《BS EN 640-1995 Reinforced concrete pressure pipes and distributed reinforcement concrete.pdf》由会员分享，可在线阅读，更多相关《BS EN 640-1995 Reinforced concrete pressure pipes and distributed reinforcement concrete.pdf（18页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS EN 640:1995 Reinforced concrete pressure pipes and distributed reinforcement concrete pressure pipes (non-cylinder type), including joints and fittings The European Standard EN 640:1994 has the status of a British Standard BS EN 640:1995 This British Standard, having been prepare
2、d under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 May 1995 BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference B/504 Draft for comment 92/125
3、37 DC ISBN 0 580 24112 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee B/504, Water supply, upon which the following bodies were represented: Association of Consulting Engineers Association of Manufacturers of Domestic
4、Unvented Supply Systems Equipment (MODUSSE) British Bathroom Council British Foundry Association British Non-Ferrous Metals Federation British Plastics Federation British Plumbing Manufacturers Association Department of the Environment Department of the Environment (Drinking Water Inspectorate) Fibr
5、e Cement Manufacturers Association Limited Institute of Plumbing Institution of Water and Environmental Management Local Authority Organizations Scottish Association of Directors of Water and Sewerage Services Water Companies Association Water Research Centre Water Services Association of England an
6、d Wales The following bodies were also represented in the drafting of this standard, through subcommittees and panels: Association of Metropolitan Authorities British Precast Concrete Federation Ltd. Concrete Pipe Association Concrete Society Department of Transport Federation of Civil Engineering C
7、ontractors Institution of Civil Engineers Institution of Highways and Transportation Amendments issued since publication Amd. No.DateComments BS EN 640:1995 BSI 07-1999i Contents Page Committees responsible Inside front cover National foreword ii Foreword2 Text of EN 640 3 BS EN 640:1995 ii BSI 07-1
8、999 National foreword This British Standard has been prepared by Technical Committee B/504 and is the English language version of EN 640:1994 Reinforced concrete pressure pipes and distributed reinforcement concrete pressure pipes (non-cylinder type), including joints and fittings, published by the
9、European Committee for Standardization (CEN). EN 640 was published as a result of international discussion in which the UK took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct appl
10、ication. 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 and ii, the EN title page, pages 2 to 12 and a back cover. This standard has been updated (see copyright date)
11、 and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. ? EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 640 October 1994 ICS 23.040.10;23.040.40 Descriptors: Water pipelines, pressure pipes, potable water, water pipes, concrete tubes
12、, reinforced concrete, armatures, specifications, design, equipment specifications, dimensions, tests English version Reinforced concrete pressure pipes and distributed reinforcement concrete pressure pipes (non-cylinder type), including joints and fittings Tuyaux pression en bton arm et tuyaux pres
13、sion armature diffuse (sans me en tle), y compris joints et pices spciales Stahlbetondruckrohre und Betondruckrohre mit verteilter Bewehrung (ohne Blechmantel) einschliesslich Rohrverbindungen und Formstcken This European Standard was approved by CEN on 1994-10-26. CEN members are bound to comply wi
14、th the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretar
15、iat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
16、 versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Norm
17、alisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1994 Copyright reserved to CEN members Ref. No. EN 640:1994 E ? EN 640:1994 BSI 07-1999 2 Foreword This European Standard for concrete pipes is a standard which was prepared by WG 5, Concrete pipes, of
18、the Technical Committee CEN/TC 164, Water supply, the Secretariat of which is held by AFNOR. During preparation of this standard the provisional results already available of CEN/TC 164/WG 1, General requirements for external systems and components, and of CEN/TC 164/165/JWG 1, Structural design, wer
19、e considered. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 1995, and conflicting national standards shall be withdrawn at the latest by April 1995. In accordance with the common CEN/CENEL
20、EC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Page Foreword2 0Int
21、roduction3 1Scope3 2Materials 3 2.1Aggregates3 2.2Steel wire for distributed reinforcement pipes 3 3Design and fabrication of pipe 3 3.1General requirements 3 3.1.1 Wall thickness 3 3.2Design of pipe 3 3.2.1 General 3 3.2.2 Combined load design criteria 4 3.3Reinforcement4 3.3.1 Circumferential rein
22、forcement for reinforced concrete pipe 4 3.3.2 Circumferential reinforcement for distributed reinforcement pipe 4 3.3.3 Longitudinal reinforcement for reinforced concrete pipe 5 3.3.4 Longitudinal reinforcement for distributed reinforcement pipe 5 3.3.5 Longitudinal prestressing reinforcement 5 3.3.
