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1、BRITISH STANDARD BS 5911-103: 1994 Precast concrete pipes and ancillary concrete products Part 103: Specification for prestressed non-pressure pipes and fittings with flexible joints Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:35:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5911-10
2、3:1994 This British Standard, having been prepared under the direction of Technical Committee B/505, was published under the authority of the Standards Board and comes into effect on 15 September 1994 BSI 02-1999 The following BSI references relate to the work on this standard: Committee reference B
3、/505 Draft for comment 91/13931 DC ISBN 0 580 22513 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee B/505, Waste Water Engineering to Subcommittee B/505/9, Concrete Pipes, Fittings and Ancillary Concrete Products, upon
4、which the following bodies were represented: Association of Consulting Engineers British Precast Concrete Federation Ltd. Concrete Pipe Association Concrete Society County Surveyors Society Department of the Environment (Property Services Agency) Department of Transport Federation of Civil Engineeri
5、ng Contractors Institution of Civil Engineers Institution of Highways and Transportation Institution of Water and Environmental Management Pipe Jacking Association Water Services Association of England and Wales Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun shef
6、fieldun, na, Fri Dec 01 14:35:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5911-103:1994 BSI 02-1999i Contents Page Committees responsibleInside front cover Forewordiii Section 1. General 1.1Scope1 1.2References1 1.3Definitions1 Section 2. Materials 2.1Cement3 2.2Aggregates3 2.3Other concrete ma
7、terials3 2.4Concrete mix, casting and finish3 2.5Reinforcement5 Section 3. Dimensions and tolerances 3.1Nominal size and effective length6 3.2Internal manufacturing diameter and actual diameter7 3.3External manufacturing diameter7 3.4Variation in the thickness of core wall7 3.5Squareness of ends7 3.
8、6Deviation from straightness7 3.7Surface cracking7 3.8Joints7 3.9Bends7 3.10 Junctions8 3.11 Splays9 Section 4. Pipe design and manufacture 4.1Concrete core11 4.2Circumferential prestressing12 4.3Cover coat12 Section 5. Tests 5.1Tests13 5.2Test requirements14 Section 6. Inspection procedures and mar
9、king 6.1Type of inspection and batch size17 6.2Inspection procedures for pipes18 6.3Inspection procedures for bends and junctions20 6.4Marking20 Annex A (informative) Information to be supplied in an enquiry or order21 Annex B (normative) Methods of assessing surface finish21 Annex C (normative) Met
10、hods of assessment deviation from straightness22 Annex D (normative) Crushing strength test method for pipes23 Annex E (normative) Hydrostatic test method26 Annex F (normative) Methods of testing pipe joints for angular deflection, straight draw and shear26 Annex G (informative) Facilities for purch
11、asers27 Annex H (normative) Method of checking bonding of cement mortar coat and depth of cover27 Annex J (normative) Method of test for water absorption for core pipe concrete28 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:35:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5911-103:19
12、94 BSI 02-1999 Page Figure 1 Typical section of a prestressed concrete pipe with spigot and socket joint2 Figure 2 Effective length of pipes2 Figure 3 Typical bends8 Figure 4 Typical junctions9 Figure 5 Typical splay pipe10 Figure 6 Joint test measurements16 Figure B.1 Gauge for assessing surface ev
13、enness21 Figure B.2 Gauge for assessing surface voids22 Figure C.1 Gauge for measuring deviation from straightness23 Figure D.1 Testing arrangements for the crushing test25 Figure D.2 Dimensions of feeler gauge for inspecting cracks in prestressed units26 Figure F.1 Loading arrangement for shear tes
14、t on joints27 Table 1 Nominal sizes and tolerances for units6 Table 2 Rationalized metric nominal sizes of units7 Table 3 Minimum effective lengths and typical nominal angles of bend7 Table 4 Right-angled junctions9 Table 5 Oblique-angled junctions9 Table 6 Summary of test requirements and inspectio
15、n procedures13 Table 7 Crushing test loads15 Table 8 Minimum angular deflection and straight draw for joints16 Table 9 Maximum number of individual defectives in last 10 batches permitted for switching to reduced inspection (hydrostatic and works proof load crushing test)17 Table 10 Inspection plans
16、 for hydrostatic and works proof load crushing tests18 List of references30 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:35:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5911-103:1994 BSI 02-1999iii Foreword This Part of BS 5911, covering prestressed concrete pipes of the non-cylinde
