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滨海软黏土加速蠕变特性试验研究

雷华阳, 仇王维, 贺彩峰, 王学超

雷华阳, 仇王维, 贺彩峰, 王学超. 滨海软黏土加速蠕变特性试验研究[J]. 岩土工程学报, 2015, 37(1): 75-82. DOI: 10.11779/CJGE201501008
引用本文: 雷华阳, 仇王维, 贺彩峰, 王学超. 滨海软黏土加速蠕变特性试验研究[J]. 岩土工程学报, 2015, 37(1): 75-82. DOI: 10.11779/CJGE201501008
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LEI Hua-yang, QIU Wang-wei, HE Cai-feng, WANG Xue-chao. Triaxial tests on creep characteristics of coastal soft soils[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(1): 75-82. DOI: 10.11779/CJGE201501008
Citation: LEI Hua-yang, QIU Wang-wei, HE Cai-feng, WANG Xue-chao. Triaxial tests on creep characteristics of coastal soft soils[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(1): 75-82. DOI: 10.11779/CJGE201501008
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滨海软黏土加速蠕变特性试验研究  English Version

  • 1. 天津大学土木工程系,天津 300072; 2. 天津市土木工程结构及新材料重点实验室,天津 300072

基金项目: 国家自然科学基金项目（51279002,51478034）; 高等学校博士学科点专项科研基金博导类资助课题（20130009110021）
详细信息
    作者简介:

    雷华阳(1974- ),女,河北冀州人,博士,教授,博士生导师,主要从事岩土工程的教学与科研工作。E-mail: Leihuayang74@163.com。

  • 中图分类号: TU411

Triaxial tests on creep characteristics of coastal soft soils

  • 1. Department of Architectural Engineering, Tianjin University, Tianjin 300072, China; 2. Key Laboratory of Civil Engineering Structure and Safety Education Department on Littoral Area, Tianjin University, Tianjin 300072, China

