随机地震荷载作用下高速铁路黄土路基震陷试验分析
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摘要
通过将郑西客运专线不同地段地震危险性分析中人工合成的地震波直接输入动三轴,对该客运专线不同地段原状黄土试样进行震陷试验,研究黄土在随机地震荷载作用下的震陷特性。根据震陷试验结果,利用黄土震陷试验预测方法对该客运专线黄土路基在未来地震中是否发生震陷进行判断,分别给出50 a超越概率10%和2%的震陷量预测结果。试验结果表明,HYCD,TGCD,LBCD三个场地的土属于震陷性黄土,震陷临界动应力在70 k Pa左右,这些场地应根据黄土震陷量的大小,采取合理、有效的地基抗震措施;而YSCD场地的土属于非震陷性黄土。研究区黄土在中、强地震作用下,震陷主要发生在Q3地层中。
In this paper,through the synthetic random seismic wave of seismic risk analysis in different sections of a passenger dedicated line was input dynamic triaxial apparatus, and taken seismic subsidence experiments on undisturbed loess for samples. The seismic subsidence characteristics of the undisturbed loess in different sections of the passenger dedicated line are studied. According to the seismic subsidence test results, prediction method based on loess seismic subsidence test is used to judge whether loess seismic subsidence will occurred on the loess subgrade of passenger dedicated lines in future earthquake. Moreover,the prediction results of 50 years beyond the probability of 10% and 2% are provided respectively. The results show that the loess in HYCD,TGCD and LBCD sites belongs to seismic subsidence loess. The critical dynamic stress for seismic subsidence is about 70 k Pa. The reasonable and effective foundation seismic measures should be taken,based on the size of the amount of loess seismic subsidence. While the loess from YSCD site belongs to non-seismic subsidence loess. Loess seismicsubsidence in the research area mainly occurred in the Q3 loess when moderate and strong earthquake occurred.
引文
[1]张振中,段汝文.黄土震陷研究与震害[J].西北地震学报,1987,9(增):63–69.(ZHANG Zhenzhong,DUAN Ruwen.Study on seismic subsidence and seismic hazards of loess[J].Northwest Seismological Journal,1987,9(Supp.):63–69.(in Chinese))
    [2]何光,朱鸿博.黄土震陷研究[J].岩土工程学报,1990,12(6):99–103.(HE Guang,ZHU Hongbo.Study on the loess seismic Subsidence[J].Chinese Journal of Geotechnical Engineering,1990,12(6):99–103.(in Chinese))
    [3]王峻,石玉成,王杰民,等.不同地震荷载作用下黄土震陷特性的对比分析[J].岩土工程学报,2011,33(增1):102–106.(WANG Jun,SHI Yucheng,WANG Jiemin,et al.Comparative analysis of characters of loess subsidence under different seismic loads[J].Chinese Journal of Geotechnical Engineering,2011,33(Supp.1):102–106.(in Chinese))
    [4]谢定义.试论我国黄土力学研究中的若干新趋向[J].岩土工程学报,2001,23(1):3–13.(XIE Dingyi.Exploration of some new tendencies of new research of loess[J].Chinese Journal of Geotechnical Engineering,2001,23(1):3–13.(in Chinese))
    [5]邓龙胜,范文.随机地震荷载作用下黄土震陷的影响因素研究[J].岩石力学与工程学报,2011,30(9):1 924–1 931.(DENG Longsheng,FAN Wen.Study of influencing factors of loess seismic subsidence induced by stochastic seismic load[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(9):1 924–1 931.(in Chinese))
    [6]翁效林,熊元克,裴凯.黄土震陷变形特征的离心模型试验研究[J].矿物学报,2006,26(4):460–464.(WENG Xiaolin,XIONG Yuanke,PEI Kai.Study on loess seismic subsidence deformation characteristics by centrifuge model test[J].Acta Mineralogica Sinica,2006,26(4):460–464.(in Chinese))
    [7]王峻,王兰民,李兰.永登5.8级地震中黄土震陷灾害的探讨[J].地震研究,2005,28(4):393–397.(WANG Jun,WANG Lanmin,LI Lan.Discussion on the loess subsidence disaster caused by the Yongdeng Ms 5.8 earthquake[J].Northwestern Seismological Journal,2005,28(4):393–397.(in Chinese))
    [8]钱征宇.郑西客运专线湿陷性黄土工程技术的新进展[J].铁道工程学报,2008,(增1):71–79.(QIAN Zhengyu.New processes of construction technology of collapsible loess for Zhengzhou—Xi'an passenger dedicated line[J].Journal of Railway Engineering Society,2008,(Supp.1):71–79.(in Chinese))