17、r type, for the conveyance of water in non-pressure applications, has been prepared under the direction of Technical Committee B/505, Waste Water Engineering. The standard is one of the series of Parts of BS 5911, covering various types and applications of concrete pipes, and supersedes BS 5178:1975
18、 which is withdrawn. The foreword to BS 5178 stated that the desirability of including some form of test for initial surface absorption of the cement mortar cover coat had been considered, but had found that insufficient information was available to justify such an inclusion. The question was review
19、ed during the preparation of this standard, but, since the forthcoming draft European Standard (EN) for precast concrete pipes includes provisions for oxygen permeability testing, it was considered prudent to await the publication of that standard before deciding whether or not to insert similar req
20、uirements into this standard. As far as practicable, this Part of BS 5911 specifies performance requirements and tests similar to those specified in BS 5911-100, with the similar intention of ensuring that pipelines will carry sewage or surface water at atmospheric pressure without leaking, or suffe
21、ring structural damage. In order to reflect the forthcoming harmonized European Standard for precast pipes, this Part of BS 5911 provides for the manufacture and supply of units with rationalized metric sizes. For a purchasers enquiry or order to be fully understood, it is essential that the manufac
22、turer be given the information set out in Annex A. Annex G recommends facilities that are of assistance to purchasers. Product certification. Users of this British Standard are advised to consider the desirability of third party certification of product conformity with this British Standard based on
23、 testing and continuing surveillance, which may be coupled with assessment of a suppliers quality systems against the appropriate standard of the BS EN ISO 9000 series (formerly BS 5750). Enquiries as to the availability of third party certification schemes will be forwarded by BSI to the Associatio
24、n of Certification Bodies. If a third party certification scheme does not already exist, users should consider approaching an appropriate body from the list of Association members. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards a
25、re responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 30, an inside back cover and a back cover. This standar
26、d has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:35:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sh
27、effieldun, na, Fri Dec 01 14:35:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5911-103:1994 BSI 02-19991 Section 1. General 1.1 Scope This Part of BS 5911 specifies requirements and associated methods of test for prestressed concrete pipes, bends, junctions and splays with flexible joints intende
28、d to be used for the conveyance, under atmospheric pressure, of sewage and surface water, and for the construction of culverts. Requirements are given for materials, design and manufacture, dimensions, inspection procedures and marking. This standard does not include the structural or hydraulic desi
29、gn of the pipeline, its durability under unusual environmental conditions, or standards of workmanship and supervision during construction and operation. NOTEFor guidance on these topics, BS 8005-1 and BS 8010-2.7 should be consulted, and work on various European Standards is in hand. 1.2 References
30、 1.2.1 Normative references This Part of BS 5911 incorporates, by dated or undated reference, provisions from other publications. These normative references are made at the appropriate places in the text and the cited publications are listed on page 30. For a dated references, only the edition cited
31、 applies; any subsequent amendments to or revisions of the cited publication apply to this Part of BS 5911 only when incorporated in the reference by amendment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 1.2.2 Informative re
32、ferences This Part of BS 5911 refers to other publications that provide information or guidance. Editions of these publications current at the time of issue of this standard are listed on the inside back cover, but reference should be made to the latest editions. 1.3 Definitions For the purposes of
33、this Part of BS 5911 the following definitions apply. 1.3.1 unit a pipe (including splay), bend or junction 1.3.2 prestressed concrete pipe a concrete core pipe circumferentially prestressed to withstand design loads NOTEA typical section through a prestressed concrete pipe with spigot and socket jo
34、int is shown in Figure 1. 1.3.3 slurry coat a coat of cement and water sprayed over the concrete core pipe and circumferential prestressing wire before application of the cover coat 1.3.4 concrete core pipe a concrete pipe reinforced with non-tensioned steel, or longitudinally prestressed with prete
