ISO/TS 17892-6:2004 土工技术研究和试验 土壤的实验室试验-第6部分： 落锥试验
标准编号：ISO/TS 17892-6:2004
中文名称：土工技术研究和试验 土壤的实验室试验-第6部分： 落锥试验
英文名称：Geotechnical investigation and testing — Laboratory testing of soil — Part 6: Fall cone test
发布日期：2004-10
标准范围
ISO/TS 17892-6:2004规定了用落锤测定饱和细粒粘性土原状和重塑试样的不排水抗剪强度。本文件规定了落锥试验，在该试验中，允许锥体尖端朝着土壤样本落下，然后测量锥体在土壤中的穿透力。根据本试验进行的试验可用于估算不排水抗剪强度的屈服贯入值。本试验适用于原状土和重塑土试样。对于原状土试样，试验结果取决于试样的质量。由于各向异性的可能影响，它也可能因关系所指的不排水抗剪强度而不同。“原状”土壤不排水抗剪强度的评估值是指其在实验室试验期间的状态。该值不一定表示土壤在现场自然状态下的不排水抗剪强度。因此，该测试应被视为一项指标测试。注1:对于非均质土壤样品，该方法得出的不排水抗剪强度值，与涉及更大体积土壤的其他试验相比，不排水抗剪强度值对样品的整体抗剪强度不太具有代表性。注2:对于扰动土样和裂隙土样，该方法通常比涉及更大体积土壤的试验产生更高的强度值。
ISO/TS 17892-6:2004 specifies the laboratory determination of undrained shear strength of both undisturbed and remoulded specimen of saturated fine grained cohesive soils by use of a fall-cone.This document specifies the fall-cone test, in which a cone is allowed to fall with its tip towards a soil specimen, whereupon the penetration of the cone into the soil is measured. Tests performed according to this test yield penetration values which can be used to estimate the undrained shear strength.The test is applicable to both undisturbed and remoulded soil test specimen.For undisturbed soil test specimen, the results of the test are dependent on the quality of the specimen. Because of possible effects of anisotropy, it can also differ depending on what undrained shear strength the relation refers to.The evaluated value of the undrained shear strength of the 'undisturbed' soil refers to its state during the test in the laboratory. This value is not necessarily indicative of the undrained shear strength of the soil in its natural state in the field. Therefore, the test should be regarded as an index test.NOTE 1 For non-homogeneous soil samples, this method yields values of the undrained shear strength which are less representative for the bulk shear strength of the sample than other tests involving a larger volume of soil.NOTE 2 For disturbed soil samples and fissured soil samples this method normally yields higher strength values than tests involving a larger volume of soil.
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