FWD荷载作用下碾压混凝土基层沥青路面的动态响应试验
|
摘要
为研究碾压混凝土基层沥青路面在落锤式弯沉仪(falling weight deflectometer,FWD)荷载作用下的动态响应,铺筑了试验路,通过在试验路内部布设应变传感器,获取了不同工况条件下试验路路面结构层内的应变响应,分析了碾压混凝土基层沥青路面的动态特性及荷载、温度等因素对路面动态响应的影响,构建了碾压混凝土基层沥青路面结构沥青面层底最大水平拉应变预估模型.结果表明:FWD荷载作用下,在距离荷载板中心30 cm范围内路表弯沉变化较大,距离荷载板中心30 cm范围以外,路表弯沉随位置变化的幅度较小,且温度越高,这种趋势越明显;在加载中心点的正下方,路面结构层内部表现为拉应变,且荷载越大,应变越大;相同荷载作用下,碾压混凝土基层沥青路面的底基层、基层与面层底的应变均小于传统半刚性基层沥青路面,随着荷载水平增加及温度升高,路面结构层内部的应变逐渐增大;路面结构层底的应变随荷载增加呈线性增加,随温度升高呈指数增加,路面温度升高50%,50 kN荷载作用下沥青面层底的应变水平与100 kN荷载相当.
To investigate the dynamic response of roller compacted concrete base(RCC-base) asphalt pavement under the load of falling weight deflectometer(FWD), a test road was paved. Laying strain sensors inside the test road, the strain responses in the pavement structure layer of the test road under different work conditions were obtained. The dynamic characteristics of RCC-base asphalt pavement and the effects of load and temperature on the dynamic response of pavement were analyzed. The prediction model of the maximum horizontal tensile strain at the bottom of RCC-base asphalt pavement was established. The results show that under the FWD load, the deflection of pavement surface varies greatly within the range of 30 cm from the center of load plate, and the deflection of pavement surface varies slightly with the location outside 30 cm from the center of load plate. The higher the temperature is, the more obvious the trend is. Under the load center, the bottom of pavement structure layer shows tension strain, and the greater the load is, the greater the strain value is. Under the same load, the strains of subbase, base and surface of RCC-base asphalt pavement are less than those of traditional semi-rigid base asphalt pavement. With the increasing of load level and temperature, the strain of pavement structure layer is increased gradually. The strain at the bottom of asphalt pavement structure is increased linearly with the increasing of load and exponentially with the increasing of temperature. When the pavement temperature is increased by 50%, the strain level of RCC-base asphalt pavement under 50 kN load is equivalent to that under 100 kN load.
To investigate the dynamic response of roller compacted concrete base(RCC-base) asphalt pavement under the load of falling weight deflectometer(FWD), a test road was paved. Laying strain sensors inside the test road, the strain responses in the pavement structure layer of the test road under different work conditions were obtained. The dynamic characteristics of RCC-base asphalt pavement and the effects of load and temperature on the dynamic response of pavement were analyzed. The prediction model of the maximum horizontal tensile strain at the bottom of RCC-base asphalt pavement was established. The results show that under the FWD load, the deflection of pavement surface varies greatly within the range of 30 cm from the center of load plate, and the deflection of pavement surface varies slightly with the location outside 30 cm from the center of load plate. The higher the temperature is, the more obvious the trend is. Under the load center, the bottom of pavement structure layer shows tension strain, and the greater the load is, the greater the strain value is. Under the same load, the strains of subbase, base and surface of RCC-base asphalt pavement are less than those of traditional semi-rigid base asphalt pavement. With the increasing of load level and temperature, the strain of pavement structure layer is increased gradually. The strain at the bottom of asphalt pavement structure is increased linearly with the increasing of load and exponentially with the increasing of temperature. When the pavement temperature is increased by 50%, the strain level of RCC-base asphalt pavement under 50 kN load is equivalent to that under 100 kN load.
引文
[ 1 ] 吕彭民,董忠红.车辆-沥青路面系统力学分析[M].北京:人民交通出版社,2010.
[ 2 ] 游庆龙,王随柱,贾玲,等.FWD路面弯沉数据筛选方法[J].江苏大学学报(自然科学版),2015,36(6):711-715.YOU Q L,WANG S Z,JIA L,et al.Data filtering methods of FWD pavement deflection[J].Journal of Jiangsu University(Natural Science Edition),2015,36(6):711-715.(in Chinese)
[ 3 ] 王旭东.沥青路面弯沉指标的探讨[J].公路交通科技,2015,32(1):1-13.WANG X D.Discussion of asphalt pavement deflection indicator[J].Journal of Highway and Transportation Research and Development,2015,32(1):1-13.(in Chinese)
[ 4 ] 刘圣洁,游庆龙,丛卓红.基于响应面法的沥青路面剪应力分析[J].江苏大学学报(自然科学版),2015,36(1):114-118.LIU S J,YOU Q L,CONG Z H.Analysis of shear stress for asphalt pavement based on response surface metho-dology[J].Journal of Jiangsu University(Natural Science Edition),2015,36(1):114-118.(in Chinese)
[ 5 ] HAMIM A,YUSOFFA N I M,CEYLAN H,et al.Comparative study on using static and dynamic finite element mo-dels to develop FWD measurement on flexible pavement structures[J].Construction and Building Materials,2018,176(1):583-592.
