含泥砂砾石的强度特性

含泥砂砾石的强度特性 English Version

摘要: 本文根据大直剪试验资料对含泥砂砾石的强度特性作了初步探讨。认为:①莫尔强度包线是一条过原点的曲线,用指数方程式τ=Ap（σ/p）ⁿ表示较好;②含泥量对粗料含量不同的砂砾石强度影响的特征和大小不同;③不同性质的泥对粗料含量相同的砂砾石料强度影响的大小也不尽相同;④剪位移-时间过程线中的直线段的起点是值得注意的特征点。
- 含泥量 /
- 粗料 /
- 泥砂 /
- 砂砾石料 /
- 强度特性 /
- 强度影响 /
- 细料 /
- 垂直压力 /
- 强度包线 /
- 剪胀效应
Abstract: This paper is a preliminary study of strength characteristics of sand-gravel with different contents of fine particles （minus 0.lmm）, based upon the data obtained from large scale direct shear test. Some Conclusions in this paper are, （ 1 ）The Mohr's envelope is a curve passing through the origin and good enough to be expressed by exponential equation τ=Ap（σ/p） ; （ 2 ）The effects of fine particles contents on thestrength of Sand-gravel with different contents of coarse aggregates have diffreent characteristics and magnitude; （ 3 ）The effects of fine particles in different nature on the strength of sand-gravel even with same contents of coarse aggregates also have different magnitude; and （4）Graphs of shear displacement against time show that the starting point of straight line section is a characteristics point worth noticed.