临线堆载影响下高铁路基长期沉降预测方法
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摘要
高铁对变形十分敏感,而铁道的临线区域又不可避免地会遭遇到土体等堆载的作用,因此工程中十分关注临线堆载下铁路路基变形的情况和趋势。通常采取的办法是对特定监测点进行定期观测,但是这种观测仅能反映铁路当前的变形情况,无法对未来做出判断。如能基于已有数据对铁路路基未来变形进行有效的预测,提早发现铁路未来某时间将会出现的预警变形,对于高铁的安全运营管理具有重要意义。笔者等提出的蠕变沉降实用算法,可根据有限沉降数据预测未来变形,论证了使用蠕变实用算法预测高铁路基长期变形的可行性并给出了根据已有实测数据时段计算特定误差下的有效预测范围的方法。
The long-term settlement of high-speed railway subgrade usually occurs under the influences of the nearby loads, and it will result in unsafety of the high-speed running trains. A practical computation method for creep is proposed by Yao et al,and it can predict the future deformation according to the limited settlement data. Taking the simulating data from the ABAQUS software which can simulate the increasing subgrade settlement with time as examples, the feasibility of using the practical method for creep to predict the long-term deformation of high-speed railway subgrade is demonstrated, and the relavant method to calculate the effective range of the prediction under certain errors is also given. It is shown that by using the practical method for creep, we can accurately predict the deformation based on the existing data, and also can get the early warning deformation of the railway for the future. It is of great significance to the safe operation management of high-speed railways.
The long-term settlement of high-speed railway subgrade usually occurs under the influences of the nearby loads, and it will result in unsafety of the high-speed running trains. A practical computation method for creep is proposed by Yao et al,and it can predict the future deformation according to the limited settlement data. Taking the simulating data from the ABAQUS software which can simulate the increasing subgrade settlement with time as examples, the feasibility of using the practical method for creep to predict the long-term deformation of high-speed railway subgrade is demonstrated, and the relavant method to calculate the effective range of the prediction under certain errors is also given. It is shown that by using the practical method for creep, we can accurately predict the deformation based on the existing data, and also can get the early warning deformation of the railway for the future. It is of great significance to the safe operation management of high-speed railways.
引文
[1]王炳龙,周顺华,杨龙才.高速铁路软土路基工后沉降试验研究[J].同济大学学报(自然科学版),2003,31(10):1163-1167.(WANG Bing-long,ZHOU Shun-hua,YANGLong-cai.Experimental study on soft soil settlement of high-speed railway subgrade after construction[J].Journal of Tongji University,2003,31(10):1163-1167.(in Chinese))
[2]王其昌.高速铁路土木工程[M].成都:西南交通大学出版社,1999.(WANG Qi-chang.Civil Engineering on the high-speed railway[M].Chengdu:Southwest Jiaotong University Press,1999.(in Chinese))
[3]铁道第三勘察设计院.京沪高速铁路设计暂行规定[M].北京:中国铁道出版社,2003.(Railway Third Survey and Design Institute.Temporary design provisionsfor Jing-Hu high-speed railway[M].Beijing:China Railway Press,2003.(in Chinese))
[4]曹新文,蔡英,苏谦.高速铁路路基变形控制值的研究[J].路基工程,1998(2):38-41.(CAO Xin-wen,CAIYing,SU Qian.Research on the deformation control of high-speed railway subgrade[J].Subgrade Engineering,1998(2):38-41.(in Chinese))
[5]黄珏鑫.邻近堆载对深厚软土地区高速铁路桥梁桩基内力与变位影响分析[D].长沙:中南大学,2014.(HUANGYu-xin.Analysis of adjacent surcharge impact to the internal force and displacement of high-speed railway bridge pile foundation in deep soft soil[D].Changsha:Central South University,2014.(in Chinese))
[6]姚仰平,祁生钧,车力文.高填方地基工后沉降计算[J].水力发电学报,2016,35(3):1-10.(YAO Yang-ping,QISheng-Jun,CHE Li-wen.Computational method of post-construction settlement for high-fill embankments[J].Journal of Hydroelectric Engineering,2016,35(3):1-10.(in Chinese))
[7]姚仰平,车力文,祁生钧,等.高填方地基蠕变沉降计算方法研究[J].工业建筑,2016,46(9):25-31.(YAO Yang-ping,CHE Li-wen,QI Sheng-jun,et al.Study of creep settlement computation methods for high embankments[J].Industrial Construction,2016,46(9):25-31.(in Chinese))
[8]YAO Y P,HOU W,ZHOU A N.UH Model:Three-dimensional unified hardening model for over-consolidated clays[J].Géotechnique,2009,59(5):451-469.
