1、 Reference numberISO/TS 17892-6:2004(E)ISO 2004TECHNICAL SPECIFICATION ISO/TS17892-6First edition2004-10-15Geotechnical investigation and testing Laboratory testing of soil Part 6: Fall cone test Reconnaissance et essais gotechniques Essais de sol au laboratoire Partie 6: Essai au cne Copyright Inte
2、rnational Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TS 17892-6:2004(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this
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7、22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2004 All rights reservedCopyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TS 178
8、92-6:2004(E) ISO 2004 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each memb
9、er body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Ele
10、ctrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adop
11、ted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. In other circumstances, particularly when there is an urgent market requirement for such documents, a techn
12、ical committee may decide to publish other types of normative document: an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in an ISO working group and is accepted for publication if it is approved by more than 50 % of the members of the parent committ
13、ee casting a vote; an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a vote. An ISO/PAS or ISO/TS is reviewed after three years with a view to d
14、eciding whether it should be confirmed for a further three years, revised to become an International Standard, or withdrawn. In the case of a confirmed ISO/PAS or ISO/TS, it is reviewed again after six years at which time it has to be either transposed into an International Standard or withdrawn. At
15、tention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO/TS 17892-6 was prepared by the European Committee for Standardization (CEN) in collaboration with T
16、echnical Committee ISO/TC 182, Geotechnics, Subcommittee SC 1, Geotechnical investigation and testing, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). Throughout the text of this document, read “.this European pre-Standard.“ to mean “.this Technical
17、Specification.“. ISO 17892 consists of the following parts, under the general title Geotechnical investigation and testing Laboratory testing of soil: Part 1: Determination of water content Part 2: Determination of density of fine-grained soil Part 3: Determination of particle density Pycnometer met
18、hod Part 4: Determination of particle size distribution Part 5: Incremental loading oedometer test Part 6: Fall cone test Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,
19、-,-ISO/TS 17892-6:2004(E) iv ISO 2004 All rights reserved Part 7: Unconfined compression test on fine-grained soil Part 8: Unconsolidated undrained triaxial test Part 9: Consolidated triaxial compression tests on water-saturated soil Part 10: Direct shear tests Part 11: Determination of permeability
20、 by constant and falling head Part 12: Determination of the Atterberg limits Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TS 17892-6:2004(E) ISO 2004 All rights
21、 reserved vPage Contents Foreword.vi 1 Scope 1 2 Normative references 1 3 Terms and definitions .1 4 Equipment 2 5 Test procedure.3 6 Test results.6 7 Test report 7 Bibliography8 Figures Figure 1 Example of a fall-cone 2 Figure 2 Fall-cone test on remoulded soil.4 Figure 3 Fall-cone test on undistur
22、bed soil 4 Tables Table 1 Set of fall-cones - typical masses and dimensions 2 Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TS 17892-6:2004(E) vi ISO 2004 All ri
23、ghts reservedForeword This document (CEN ISO/TS 17892-6:2004) has been prepared by Technical Committee CEN/TC 341 “Geotechnical investigation and testing”, the secretariat of which is held by DIN, in collaboration with Technical Committee ISO/TC 182 “Geotechnics”. According to the CEN/CENELEC Intern
24、al Regulations, the national standards organizations of the following countries are bound to announce this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherla
25、nds, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. CEN ISO/TS 17892 consists of the following parts, under the general title “Geotechnical investigation and testing Laboratory testing of soil”: Part 1: Determination of water content Part 2: Determinatio
26、n of density of fine-grained soil Part 3: Determination of particle density - Pycnometer method Part 4: Determination of particle size distribution Part 5: Incremental loading oedometer test Part 6: Fall cone test Part 7: Unconfined compression test on fine-grained soil Part 8: Unconsolidated undrai
27、ned triaxial test Part 9: Consolidated triaxial compression tests on water-saturated soil Part 10: Direct shear tests Part 11: Determination of permeability by constant and falling head Part 12: Determination of Atterberg limits Copyright International Organization for Standardization Reproduced by
