1、DRAFT FOR DEVELOPMENT DD CEN ISO/TS 22476-11:2005 Geotechnical investigation and testing Field testing Part 11: Flat dilatometer test ICS 93.020 DD CEN ISO/TS 22476-11:2005 This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 31 May 2006 BSI
2、2006 ISBN 0 580 48402 5 National foreword This Draft for Development reproduces verbatim CEN ISO/TS 22476-11:2005. This publication is not to be regarded as a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature because the new editi
3、on of the international document has been issued as a Technical Specification. It should be applied on this provisional basis, so that information and experience of its practical application may be obtained. Comments arising from the use of this Draft for Development are requested so that UK experie
4、nce can be reported to the international organization responsible for the Technical Specification. A review of this publication will be initiated not later than 3 years after its publication by the international organization so that a decision can be taken on its status at the end of its 3-year life
5、. Notification of the start of the review period will be made in an announcement in the appropriate issue of Update Standards. According to the replies received by the end of the review period, the responsible BSI Committee will decide whether to support the conversion into an international standard
6、, to extend the life of the Technical Specification for another 3 years or to withdraw it. Comments should be sent in writing to the Secretary of BSI Subcommittee B/526/3, Site investigation and ground testing, at British Standards House, 389 Chiswick High Road, London W4 4AL, giving the document re
7、ference and clause number and proposing, where possible, an appropriate revision of the text. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this do
8、cument may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contrac
9、t. Users are responsible for its correct application. Summary of pages This document comprises a front cover, an inside front cover, the CEN ISO/TS title page, the CEN ISO/TS foreword page, the ISO/TS title page, pages ii to vi, pages 1 to 9 and a back cover. The BSI copyright notice displayed in th
10、is document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsTECHNICALSPECIFICATION SPCIFICATIONTECHNIQUE TECHNISCHESPEZIFIKATION CENISO/TS2247611 May2005 ICS93.020 Englishversion GeotechnicalinvestigationandtestingFieldtestingPart11: Flatdilatom
11、etertest(ISO2247611:2005) ReconnaissanceetessaisgotechniquesEssaisenplace Partie11:Essaiaudilatomtreplat(ISO2247611:2005) GeotechnischeErkundungundUntersuchung FelduntersuchungenTeil11:Flachdilatometerversuch (ISO2247611:2005) ThisTechnicalSpecification(CEN/TS)wasapprovedbyCENon23August2004forprovis
12、ionalapplication. TheperiodofvalidityofthisCEN/TSislimitedinitiallytothreeyears.AftertwoyearsthemembersofCENwillberequested tosubmittheir comments,particularlyonthequestionwhethertheCEN/TScanbeconvertedintoaEuropeanStandard. CENmembersarerequiredtoannouncetheexistenceofthisCEN/TSinthesamewayasforanE
13、NandtomaketheCEN/TSavailable promptlyatnationallevelinanappropriateform.Itispermissibletokeepconflictingnationalstandardsinforce(inparall eltotheCEN/TS) untilthefinaldecisionaboutthepossibleconversionoftheCEN/TSintoanENisreached. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechR
14、epublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFR
15、NORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2005CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.CENISO/TS2247611:2005:E Foreword This document (CEN ISO/TS 22476-11:2005) has been prepared by Technical Committee CEN/TC 341 “Geotechnical Inve
16、stigation and Testing“, the secretariat of which is held by DIN, in collaboration with Technical Committee ISO/TC 182 “Geotechnics“. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this CEN Technical Specificati
17、on: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. CEN ISO/TS 22476-11:2005
18、 Reference number ISO/TS 22476-11:2005(E)TECHNICAL SPECIFICATION ISO/TS 22476-11 First edition 2005-05-15 Geotechnical investigation and testing Field testing Part 11: Flat dilatometer test Reconnaissance et essais gotechniques Essais en place Partie 11: Essai au dilatomtre plat CEN ISO/TS 22476-11:
19、2005ii CEN ISO/TS 22476-11:2005 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 member body in
20、terested 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 Electrotechni
21、cal 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 adopted by the
22、 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 technical commi
23、ttee 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 committee casting
24、 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 in order to decide whether
25、 it will be confirmed for a further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an International Standard or be withdrawn. Attention i
26、s 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 22476-11 was prepared by Technical Committee ISO/TC 182, Geotechnics, Subcommittee SC 1, Geotechnical inv
27、estigation and testing. ISO/TS 22476 consists of the following parts, under the general title Geotechnical investigation and testing Field testing: Part 1: Electrical cone and piezocone penetration tests Part 2: Dynamic probing Part 3: Standard penetration test Part 4: Mnard pressuremeter test Part
28、5: Flexible dilatometer test Part 6: Self-boring pressuremeter test Part 7: Borehole jack test Part 8: Full displacement pressuremeter test Part 9: Field vane test Part 10: Weight sounding test Part 11: Flat dilatometer test Part 12: Mechanical cone penetration test Part 13: Plate loading test CEN I
29、SO/TS 22476-11:2005 iv Contents Page Foreword . v Introductionvi 1 Scope1 2 Normative references 1 3 Terms and definitions .1 4 Equipment 3 4.1 Dilatometer equipment .3 4.2 Insertion apparatus . 5 5 Test procedure. 5 5.1 Calibration and checks .5 5.2 Membrane calibration procedure.6 5.3 Performing t
