BS EN 752-2008 建筑物外部排水和污水系统.pdf
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1、BRITISH STANDARD BS EN 752:2008 Drain and sewer systems outside buildings ICS 93.030 BS EN 752:2008 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2008 BSI 2008 ISBN 978 0 580 55750 7 National foreword This British Standard is the U
2、K implementation of EN 752:2008. It supersedes BS EN 752, Parts 1 to 7, which have been withdrawn. The UK participation in its preparation was entrusted to Technical Committee B/505, Wastewater engineering. A list of organizations represented on this committee can be obtained on request to its secre
3、tary. The British Standard contains both the text of the European Standard together with a National Annex, which gives further UK-specific guidance on the application of the European text. The European Standard should therefore be read in conjunction with the National Annex and, to assist in this, c
4、ross references to the clauses in the European text are included in the headings in the National Annex. This revision of EN 752 includes some important and timely changes. It takes a more integrated view of sewer system management in the context of the wider urban drainage system and the wider water
5、 environment. This both supports the current initiative on integrated urban drainage management in the UK and is essential for the proper implementation of the Water Framework Directive. In response to climate change, the European text introduces the concept of exceedence flood risk assessment and f
6、urther UK guidance on this is given in the National Annex. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigen
7、da issued since publication DateComments W - - - - - - - 7- 7 - 7 - - aspects sensed by sight or smell, e.g. floating solids, oil films or bank-side litter 3.3 air valve valve used to allow air to escape from or enter into a rising main 3.4 anaerobic dissolved oxygen, nitrate, nitrite and sulfate is
8、 absent EN 1085:2007, definition 4120 BS EN 752:2008 EN 752:2008 (E) 12 3.5 backdrop manhole manhole with a connection, by means of a vertical pipe, at or just above invert, from a drain or sewer at a higher level 3.6 backwater level elevation of the surface of the wastewater predicted or occurring
9、in a drain or sewer system due to the hydraulic conditions downstream 3.7 biochemical oxygen demand (BOD) concentration of dissolved oxygen consumed under specific conditions (t days at 20 C with or without nitrification inhibition) by the biological oxidation of organic and/or inorganic matter in w
10、ater EN 1085:2007, definition 3110 3.8 catchment area area draining to a drain, sewer or watercourse EN 1085:2007, definition 1270 3.9 cleaning ball spherical device, having an indented surface, designed to be carried through a drain or sewer by the flow to facilitate removal of sediments 3.10 confi
11、ned space space in which the ventilation is restricted to the extent that special safety precautions need to be taken 3.11 combined sewer overflow device, on a combined system that relieves the system of excess flow EN 1085:2007, definition 2130 3.12 combined system drain and sewer system designed t
12、o carry both foul wastewater and surface water in the same pipeline(s) EN 1085:2007, definition 2110 3.13 common trench trench in which more than one pipe is located 3.14 dam board removable plank or section placed across a sewer or drain to divert or hold back the flow 3.15 depression storage preci
13、pitation retained in surface hollows that does not contribute to runoff 3.16 design life notional lifetime of an asset used for the purposes of design BS EN 752:2008 EN 752:2008 (E) 13 3.17 detention tank tank or reservoir for the temporary storage of wastewater EN 1085:2007, definition 2240 3.18 do
14、mestic wastewater water discharged from kitchens, laundry rooms, lavatories, bathrooms, toilets and similar facilities EN 1085:2007, definition 2030 3.19 drain pipeline, usually underground, designed to carry wastewater from a source to a sewer EN 1085:2007, definition 2250 3.20 drainage service nat
15、ural or artificial system for the draining of a catchment area 3.21 dry weather flow flow not affected by rainfall or snow melt EN 1085:2007, definition 3050 3.22 dry well dry chamber forming part of a pumping station and containing pumping equipment, normally used in conjunction with a wet well 3.2
16、3 duty point rate of flow and the corresponding total head for which a pump is designed or selected 3.24 exfiltration escape of wastewater from a drain or sewer system into surrounding ground EN 1085:2007, definition 2230 3.25 extraneous water unwanted flow in a drain or sewer system 3.26 explosion
17、proof protected from causing ignition of flammable gases 3.27 flooding condition where wastewater and/or surface water escapes from or cannot enter a drain or sewer system and either lies on the surface or enters buildings (see also surface flooding) 3.28 flow balancing reduction in peak discharge b
18、y means of temporary storage of flow BS EN 752:2008 EN 752:2008 (E) 14 3.29 flushing use of a temporary substantially increased flow to facilitate removal of obstructions or sediments from drains or sewers 3.30 gravity system drain or sewer system where flow is caused by the force of gravity and whe
19、re the pipeline is designed usually to operate partially full EN1085:2007, definition 2260 3.31 hydro-biological stress detrimental impact on aquatic flora and fauna, caused by high flow velocity and scour 3.32 infiltration into the ground the movement of surface water or treated effluent into the g
20、round EN 1085:2007, definition 2210 3.33 infiltration into the drain or sewer system unwanted flow resulting from an ingress of groundwater into a drain or sewer system (see Figure 2) EN 1085:2007, definition 2220 3.34 inspection chamber chamber with a removable cover constructed on a drain or sewer
21、 that permits the introduction of cleaning and inspection equipment from surface level, but does not provide access for personnel 3.35 integrated sewer system management co-ordinated management of the planning, design, construction, rehabilitation, operation and maintenance of all drain and sewer sy
22、stems in a catchment area taking into account all aspects of their performance 3.36 integrated urban drainage management co-ordinated management of the planning, design, construction, rehabilitation, operation and maintenance of all urban drainage systems in a catchment area taking into account all
23、aspects of their performance 3.37 integrated water policies co-ordinated policies for the management of all bodies of water within a river basin including urban drainage systems within it 3.38 inverted siphon length of gravity drain or sewer that is lower than upstream or downstream lengths to allow
24、 the pipeline to pass below an obstacle, and which consequently operates under pressure 3.39 jetting use of high-pressure water jetting equipment to facilitate removal of obstructions or sediments from drains or sewers BS EN 752:2008 EN 752:2008 (E) 15 3.40 maintenance routine work undertaken to ens
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