宜沥青路面结构的工程验证. 东北公路 , 1997, (02)
[26]任瑞波,钟岱辉,李海芝,安忠义,王哲人. 柔性基层改善沥青路面半刚性底基层温度状况分析. 哈尔滨工业大学学报 , 2004, (09)
[27]吕伟民,王锡通,郑录化. 国外沥青稳定柔性基层的材料与结构. 中外公路 , 2004, (06),18～22
[28]陈静云,任瑞波,李玉华,王哲人. 沥青路面柔性基层和半刚性基层模量理论研究. 大连理工大学学报 , 2004, (04)
[29]任瑞波,钟岱辉,邵长兰,安忠义,王哲人. 具有柔性基层的半刚性沥青路面的理论计算. 山东大学学报(工学版) , 2003, (06)
[30]胡珊,任瑞波,王树森,栾海,王哲人. 具有碎石基层的半刚性沥青混凝土路面的非线性有限元分析[J]公路 , 2003, (10) .105～108
[31]陈静云,李君,曹国英. 对高等级公路柔性基层(级配碎石层)进行弹塑性理论分析的方法[J]辽宁交通科技 , 2004, (02) .
[32]李长江,王哲人. 柔性基层与半刚性基层优化组合的关键技术[J]公路 , 2004,(08) .76～79
[33]李长江,栾海,张宏伟. 级配碎石柔性基层设计参数的研究[J]公路 , 2004, (07) .
[2]王端宜等.林齐试验路不同基层类型使用情况 10 年跟踪调查.公路交通科 技.2003.2,50～53
[3]李建东等.半刚性基层减裂措施的探讨.天津公路.2001.1
[4]邓有左等.半刚性基层沥青路面开裂原因及防治措施.公路 2001.6
[5]王明昌、徐士启等.半刚性基层冲刷唧浆的影响因素与防治.公路.1998.8
[6]蔡喜棉等.半刚性基层沥青路面裂缝的分析.华东公路.1995.1
[7]周志刚、张起森.结构层组合对路面裂缝扩展的影响.中国公路学报.1997.10
[8] Osama A.Abdulshafir etc. Laboratory Optimization of Asphalt Concrete Intermediate Course Mixes To Improve Flexible Pavement Performance. Transportation Research Record 1681
[9] HIGHWAYS AGENCY et al Design Manual for Roads and Bridges. Pavement Design and Maintenance, Pavement Construction Methods. HMSO. London.1994.HD28/94
[10]沈金安.对我国沥青路面结构与设计的一些思考.高新技术论坛.2002.5
[11]田赛男.远东大道多空隙沥青稳定碎石基层内部排水系统.同济出版社.[科技典路]1998
[12]张鹏飞.路面内部排水系统的设计与研究.同济大学博士论文.1999.9
[13]沈金安.解决高等级公路沥青路面水损坏的技术途径.全国高速公路沥青 路面技术研讨会.1999
[14]河北省交通科研所.河北正定试验路研究报告.1990,100～105
[15]王树森.级配碎石基层材料组成设计与工艺控制的研究.公路.2000.2
[16]辛德刚、王哲人、周晓龙.高速公路沥青路面材料与结构.人民交通出版社.2002.1
[17]王哲人、曹建新、王龙、董泽蛟.级配碎石混合料的动力变形特性.中日路面技术会议论文集.2001.11
[18]何兆益等.无粘结碎石材料级配研究.重庆交通学院学报.1996.9,22～25
[19]马松林等. 土石混合料室内振动压实试验研究.东北公路.2000.3
[20]孙耀东.碎石基层级配混合料组成设计的研究.哈尔滨工业大学工学硕士学位论文.2001.6
[21]秦卫、李静, 薄层沥青路面裂缝防治措施研究, 交通标准化, 2006 No.4
[22] 贾 春 香 . 二 灰 碎 石 基 层 强 度 形 成 机 理 及 阻 裂 措 施 . 施 工 技术 ,2005,(04),68～72
[23]李福普,陈景,严二虎,. 新型沥青路面结构在我国的应用研究. 公路交通科技 , 2006, (03)
[24] 高立波,. 柔性基层与半刚性基层组合结构在高速公路中应用的探讨. 辽宁交通科技 , 2006, (01),37～41
[25]王端宜,王建民,田书田. 寒冷地区适宜沥青路面结构的工程验证. 东北公路 , 1997, (02)
[26]任瑞波,钟岱辉,李海芝,安忠义,王哲人. 柔性基层改善沥青路面半刚性底基层温度状况分析. 哈尔滨工业大学学报 , 2004, (09)
[27]吕伟民,王锡通,郑录化. 国外沥青稳定柔性基层的材料与结构. 中外公路 , 2004, (06),18～22
[28]陈静云,任瑞波,李玉华,王哲人. 沥青路面柔性基层和半刚性基层模量理论研究. 大连理工大学学报 , 2004, (04)
[29]任瑞波,钟岱辉,邵长兰,安忠义,王哲人. 具有柔性基层的半刚性沥青路面的理论计算. 山东大学学报(工学版) , 2003, (06)
[30]胡珊,任瑞波,王树森,栾海,王哲人. 具有碎石基层的半刚性沥青混凝土路面的非线性有限元分析[J]公路 , 2003, (10) .105～108
[31]陈静云,李君,曹国英. 对高等级公路柔性基层(级配碎石层)进行弹塑性理论分析的方法[J]辽宁交通科技 , 2004, (02) .
[32]李长江,王哲人. 柔性基层与半刚性基层优化组合的关键技术[J]公路 , 2004,(08) .76～79
[33]李长江,栾海,张宏伟. 级配碎石柔性基层设计参数的研究[J]公路 , 2004, (07) .