李喜安, 黄润秋, 周健, 邓亚虹, 赵宁, 洪勃. 2014: 原状黄土三轴拉伸特性研究. 工程地质学报, 22(s1): 470-475. DOI: 10.13544/j.cnki.jeg.2014.s1.079
    引用本文: 李喜安, 黄润秋, 周健, 邓亚虹, 赵宁, 洪勃. 2014: 原状黄土三轴拉伸特性研究. 工程地质学报, 22(s1): 470-475. DOI: 10.13544/j.cnki.jeg.2014.s1.079
    Li Xi'an, Huang Runqiu, Zhou Jian, Deng Yahong, Zhao Ning, Hong Bo. 2014: RESEARCH ON CHARACTER OF UNDISTURBED LOESS BY TRIAXIAL TENSION TEST. JOURNAL OF ENGINEERING GEOLOGY, 22(s1): 470-475. DOI: 10.13544/j.cnki.jeg.2014.s1.079
    Citation: Li Xi'an, Huang Runqiu, Zhou Jian, Deng Yahong, Zhao Ning, Hong Bo. 2014: RESEARCH ON CHARACTER OF UNDISTURBED LOESS BY TRIAXIAL TENSION TEST. JOURNAL OF ENGINEERING GEOLOGY, 22(s1): 470-475. DOI: 10.13544/j.cnki.jeg.2014.s1.079

    原状黄土三轴拉伸特性研究

    RESEARCH ON CHARACTER OF UNDISTURBED LOESS BY TRIAXIAL TENSION TEST

    • 摘要: 土体的抗拉强度比抗剪和抗压强度小得多,因此人们在研究土体强度问题的时候往往忽略土的抗拉强度。考虑到土坝心墙、高大受拉建筑物、地裂缝及滑坡后缘裂缝等所造成的有些岩土工程问题均与土体抗拉强度有关,人们对其抗拉强度能力均提出了较高的要求。本文基于对常规三轴仪的一系列改造,对石碑塬滑坡原状黄土进行了不同围压不同含水率的固结不排水试验,以获取抗拉强度参数。在试验的基础上,得到了不同围压以及不同水率下的拉应力和应变关系,分析了抗拉强度随围压和含水率变化曲线,获取抗拉强度参数,借以优化黄土滑塌计算模型的材料参数取值。

       

      Abstract: The tensile strength of the soil is smaller than the shear and compressive strength. Mechanical properties of soil under tensile state is often ignored by people, but in dam core wall, tensile huge buildings, ground fissures and landslide trailing edge cracks caused by some geotechnical engineering problems, such as people on the tensile strength ability put forward higher requirements. This article is based on a series of transformation of conventional triaxial apparatus, made to the stele tableland landslide of undisturbed loess with different confining pressure and moisture content by consolidated undrained tests, to obtain tensile strength parameters. On the basis of experiment. Based on the experimental results, under different confining pressure and moisture content of the relationship between tensile stress and strain are analyzed, and the tensile strength as the confining pressure and moisture content change curve, tensile strength parameters, so as to optimize the loess slump material parameter selection of calculation model.

       

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