原状黄土一维蠕变试验及蠕变模型
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P642

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陕西省交通运输厅科研项目(16-01K);陕西省自然科学基础研究计划重点项目(2020JZ-52);国家自然科学基金面上项目(51874229);国土资源部煤炭资源勘查与综合利用重点实验室开放课题(KF2020-5)


Study on one dimensional creep test and creep model of undisturbed loess
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    摘要:

    我国高速公路银百线陕西境段的控制性工程支党河特大桥经过黄土大沟壑地区,区内存在一大型HP15古滑坡体,从长期角度看可能对桥梁后期稳定性存在威胁,为防范措施的合理制定,需要研究黄土的长期蠕变特性。本文基于工程面临的实际难题,开展了HP15滑坡原状黄土在不同应力状态和含水率下的单轴蠕变特性实验,建立了基于Burgers模型的单因素、双因素元件蠕变模型,并通过实验数据曲线拟合的方式建立了考虑时间、含水率和应力状态的三因素经验蠕变模型,扩展了蠕变模型的适用范围,进一步提高了模型对实验黄土蠕变特性的表达,同时也为该黄土边坡的长期损伤防治提供实验基础和理论指导。

    Abstract:

    Zhidanghe super large bridge, a control project of Yinbai line in Shaanxi Province, passes through the loess gully area, where there is a large HP15 ancient landslide, which may threaten the stability of the bridge in the long term,in order to make reasonable preventive measures, it is necessary to study the long-term creep characteristics of loess.In this paper, based on the practical problems faced by the project, the uniaxial creep tests of intact loess of HP15 landslide under different stress states and water content are carried out,based on Burgers model, single factor and double factor creep models are established,a three factor empirical creep model considering time, moisture content and stress state is established by curve fitting of experimental data,the application scope of the creep model is extended, and the expression of the creep characteristics of the experimental loess is further improved, meanwhile, the experimental basis and theoretical guidance are provided for the long-term damage prevention of the loess slope.

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李昂,陈建博,孙兴华,等. 原状黄土一维蠕变试验及蠕变模型[J]. 科学技术与工程, 2021, 21(21): 8789-8796.
Li Aang, Chen Jianbo, Sun Xinghua, et al. Study on one dimensional creep test and creep model of undisturbed loess[J]. Science Technology and Engineering,2021,21(21):8789-8796.

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  • 收稿日期:2020-11-06
  • 最后修改日期:2021-06-30
  • 录用日期:2021-03-14
  • 在线发布日期: 2021-08-11
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