ISO/TS 22476-10:2005 土工调查和检验.现场检验.第10部分：重力探测试验

标准编号：ISO/TS 22476-10:2005

中文名称：土工调查和检验.现场检验.第10部分：重力探测试验

英文名称：Geotechnical investigation and testing — Field testing — Part 10: Weight sounding test

发布日期：2005-05

标准范围

ISO/TS 22476-10:2005规定了根据EN 1997-1和EN 1997-2确定岩土工程勘察范围内土壤有效抗剪强度参数的实验室试验方法。试验方法包括将试样放置在直剪装置中，施加预先确定的法向应力，提供试样排水（和润湿，如果需要），或两者兼而有之，在法向应力下加固试样，解锁固定试样的框架，以恒定的剪切变形速率使一个框架相对于另一个框架水平位移，并测量剪切力，以及剪切试样时的水平位移。剪切应足够缓慢，以允许多余的孔隙压力通过排水消散，从而使有效应力等于总应力。直接剪切试验在土方工程和地基工程中用于确定土体的有效抗剪强度。

ISO/TS 22476-10:2005 specifies laboratory test methods to establish the effective shear strength parameter for soils within the scope of the geotechnical investigations according to EN 1997-1 and EN 1997-2.The test method consists of placing the test specimen in the direct shear device, applying a pre-determined normal stress, providing for draining (and wetting if required) of the test specimen, or both, consolidating the specimen under normal stress, unlocking the frames that hold the specimen, and displacing one frame horizontally with respect to the other at a constant rate of shear-deformation and measuring the shearing force, and horizontal displacements as the specimen is sheared. Shearing is applied slowly enough to allow excess pore pressures to dissipate by drainage so that effective stresses are equal to total stresses.Direct shear tests are used in earthworks and foundation engineering for the determination of the effective shear strength of soils.

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