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利用原位控制冻结法所取得的原状砂,通过具不同结构特性的原状和重塑样试验结果的比较研究了原状结构对饱和砂土动力变形特性的影响。文中首先探讨引起破土结构改变的各因素对小应变下最大剪切模量G_(max)的影响、G_(max)及c、n、m反映原状结构的可能性;然后探讨原状结构性对大应变下排水和不排水试验中的G/G_(max)与γ及G/G_(max)与γ/γ_r关系曲线的影响;以及排水体变和不排水孔压对试验结果的影响。
The original sand obtained by in-situ controlled freezing method was used to study the effect of the original structure on the dynamic deformation characteristics of saturated sand by comparison of the original and remodeling test results with different structural characteristics. In this paper, we first discuss the influence of various factors that cause changes in soil structure on the maximum shear modulus G_(max) under small strain, G_(max) and c, n, m reflect the possibility of the original structure; then explore the structure of the original structure to large The effects of G/G_(max) and γ and G/G_(max) vs. γ/γ_r on the strain in drainage and undrained tests; and the influence of displacement and undrained pore pressures on the test results.