1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 22282-2:2012Geotechnical investigation and testing Geohydraulic testingPart 2: Water permeability tests in a borehole using open systemsBS EN ISO 22282-2:2012 BRITISH S
2、TANDARDNational forewordThis British Standard is the UK implementation of EN ISO 22282-2:2012. Together with parts 1, 3, 4, 5, and 6 of BS EN ISO 22282, it partially supersedes BS 5930:1999+A2:2010,which is currently being revised in order to remove conflicting material.In the meantime, where confli
3、ct arises between these documents, theprovisions of BS EN ISO 22282-2:2012 take precedence.The test given in this standard is included in BS 5930:1999+A2:2010(Clause 25.4), and conflicting parts are now withdrawn.The UK participation in its preparation was entrusted by Technical Committee B/526, Geo
4、technics, to Subcommittee B/526/3,Site investigation and ground testing.A list of organizations represented on this subcommittee can beobtained on request to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct ap
5、plication. The British Standards Institution 2012.Published by BSI Standards Limited 2012.ISBN 978 0 580 76151 5ICS 91.010.30; 93.020Compliance with a British Standard cannot confer immunityfrom legal obligations.This British Standard was published under the authority of theStandards Policy and Stra
6、tegy Committee on 31 October 2012.Amendments/corrigenda issued since publicationDate Text affected EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 22282-2 June 2012 ICS 93.020 English Version Geotechnical investigation and testing - Geohydraulic testing - Part 2: Water permeability tests in
7、 a borehole using open systems (ISO 22282-2:2012) Reconnaissance et essais gotechniques - Essais gohydrauliques - Partie 2: Essais de permabilit leau dans un forage en tube ouvert (ISO 22282-2:2012) Geotechnische Erkundung und Untersuchung - Geohydraulische Versuche - Teil 2: Wasserdurchlssigkeitsve
8、rsuche in einem Bohrloch unter Anwendung offener Systeme (ISO 22282-2:2012) This European Standard was approved by CEN on 31 May 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national s
9、tandard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version i
10、n any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
11、Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMI
12、T EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 22282-2:2012: EBS EN ISO 22282-2:2012 EN ISO 22282-2:2012 (E) 3
13、 Foreword This document (EN ISO 22282-2:2012) has been prepared by Technical Committee CEN/TC 341 “Geotechnical Investigation and Testing“, the secretariat of which is held by ELOT, in collaboration with Technical Committee ISO/TC 182 “Geotechnics“. This European Standard shall be given the status o
14、f a national standard, either by publication of an identical text or by endorsement, at the latest by December 2012, and conflicting national standards shall be withdrawn at the latest by December 2012. Attention is drawn to the possibility that some of the elements of this document may be the subje
15、ct of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bul
16、garia, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN ISO
17、 22282-2:2012ISO 22282-2:2012(E) ISO 2012 All rights reserved iiiContents PageForeword iv1 Scope 12 Normative references . 13 Terms, definitions and symbols 13.1 Terms and definitions . 13.2 Symbols . 14 Test principle 25 Equipment . 26 Test procedure . 36.1 Preparation of a test section 36.2 Conduc
18、ting the test 97 Test results 107.1 Constant flow rate test method .107.2 Variable head test method 107.3 Constant head test method 118 Reports . 118.1 Field report 118.2 Test report .12Annex A (informative) Example of record of measured values and test results .13Annex B (informative) Interpretatio
19、n of test results 14Bibliography .27BS EN ISO 22282-2:2012ISO 22282-2:2012(E)ForewordISO (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
20、technical committees. Each member 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 clo
21、sely with the International Electrotechnical 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
22、 International Standards adopted 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.Attention is drawn to the possibility that some of the elements of this documen
23、t may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 22282-2 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 341, Geotechnical investigation and testing, in collaboration with Technical
24、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).ISO 22282 consists of the following parts, under the general title Geotechnical investigation and testing Geo
25、hydraulic testing: Part 1: General rules Part 2: Water permeability tests in a borehole using open systems Part 3: Water pressure tests in rock Part 4: Pumping tests Part 5: Infiltrometer tests Part 6: Water permeability tests in a borehole using closed systemsiv ISO 2012 All rights reservedBS EN IS
26、O 22282-2:2012ISO 22282-2:2012(E)ForewordISO (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 inter
27、ested 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 Electrotechnical
28、 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 tech
29、nical 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.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO s
30、hall not be held responsible for identifying any or all such patent rights.ISO 22282-2 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 341, Geotechnical investigation and testing, in collaboration with Technical Committee ISO/TC 182, Geotechnics, Subcommit