[ 6 ] LI M Y,WANG H,XU G J,et al.Finite element mo-deling and parametric analysis of viscoelastic and nonli-near pavement responses under dynamic FWD loading[J].Construction and Building Materials,2017,141(1):23-35.
[ 7 ] 张蓓,刘强,钟燕辉,等.荷载作用下刚性路面弯沉的动力响应分析[J].公路交通科技,2009,26(7):33-37.ZHANG B,LIU Q,ZHONG Y H,et al.Analysis of dynamic response of rigid pavement deflection under FWD load[J].Journal of Highway and Transportation Research and Development,2009,26(7):33-37.(in Chinese)
[ 8 ] 郑元勋,熊晓莉,黄静卿.FWD作用下沥青路面动态弯沉数值分析[J].郑州大学学报(理学版),2012,44(2):120-124.ZHENG Y X,XIONG X L,HUANG J Q.Numerical study of dynamic deflection of asphalt pavement under FWD[J].J Zhengzhou Univ (Nat Sci Ed),2012,44(2):120-124.(in Chinese)
[ 9 ] 田庚亮,董泽蛟,胡庆立,等.光纤光栅传感器与沥青混合料协同变形分析[J].哈尔滨工业大学学报,2009,41(5):73-76.TIAN G L,DONG Z J,HU Q L,et al.Analysis of coordination between asphalt mixture and fiber bragg gra-ting sensor[J].Journal of Harbin Institute of Technology,2009,41(5):73-76.(in Chinese)
[10] 董泽蛟,柳浩,谭忆秋,等.沥青路面三向应变响应现场实测研究[J].华南理工大学学报(自然科学版),2009,37(7):46-51.DONG Z J,LIU H,TAN Y Q,et al.Field measurement study on three-direction strain response of asphalt pavement[J].Journal of South China University of Technology(Natural Science Edition),2009,37(7):46-51.(in Chinese)
[11] 杨果岳,张家生,王晅,等.车辆速度与载重对路面结构影响的现场试验研究[J].岩土力学,2008,29(11):3099-3103.YANG G Y,ZHANG J S,WANG H,et al.Experimental research on dynamic response of road pavement under different loads and speeds of vehicles[J].Rock and Soil Mechanics,2008,29(11):3099-3103.(in Chinese)
[12] 肖川,邱延峻,艾长发,等.行车荷载作用下沥青路面动力特性试验[J].长安大学学报(自然科学版),2016,36(2):26-34.XIAO C,QIU Y J,AI C F.Experiment on dynamical characteristics of asphalt pavement under vehicle load[J].Journal of Chang'an University (Nature Science Edition),2016,36(2):26-34.(in Chinese)
[13] 肖川,邱延峻,曾杰,等.FWD荷载作用下的沥青路面实测动力响应研究[J].公路交通科技,2014,31(2):1-8.XIAO C,QIU Y J,ZENG J,et al.Study on measured dynamic response of asphalt pavement under FWD load[J].Journal of Highway and Transportation Research and Development,2014,31(2):1-8.(in Chinese)
[14] 曾杰,肖川,李保险,等.FWD荷载下沥青路面动力响应的温度影响作用研究[J].公路工程,2015,40(1):107-111.ZENG J,XIAO C,LI B X,et al.Study on dynamic response of asphalt pavement under FWD load base on different temperature conditions[J].Highway Engineering,2015,40(1):107-111.(in Chinese)
[15] TIMM D H,NEWCOMB D E.Perpetual pavement design for flexible pavements in the US[J].International Journal of Pavement Engineering,2006,7(2):111-119.
[16] 杨永顺,王林,韦金城,等.重载作用下典型路面结构动态响应数据采集与分析[J].公路交通科技,2010,27(5):11-16.YANG Y S,WANG L,WEI J C,et al.Typical pavement structure dynamic response data collection and analysis under heavy vehicle loading[J].Journal of Highway and Transportation Research and Development,2010,27(5):11-16.(in Chinese)
[17] 董泽蛟,谭忆秋.沥青路面动力响应研究[M].北京:科学出版社,2015.
[18] LI M Y,WANG H,Prediction of asphalt pavement responses from FWD surface deflections using soft computing methods[J] J Transp Eng(Part B:Pavements),2018,144(2):04018014.
[19] 郝培文,张肖宁.沥青及沥青混合料 [M].北京:人民交通出版社,2009.
