Temperature Field Characteristics of High-Speed Railway Subgrade Surface with Asphalt Concrete Layer in Cold Regions
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摘要: 为了把握基床表层含沥青混凝土层的温度场特性，采用瞬态传热的有限元分析方法，对寒区高铁无砟轨道结构温度场时空分布规律及沥青混凝土层的影响进行了分析. 首先，建立了基于哈尔滨-齐齐哈尔客运专线无砟轨道结构（CRTS）的温度场数值模型；然后，运用现场观测结果对数值模型进行了校核；最后，运用对比分析方式评估了基床表层沥青混凝土层的温度场特性，以及无砟轨道结构特征横截面与特征点位的温度分布的时变规律. 结果表明：东北地区无砟轨道结构温度场具有明显的非均匀性，其横向温度分布呈现双U型分布特征，温度梯度呈现非线性特性，且随着季节变换呈现较复杂的正负梯度交替变化；东北地区无砟轨道结构对路基温度的影响深度约为0.4 m，月影响深度约为2.5 m，年影响深度可达4.0 m；基床表层铺设的薄层沥青混凝土对路基起到了良好的保温作用，会使得基床表层的日平均温度提高1～7 ℃左右，而寒区无砟轨道结构温度场的分布规律不会显著改变.Abstract: In order to gain better insight on the temperature field characteristics of the subgrade surface with asphalt concrete layer in cold regions, the transient thermal finite element analysis is adopted to study the temperature field spatial-temporal distribution of ballastless tracks in cold regions and the influence of asphalt concrete layer. Firstly, numerical models based on the CRTS system (ballastless track) of Haerbin-Qiqihaer passenger line were developed. The numerical model was then verified with the field test results. Finally, the temperature field characteristics of the subgrade surface with asphalt concrete layer and the time-varying law of the temperature characteristics for typical cross sections and typical points in the ballastless tracks are evaluated through comparison.. The results show that the temperature field of track slab system in cold regions have a non-uniform distribution and show a double U-shaped distribution horizontally. The temperature gradient is non-linear, and the averaged monthly temperature gradient alternate between positive and negative. The subgrade depth, of which the temperature is affected by the ballastless track structure in northeastern China, can reach 0.4 m in a day, 2.5 m in a month and about 4.0 m in a year. It is concluded that the thin asphalt concrete layer over the subgrade surface has the function of heat preservation and prompts 1−7 ℃ increase in the daily average temperature of subgrade surface whereas it makes no significant change to the temperature field distribution of the ballastless track subgrade in cold regions.
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图 1 无砟轨道温度场的主要影响因素
Figure 1. Main factors affecting the temperature field of ballastless track system
图 2 无砟轨道一体化温度场模型（单位：m）
Figure 2. Integrated temperature field model of ballastless track system (unit：m)
图 3 试验段AP边界的年温度变化曲线
Figure 3. Annual temperature evolution curves on the AP boundary of test section
图 4 轨道中心0.5 m深的年温度实测结果与仿真结果对比
Figure 4. Comparison of averaged daily temperature between measured and simulated results at the 0.5 m depth of track slab center
图 5 基床表层全年日均温度变化
Figure 5. Annual average temperature variation per day at subgradesurface
图 6 1月和7月基床表层表面温度的时变曲线
Figure 6. Evolution curves of subgradesurface temperature in January and July
图 7 基床表层设置薄层沥青混凝土时无砟轨道结构的温度增量度的分布
Figure 7. Averaged annual temperature increments along depth with asphalt layer on the top of subgrade
图 8 基床表层设置沥青混凝土层前后上下表面温度沿横向的分布规律
Figure 8. Horizontal temperature distributions at the top and bottom surfaces of subgrade with and without asphalt layer
图 9 寒区无砟轨道结构轨道中心沿深度日均温度分布的逐月变化规律
Figure 9. Monthly evolution of averaged daily temperature distribution along depth at the center of track slab in cold region
图 10 无砟轨道结构在冬夏春3个季节的日均小时温度分布云图
Figure 10. Contour of averaged hour temperature distribution of ballastless track subgrade in spring, summer and autumn