摘要

    摘要
  • 摘要: 为了研究滨海软黏土加速蠕变特性,采用典型的滨海相软黏土进行室内蠕变和加速蠕变试验,研究不同围压、加荷比、振动频率、动应力比对软黏土蠕变特性的影响,并通过对比得出了不同试验条件下滨海软黏土的加速蠕变的变化规律。试验结果表明：滨海软黏土具有非线性应力-应变关系的流变特性,其蠕变试验曲线呈衰减型,蠕变变形大部分应变量发生在蠕变前期,变形随时间增长趋于一个定值;静载作用下,围压越大初始蠕变速率越大。初始加荷压力一致,加荷比越大破坏应力越小。循环动荷载作用下,应变在动荷载阶段变化缓慢,而动荷载结束后进入稳定阶段后应变发生突变,急剧变大最后趋于稳定;此外在不同振动频率和动应力比下试样承受荷载等级不同,均存在一个临界安全荷载,超过这个临界值试样会发生蠕变破坏现象。
    Abstract: To explore the creep properties of typical structural soft clay in the coastal area of Tianjin, a series of triaxial creep tests are carried out considering the factors such as confining pressure, loading ratio, frequency and so on. The stress-strain-time curves of coastal soft clay under different conditions are obtained. According to the comparison of indoor tests between the original soils and the soils under different experimental conditions, the accelerated creep properties are found. The results show that the coastal silt clay in Tianjin exhibits nonlinear rheological properties of stress-strain, and its creep curves are attenuated. The creep deformation mostly occurs in its early stage, and the deformation tends to be a constant value with the passage of time. Under static loads, the greater the confining pressure, the greater the initial creep rate. Under the same initial loading pressure, the failure stress decreases with the increase of the loading ratio. Under cyclic loads and the same experimental conditions, there exist a structural yield stress and a critical frequency. Once exceeding the two critical value, the phenomenon of creep failure will occur.
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    • 参考文献(12)
  • [1] 沈珠江. 软土工程特性和软土地基设计[J]. 岩土工程学报, 1998, 20(1): 156-162. (SHEN Zhu-jiang. Engineering properties of soft soils and design of soft ground[J]. Chinese Journal of Geotechnical Engineering, 1998, 20(1): 156-162. (in Chinese))
    [2] YASUHARA K, HIRAO K, HYODO M. Partial-drained behavior of clay under cyclic loading[C]// Proc 6th Int’1 Conf on Numerical Methods in Geomechanics. Rotterdam: Balkema, 1988: 659-664.
    [3] TARUMI N, SUNAGA M. Behaviours of low embankments on soft grounds during train passage[C]// Proc JSCF. 1988, (400/III-10): 1-11. (in Japanese)
    [4] 林永国, 廖少明, 刘国彬. 地铁隧道纵向变形影响因素的探讨[J]. 地下空间, 2000, 20(4): 264-267, 289. (LIN Yong-guo, LIAO Shao-ming, LIU Guo-bin. A discussion of the factors effecting on longitudinal deformation of subway tunnel[J]. Underground Space, 2000, 20(4): 264-267. (in Chinese))
    [5] LO K Y. The pore pressure-strain relationship of normally consolidated undisturbed clays[J]. Canadian Geotechnical Journal, 1969, 6: 383-412.
    [6] MARSUI T, ITO T, OHARA H. Cyclic stress-strain history and shear characteristics of clay[J]. Journal of Geotech Eng Div, ASCE, 1980, 106(10): 1101-1120.
    [7] HYODO M, HYDE A F L, YAMAMOTO Y, et al. Cyclic shear strength of undisturbed and remoulded marine clays[J]. Soils and Foundations, 1999, 39(2): 45-48.
    [8] 周建, 龚晓南, 李剑强. 循环荷载作用下饱和软黏土特性试验研究[J]. 工业建筑, 2000, 30(11): 43-47. (ZHOU Jian, GONG Xiao-nan, LI Jian-qiang. Experimental study of saturated soft clay under cyclic loading[J]. Industrial Construction, 2000, 30(11): 43-47. (in Chinese))
    [9] 唐益群, 黄雨, 叶为民. 地铁列车荷载作用下隧道周围土体的临界动应力比和动应变分析[J]. 岩石力学与工程学报, 2003, 22(9): 1566-1570. (TANG Yi-qun, HUANG Yu, YE Wei-min. Critical dynamic stress ratio and dynamic strain analysis of soils around the tunnel under subway train loading[J]. Chinese Journal of Rock Mechanics and Enigneering, 2003, 22(9): 1566-1570. (in Chinese))
    [10] 唐益群, 张曦, 叶为民, 等. 地铁列车振动荷载作用下土体的动力特性和动强度研究[J]. 工程地质学报, 2004, 12: 98-101. (TANG Yi-qun, ZHANG Xi, YE Wei-min, et al. A study on dynamic strength and dynamic stress-strain relation of silt soil under traffic loading[J]. Journal of Engineering Geology, 2004, 12: 98-101. (in Chinese))
    [11] 唐益群, 赵化, 王元东. 地铁荷载下隧道周围加固软黏土应变累积特性[J]. 同济大学学报（自然科学版）, 2011, 39(7): 972-977. (TANG Yi-qun, ZHAO Hua, WANG Yuan-dong. Characteristics of strain accumulation of reinforced soft clay around tunnel under subway vibration loading[J]. Journal of Tongji University (Nature Science), 2011, 39(7): 972-977. (in Chinese))
    [12] 张勇, 孔令伟, 郭爱国. 循环荷载下饱和软黏土的累积塑性应变试验研究[J]. 岩土力学, 2009, 3(6): 1542-1548. (ZHANG Yong, KONG Ling-wei, GUO Ai-guo. Cumulative plastic strain of saturated soft clay under cyclic loading[J]. Rock and Soil Mechanics, 2009, 3(6): 1542-1548. (in Chinese))
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出版历程
  • 收稿日期:  2014-03-11
  • 发布日期:  2015-01-19

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