應力主軸變化對黃泛區(qū)粉質(zhì)土各向異性特性的影響

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中圖分類號：TU441 文獻標志碼：A 文章編號：2096-6717（2025）03-0001-11

Influence of stress principal axis variation on anisotropic behavior of silty soil in the Yellow River flood area

ZENG Changnv'，MA Yuan1，YIN Hang1，GU Heτ ，WANG Yuke2 （1.CollegeofCivilEngineering，Henan UniversityofTechnology，Zhengzhou 450ool，P.R.China；2.Collegeof Water Conservancy and Civil Engineering，Zhengzhou University， Zhengzhou 45Ooo1，P.R.China）

Abstract：Aseries of hollowcylinder torsion shear tests wereconducted for the silty soil in the Yelow River flood area，considering the effect of drainage shearing with major large principal stress direction.The shear stress-strain behavioras wellas the anisotropic characteristics of silty soil were investigated.Under difrent intermediate principal stress coeficients b and major principal stress direction angles α ，the stress-strain relationship and the corrsponding shear stress ratio of silty soil were obtained.It was concluded that the values of α and b have a significant efect on the octahedral stress-strain and the shear stress-major principal strain. The obvious anisotropicic behavior was observed，especially under b=0.5 or1.O.Compressed deformation generally occurred in the major principal strain direction.Under a fixed α ，the smaller shear strength occurred under a larger b value.The peak shear strength and the corresponding axial strain were the greatest under the conditions of α=45° and b=0.5 ， relevant with to the highest peak shear stress ratio qf/p0 ：

Keywords： silty soil;anisotropy； stress-strain relationship；rotation of principal stressaxis；failure strength

黃泛區(qū)大量基礎設施分布在粉土地基之上，該地區(qū)粉土具有高分散性、低黏結(jié)性和弱可塑性的特點，難以壓實且水穩(wěn)性較差，給當?shù)鼗A設施的修建與維護帶來極大困擾。（剩余16176字）