列车间歇荷载作用下路基细粒土填料的塑性变形行为及临界动应力研究

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摘要铁路路基承受的列车长期荷载作用为列车通过时的振动加载和无列车通过时的加载间歇，即间歇性动荷载。为探究列车间歇性动荷载作用下路基填料的塑性变形行为及临界动应力，设计一系列考虑含水率、围压、动应力条件等因素的连续加载与加载–停振的动三轴试验，对比分析加载间歇对路基土变形行为的影响，并重点分析间歇加载条件下路基土的塑性变形行为。试验结果表明，试样在间歇阶段的排水和卸载使得加载阶段积累的超孔隙水压力消散、土体内部颗粒及结构发生调整，降低了塑性变形在后续加载阶段的累积，并提高了试样的临界动应力；间歇加载条件下粉土的塑性变形行为可划分为塑性安定、塑性蠕变和增量破坏；基于塑性应变速率，建立间歇加载条件下粉土变形行为的划分标准；引入静强度对安定理论进行修正，提出考虑含水率和围压等因素的间歇加载条件下粉土临界动应力经验公式。研究结果对于认识实际运营条件下路基的变形行为及动力稳定性具有重要意义。

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	聂如松1
	2
	李亚峰1
	冷伍明1
	2
	孙宝莉1
	刘婞1
	陈梦凡1

关键词 ：土力学, 动三轴试验, 列车间歇荷载, 细粒土填料, 塑性变形行为, 临界动应力, 安定理论

Abstract：The dynamic loading of the trains on the subgrade includes the cyclic loading stage and the intermittent stage，that is，an intermittent dynamic loading. To study the plastic deformation behavior and the critical dynamic stress of the subgrade filler under the intermittent loading of trains，a series of continuous and continuous-stopping repeated load triaxial tests under different water contents，confining pressures and dynamic stress levels were conducted，and the influence of the loading intermittence on the deformation characteristics of the silt filler and the plastic deformation behavior under intermittent loading were analyzed. The test results indicate that due to the unloading and drainage in the intermittent stage，the excess pore water pressure accumulated in the loading stage dissipates in the intermittent stage and the particles and the structure of the soil were also adjusted，reducing the accumulation of the plastic strain in subsequent loading stages，and increasing the critical dynamic stress of the sample. The plastic deformation behavior of the silt filler under the intermittent loading can be classified as plastic shakedown，plastic creep and incremental collapse. Based on the plastic strain rate，a criterion for classifying the plastic deformation behaviors of silt under intermittent loading was established. By introducing the static strength，an empirical formula of the critical dynamic stress of silt under intermittent loading，considering the water content and the confining pressure，was proposed. The research results are of great significance for understanding the deformation behavior and dynamic stability of the subgrade under the actual railway operation conditions.

Key words： soil mechanics dynamic triaxial test intermittent loading of trains fine-grained soil plastic deformation behavior critical dynamic stress shakedown theory

引用本文:

聂如松1，2，李亚峰1，冷伍明1，2，孙宝莉1，刘婞1，陈梦凡1. 列车间歇荷载作用下路基细粒土填料的塑性变形行为及临界动应力研究[J]. 岩石力学与工程学报, 2021, 40(4): 828-841.
NIE Rusong1，2，LI Yafeng1，LENG Wuming1，2，SUN Baoli1，LIU Xing1，CHEN Mengfan1. Plastic deformation and critical dynamic stress of fine-grained soils under intermittent loading of trains. , 2021, 40(4): 828-841.

链接本文:

http://rockmech.whrsm.ac.cn/CN/Y2021/V40/I4/828

[35]	DAWSON A R，WELLNER F. Plastic behavior of granular materials[C]// Final Report ARC Project 933. [S. l.]：[s. n.]，1999：147-156.
[1]	LENG W M，XIAO Y J，NIE R S，et al. Investigating strength and deformation characteristics of heavy-haul railway embankment materials using large-scale undrained cyclic triaxial tests[J]. International Journal of Geomechanics，2017，17(9)：04017074.
[3]	ZHAI B，LENG W M，XU F，et al. Critical dynamic stress and shakedown limit criterion of coarse-grained subgrade soil[J]. Transportation Geotechnics，2021.(to be Pressed)
[5]	CERNI G，CARDONE F，VIRGILI A，et al. Characterisation of permanent deformation behaviour of unbound granular materials under repeated triaxial loading[J]. Construction and Building Materials，2012，28(1)：79-87.
[8]	冷伍明，周文权，聂如松，等. 重载铁路粗粒土填料动力特性及积累变形分析[J]. 岩土力学，2016，37(3)：728-736.(LENG Wuming，ZHOU Wenquan，NIE Rusong，et al. Analysis of dynamic characteristics and accumulative deformation of coarse-grained soil filling of heavy-haul railway[J]. Rock and Soil Mechanics，2016，37(3)：728-736.(in Chinese))
[9]	CHEN C，ZHOU Z，KONG L，et al. Undrained dynamic behaviour of peaty organic soil under long-term cyclic loading，Part I：Experimental investigation[J]. Soil Dynamics and Earthquake Engineering，2018，107：279-291.
[11]	TANG L，YAN M H，LING X Z，et al. Dynamic behaviours of railway’s base course materials subjected to long- term low-level cyclic loading：experimental study and empirical model[J]. Geotechnique，2017，67(6)：537-545.
[13]	王淑云，鲁晓兵，赵京，等. 粉质黏土周期荷载后的不排水强度衰化特性[J]. 岩土力学，2009，30(10)：2 991-2 995.(WANG Shuyun，LU Xiaobing，ZHAO Jing，et al. Post-cyclic loading undrained strength degradation characteristics of silty clay[J]. Rock and Soil Mechanics，2009，30(10)：2 991-2 995.(in Chinese))
[15]	刘添俊，葛修润，安关峰. 单向循环荷载作用下饱和软黏土的性状研究[J]. 岩石力学与工程学报，2012，31(增1)：3 345-3 351.(LIU Tianjun，GE Xiurun，AN Guanfeng. Study of characteristics of saturated soft clay under uniaxial cyclic load[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(Supp.1)：3 345-3 351.(in Chinese))
[19]	NAZZAL M D，MOHAMMAD L N，AUSTIN A. Evaluation of the shakedown behavior of unbound granular base materials[J]. Geo-Frontiers，2011：4 752-4 761.
[6]	RAHMAN M S，ERLINGSSON S. Predicting permanent deformation behaviour of unbound granular materials[J]. International Journal of Pavement Engineering，2015，16(7)：587-601.
[16]	RAYMOND G E，GASKIN P N，ADDO-ABEDI F Y. Repeated compressive loading of Leda clay[J]. Canadian Geotechnical Journal，1979，16(1)：1-10.
[26]	YILDIRIM H，ERSAN H. Settlements under consecutive series of cyclic loading[J]. Soil Dynamics and Earthquake Engineering，2007，27(6)：577-585.
[29]	何绍衡，郑晴晴，夏唐代，等. 考虑时间间歇效应的地铁列车荷载下海相软土长期动力特性试验研究[J]. 岩石力学与工程学报，2019，38(2)：353-364.(HE Shaoheng，ZHENG Qingqing，XIA Tangdai，et al. Experimental on long-term dynamic characteristics of marine soft soil under metro train load considering time intermittent effect[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(2)：353-364.(in Chinese))
[36]	KOLISOJA P. Large scale dynamic triaxial tests III[Ph. D. Thesis][D]. Tampere：Tampere University of Technology，1998.
[7]	黄博，丁浩，陈云敏. 高速列车荷载作用的动三轴试验模拟[J]. 岩土工程学报，2011，33(2)：195-202.(HUANG Bo，DING Hao，CHEN Yunmin. Simulation of high-speed train load by dynamic triaxial tests[J]. Chinese Journal of Geotechnical Engineering，2011，33(2)：195-202.(in Chinese))
[17]	SHARP R. Shakedown analyses and the design of pavement under moving surface load[Ph. D. Thesis][D]. Sydney：University of Sydney，1983.
[27]	王军，蔡袁强，郭林，等. 分阶段循环加载条件下温州饱和软黏土孔压和应变发展规律[J]. 岩土工程学报，2012，34(7)：1 349-1 354.(WANG Jun，CAI Yuanqiang，GUO Lin，et al. Pore pressure and strain development of Wenzhou saturated soft soil under cyclic loading by stages [J]. Chinese Journal of Geotechnical Engineering，2012，34(7)：1 349-1 354.(in Chinese))