[ 2 ] 游庆龙,王随柱,贾玲,等.FWD路面弯沉数据筛选方法[J].江苏大学学报(自然科学版),2015,36(6):711-715.YOU Q L,WANG S Z,JIA L,et al.Data filtering methods of FWD pavement deflection[J].Journal of Jiangsu University(Natural Science Edition),2015,36(6):711-715.(in Chinese)
[ 3 ] 王旭东.沥青路面弯沉指标的探讨[J].公路交通科技,2015,32(1):1-13.WANG X D.Discussion of asphalt pavement deflection indicator[J].Journal of Highway and Transportation Research and Development,2015,32(1):1-13.(in Chinese)
[ 4 ] 刘圣洁,游庆龙,丛卓红.基于响应面法的沥青路面剪应力分析[J].江苏大学学报(自然科学版),2015,36(1):114-118.LIU S J,YOU Q L,CONG Z H.Analysis of shear stress for asphalt pavement based on response surface metho-dology[J].Journal of Jiangsu University(Natural Science Edition),2015,36(1):114-118.(in Chinese)
[ 5 ] HAMIM A,YUSOFFA N I M,CEYLAN H,et al.Comparative study on using static and dynamic finite element mo-dels to develop FWD measurement on flexible pavement structures[J].Construction and Building Materials,2018,176(1):583-592.
[ 6 ] LI M Y,WANG H,XU G J,et al.Finite element mo-deling and parametric analysis of viscoelastic and nonli-near pavement responses under dynamic FWD loading[J].Construction and Building Materials,2017,141(1):23-35.
[ 7 ] 张蓓,刘强,钟燕辉,等.荷载作用下刚性路面弯沉的动力响应分析[J].公路交通科技,2009,26(7):33-37.ZHANG B,LIU Q,ZHONG Y H,et al.Analysis of dynamic response of rigid pavement deflection under FWD load[J].Journal of Highway and Transportation Research and Development,2009,26(7):33-37.(in Chinese)
[ 8 ] 郑元勋,熊晓莉,黄静卿.FWD作用下沥青路面动态弯沉数值分析[J].郑州大学学报(理学版),2012,44(2):120-124.ZHENG Y X,XIONG X L,HUANG J Q.Numerical study of dynamic deflection of asphalt pavement under FWD[J].J Zhengzhou Univ (Nat Sci Ed),2012,44(2):120-124.(in Chinese)
[ 9 ] 田庚亮,董泽蛟,胡庆立,等.光纤光栅传感器与沥青混合料协同变形分析[J].哈尔滨工业大学学报,2009,41(5):73-76.TIAN G L,DONG Z J,HU Q L,et al.Analysis of coordination between asphalt mixture and fiber bragg gra-ting sensor[J].Journal of Harbin Institute of Technology,2009,41(5):73-76.(in Chinese)
[10] 董泽蛟,柳浩,谭忆秋,等.沥青路面三向应变响应现场实测研究[J].华南理工大学学报(自然科学版),2009,37(7):46-51.DONG Z J,LIU H,TAN Y Q,et al.Field measurement study on three-direction strain response of asphalt pavement[J].Journal of South China University of Technology(Natural Science Edition),2009,37(7):46-51.(in Chinese)
[11] 杨果岳,张家生,王晅,等.车辆速度与载重对路面结构影响的现场试验研究[J].岩土力学,2008,29(11):3099-3103.YANG G Y,ZHANG J S,WANG H,et al.Experimental research on dynamic response of road pavement under different loads and speeds of vehicles[J].Rock and Soil Mechanics,2008,29(11):3099-3103.(in Chinese)
[12] 肖川,邱延峻,艾长发,等.行车荷载作用下沥青路面动力特性试验[J].长安大学学报(自然科学版),2016,36(2):26-34.XIAO C,QIU Y J,AI C F.Experiment on dynamical characteristics of asphalt pavement under vehicle load[J].Journal of Chang'an University (Nature Science Edition),2016,36(2):26-34.(in Chinese)
[13] 肖川,邱延峻,曾杰,等.FWD荷载作用下的沥青路面实测动力响应研究[J].公路交通科技,2014,31(2):1-8.XIAO C,QIU Y J,ZENG J,et al.Study on measured dynamic response of asphalt pavement under FWD load[J].Journal of Highway and Transportation Research and Development,2014,31(2):1-8.(in Chinese)
[14] 曾杰,肖川,李保险,等.FWD荷载下沥青路面动力响应的温度影响作用研究[J].公路工程,2015,40(1):107-111.ZENG J,XIAO C,LI B X,et al.Study on dynamic response of asphalt pavement under FWD load base on different temperature conditions[J].Highway Engineering,2015,40(1):107-111.(in Chinese)
[15] TIMM D H,NEWCOMB D E.Perpetual pavement design for flexible pavements in the US[J].International Journal of Pavement Engineering,2006,7(2):111-119.
[16] 杨永顺,王林,韦金城,等.重载作用下典型路面结构动态响应数据采集与分析[J].公路交通科技,2010,27(5):11-16.YANG Y S,WANG L,WEI J C,et al.Typical pavement structure dynamic response data collection and analysis under heavy vehicle loading[J].Journal of Highway and Transportation Research and Development,2010,27(5):11-16.(in Chinese)
[17] 董泽蛟,谭忆秋.沥青路面动力响应研究[M].北京:科学出版社,2015.
[18] LI M Y,WANG H,Prediction of asphalt pavement responses from FWD surface deflections using soft computing methods[J] J Transp Eng(Part B:Pavements),2018,144(2):04018014.
[19] 郝培文,张肖宁.沥青及沥青混合料 [M].北京:人民交通出版社,2009.