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1、BRITISH STANDARD BS 8005-5: 1990 Sewerage Part 5: Guide to rehabilitation of sewers Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:10:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8005-5:1990 This British Standard, having been prepared under the direction
2、 of the Civil Engineering and Building Structures Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 28 October 1990 BSI 02-1999 The following BSI references relate to the work on this standard: Committee reference SEB/43, formerly CSB/5 Draft
3、for comment 89/10491 DC ISBN 0 580 18928 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Civil Engineering and Building Structures Standards Policy Committee (CSB/-) to Technical Committee CSB/5, upon which the following bodies were re
4、presented: Association of Consulting Engineers Association of County Councils Association of District Councils British Ceramic Research Ltd. British Coal British Plastics Federation British Precast Concrete Federation Ltd. British Tunnelling Society Clay Pipe Development Association Limited Concrete
5、 Pipe Association Construction Industry Research and Information Association Convention of Scottish Local Authorities County Surveyors Society Department of the Environment (Property Services Agency) Department of Transport (Highways) Federation of Civil Engineering Contractors Fibre Cement Manufact
6、urers Association Limited Health and Safety Executive Hydraulic Research Station Ltd. Institute of Water Pollution Control Institution of Civil Engineers Institution of Environmental Health Officers Institution of Public Health Engineers Institution of Structural Engineers Institution of Water Engin
7、eers and Scientists Royal Institute of British Architects Scottish Development Department Trades Union Congress Water Authorities Association Water Research Centre The following bodies were also represented in the drafting of the standard, through subcommittees and panels: British Steel Industry Fed
8、eration of Sewer Renovation Contractors Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:10:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8005-5:1990 BSI 02-1999i Contents Page Committees responsibleI
9、nside front cover Forewordii Section 1. General 1Scope1 2Definitions1 3Abbreviations2 4Approach to sewer rehabilitation in UK and overseas2 5Sewerage Rehabilitation Manual (SRM)4 Section 2. Rehabilitation procedures 6Planning procedure6 7Integrated approach6 8Maintenance6 9Project appraisal7 Section
10、 3. Technical application 10Structural performance9 11Hydraulic performance12 12Structural upgrading13 13Hydraulic upgrading13 14Safety17 Appendix A Bibliography19 Figure 1 Rehabilitation options8 Figure 2 Example of SRM data sheet10 Figure 3 Details of information to complete SRM data sheet11 Table
11、 1 Age/materials relationship for UK sewers3 Table 2 Example performance criteria12 Table 3 Rehabilitation options to reduce hydraulic input to the sewer system14 Table 4 Rehabilitation options to maximize the use of existing sewer system capacity14 Table 5 Rehabilitation options to attenuate peak f
12、lows15 Table 6 Rehabilitation options to increase sewer system capacity16 Publications referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:10:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8005-5:1990 ii BSI 02-1999 Foreword This Pa
13、rt of BS 8005 has been prepared under the direction of the Civil Engineering and Building Structures Standards Policy Committee and is directed at general engineering practitioners who may either be embarking on a career in sewerage or be dealing with a particular aspect for the first time. It is no
14、t intended to be exhaustive in any field but sets out to present guidance on basic principles and good practice, indicating where a more detailed and comprehensive study may be made. BS 8005 supersedes and enhances CP 2005:1968, which is withdrawn, although some of the material incorporated is a res
15、tatement of the earlier text. BS 8005 gives guidance on the planning, design, construction, operation and maintenance of works to convey sewage, including storm sewage, surface water and trade effluents to a sewage treatment works, tidal waters or other final place of disposal. Recommendations are g
16、iven for the repair, renovation and replacement of sewers. Many end users of this British Standard, such as governments, public authorities, sewerage authorities and consultants, issue their own recommendations and specifications for sewerage which BS 8005 is intended to complement rather than repla
17、ce. This is particularly so with regard to the Sewerage Rehabilitation Manual (SRM) published by the Water Research Centre (WRc)1. BS 8005 is published in six separate Parts, as follows. Part 0: Introduction and guide to data sources and documentation; Part 1: Guide to new sewerage construction; Par
18、t 2: Guide to pumping stations and pumping mains; Part 3: Guide to planning and construction of sewers in tunnel; Part 4: Guide to design and construction of outfalls; Part 5: Guide to rehabilitation of sewers. It has been noted that substantial one-part codes and guides take a long time to revise a
19、nd if they are reviewed at infrequent intervals, they tend to become out of date quickly, especially in a field where technological development is rapid. The SRM was last revised in April 1986 and mentions a number of techniques as being “established”. Since that date a number of developing renovati
20、on techniques have been, or are in the process of being, tested and installed. Appendix B of the SRM lists a number of systems at various stages of development which are being monitored by WRc at pilot scale or full scale control trials. Other systems are being developed independently of these trial
21、s. It is intended therefore to keep a constant watch on new developments and to update BS 8005, Part by Part, as well as the SRM as soon as the work can be justified. BS 8301 sets out recommendations for building drainage and, while it relates generally to smaller pipelines, there is some overlap be
22、tween it and BS 8005. BS 6297 gives recommendations for the design and installation of small sewage treatment works and cesspools. Apart from Part 0, which is directed more specifically at the UK sewerage field, BS 8005 is for use both in the UK and, in appropriate circumstances, overseas. Licensed
23、Copy: London South Bank University, London South Bank University, Fri Dec 08 06:10:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8005-5:1990 BSI 02-1999iii Suggestions for the improvement of any Part of BS 8005 will be welcomed by the Secretary of SEB/43 at British Standards Institution, 2 Park S
24、treet, London W1A 2BS. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages T
25、his document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 20, an inside back cover and a back cover. This standard 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. Lic
26、ensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:10:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:10:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8005-5:1990 BSI