30、he test6 6 Test results 7 7 Report . 7 7.1 Field report.7 7.2 Test report 7 Bibliography 9 vForeword This document CEN ISO/TS 22476-11:2004 has been prepared by Technical Committee CEN/TC 341 “Geotechnical investigation and testing”, the secretariat of which is held by DIN, in collaboration with Tec
31、hnical Committee ISO/TC 182 “Geotechnics”. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this Technical Specification: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary Icela
32、nd, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. EN ISO 22476 Geotechnical investigation and testing - Field testing has the following parts: Part 1: Electrical cone and piezocone penetration tests Part 2: Dynamic prob
33、ing Part 3: Standard penetration test Part 4: Mnard pressuremeter test Part 5: Flexible dilatometer test Part 6: Self-boring pressuremeter test (TS) 1) Part 7: Borehole jack test Part 8: Full displacement pressuremeter test (TS)1) Part 9: Field vane test Part 10: Weight sounding test (TS) 1 ) Part 1
34、1: Flat dilatometer test (TS) 1) Part 12: Mechanical cone penetration test Part 13: Plate loading test. 1)TS Technical Specification.CEN ISO/TS 22476-11:2005vi Introduction The flat dilatometer test covers the determination of the in situ strength and deformation properties of fine grained soils usi
35、ng a blade shaped probe having a thin circular steel membrane mounted flush on one face. Results of flat dilatometer tests are mostly to obtain information on soil stratigraphy, in situ state of stress, deformation properties and shear strength. The basis of the test consists of inserting vertically
36、 into the soil a bladeshaped steel probe with a thin expandable circular steel membrane mounted flush on one face and determining, at selected depths or in a semi-continuous manner, the contact pressure exerted by the soil against the membrane when the membrane is flush with the blade and subsequent
37、ly the pressure exerted when the central displacement of the membane reaches 1,10 mm. The flat dilatometer test is most appropriate in clays, silts and sands where particles are small compared to the size of the membrane. CEN ISO/TS 22476-11:200511 Scope This Technical Specification comprises requir
38、ements for ground investigations by means of the flat dilatometer test (DMT) as part of the geotechnical investigation services according to prEN 1997-1 and prEN 1997-2. 2 Normative references Not applicable. 3 Terms and definitions For the purposes of this Technical Specification, the following ter
39、ms and definitions apply 3.1 dilatometer blade (dilatometer probe) blade shaped steel probe that is inserted into the soil to run a flat dilatometer test 3.2 membrane circular steel membrane that is mounted flush on one face of the blade and is expanded when applying a gas pressure at its back 3.3 s
40、witch mechanism apparatus housed inside the blade, behind the membrane, capable of activating and disconnecting an electric contact which in turn sets on and off an audio and/or visual signal when the membrane expands and reaches two preset deflections equal to 0,05 mm and 1,10 mm respectively 3.4 p
41、neumatic-electric cable cable that connects the control unit to the blade, delivers gas pressure at the back of the membrane, and provides electric continuity between the control unit and the switch mechanism 3.5 control and calibration unit set of suitable devices capable of supplying gas pressure
42、to the back of the membrane and measuring the pressure when the switch mechanism activates and disconnects the electric contact behind the membrane 3.6 earth wire wire connecting the control unit to the earth 3.7 pressure source pressurized gas tank filled with any dry nonflammable and noncorrosive
43、gas 3.8 membrane calibration procedure to determine the membrane calibration pressure equal to the suction and the pressure that is applied in air to the back of the membrane to retract its centre to 0,05 mm expansion or to expand it to 1,10 mm respectively CEN ISO/TS 22476-11:20052 3.9 dilatometer
44、profiling execution of a sequence of dilatometer tests from the same station at ground level along a vertical direction at closely spaced intervals with depth increments ranging between 150 mm and 300 mm 3.10 A-pressure pressure (P A ) that is applied to the back of the membrane to expand its centre
45、 0,05 mm in soil 3.11 B-pressure pressure (P B ) that is applied to the back of the membrane to expand its centre 1,10 mm in soil 3.12 A-membrane-calibration-pressure suction, (p A ) recorded as a positive value, that must be applied to the back of the membrane to retract its centre to the 0,05 mm d
46、eflection in air 3.13 B-membrane-calibration-pressure pressure (p B ) that must be applied to the back of the membrane to expand its centre to the 1,10 mm deflection in air 3.14 p A; avg and p B;avgaveraged values of the membrane calibration pressure obtained from the respective values of P Aand P B
47、measured before and after each dilatometer profiling or single dilatometer test 3.15 Z m - pressure gauge pressure deviation from zero when venting the blade to atmospheric pressure 3.16 soil pressure p 0 soil pressure against the membrane when it is flush with the blade (e.g. at zero expansion), se
48、e Figure 1 NOTE The term “contact pressure“ is also used. 3.17 soil pressure p 1soil pressure against the membrane when its centre is expanded 1,10 mm (see Figure 1) 3.18 in situ pore water pressure prior to blade insertion u 0 in situ pore water pressure prior to blade insertion at the elevation of the centre of the membrane 3.19 in situ effective vertical stress vo vertical stress prior to blade insertion at the elevation of th
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