31、tee SC 1, Geotechnical investigation and testing, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).ISO 22282 consists of the following parts, under the general title Geotechnical investigation and testing Geohydraulic testing: Part 1: General rules Par
32、t 2: Water permeability tests in a borehole using open systems Part 3: Water pressure tests in rock Part 4: Pumping tests Part 5: Infiltrometer tests Part 6: Water permeability tests in a borehole using closed systemsiv ISO 2012 All rights reservedBS EN ISO 22282-2:2012INTERNATIONAL STANDARD ISO 222
33、82-2:2012(E)Geotechnical investigation and testing Geohydraulic testing Part 2: Water permeability tests in a borehole using open systems1 ScopeThis part of ISO 22282 specifies requirements for the determination of the local permeability in soils and rocks below and above groundwater level in an ope
34、n hole by water permeability tests as part of the geotechnical investigation services according to EN 1997-1 and EN 1997-2.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undate
35、d references, the latest edition of the referenced document (including any amendments) applies.ISO 14688-1, Geotechnical investigation and testing Identification and classification of soil Part 1: Identification and descriptionISO 14689-1, Geotechnical investigation and testing Identification and cl
36、assification of rock Part 1: Identification and descriptionISO 22282-1: 2011, Geotechnical investigation and testing Geohydraulic testing Part 1: General rulesISO 22475-1, Geotechnical investigation and testing Sampling methods and groundwater measurements Part 1: Technical principles for execution3
37、 Terms, definitions and symbols3.1 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 22475-1 and ISO 22282-1 apply.3.2 SymbolsFor the purposes of this document, the symbols given in Table 1 apply. ISO 2012 All rights reserved 1BS EN ISO 22282-2:2012ISO 22
38、282-2:2012(E)Table 1 SymbolsSymbol Designation UnitAcarea of the inner cross-section of the casing m2Ararea of the water surface in the reservoir m2D borehole diameter, diameter of the test section mF shape factor mh hydraulic head of the test mh1, h2, h3applied hydraulic heads mhodistance of the wa
39、ter level from the ground level mh change in hydraulic head mk permeability coefficient m/skfsfield saturated permeability coefficient m/sL length (height) of the test section mQ flow rate m3/sr radius S storage coefficient T transmissivity titime needed to reach the equilibrium st time stotime at s
40、tart of test sVvolume flow rate4 Test principleThe test is based on the assumption that the test section is isolated and located above or below the groundwater surface.The results can vary depending on the test type chosen (water withdrawal or injection) according to the purpose of the test. Three t
41、est methods are available:a) Constant flow rate test method (suitable for k-value greater than 106m/s)This test consists of producing a change in hydraulic head in a section of a borehole by injecting or withdrawing a constant flow rate. The change in hydraulic head is measured against time.b) Varia
42、ble head test method (suitable for k-value between 106m/s and 109m/s)This test consists of producing an instant change in hydraulic head in a section of a borehole. The change in hydraulic head is measured against time.c) Constant head test method (suitable for k-value between 104m/s and 107m/s)This
43、 test consists of maintaining a constant hydraulic head in a section of a borehole. The flow rate is measured against time.5 EquipmentIn addition to a casing or a piezometer, the following equipment is necessary:a) water supply or plain rod for the falling head test;2 ISO 2012 All rights reservedBS
44、EN ISO 22282-2:2012ISO 22282-2:2012(E)Table 1 SymbolsSymbol Designation UnitAcarea of the inner cross-section of the casing m2Ararea of the water surface in the reservoir m2D borehole diameter, diameter of the test section mF shape factor mh hydraulic head of the test mh1, h2, h3applied hydraulic he
45、ads mhodistance of the water level from the ground level mh change in hydraulic head mk permeability coefficient m/skfsfield saturated permeability coefficient m/sL length (height) of the test section mQ flow rate m3/sr radius S storage coefficient T transmissivity titime needed to reach the equilib
46、rium st time stotime at start of test sVvolume flow rate4 Test principleThe test is based on the assumption that the test section is isolated and located above or below the groundwater surface.The results can vary depending on the test type chosen (water withdrawal or injection) according to the pur
47、pose of the test. Three test methods are available:a) Constant flow rate test method (suitable for k-value greater than 106m/s)This test consists of producing a change in hydraulic head in a section of a borehole by injecting or withdrawing a constant flow rate. The change in hydraulic head is measu
48、red against time.b) Variable head test method (suitable for k-value between 106m/s and 109m/s)This test consists of producing an instant change in hydraulic head in a section of a borehole. The change in hydraulic head is measured against time.c) Constant head test method (suitable for k-value betwe
49、en 104m/s and 107m/s)This test consists of maintaining a constant hydraulic head in a section of a borehole. The flow rate is measured against time.5 EquipmentIn addition to a casing or a piezometer, the following equipment is necessary:a) water supply or plain rod for the falling head test;2 ISO 2012 All rights reservedBS EN ISO 22282-2:2012ISO 22282-2:2012(E)b) pump or bail system for the rising head test;c) device to determine the flow rate with an accuracy of 5 % of the mea
