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首页> 外文期刊>Geotechnical testing journal >A New Slurry-Based Method of Preparation of Hollow Cylinder Specimens of Clean and Silty Sands
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A New Slurry-Based Method of Preparation of Hollow Cylinder Specimens of Clean and Silty Sands

机译：一种基于浆液的清洁粉质砂空心圆柱试样的制备方法

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摘要

Given that hollow cylinder testing of undisturbed sand samples is virtually impossible to carry out, a new slurry deposition method is described in this study that allows reconstitution of uniform, saturated hollow cylinder specimens of clean and silty sands deposited under water. A novel gradient density mold was designed to demonstrate the uniformity of hollow cylindrical specimens prepared with the proposed method. Based on the results of 40 hollow cylinder tests and six uniformity tests on clean and silty sand specimens, the proposed method is shown to yield uniform hollow cylinder specimens in terms of relative density and silt content that have a high initial degree of saturation and that can be easily saturated using conventional back-pressure saturation procedures. Specimens prepared with the proposed method present very repeat-able stress-strain responses during anisotropic consolidation and drained principal stress rotation.
机译：鉴于实际上不可能进行未受扰动的砂样品的空心圆柱体测试，因此在本研究中描述了一种新的泥浆沉积方法，该方法可以重构均匀的饱和空心圆柱体标本，这些空心圆柱体样本沉积在水下。设计了一种新型的梯度密度模具，以演示用所提出的方法制备的空心圆柱试样的均匀性。根据40个空心圆柱体测试结果和6个均质性测试结果，表明该方法可在相对密度和淤泥含量方面产生均一的空心圆柱体样品，其初始饱和度高，并且可以使用常规的背压饱和程序很容易饱和。用提出的方法制备的试样在各向异性固结和排水主应力旋转过程中表现出非常可重复的应力应变响应。

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