27、 02-19991 Section 1. General 1 Scope This Part of BS 8005 provides guidance on the procedures to be followed when considering the investigation and appraisal of the various options available to upgrade the structural and hydraulic performance of existing sewerage systems from the planning of the ini
28、tial investigations to final completion. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. Other references will be found throughout the text, indicated by bracketed numbers thus 7, and these are listed in the bibliography in Appendix A of this part
29、. The titles of British Standards not referred to in this Part of BS 8005 but of interest as dealing with closely associated subjects are listed in Appendix A of BS 8005-1:1987, and other publications that may be of interest are listed in Appendix B of BS 8005-1:1987. 2 Definitions For the purposes
30、of this Part of BS 8005, the definitions given in BS 8005-0 and BS 8005-1 apply, together with the following, some of which enlarge upon those given in the above standards. 2.1 catastrophic rainfall event rainfall event of return frequency far in excess of any sewerage design performance criteria ty
31、pically, say, a 1 in 200 year storm 2.2 core area part of a sewer network containing the critical sewers, and other sewers where hydraulic problems are likely to be most severe and require detailed definition within a flow simulation model 2.3 crack crack line visible on the pipe wall, with the piec
32、es still in place 2.4 critical sewer sewer where the potential consequences of structural failure justify detailed investigation and, where appropriate, pre-emptive rehabilitation 2.5 environmental impact change to existing conditions within the environment brought about by a specific action 2.6 exf
33、iltration escape of flow from sewer into surrounding ground 2.7 flooding (from sewers) condition where foul or surface water escapes from a sewerage system and lies either on the surface or enters basements 2.8 flow reduction process of decreasing flows into a sewer system or of removing a proportio
34、n of the flow already in a sewer system 2.9 flow simulation modelling of flows in surface water or combined sewer systems using a dynamic digital model 2.10 fracture crack visibly open along the length and/or circumference with the pieces still in place 2.11 infiltration entry of groundwater into se
35、wer 2.12 sewer pipeline or other construction, usually underground, designed to carry foulwater, waste water, surface water or other unwanted liquids 2.13 sewer connection connection, that may be a saddle connection, of lateral pipe or drain to a sewer other than by a purpose made or preformed junct
36、ion in the sewer run 2.14 sewer junction purpose made or preformed junction pipe built into the sewer usually during construction 2.15 sewer lateral pipe connected to a sewer 2.16 sewer rehabilitation all aspects of upgrading of existing sewer systems to improve structural flooding and environmental
37、 impact performance 2.17 structural sewer rehabilitation repair, renovation and renewal of sewer systems Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:10:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8005-5:1990 2 BSI 02-1999 2.18 hydraulic sewer rehabil
38、itation replacement, reinforcement, flow reduction or attenuation, storm sewage overflow rationalization and some renovation of sewer systems 2.19 sewer reinforcement provision of an additional sewer which, in conjunction with an existing sewer, increases overall flow capacity 2.20 sewer renovation
39、construction of a new sewer, on or off the line of an existing sewer, the basic function and capacity of the new sewer being similar to that of the old 2.21 sewer repair rectification of damage to the structural fabric of the sewer and the reconstruction of short lengths, but not of the whole of the
40、 pipeline 2.22 sewer replacement construction of a new sewer, on or off the line of an existing sewer. The function of the new sewer will incorporate that of the old, but may also include improvement or development work 2.23 sewer surcharge condition in which foul or surface water sewage is held wit
41、hin a gravity sewer system under pressure but does not escape to the surface 2.24 social cost cost incurred by society as a result of sewerage works and for which authorities have no legal responsibility 3 Abbreviations For the purposes of this Part of BS 8005 the abbreviations given in BS 8005-0 an
42、d BS 8005-1 apply, together with the following: 4 Approach to sewer rehabilitation in UK and overseas 4.1 General In the UK and elsewhere the attention of engineers is increasingly being directed towards: a) the consideration of the performance of existing sewerage systems; b) the design of appropri
43、ate upgrading works to achieve desired levels of service and to maintain asset condition. The approach to rehabilitation planning described in this British Standard can be applied universally but the emphasis should be varied depending on age and material of sewer together with functional and climat
44、ic factors. The age/material relationship for UK sewers is shown in Table 1. It will be noted that although clay sewers make up nearly 80 % of the system, the older sewers of concern (critical sewers) are predominantly brick and the younger sewers of concern are predominantly concrete. CCTVClosed ci
45、rcuit television OCFOverall cost factor RCFRepair costs factor RQORiver quality objective RWARegional water authority SRMSewerage Rehabilitation Manual SSOStorm sewage overflow WAAWater Authorities Associationa WRcWater Research Centre NOTE Abbreviations for use on data sheets are given in Figure 3.
46、 a Now replaced by the Water Services Association of England and wales. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 06:10:51 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8005-5:1990 BSI 02-19993 Table 1 Age/materials relationship for UK sewers In other coun
47、tries the sewers tend to be younger than in the UK so brick sewers tend to be fewer and less of a problem. In the UK about 70 % of systems are combined at least in part. Similar proportions are found in Germany and the Netherlands but in many other countries separate systems predominate. The environ
48、mental impact of combined and separate systems can be comparable but needs to be tackled somewhat differently. For example, with combined systems a major concern is pollution of receiving waters from premature operation of storm sewage overflows (combined sewer overflows). With separate systems the
49、concern is often the overloading of foul sewers and the potential overloading of treatment works from extraneous flows arising from infiltration and from surface water drains being misconnected. Climatic differences have to be considered. The UK has a temperate climate with moderate rainfall intensities. In hotter climates the rehabilitation procedures have to be adapted to take account of the higher risks of corrosion of cementitous materials and in colder climates account has to be taken of frost heave. In wetter climates the volumes of f
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