23、6 Placement and cover to steel 5 3.4Concrete and mortar 5 3.4.1 Mix design 5 3.4.2 Concrete strength 5 4Factory testing 5 4.1Concrete tests 5 4.2Pipe tests 5 4.2.1 Hydrostatic pressure tests5 4.2.2 Crushing test for reinforced concrete pipe 5 4.2.3 Combined crushing and pressure test for distributed
24、 reinforcement pipe 6 4.2.4 Combined bending and pressure test for distributed reinforcement pipes 6 Annex A (informative) Typical design procedure 11 Figure 1 Crushing test 7 Figure 2 Combined crushing and pressure test for distributed reinforcement pipe 9 Figure 3 Combined bending and pressure tes
25、t for distributed reinforcement pipe 10 Figure A.1 Coefficient Fp 12 Table 1 Minimum wall thickness 4 Table 2 Reduction factors for V shaped support6 ? EN 640:1994 BSI 07-19993 0 Introduction The product1) which is in permanent or temporary contact with water, intended for human consumption, does no
26、t adversely affect the quality of the drinking water and does not contravene the CE Directives and EFTA Regulations on the quality of drinking water. This standard is to be used together with EN 639 (Common requirements). When the relevant EN dealing with general requirements, such as General requir
27、ements for external systems and components (CEN/TC 164/WG 1), Materials in contact with water (CEN/TC 164/WG 3) and Structural design (CEN/TC 164/165/JWG 1) are adopted, the current standard shall be revised, where appropriate, in order to ensure that these requirements comply with the relevant ENs.
28、 To the present standard, is attached: Annex A (informative): Typical design procedure. 1 Scope This European Standard covers the requirements and manufacture of circumferentially reinforced concrete pressure pipe, without steel cylinder and not circumferentially prestressed, with steel reinforcemen
29、t (RCP) or a homogeneously distributed reinforcement composed of multiple layers of small diameter wires (DRP). Pipes shall have diameter ranging from DN/ID 300 to DN/ID 4000. Larger sizes could be manufactured based on the concepts of this standard. This type of pipe is designed for the internal pr
30、essure, external loads, and bedding conditions designated by the purchaser. Maximum design pressure shall not exceed 500 kPa. The above limit shall be increased to 2 000 kPa in case of distributed reinforcement pipes (DRP). 2 Materials Materials are as specified in clause 5 of EN 639 (Common require
31、ments). Additional requirements are specified as follows. 2.1 Aggregates The maximum size of the aggregate shall not exceed one third of the pipe wall thickness, but in no case shall it exceed 32 mm. For distributed reinforcement pipes, the aggregate size shall not exceed the spacing between reinfor
32、cement steel wires and in no case shall exceed 4 mm. 2.2 Steel wire for distributed reinforcement pipes The wire to be used for distributed reinforcement shall conform to subclause 5.7 of EN 639 (Common requirements) and shall have a characteristic tensile strength of not less than 800 MPa and a tol
33、erance on the diameter of 0,04 mm. 3 Design and fabrication of pipe 3.1 General requirements Pipes shall have the following principal features: a reinforcing cage or cages of steel rods, bars, wire, or fabric encased in a dense concrete wall (RCP), or multiple layers of continuous thin steel wire he
34、lically wrapped and encased in a dense mortar wall (DRP). Where beam strength is required by design, the longitudinal reinforcement shall consist of steel bars or wires or layers of wire ribbon. Prestressing wire may also be used. Joints shall be provided with elastomeric sealing rings in accordance
35、 with 5.8 of EN 639. 3.1.1 Wall thickness Table 1 shows the minimum design wall thickness for each type of pipe. 3.2 Design of pipe 3.2.1 General Steel reinforcement shall consist of one or more circular cages, or a single elliptical cage, or a combination of an elliptical cage and one or more circu
36、lar cages or multiple layers of thin wire. At least one of the cages shall be circular in pipe for a design pressure of more than 150 kPa or in RCP larger than DN/ID 1800. An inner circular cage and an outer circular cage shall be used and may be combined with an elliptical cage in pipe for design p