35、nsioned high tensile steel wire, or a combination of both, embedded in the concrete (see Figure 1) 1.3.5 cover coat a coat of cement mortar applied to the outside of a prestressed concrete pipe, to protect the circumferential prestressing wire (see Figure 1) 1.3.6 nominal size (DN) a numerical desig
36、nation of the bore of a unit, which is a convenient round number approximately equal to the internal diameter in millimetres 1.3.7 manufacturing diameter a diameter of a unit that a manufacturer seeks to achieve 1.3.8 actual diameter a diameter found by measurement 1.3.9 effective length the length
37、of a pipe measured as shown in Figure 2 1.3.10 reinforcement steel, other than stainless steel, within a unit so as to prestress or reinforce the concrete, or to locate steel for the latter purpose 1.3.11 batch the number of units of a particular specification produced under uniform conditions durin
38、g a given period by one particular process Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:35:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5911-103:1994 2 BSI 02-1999 Figure 1 Typical section of a prestressed concrete pipe with spigot and socket joint Figure 2 Effective length of pipes
39、 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:35:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5911-103:1994 BSI 02-19993 Section 2. Materials 2.1 Cement The cement shall either: a) be factory-produced by the cement manufacturer and conform to one of the following standards as approp
40、riate: or b) consist of a normal or special combination of cement conforming to BS 12 and ground granulated blastfurnace slag (g.g.b.s.) or p.f.a. in accordance with the following, to be included as part of the concrete mix by simultaneously combining them with the other concrete materials at the co
41、ncrete mixer: Where special combinations of cement conforming to BS 12 and g.g.b.s. or p.f.a. are to be used for additional resistance to sulfate attack (see note), the percentage by mass of the total cementitious content shall be in the ranges 70 % to 90 % or 25 % to 40 % respectively. In all cases
42、 where combinations of cement conforming to BS 12 and g.g.b.s or p.f.a. are used, the relevant proportion of g.g.b.s. or p.f.a. shall be fully documented in the production records. NOTEThe requirements specified in 2.4.1 for minimum cement content and maximum water/cement ratio ensure that any of th
43、e permitted cements or standard combinations of cement conforming to BS 12 and g.g.b.s. or p.f.a. provide resistance to sulfate attack equivalent to classes 1 and 2 of Table 6.1 of BS 8110-1:1985. Where resistance to either class 3 or class 4 conditions as specified in Table 6.1 of BS 8110-1:1985 is
44、 required, see 2.4.1. 2.2 Aggregates 2.2.1 General Aggregates shall consist of materials conforming to BS 882. NOTEThe manufacturer may modify the gradings to suit the manufacturing process (see clause 0 of BS 882:1992). 2.2.2 Mechanical properties The limiting values on the mechanical properties of
45、 coarse aggregates shall be either: a) a minimum 10 % fines value of 100 kN, when tested in accordance with BS 812-111; or b) a maximum aggregate impact value of 30 %, when tested in accordance with BS 812-112. When tested in accordance with BS 812-105.1, the flakiness index shall be not more than 3
46、5. 2.2.3 Nominal maximum size The nominal maximum size of aggregate shall not exceed the least of the following: a) 20 mm; b) the concrete cover of the steel in the core pipe. 2.3 Other concrete materials 2.3.1 Water Water shall be clean and free from harmful matter in such quantities as affect the
47、properties of the concrete in the plastic or hardened state, or of the steel embedded in the concrete. NOTE 1See Appendix A of BS 3148:1980. NOTE 2As a general rule, potable water, whether treated for distribution through the public supply or untreated, is suitable for making concrete. 2.3.2 Admixtu
48、res 2.3.2.1 Admixtures shall conform to BS 5075. NOTEAdmixtures should not impair the durability of the concrete, nor combine with the ingredients to form harmful compounds nor increase the risk of corrosion of reinforcement. 2.3.2.2 The chloride ion content of admixtures shall not exceed 2 % (m/m)
49、of the admixture nor 0.03 % (m/m) of the cement. 2.3.2.3 The following information shall be documented: a) the relevant production records; b) the admixture(s) used; c) the dosage rate of each admixture; d) the effect of under-dosing and over-dosing. 2.4 Concrete mix, casting and finish 2.4.1 Cement content (see 2.1) 2.4.1.1 Core pipe 2.4.1.1.1 The fully compacted concrete shall contain not less than 360 kg/m3 of cement (inclusive of any g.g.b.s. or p.f.a.) and shall have a water/cement ratio not greater than 0.45. Type of ceme
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