[37]	BROWN S F，LASHINE A K F，HYDE A F L. Repeated load triaxial testing of silty clay[J]. Géotechnique，1975，25(1)：95-114.
[4]	XU F，ZHAI B，LENG W M，et al. Probabilistic method for evaluating the permanent strain of unbound granular materials under cyclic traffic loading[J]. Construction and Building Materials，2020，251：118975.
[14]	丁建宇，王朝亮，杜运国，等. 排水条件下阶段性循环荷载作用对饱和软黏土动力特性影响[J]. 世界地震工程，2017，33(2)：161-168.(DING Jianyu，WANG Chaoliang，DU Yunguo，et al. Influence of staged cyclic loading on dynamic behavior of saturated soft clay under drained condition[J]. World Earthquake Engineering，2017，33(2)：161-168.(in Chinese))
[24]	MAMOU A，POWRIE W，PRIEST J，et al. The effects of drainage on the behaviour of railway track foundation materials during cyclic loading[J]. Géotechnique，2017：1-10.
[34]	谢定义. 土动力学[M]. 北京：高等教育出版社，2011：105-110.(XIE Dingyi. Soil dynamics[M]. Beijing：Higher Education Press，2011：105-110.(in Chinese))
[2]	XIAO Y J，ZHENG K Y，CHEN L X，et al. Shakedown analysis of cyclic plastic deformation characteristics of unbound granular materials under moving wheel loads[J]. Construction and Building Materials，2018，167：457-472.
[12]	SALOUR F，ERLINGSSON S. Permanent deformation characteristics of silty sand subgrades from multistage RLT tests[J]. International Journal of Pavement Engineering，2015：1-11.
[22]	GU F，ZHANG Y，LUO X，et al. Characterization and prediction of permanent deformation properties of unbound granular materials for Pavement ME Design[J]. Construction and Building Materials，2017，155：584-592.
[32]	李子春. 轨道结构垂向荷载传递与路基附加动应力特性的研究[博士学位论文][D]. 北京：铁道部科学研究院，2000.(LI Zichun. Study on the vertical load transmision through the track structure and the characteristics of subgrade dynamic stress[Ph. D. Thesis][D]. Beijing：China Academy of Railway Sciences，2000.(in Chinese))
[10]	WANG J，LING X，LI Q，et al. Accumulated permanent strain and critical dynamic stress of frozen silty clay under cyclic loading[J]. Cold Regions Science and Technology，2018，15：130-143.
[20]	PÉREZ I，GALLEGO J. Rutting prediction of a granular material for base layers of low-traffic roads[J]. Construction and Building Materials，2010，24(3)：340-345.
[30]	朔黄铁路编写领导小组. 朔黄铁路[M]. 北京：中国铁道出版社，2008：445-446.(Shuohuang Railway Preparation Leading Group. Shuohuang railway[M]. Beijing：China Railway Publishing House，2008：445-446.(in Chinese))
[18]	WERKMEISTER S. Permanent deformation behavior of unbound granular materials in pavement constructions[Ph. D. Thesis][D]. Dresden：Dresden University of Technology，2003.
[21]	PÉREZ I，MEDINA L，ROMANA M G. Permanent deformation models for a granular material used in road pavements[J]. Construction and Building Materials，2006，20 (9)：790-800.
[23]	SAKAI A，SAMANG L，MIURA N. Partially-drained cyclic behavior and its application to the settlement of a low embankment road on silty-clay[J]. Soils and Foundations，2003，43(1)：33-46.
[25]	INDRARATNA B，SINGH M，NGUYEN T T，et al. A laboratory study on subgrade fluidization under undrained cyclic triaxial loading[J]. Canadian Geotechnical Journal，2021.(to be Pressed)
[28]	NIE R S，LI Y F，LENG W M，et al. Deformation characteristics of fine-grained soil under cyclic loading with intermittence[J]. Acta Geotechnica，2020，15(11)：3 041-3 054.
[31]	中华人民共和国国家标准编写组. TB 10001―2016 铁路路基设计规范[S]. 北京：中国铁道出版社，2016.(The National Standards Compilation Group of People¢s Republic of China. TB 10001—2016 Code for design of railway subgrade[S]. Beijing：China Railway Publishing House，2016.(in Chinese))
[33]	聂如松，梅慧浩，冷伍明，等. 重载铁路过渡段路基动力响应特性试验研究[J]. 土木工程学报，2019，52(5)：101-115.(NIE Rusong，MEI Huihao，LENG Wuming，et al. Experimental research on dynamic response characteristics of transition subgrade induced by heavy-haul trains[J]. China Civil Engineering Journal，2019，52(5)：101-115.(in Chinese))
[38]	LI D，SELIG E T. Cumulative plastic deformation for fine-grained subgrade soils[J]. Journal of Geotechnical Engineering，1996，122(12)：1 006-1 013.