道面结构不均匀冻胀模型试验及数值模拟
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摘要
为更好地揭示道面结构内部温度场、水分场和冻胀量的基本规律,为防治道面结构不均匀冻胀病害提供有效的理论依据,自主设计了道面结构不均匀冻胀模型试验箱,开展了外部水分入渗道肩和道面结构不均匀冻胀模型试验,基于ABAQUS的二次开发实现了道面结构内部水热力三场耦合数值模拟,并将数值模拟结果与模型试验结果进行了对比分析.结果表明:模型试验直观地模拟了跑道与道肩冻胀错台现象,并阐明了错台的原因是跑道与道肩的不均匀冻胀;客观地揭示了道面结构内部温度场、水分场及冻胀量的发展规律;水分通过道肩渗入道面结构引发水分场的重分布;道面结构不均匀冻胀是水热耦合作用的产物,温度梯度和降温速率影响着冻结过程中水分的迁移和积聚,水分场的重分布反过来也影响着温度的传递.数值模拟结果与模型试验结果吻合良好,且符合实际,数值模型的正确性和适用性得到了验证.结合模型试验的客观性优势和数值模拟的全面性优势有助于深入研究更多寒区构筑物地基的不均匀冻胀病害问题.
The paper is intended to reveal the basic laws of temperature field,water field and amount of frost heave inside the pavement structure,and to provide the theoretical basis for the prevention and cure of uneven frost heave.The test chamber of uneven frost heave of pavement structure was originally designed. The model tests of external water infiltration and uneven frost heave of pavement structure were conducted. The numerical simulation of the three-stage coupling of hydro-thermal-stress was realized on the basis of the targeted secondary exploitation of ABAQUS. The comparison of numerical simulation results and model test results were discussed from three aspects,i.e. temperature field,water field and amount of frost heave. The results showed that: the model test intuitively simulated the phenomenon of faulting of slab ends between runway and the shoulder. It illustrated that the cause of faulting of slab ends is the uneven frost heave of the runway and the shoulder. The basic development laws of uneven frost heave of pavement structure were revealed objectively. The external water infiltration has a great impact on water field redistribution. Uneven frost heave of pavement structure is the result of the coupling of temperature field and water field inside pavement structure. The cooling rate and temperature gradient impact on the water migration and accumulation,and in turn,the water field redistribution affects the delivery of temperature. The numerical simulation results were in good agreement with the model test results,both of which were consistent with the actual. The correctness and applicability of the numerical model were verified. The combination of the objective advantages of model test and the comprehensive advantage of numerical simulation contributes to in-depth research on the uneven frost heave of other structures in cold region.
The paper is intended to reveal the basic laws of temperature field,water field and amount of frost heave inside the pavement structure,and to provide the theoretical basis for the prevention and cure of uneven frost heave.The test chamber of uneven frost heave of pavement structure was originally designed. The model tests of external water infiltration and uneven frost heave of pavement structure were conducted. The numerical simulation of the three-stage coupling of hydro-thermal-stress was realized on the basis of the targeted secondary exploitation of ABAQUS. The comparison of numerical simulation results and model test results were discussed from three aspects,i.e. temperature field,water field and amount of frost heave. The results showed that: the model test intuitively simulated the phenomenon of faulting of slab ends between runway and the shoulder. It illustrated that the cause of faulting of slab ends is the uneven frost heave of the runway and the shoulder. The basic development laws of uneven frost heave of pavement structure were revealed objectively. The external water infiltration has a great impact on water field redistribution. Uneven frost heave of pavement structure is the result of the coupling of temperature field and water field inside pavement structure. The cooling rate and temperature gradient impact on the water migration and accumulation,and in turn,the water field redistribution affects the delivery of temperature. The numerical simulation results were in good agreement with the model test results,both of which were consistent with the actual. The correctness and applicability of the numerical model were verified. The combination of the objective advantages of model test and the comprehensive advantage of numerical simulation contributes to in-depth research on the uneven frost heave of other structures in cold region.