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中华人民共和国铁道部. 高速铁路设计规范: TB 10621—2014[S]. 北京: 中国铁道出版社, 2010 赵勇,司道林,姜子清,等. 严寒地区CRTSⅠ型板式无砟轨道温度场及变形研究[J]. 铁道建筑,2016(5): 47-52. doi: 10.3969/j.issn.1003-1995.2016.05.11ZHAO Yong, SI Daolin, JIANG Ziqing, et al. Study on temperature field and seformation of CRTS I slab-type ballastless track in severe cold area[J]. Railway Engineering, 2016(5): 47-52. doi: 10.3969/j.issn.1003-1995.2016.05.11 ZHU Shengyang, CAI Chengbiao. Interface damage and its effect on vibrations of slab track under temperature and vehicle dynamic loads[J]. International Journal of Non-Linear Mechanics, 2014, 58: 222-232. doi: 10.1016/j.ijnonlinmec.2013.10.004 杨政. CRTSIII型板式轨道层间离缝下的受力及维修限值研究[D]. 成都: 西南交通大学, 2014 李健,赵坪锐,万章博,等. 双块式无砟轨道温度场试验研究和数值分析[J]. 中国科学:技术科学,2014,44(7): 729-735.LI Jian, ZHAO Pingrui, WAN Zhangbo, et al. Experimental research and numerical analysis of temperature field on bi-block ballastless track[J]. Science China Technologies, 2014, 44(7): 729-735. 闫斌,刘施,戴公连,等. 我国典型地区无砟轨道非线性温度梯度及温度荷载模式[J]. 铁道学报,2016,38(8): 81-86. doi: 10.3969/j.issn.1001-8360.2016.08.012YAN Bin, LIU Shi, DAI Gonglian. et al. Vertical nonlinear temperature distribution and temperature model of unballassted track areas of China[J]. Journal of the China Railway Society, 2016, 38(8): 81-86. doi: 10.3969/j.issn.1001-8360.2016.08.012 韩铠屹,罗成平,刘源. 寒冷地区铁路客运专线路基温度场数值模拟[J]. 武汉大学学报,2015,48(2): 207-211.HAN Kaiqi, LUO Chengping, LIU Yuan. Numercial simulation of thermal field in subgrade of passenger dedicated railway line in cold region[J]. Engineering Journal of Wuhan university, 2015, 48(2): 207-211. 吴斌,刘参,曾志平,等. CRTSⅡ型板式无砟轨道温度场特征研究[J]. 铁道工程学报,2016(3): 29-33. doi: 10.3969/j.issn.1006-2106.2016.03.006WU Bin, LIU Can, ZENG Zhiping, et al. Research on the temperature field characteristic of CRTSⅡ slab ballastless track[J]. Journal of Railway Engineering Society, 2016(3): 29-33. doi: 10.3969/j.issn.1006-2106.2016.03.006 YUAN Chang, NIU Fujun, YU Qihao, et al. Numerical analysis of applying special pavement to solve the frost heave diseases of high-speed railway roadbeds in seasonally frozen ground regions[J]. Science in Cold and Arid Regions, 2015, 7(4): 340-347. 欧祖敏,孙璐,程群群. 高速铁路无砟轨道温度场简化计算方法[J]. 浙江大学学报(工学版),2015,49(3): 482-487.OU Zumin, SUN Lu, CHENG Qunqun. Simplified calculation of temperature field in high-speed railway ballastles track structure[J]. Journal of Zhejiang University (Engineering Science), 2015, 49(3): 482-487. 戴公连,苏海霆,闫斌,等. 春季纵连板式无砟轨道非线性温度分布[J]. 华南理工大学学报(自然科学版),2016,44(2): 20-25. doi: 10.3969/j.issn.1000-565X.2016.02.004DAI Gonglian, SU Haiting, YAN Bin, et al. Nonlinear temperature distribution of longitudinal plate-type ballastless track in spring[J]. Journal of South China University of Technology (Natural Science Edition), 2016, 44(2): 20-25. doi: 10.3969/j.issn.1000-565X.2016.02.004 刘学毅,李佳莉,康维新,等. 无砟轨道温度简便计算及极端天气影响分析[J]. 西南交通大学学报,2017,52(6): 1037-1045,1060.LIU Xueyi, LI Jiali, KANG Weixin, etal. Simplified calculation of temperature in concrete slab of ballastless track and influence of extreme weathe[J]. Journal of Southwest Jiaotong University, 2017, 52(6): 1037-1045,1060. 中国铁道学科研究院铁道建筑研究所. 高寒地区高速铁路沥青混凝土防水封闭层试验研究[R]. 南京: 东南大学, 2015 LIU Song, YANG Jun, CHEN Xianhua, et al. Application of mastic asphalt waterproofing layer in high-speed railway track in cold regions[J]. Applied Sciences, 2018, 8(5): 667. 刘晓春,金城,余志武,等. CRTSⅢ型板式无砟轨道横向弯曲疲劳试验[J]. 西南交通大学学报,2018,53(1): 23-30.LIU Xiaochun, JIN Cheng, YU Zhiwu, et al. Fatigue testing of CRTS III ballastless slab track structures under transverse bonding[J]. Journal of Southwest Jiaotong University, 2018, 53(1): 23-30. MICHAEL J M, HOWARD N S, BRUCE R M, et al. Introduction to thermal systems engineering: thermodynamics, fluid mechanics, and heat transfer[M]. America: John Wiley & Sons Inc., 2003: 456-498 欧祖敏,孙璐,程群群. 基于气象资料的无砟轨道温度场计算与分析[J]. 铁道学报,2014,36(11): 106-111. doi: 10.3969/j.issn.1001-8360.2014.11.021OU Zumin, SUN Lu, CHEN Qunqun. Analysis on temperature field of ballastless track structure based on meteorological data[J]. Journal of Railway Engineering Society, 2014, 36(11): 106-111. doi: 10.3969/j.issn.1001-8360.2014.11.021 曹世豪,邓非凡,赵春光,等. 基于气象资料的无砟轨道瞬态温度场特性研究[J]. 铁道建筑,2016(5): 28-33. doi: 10.3969/j.issn.1003-1995.2016.05.07CAO Shihao, DENG Feifan, ZHAO Chunguang, et al. Study on transient temperature field characteristics of ballastless track based on meteorological data[J]. Railway Engineering, 2016(5): 28-33. doi: 10.3969/j.issn.1003-1995.2016.05.07 -
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