[9]孔令明,罗汀,姚仰平.率相关本构模型的临界状态描述[J].岩土力学,2015,36(9):2442-2450.(KONGLing-ming,LUO Ting,YAO Yang-ping.Description of critical state for rate-dependent constitutive models[J].Rock and Soil Mechanics,2015,36(9):2442-2450.(in Chinese))
[10]胡晶,姚仰平.基于考虑时间效应UH模型的一维固结分析[J].北京航空航天大学学报,2015,41(8):1492-1498.(HU Jing,YAO Yang-ping.1D-consolidation analysis based on UH model considering time effect[J].Journal of Beijing University of Aeronautics and Astronautics,2015,41(8):1492-1498.(in Chinese))
[11]姚仰平,冯兴,黄祥,等.UH模型在有限元分析中的应用[J].岩土力学,2010,31(1):237-245.(YAO Yang-ping,FENG Xing,HUANG Xiang,et al.Application of UH model to finite element analysis[J].Rock and Soil Mechanics,2010,31(1):237-245.(in Chinese))
[12]费康.ABAQUS在岩土工程中的应用[M].北京:中国水利水电出版社,2010.(FEI Kang.Applications of ABAQUS in the geotechnical engineering[M].Beijing:China Water&Power Press,2010.(in Chinese))
[2]王其昌.高速铁路土木工程[M].成都:西南交通大学出版社,1999.(WANG Qi-chang.Civil Engineering on the high-speed railway[M].Chengdu:Southwest Jiaotong University Press,1999.(in Chinese))
[3]铁道第三勘察设计院.京沪高速铁路设计暂行规定[M].北京:中国铁道出版社,2003.(Railway Third Survey and Design Institute.Temporary design provisionsfor Jing-Hu high-speed railway[M].Beijing:China Railway Press,2003.(in Chinese))
[4]曹新文,蔡英,苏谦.高速铁路路基变形控制值的研究[J].路基工程,1998(2):38-41.(CAO Xin-wen,CAIYing,SU Qian.Research on the deformation control of high-speed railway subgrade[J].Subgrade Engineering,1998(2):38-41.(in Chinese))
[5]黄珏鑫.邻近堆载对深厚软土地区高速铁路桥梁桩基内力与变位影响分析[D].长沙:中南大学,2014.(HUANGYu-xin.Analysis of adjacent surcharge impact to the internal force and displacement of high-speed railway bridge pile foundation in deep soft soil[D].Changsha:Central South University,2014.(in Chinese))
[6]姚仰平,祁生钧,车力文.高填方地基工后沉降计算[J].水力发电学报,2016,35(3):1-10.(YAO Yang-ping,QISheng-Jun,CHE Li-wen.Computational method of post-construction settlement for high-fill embankments[J].Journal of Hydroelectric Engineering,2016,35(3):1-10.(in Chinese))
[7]姚仰平,车力文,祁生钧,等.高填方地基蠕变沉降计算方法研究[J].工业建筑,2016,46(9):25-31.(YAO Yang-ping,CHE Li-wen,QI Sheng-jun,et al.Study of creep settlement computation methods for high embankments[J].Industrial Construction,2016,46(9):25-31.(in Chinese))
[8]YAO Y P,HOU W,ZHOU A N.UH Model:Three-dimensional unified hardening model for over-consolidated clays[J].Géotechnique,2009,59(5):451-469.
[9]孔令明,罗汀,姚仰平.率相关本构模型的临界状态描述[J].岩土力学,2015,36(9):2442-2450.(KONGLing-ming,LUO Ting,YAO Yang-ping.Description of critical state for rate-dependent constitutive models[J].Rock and Soil Mechanics,2015,36(9):2442-2450.(in Chinese))
[10]胡晶,姚仰平.基于考虑时间效应UH模型的一维固结分析[J].北京航空航天大学学报,2015,41(8):1492-1498.(HU Jing,YAO Yang-ping.1D-consolidation analysis based on UH model considering time effect[J].Journal of Beijing University of Aeronautics and Astronautics,2015,41(8):1492-1498.(in Chinese))
[11]姚仰平,冯兴,黄祥,等.UH模型在有限元分析中的应用[J].岩土力学,2010,31(1):237-245.(YAO Yang-ping,FENG Xing,HUANG Xiang,et al.Application of UH model to finite element analysis[J].Rock and Soil Mechanics,2010,31(1):237-245.(in Chinese))
[12]费康.ABAQUS在岩土工程中的应用[M].北京:中国水利水电出版社,2010.(FEI Kang.Applications of ABAQUS in the geotechnical engineering[M].Beijing:China Water&Power Press,2010.(in Chinese))