新型双层CRCP结构及在城市道路中的应用
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摘要
针对目前水泥混凝土路面的结构特征和缺陷,研发双层连续配筋混凝土路面(CRCP)新结构,上基层采用贫混凝土,下基层采用沥青碎石或级配碎石,基层和面板之间设细型沥青混凝土夹层;面板设上、下2层连续钢筋,通过专门设计的支座固定,其中上层只设纵向钢筋,下层设纵横向钢筋;研发适用于双层CRCP新结构的接缝及施工方法,保持接缝处钢筋连续,有效解决现有接缝存在的问题。研究结果表明:双层CRCP新结构的疲劳寿命得到有效提升,在不良地基与板底脱空不利状况下更具优势和适用性;新型路面结构的部分技术特征已在实体工程中得到有效应用,且横向裂缝及平整度等关键技术指标满足要求;所提出的设计方法可为CRCP合理设计提供参考。
Aiming at the structure characteristics and the flaws of the existing of cement concrete pavement, a new double-layer continuously reinforced concrete pavement(CRCP) structure was developed and the optimized design with lean cement concrete at the surface base, and asphalt macadam or graded broken stone was used in the grassroots, thin asphalt concrete layer between the base course and the panel. Two layers of panel of continuous steel up and down were set up, and panel was fixed by specially designed bearings, the surface layer adopted longitudinal reinforcement, the lower layer adopted transverse and vertical reinforcement. A joint and construction method that was suitable for a new double-layer CRCP structure was studied to maintain a continuous reinforcement at the joint and effectively solve the existing problems in the joints. The results show that the fatigue life of the new double-layer CRCP structure is effectively improved, which is more advantageous and adaptable under the unfavorable conditions of poor foundation and void under slab. Some technical features of the new pavement structure are applied in physical engineering. The test results of the key technical indexes such as transverse cracks and flatness can satisfy demand. The designed methods can provide theoretical reference for the rational design of CRCP.
Aiming at the structure characteristics and the flaws of the existing of cement concrete pavement, a new double-layer continuously reinforced concrete pavement(CRCP) structure was developed and the optimized design with lean cement concrete at the surface base, and asphalt macadam or graded broken stone was used in the grassroots, thin asphalt concrete layer between the base course and the panel. Two layers of panel of continuous steel up and down were set up, and panel was fixed by specially designed bearings, the surface layer adopted longitudinal reinforcement, the lower layer adopted transverse and vertical reinforcement. A joint and construction method that was suitable for a new double-layer CRCP structure was studied to maintain a continuous reinforcement at the joint and effectively solve the existing problems in the joints. The results show that the fatigue life of the new double-layer CRCP structure is effectively improved, which is more advantageous and adaptable under the unfavorable conditions of poor foundation and void under slab. Some technical features of the new pavement structure are applied in physical engineering. The test results of the key technical indexes such as transverse cracks and flatness can satisfy demand. The designed methods can provide theoretical reference for the rational design of CRCP.
引文
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[8]王虎.连续配筋混凝土路面静动力学计算与分析[D].西安:长安大学理学院,2001:27-33.WANG Hu.Calculation and analysis of statics and dynamics in continuously reinforced concrete pavement[D].Xi’an Chang’an University.School of Science,2001:27-33.
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[11]戴逸清,陈阳利,顾兴宇,等.玄武岩纤维筋连续配筋混凝土路面力学分析[J].公路交通科技,2016,33(6):15-19.DAI Yiqing,CHEN Yangli,GU Xingyu,et a1.Mechanical analysis on BFRP continuously reinforced concrete pavement[J].Journal of Highway and Transportation Research and Development,2016,33(6):15-19.
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[13]OUZAA K,BENMANSOUR M B.Cracks in continuously reinforced concrete pavement[J].Arabian Journal for Science and Engineering,2014,39(12):8593-8608.
[14]王衍辉,张洪亮,徐士翠.连续配筋混凝土路面裂缝间距的主动控制[J].公路交通科技,2012,29(9):24-29.WANG Yanhui,ZHANG Hongliang,XU Shicui.Active crack spacing control for continuously reinforced concrete pavement[J].Journal of Highway and Transportation Research and Development,2012,29(9):24-29.
[15]CHOI S,HA S,WON M C.Horizontal cracking of continuously reinforced concrete pavement under environmental loadings[J].Construction&Building Materials,2011,25(11):4250-4262.
[16]左志武,张洪亮,王衍辉.连续配筋混凝土路面早期力学响应现场测试与分析[J].中国公路学报,2010,23(3):22-28.ZUO Zhiwu,ZHANG Hongliang,WANG Yanhui.Field measurement and analysis of early-age mechanical response of continuously reinforced concrete pavement[J].China Journal of Highway and Transport,2010,23(3):22-28.
[17]CJJ 169-2011,城镇道路路面设计规范[S].CJJ 169-2011,Code for pavement design of urban road[S].
