LI Wei, ZHUANG Jianqi, WANG Ying. 2018: EXPERIMENTAL STUDY ON INFLUENCING FACTORS OF SHEAR STRENGTH OF SATURATED REMOLDED LOESS. JOURNAL OF ENGINEERING GEOLOGY, 26(3): 626-632. DOI: 10.13544/j.cnki.jeg.2017-214
    Citation: LI Wei, ZHUANG Jianqi, WANG Ying. 2018: EXPERIMENTAL STUDY ON INFLUENCING FACTORS OF SHEAR STRENGTH OF SATURATED REMOLDED LOESS. JOURNAL OF ENGINEERING GEOLOGY, 26(3): 626-632. DOI: 10.13544/j.cnki.jeg.2017-214

    EXPERIMENTAL STUDY ON INFLUENCING FACTORS OF SHEAR STRENGTH OF SATURATED REMOLDED LOESS

    • The saturated liquefaction failure of loess occurs frequently in the loess area due to heavy rainfall and irrigation, and induces loess landslide and brings huge economic loss to the local people. The shear strength of saturated loess is influenced by many factors. So saturation experiments of remolded loess of Malan loess in Dangchuan district are carried on the modified TFB-1 type triaxial apparatus of stress and strain controlled for unsaturated soil through the combination of hydraulic saturation and back pressure saturation. The saturated remolded soil samples are conducted on consolidated undrained test under the conditions of the confining pressure of 50 kPa, 100 kPa, 200 kPa and 400 kPa respectively, and the shear rate of 0.02 mm·min-1, 0.06 mm·min-1, 0.2 mm·min-1 and 0.4 mm·min-1 respectively. The influence of confining pressure and shear rate on the shear strength of saturated loess is discussed. The results show that the shear strength of the saturated remolded loess increases first and then decreases with the increase of shear rate under the same confining pressure. The shear strength of the saturated remolded loess is higher with the increase of confining pressure under the same shear rate. The total cohesion and the effective cohesion of the remolded loess increase first and then decrease with the shear rate under the same dry density. The total internal friction angle and the effective internal friction angle increase first and then decrease with the increase of shear rate. The study can provide a basis for loess landslide prediction and scope.
    • loading

    Catalog

      /

      DownLoad:  Full-Size Img  PowerPoint
      Return
      Return