引文
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[10]王殿威.道路不均匀冻胀浅析[J].北方交通,2007,2:28.DOI:10.3969/j.issn.1673-6052.2007.02.011WENG Dianwei.Briefanalysis for differential frost of road[J].Northern Transportation,2007,2:28.DOI:10.3969/j.issn.1673-6052.2007.02.011
[11]SAARENKETO T,MATINTIPA A,VARIN P.The use of ground penetrating radar,thermal camera and laser scanner technology in asphalt crack detection and diagnostics[C].7th RILEM International Conference on Cracking in Pavements.Rovaniemi:Springer,2012:137
[12]ROY L P,BURN C R.A modified landform development model for the topography of drained thermokarst lake basins in fine-grained sediments[J].Earth Surface Processes and Landforms,2016,41:1504
[13]WANG T F,LIU J K,TIAN Y D,et al.Frost jacking characteristics of screw piles by model testing[J].Cold Regions Science and Technology,2017,138:98.DOI:org/10.1016/j.coldregions.2017.03.008
[14]岑国平,龙小勇,洪刚,等.含泥量对砂砾土冻胀特性的影响[J].科技导报,2015,5(33):78.DOI:10.3981/j.issn.1000-7857.2015.05.012CEN Guoping,LONG Xiaoyong,HONG Gang.et al.Influence of silt content on frost heaving properties of gravel soil[J].Science and Technology Review,2015,5(33):78.DOI:10.3981/j.issn.1000-7857.2015.05.012
[15]龙小勇,岑国平,蔡宛彤,等.压实度及水分对青藏高原季冻区砂砾土冻胀特性的影响[J].科技导报,2018,36(6):112.DOI:10.3981/j.issn.1000-7857.2018.06.014LONG Xiaoyong,CEN Guoping,CAI Wantong,et al.Influence of compaction degree and moisture on frost heaving properties of gravel soil in seasonally frozen region of Qinghai-Tibetan Plateau[J].Science and Technology Review,2018,36(6):112.DOI:10.3981/j.issn.1000-7857.2018.06.014
[16]王文杰.冻土水热力三场耦合的衬砌渠道冻胀数值模拟[D].杨凌:西北农林科技大学,2013WANG Wenjie.Frostheaving simulation model of lining canals based on heat-moisture-stress coupled fields of frozen soils[D].Yangling:Northwest Agriculture&Forestry University,2013
[17]XU X Z,OLIPHANT J L,TICE A R.Experimental study on factors affecting water migration in frozen morin clay[M].Proceedings of the 4th International Symposium on Ground Freezing,1985,1:123
[18]KONRAD J M,MORGENSTERN N R.Prediction of frost heave in the laboratory during transient freezing[J].Canadian Geotechnical Journal,1982,19:250
[19]傅琴.半刚性基层与贫混凝土基层水泥路面翘曲变形分析[J].公路交通科技(应用技术版),2008,10:52FU Qin.Bucklingdeformation analysis of cement pavement of semirigid base and lean concrete cement pavement[J].Journal of Highway and Transportation Research and Development(Application Technology Edition),2008,10:52
[20]曾惠珍.水泥混凝土路面的温度梯度研究[J].四川理工学院学报(自然科学版),2015,5(28):62.DOI:10.11863/j.suse.2015.05.12ZENG Huizhen.Study ontemperature gradient of the cement concrete pavement[J].Journal of Sichuan University of Science&Engineering(Natural Science Edition),2015,5(28):62.DOI:10.11863/j.suse.2015.05.12
[2]岑国平,龙小勇,洪刚,等.青藏高原季冻区砂砾土冻胀特性试验[J].哈尔滨工业大学学报,2016,3(48):53.DOI:10.11918/j.issn.0367-6234.2016.03.009CEN Guoping,LONG Xiaoyong,HONG Gang,et al.Frost heaving properties of gravel soil in seasonal frozen region of Qinghai-Tibet Plateau[J].Journal of Harbin Institute of Technology,2016,3(48):53.DOI:10.11918/j.issn.0367-6234.2016.03.009
[3]SHENG D,ZHANG S,NIU F J,et al.A potential new frost heave mechanism in high-speed railway embankments[J].Geotechnique,2013,64(2):144.DOI:10.1680/geot.13.P.042
[4]龙小勇,岑国平,蔡宛彤,等.砂砾土地基道面结构不均匀冻胀防治[J].空军工程大学(自然科学版),2018,1(19):97.DOI:10.3969/j.issn.1009-3516.2018.01.017LONG Xiaoyong,CEN Guoping,CAI Wantong,et al.Prevention ofuneven frost heave of pavement structure on gravel soil foundation[J].Journal of Air Force Engineering University(Natural Science E-dition),2018,1(19):97.DOI:10.3969/j.issn.1009-3516.2018.01.017
[5]EIGENBROD K D.Effects of cyclic freezing and thawing on volume changes and permeability of soft fine-grained soils[J].Canadian Geotechnical Journal,1996,33:529