[18]ROESLER J R,HILLER J E,BRAND A S.Continuously reinforced concrete pavement manual:guidelines for design,construction,maintenance,and rehabilitation[M].Washington DC,USA:Department of Transportation Federal Highway Administration,2016:13-14.
[2]李盛,刘朝晖,李宇峙.CRC+AC复合式路面结构层厚度对温度效应及车辙变形的影响[J].中国公路学报,2012,25(1):21-28.LI Sheng,LIU Zhaohui,LI Yuzhi.Influence of structure layer thickness of crc+ac composite pavement on temperature effect and rutting deformation[J].China Journal of Highway and Transport,2012,25(1):21-28..
[3]张洪亮,左志武.连续配筋混凝土路面[M].北京:人民交通出版社,2011:1-3.ZHANG Hongliang,ZHUO Zhiwu.Continuously reinforced concrete pavement[M].Beijing:China Communications Press,2011:1-3.
[4]王斌,黄卫,杨军,等.连续配筋混凝土路面路用性能预测与评价方法[J].中国公路学报,2012,25(5):24-29.WANG Bin,HUANG Wei,YANG Jun,et a1.Prediction and evaluation methods for pavement performance of continuous reinforced concrete pavement[J].China Journal of Highway and Transport,2012,25(5):24-29.
[5]ZHOU W J,CHOI P,SARAF S,et al.Premature distresses at transverse construction joints(TCJs)in continuously reinforced concrete pavements[J].Construction and Building Materials,2014,55:212-219.
[6]JTG D40-2011,公路水泥混凝土路面设计规范[S].JTG D40-2011,Specifications of cement concrete pavement design for highway[S].
[7]李盛,杨帆,曹前,等.连续配筋混凝土路面结构优化及性能评价[J].土木工程学报,2017,50(7):122-128.LI Sheng,YANG Fan,CAO Qian,et al.Structure optimization and performance evaluation of continuously reinforced concrete pavement[J].China Civil Engineering Journal,2017,50(7):122-128.
[8]王虎.连续配筋混凝土路面静动力学计算与分析[D].西安:长安大学理学院,2001:27-33.WANG Hu.Calculation and analysis of statics and dynamics in continuously reinforced concrete pavement[D].Xi’an Chang’an University.School of Science,2001:27-33.
[9]YANG G,BRADFORD M A.A refined modelling for thermal-induced upheaval buckling of continuously reinforced concrete pavements[J].Engineering Structures,2017,150:256-270.
[10]廖公云,黄晓明.ABAQUS有限元软件在道路工程中的应用[M].南京:东南大学出版社,2008:153-160.LIAO Gongyun,HUANG Xiaoming.Application of ABAQUSfinite element software in highway engineering[M].Nanjing:Southeast University Press,2008:153-160.
[11]戴逸清,陈阳利,顾兴宇,等.玄武岩纤维筋连续配筋混凝土路面力学分析[J].公路交通科技,2016,33(6):15-19.DAI Yiqing,CHEN Yangli,GU Xingyu,et a1.Mechanical analysis on BFRP continuously reinforced concrete pavement[J].Journal of Highway and Transportation Research and Development,2016,33(6):15-19.
[12]CHEN Xiaobing,ZHAO Ronglong,TONG Jinhu,et a1.Critical load position for cavities beneath CRCP slab under vehicle loading[J].Journal of Southeast University(English Edition),2016,32(1):78-84.
[13]OUZAA K,BENMANSOUR M B.Cracks in continuously reinforced concrete pavement[J].Arabian Journal for Science and Engineering,2014,39(12):8593-8608.
[14]王衍辉,张洪亮,徐士翠.连续配筋混凝土路面裂缝间距的主动控制[J].公路交通科技,2012,29(9):24-29.WANG Yanhui,ZHANG Hongliang,XU Shicui.Active crack spacing control for continuously reinforced concrete pavement[J].Journal of Highway and Transportation Research and Development,2012,29(9):24-29.
[15]CHOI S,HA S,WON M C.Horizontal cracking of continuously reinforced concrete pavement under environmental loadings[J].Construction&Building Materials,2011,25(11):4250-4262.
[16]左志武,张洪亮,王衍辉.连续配筋混凝土路面早期力学响应现场测试与分析[J].中国公路学报,2010,23(3):22-28.ZUO Zhiwu,ZHANG Hongliang,WANG Yanhui.Field measurement and analysis of early-age mechanical response of continuously reinforced concrete pavement[J].China Journal of Highway and Transport,2010,23(3):22-28.
[17]CJJ 169-2011,城镇道路路面设计规范[S].CJJ 169-2011,Code for pavement design of urban road[S].
[18]ROESLER J R,HILLER J E,BRAND A S.Continuously reinforced concrete pavement manual:guidelines for design,construction,maintenance,and rehabilitation[M].Washington DC,USA:Department of Transportation Federal Highway Administration,2016:13-14.
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