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TRIAXIAL TEST STUDY ON WETTING INFLUENCE ON SHEAR STRENGTH OF COARSE-GRAINED MATERIALS

机译：润湿对粗粒材料抗剪强度影响的三轴试验研究

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摘要

Wetting influence on shear strength of coarse-grained materials is significant in earth-rockfill dam engineering. With a new apparatus for holding constant stress state in triaxial wetting test, the triaxial tests of coarse-grained material are carried out in the states of dry, saturation and wetting. The peak strengths under different confining pressures are obtained. The results indicate shear strength in wetting state is lower than that in dry state. The cohesion reduces more than 25%, but the friction angle changes very little. The shear strength of soil after wetting is basically equal to the value of saturated state and will not change under different wetting stress level. The sequence of dry and wet during wetting test has little influence to the peak strength. The conclusions and rationality are analyzed from the angle of soil wetting deformation characteristics and shear strength theory.
机译：湿润对粗粒料抗剪强度的影响在土石坝工程中很重要。使用一种在三轴润湿测试中保持恒定应力状态的新设备，可以在干燥，饱和和润湿状态下进行粗晶粒材料的三轴测试。获得了不同围压下的峰值强度。结果表明，润湿状态的剪切强度低于干燥状态的剪切强度。内聚力降低超过25％，但摩擦角变化很小。润湿后土壤的剪切强度基本上等于饱和状态的值，并且在不同的润湿应力水平下不会改变。润湿测试期间的干湿顺序对峰值强度影响很小。从土壤湿润变形特性和抗剪强度理论的角度分析了结论和合理性。

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  • 会议地点 Nanjing(CN)
  • 作者

    Li Keyun; rnLiu Kexin; rnHe Lingling;

  • 作者单位

    WEI SONG@School of Civil and Hydraulic Engineering,HeFei University of Technology,Tunxi Road Hefei,Anhui,P.R.China--ZHU JUNGAO@Institute of Geotechnical Research,Hohai University,Xikang Road Nanjing,Jiangsu,P.R.China--LI FAN@School of Civil and Hydraulic Engineering,HeFei University of Technology,Tunxi Road Hefei,Anhui,P.R.China--ZHU DAYONG@School of Civil and Hydraulic Engineering,HeFei University of Technology,Tunxi Road Hefei,Anhui,P.R.China--;

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