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BS EN 12889:2022

BS EN 12889:2022

$198.66

Trenchless construction and testing of drains and sewers

Published By Publication Date Number of Pages
BSI 2022 56
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This document is applicable to the trenchless construction, trenchless replacement techniques and testing of new drains and new sewers in the ground and usually operating as gravity or pressure pipelines, formed using prefabricated pipes and their joints. Renovation techniques for existing pressure and non-pressure systems are not covered by this document. Methods of trenchless construction include: – manned and unmanned techniques; – steerable and non-steerable techniques. NOTE 1 Mining or tunnelling techniques for permanent structures (e.g. in situ construction or the use of prefabricated segments) are not covered by this document although some parts can apply to these methods. NOTE 2 Trenchless insertion using a pipe plough system is a common method for installing small pipes and cables. The method does not exactly cope with the scope of this document. Therefore, it is described in the informative Annex D. Requirements for associated pipeline installation work other than trenchless construction, e.g. for manholes and inspection chambers, are not covered by this document and are specified in EN 1610. This also applies to pipes that are subsequently installed within entry and exit shafts/pits.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 1 Scope
2 Normative references
3 Terms and definitions
9 4 General
4.1 Technical principles
4.2 Safeguarding design decisions
10 5 Construction components and materials
5.1 General
5.2 Pipes and joints
5.3 Manholes and inspection chambers
5.4 Delivery, handling and transportation on site
5.5 Storage
11 5.6 Other materials
6 Techniques
6.1 Classification
13 6.2 Unmanned techniques
6.2.1 General
6.2.2 Non-steerable techniques
6.2.2.1 General
6.2.2.2 Soil displacement techniques
17 6.2.2.3 Soil removal techniques
20 6.2.3 Steerable techniques
6.2.3.1 Microtunnelling
23 6.2.3.2 Pilot pipe jacking
25 6.2.3.3 Directional drilling (also called HDD – Horizontal directional drilling)
6.3 Manned techniques
6.3.1 General
26 6.3.2 Non-steerable techniques
6.3.3 Steerable techniques
6.3.3.1 General
6.3.3.2 Shield (open) with partial working face excavation, with or without supporting slope, with or without mechanical support
27 6.3.3.3 Shield (open) with partial working face excavation, with or without supporting slope, with or without mechanical support under compressed air
28 6.3.3.4 Shield (open) with cutting wheel, with or without mechanical support, under or not under compressed air
29 6.3.3.5 Shield (closed) with full face excavation and fluid support and compressed air (Mixshield)
30 6.3.3.6 Shield (closed) with full face excavation and earth pressure balance (EPB shield)
6.3.4 Other manned techniques
6.3.4.1 General
6.3.4.2 Heading
31 7 Requirements of planning and construction
7.1 General
7.2 Basic evaluation, design and construction planning
7.2.1 General
32 7.2.2 Survey of existing structures and systems
33 7.2.3 Ground and groundwater
35 7.2.4 Minimum clear dimensions
7.2.5 Subsidence, heaves, cover
7.2.6 Layout of the line
7.2.7 Tolerances
7.2.8 Starting, intermediate and target pits
36 7.2.9 Working face support
7.2.10 Additional measures in water bearing ground
7.2.11 Obstacles
7.2.12 Soil conditioning
37 7.2.13 Structural calculation
7.2.14 Construction site arrangement
7.3 Work preparation and construction
7.3.1 General
38 7.3.2 Starting, intermediate and target pits
7.3.3 Exit and entry processes
7.3.4 Static calculation of launch and reception shafts
7.3.5 Overcut
7.3.6 Recording and logging of jacking parameters
39 7.3.7 Support of the working face
7.3.8 Lubricant and supporting medium
7.4 Avoidance of damage
40 8 Inspection and testing of pipelines after installation
8.1 General
8.2 Visual inspection
8.3 Leaktightness
9 Qualifications
41 Annex A (informative)Additional information about the different systems
51 Annex B (informative)Guide to typical ranges of application regarding diameters and lengths in suitable soil
53 Annex C (informative)Guide to typical ranges of application for selected trenchless techniques regarding diameters and lengths in suitable soils
54 Annex D (informative)Trenchless insertion using a pipe plough system

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BS EN 12889:2022
$198.66