ISO/TS 17892-2:2004 土工技术研究和试验 土壤的实验室试验-第2部分： 精耕土壤密度的测定

标准编号：ISO/TS 17892-2:2004

中文名称：土工技术研究和试验 土壤的实验室试验-第2部分： 精耕土壤密度的测定

英文名称：Geotechnical investigation and testing — Laboratory testing of soil — Part 2: Determination of density of fine-grained soil

发布日期：2004-10

标准范围

ISO/TS 17892-2:2004规定了根据prEN 1997-1和prEN 1997-2在岩土工程勘察范围内测定完整土壤或岩石体积密度和干密度的试验方法。土壤的体积密度有助于确定不同深度的原位覆盖层应力（地应力）。此外，体积密度和干密度可以通过技术文献中的经验关系定性地描述土壤的力学特性。这种关系只能用作指南，并应通过直接测量机械特性来补充。本文件描述了三种方法:a） 线性测量法；b） 浸水法；c） 流体置换法。线性测量方法适用于测定规则形状粘性土试样的密度，包括为其他试验准备的试样。所用试样通常为矩形棱柱体或直圆柱体。浸水法包括通过测量天然或压实土壤样品在空气中的质量和悬浮在水中时的表观质量来测定其体积密度和干密度。只要能获得合适尺寸的材料块，就可以使用该方法。流体置换法包括通过测量浸没后水或其他适当流体的质量和位移来测定土壤样本的体积密度和干密度。只要能获得合适尺寸的材料块，就可以使用该方法。

ISO/TS 17892-2:2004 specifies methods of test for the determination of the bulk and dry density of intact soil or rock within the scope of the geotechnical investigations according to prEN 1997-1 and prEN 1997-2.The bulk density of a soil is useful in the determination of the in-situ overburden stresses at various depth (geostatic stresses). Furthermore, bulk and dry density can qualitatively describe the mechanical characteristics of a soil via empirical relationships which are to be found in the technical literature. Such relationships should be used only as guidelines and should be supplemented by direct measurements of the mechanical characteristics.This document describes three methods:a) linear measurements method;b) immersion in water method;c) fluid displacement method.The linear measurement method is suitable for the determination of the density of a specimen of cohesive soil of regular shape, including specimens prepared for other tests. The specimens used are normally in the form of either rectangular prisms or straight cylinders.The immersion in water method covers the determination of the bulk density and dry density of a specimen of natural or compacted soil by measuring its mass in air and its apparent mass when suspended in water. The method is employable whenever lumps of material of suitable size can be obtained.The fluid displacement method covers the determination of the bulk density and dry density of a specimen of soil by measuring mass and displacement of water or other appropriate fluid after immersion. The method is employable whenever lumps of material of suitable size can be obtained.

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