[6]BILODEAU J P,DORE G,PIERRE P.Gradation influence on frost susceptibility of base granular materials[J].International Journal of Pavement Engineering,2008,9:397.DOI:org/10.1080/10298430802279819
[7]ZHOU J Z,WEI C F,WEI H Z,et al.Experimental and theoretical characterization of frost heave and ice lenses[J].Cold Regions Science and Technology,2014,104:76.DOI:org/10.1016/j.coldregions.2014.05.002
[8]HENDRY M T,ONWUDE L U,SEGO D C.A laboratory investigation of the frost heave susceptibility of fine-grained soil generated from the abrasion of a diorite aggregate[J].Cold Regions Science and Technology,2016,123:91.DOI:org/10.1016/j.coldregions.2015.11.016
[9]刘晓东.路面容许冻胀与不均匀冻胀[J].黑龙江交通科技,2006,4:37.DOI:10.3969/j.issn.1008-3383.2006.04.027LIU Xiaodong.Thefacultative frost heave and uneven frost heave of pavement[J].Journal of Heilongjiang Transportation Science and Technology,2006,4:37.DOI:10.3969/j.issn.1008-3383.2006.04.027
[10]王殿威.道路不均匀冻胀浅析[J].北方交通,2007,2:28.DOI:10.3969/j.issn.1673-6052.2007.02.011WENG Dianwei.Briefanalysis for differential frost of road[J].Northern Transportation,2007,2:28.DOI:10.3969/j.issn.1673-6052.2007.02.011
[11]SAARENKETO T,MATINTIPA A,VARIN P.The use of ground penetrating radar,thermal camera and laser scanner technology in asphalt crack detection and diagnostics[C].7th RILEM International Conference on Cracking in Pavements.Rovaniemi:Springer,2012:137
[12]ROY L P,BURN C R.A modified landform development model for the topography of drained thermokarst lake basins in fine-grained sediments[J].Earth Surface Processes and Landforms,2016,41:1504
[13]WANG T F,LIU J K,TIAN Y D,et al.Frost jacking characteristics of screw piles by model testing[J].Cold Regions Science and Technology,2017,138:98.DOI:org/10.1016/j.coldregions.2017.03.008
[14]岑国平,龙小勇,洪刚,等.含泥量对砂砾土冻胀特性的影响[J].科技导报,2015,5(33):78.DOI:10.3981/j.issn.1000-7857.2015.05.012CEN Guoping,LONG Xiaoyong,HONG Gang.et al.Influence of silt content on frost heaving properties of gravel soil[J].Science and Technology Review,2015,5(33):78.DOI:10.3981/j.issn.1000-7857.2015.05.012
[15]龙小勇,岑国平,蔡宛彤,等.压实度及水分对青藏高原季冻区砂砾土冻胀特性的影响[J].科技导报,2018,36(6):112.DOI:10.3981/j.issn.1000-7857.2018.06.014LONG Xiaoyong,CEN Guoping,CAI Wantong,et al.Influence of compaction degree and moisture on frost heaving properties of gravel soil in seasonally frozen region of Qinghai-Tibetan Plateau[J].Science and Technology Review,2018,36(6):112.DOI:10.3981/j.issn.1000-7857.2018.06.014
[16]王文杰.冻土水热力三场耦合的衬砌渠道冻胀数值模拟[D].杨凌:西北农林科技大学,2013WANG Wenjie.Frostheaving simulation model of lining canals based on heat-moisture-stress coupled fields of frozen soils[D].Yangling:Northwest Agriculture&Forestry University,2013
[17]XU X Z,OLIPHANT J L,TICE A R.Experimental study on factors affecting water migration in frozen morin clay[M].Proceedings of the 4th International Symposium on Ground Freezing,1985,1:123
[18]KONRAD J M,MORGENSTERN N R.Prediction of frost heave in the laboratory during transient freezing[J].Canadian Geotechnical Journal,1982,19:250
[19]傅琴.半刚性基层与贫混凝土基层水泥路面翘曲变形分析[J].公路交通科技(应用技术版),2008,10:52FU Qin.Bucklingdeformation analysis of cement pavement of semirigid base and lean concrete cement pavement[J].Journal of Highway and Transportation Research and Development(Application Technology Edition),2008,10:52
[20]曾惠珍.水泥混凝土路面的温度梯度研究[J].四川理工学院学报(自然科学版),2015,5(28):62.DOI:10.11863/j.suse.2015.05.12ZENG Huizhen.Study ontemperature gradient of the cement concrete pavement[J].Journal of Sichuan University of Science&Engineering(Natural Science Edition),2015,5(28):62.DOI:10.11863/j.suse.2015.05.12