    [9]段汝文,张振中,李兰,等.黄土动力特性的进一步研究[J].西北地震学报,1990,12(3):72–78.(DUAN Ruwen,ZHANG Zhenzhong,LI Lan,et al.Further research on dynamic characteristics of loess[J].Northwestern Seismological Journal,1990,12(3):72–78.(in Chinese))
    [10]谷天峰,王家鼎,王峻.郑西客运专线黄土路基震陷研究[J].工程地质学报,2009,17(4):557–562.(GU Tianfeng,WANG Jiading,WANG Jun.Laboratory and numerical studies on seismic subsidence of loess subgrade a long Zhengzhou—Xi'an high-speed railway[J].Journal of Engineering Geology,2009,17(4):557–562.(in Chinese))
    [11]苏谦,刘昌清,李安洪,等.郑西客运专线深厚湿陷黄土地基DDC桩法分析及沉降计算研究[J].铁道标准设计,2006,(5):23–25.(SU Qian,LIU Changqing,LI Anhong,et al.Analysis on the DDC method and calculation of subsidence at the deep hick and wet subgrade in Zhengzhou—Xi'an passenger dedicated line[J].Railway Standard Design,2006,(5):23–25.(in Chinese))
    [12]邓龙胜,范文.地震荷载作用下黄土的动应力–应变关系研究[J].岩石力学与工程学报,2012,31(增1):3 174–3 180.(DENG Longsheng,FAN Wen.Study of dynamic stress-strain relationship of loess under seismic loading[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(Supp.1):3 174–3 180.(in Chinese))
    [13]巫志辉,方彦.原状黄土在增湿时的震陷特性[C]//全国第三届土动力学会议论文集.上海:同济大学出版社,1990:285–290.(WU Zhihui,FANG Yan.The characteristic of loess seismic collapse in environment of increasing moisture content[C]//Proceedings of the Memoir of the 3rd Soil Dynamics Congress.Shanghai:Tongji University Press,1990:285–290.(in Chinese))
    [14]王家鼎,袁中夏,任权.高速铁路地基黄土液化前后微观结构变化研究[J].西北大学学报:自然科学版,2009,39(3):480–483.(WANG Jiading,YUAN Zhongxia,REN Quan.A study on loess microstructure pre and post liquefaction of high-speed railway foundation[J].Journal of Northwest University:Natural Science,2009,39(3):480–483.(in Chinese))
    [15]王峻,王兰民,李兰.黄土场地震陷量的试验预测[J].西北地震学报,1997,19(2):62–66.(WANG Jun,WANG Lanmin,LI Lan.Laboratory prediction of seismic subsidence quantity on loess sites[J].Northwestern Seismological Journal,1997,19(2):62–66.(in Chinese))
    [16]王峻.黄土震陷试验与评价[J].甘肃科学学报,1999,11(1):6–9.(WANG Jun.The tests and evaluation for seismic subsidence of loess[J].Journal of Gansu Sciences,1999,11(1):6–9.(in Chinese))
    [17]栗润德,张鸿儒,白晓红,等.不同含水量下原状黄土动强度和震陷的试验研究[J].工程地质学报,2007,15(5):694–699.(LI Runde,ZHANG Hongru,BAI Xiaohong,et al.Dynamic shear strength and seismic subsidence of intact loess with different water contents from dynamic triaxial testing[J].Journal of Engineering Geology,2007,15(5):694–699.(in Chinese))
    [18]罗爱忠,邵生俊.湿载耦合作用下黄土结构性损伤演化及本构关系[J].岩石力学与工程学报,2012,31(4):841–847.(LUOAizhong,SHAO Shengjun.Structural damage evolution and constitutive relation of loess under coupling of stress and moisture[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(4):841–847.(in Chinese))
    [19]汪国烈.对湿陷性黄土场地地震作用工程影响的几点看法[J].西北地震学报,2007,29(1):96–98.(WANG Guolie.Some opinions on effect of engineering under earthquake action in site of collapsible loess[J].Northwestern Seismological Journal,2007,29(1):96–98.(in Chinese))
    [20]王峻,石玉成,王谦,等.天然含水率状态下原状黄土动强度特性研究[J].世界地震工程,2012,28(4):23–27.(WANG Jun,SHI Yucheng,WANG Qian,et al.Study on dynamic strength properties of undisturbed loess under nature moisture content[J].World Earthquake Engineering,2012,28(4):23–27.(in Chinese))
    [21]关亮,陈正汉,黄雪峰,等.非饱和填土(黄土)的湿化变形研究[J].岩石力学与工程学报,2011,30(8):1 698–1 704.(GUAN Liang,CHEN Zhenghan,HUANG Xuefeng,et al.Study of wetting deformation of unsaturated remolded loess[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(8):1 698–1 704.(in Chinese))

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