37、ressures of more than 300 kPa. Circumferential and longitudinal reinforcement for DRP shall be placed in a minimum of six layers and two layers respectively. The cross-sectional area of the reinforcement shall be sufficient to meet the design requirements. 1)Should be considered as any product used
38、for the conveyance and distribution of water intended for human consumption. ? EN 640:1994 4 BSI 07-1999 Table 1 Minimum wall thickness 3.2.2 Combined load design criteria The pipe shall be designed to resist the stresses due to internal pressure, external loads and, if required, beam loading result
39、ing from each of the following conditions: a combination of maximum design pressure and dead loads; a combination of design pressure, dead loads, and live loads. For information, see informative annex. Dead and live loads, coefficients for moment and thrust calculations and bedding angle shall be ca
40、lculated in accordance with the appropriate national standards transposing EN as available or, in absence of such standards, with the appropriate regulations or recognized and accepted methods at the place where the pipeline is installed. 3.3 Reinforcement 3.3.1 Circumferential reinforcement for rei
41、nforced concrete pipe The circumferential reinforcement shall consist of steel bars or wire in helical or hoop form, or welded wire fabric shaped and lap welded or butt welded into cages. The weld quality and welding procedures shall be assured by testing a representative sample of butt or lap welds
42、 at a stress equal to at least the original strength of the steel. The elements composing the circumferential reinforcement shall be connected by longitudinal bars. The diameter and number of these bars shall be sufficient to prevent the cage deforming during fabrication and shall be suitable to giv
43、e the pipe the designed strength. For pipes having thickness less than 80 mm, the reinforcement shall normally be a single cage. For multiple cage reinforcement, the internal cage shall have at least 50 % of the circumferential steel area required by the design while the external cage shall have at
44、least 40 % of the required area. The maximum distance between two adjacent bars of the circumferential reinforcement shall not exceed 1,5 times the wall thickness but in no case greater than 150 mm. 3.3.2 Circumferential reinforcement for distributed reinforcement pipe For DRP the circumferential re
45、inforcement shall consist of layers of wire with diameter not greater than 2 mm in helical or hoop form homogeneously distributed in the pipe wall. For the above pipe the specific volume of reinforcement (as ratio between volume of reinforcing wire and total volume of pipe wall) shall not be less th
46、an 1 %. In each layer, the design spacing between adjacent wires shall not be less than 3 times the wire diameter and not more than twice the largest size of aggregate used; deviation from design spacing shall be accepted if, in a longitudinal section of the central part of the barrel, the following
47、 condition is met: five adjacent squares, having sides equal to the wall thickness, contain a total of at least 90 % of design number of wires. DN/IDMinimum design wall thickness for RCP mm Minimum design wall thickness for DRP mm 300 400 450 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 17
48、00 1800 1900 2000 2100 2200 2300 2400 2500 and larger 60 60 60 60 65 65 70 75 85 90 100 110 115 125 135 140 150 160 165 180 185 190 200 a 40 40 40 40 45 45 50 55 60 65 65 70 70 75 80 a a a a a a a a a aTo be supplied by manufacturer. ? EN 640:1994 BSI 07-19995 3.3.3 Longitudinal reinforcement for re
49、inforced concrete pipe The circumferential reinforcement in cages shall be accurately spaced and rigidly assembled by means of longitudinal bars securely attached so that it is maintained in proper shape and position during the casting of the pipe. Not less than four longitudinal bars shall be provided for each cage, and additional bars shall be provided as necessary so that the circumferential spacing between longitudinal bars shall not exceed 450 mm in any barrel cage. 3.3.4 L