28、IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TS 17892-6:2004(E) ISO 2004 All rights reserved viiIntroduction This document covers areas in the international field of geotechnical engineering never previously standardised. It is int
29、ended that this document presents broad good practice throughout the world and significant differences with national documents is not anticipated. It is based on international practice (see 1). Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for
30、ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TS 17892-6:2004(E) ISO 2004 All rights r
31、eserved 11 Scope This document 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 tow
32、ards 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 undistur
33、bed 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 r
34、efers 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
35、 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 volum
36、e of soil. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. prEN 1997-1, Eu
37、rocode 7 - Geotechnical design Part 1: General rules. prEN 1997-2, Eurocode 7 - Geotechnical design - Part 2: Ground investigation and testing 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 undrained shear strength cuthe shear strength of a
38、saturated fine grained soil determined in such a way that the soil remains undrained during the shearing process 3.2 fall-cone undrained shear strength cufcthe undrained shear strength determined using a fall-cone apparatus 3.3 undisturbed sample normally a sample of quality class 1 according to prE
39、N 1997-2 Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TS 17892-6:2004(E) 2 ISO 2004 All rights reserved4 Equipment 4.1 Cone apparatus 4.1.1 The apparatus shall
40、permit the cone to be held firmly initially and to be released instantaneously to fall freely in the vertical direction into the soil specimen. 4.1.2 The apparatus shall have a mechanism which allows the cone to be raised or lowered and adjusted in such way that the tip of the cone just touches the
41、surface of the specimen before the cone is released. 4.1.3 The cone apparatus shall be equipped with a scale or other read off unit with such grading and resolution that the depth of the cone penetration, which shall be within 5 mm to 20 mm, can be read off to a resolution of 0,1 mm after the releas
42、e of the cone. 4.2 Fall-cones 4.2.1 A set of cones with cone angles of 30 or 60 and masses covering the whole range of possible shear strengths shall be used. A typical set of four fall cones is given on Table 1. The 60 g/60 cone is shown in Figure 1 as a typical example of such a cone. Table 1 Set
43、of fall-cones - typical masses and dimensions Mass g 10 60 80 100 400 Tip angle 60 60 30 30 30 Key 1 index line 2 cone tip a is the deviation from the geometrical tip at manufacturing b is the maximum wear h is the height of the conical tip is the tip angle Figure 1 Example of a fall-cone 4.2.2 When
44、 readings are taken manually, there shall be a distinct index line at the top of each shaft which shall be clearly visible in the reading scale. 4.2.3 The cones shall be made of stainless material and have smooth polished surfaces with an average roughness Raof less than 0,8 m. Cones with obvious we
45、ar or scratches shall be replaced. 4.2.4 The masses of the cones, together with their shafts, shall be within 1 % of the nominal mass and the tip angles shall be within 0,2 of the nominal angles. 4.2.5 The deviation from the geometrical tip at manufacturing a shall be less than 0,1 mm. The maximum w
46、ear b shall be less than 0,3 mm. Copyright International Organization for Standardization Reproduced by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO/TS 17892-6:2004(E) ISO 2004 All rights reserved 3lightly with the tip of the finge
47、r when the tip is pushed through a hole (1,50 0,02) mm in diameter, drilled through a metal plate (1,75 0,1) mm thick for a 30 cone or a (1,0 0,1) mm thick metal plate for a 60 cone. 4.3 Ancillary apparatus The ancillary apparatus consists of the following: a) Sample tube for undisturbed soil specim
48、en or plane for extruded and/or trimmed test specimen; b) mixing cup; for remoulded specimen, a mixing cup shall be used with the rim parallel to the base. The cup shall be made of steel, porcelain or plastic, of cylindrical or semi-spherical shape, with a diameter greater than of 55 mm and depth of at least 30 mm; c) spatula; d) sample extruder; e) wire cutter. 5 Test procedure 5.1 Test specimen preparation 5.1.1 General 5.1.1.1 For determination of undrained shear strength of undisturbed soil, the samples shall be taken w
