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BSI 20/30397008 DC 2020

BSI 20/30397008 DC 2020

$13.70

BS EN 12889. Trenchless construction and testing of drains and sewers

Published By Publication Date Number of Pages
BSI 2020 53
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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 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.

Mining or tunnelling (e.g. in situ construction or the use of prefabricated segments) are not covered by this document although some parts may apply to these methods.

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
1 30397008-NC
3 41_e_stf (1)
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
27 6.3 Manned techniques
6.3.1 General
28 6.3.2 Non-steerable techniques
6.3.3 Steerable techniques
6.3.3.1 General
6.3.3.2 Shield (open) with Partial Face Excavation without Support or with Mechanical Partial Support
29 6.3.3.3 Shield (open) with Partial Face Excavation without Support or with Mechanical Partial Support by Compressed Air Pressurization of the Working Face
6.3.3.4 Shield (open) with Full Face Excavation with Mechanical Partial Support with-out or by Compressed Air Pressurization of the Working Face
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)
6.3.3.7 Heading
31 6.3.4 Other manned techniques
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
7.2.3 Subsoil and groundwater
34 7.2.4 Minimum clear dimensions
7.2.5 Subsidence, heaves, cover
7.2.6 Layout of the line
7.2.7 Tolerances
35 7.2.8 Starting, intermediate and target pits
7.2.9 Working face support
7.2.10 Additional measures in water bearing subsoil
36 7.2.11 Obstacles
7.2.12 Soil conditioning
7.2.13 Structural calculation
7.2.14 Construction site arrangement
7.3 Work preparation and construction
7.3.1 General
37 7.3.2 Starting, intermediate and target pits
7.3.3 Exit and entry processes
7.3.4 Launch and reception shafts
7.3.5 Overcut
7.3.6 Recording and logging of jacking parameters
38 7.3.7 Support of the working face
7.3.8 Lubricant and supporting medium
7.4 Avoidance of damage
39 8 Inspection and testing of pipelines after installation
8.1 General
8.2 Visual inspection
8.3 Leaktightness
40 9 Qualifications
41 Annex A (informative)Abstract from Directive 2014/25/EU of the European Parliament and of the Council of 26 February 2014 on procurement by entities operating in the water, energy, transport and postal services sectors and repealing Directive 2004/17/EC (Text with EEA relevance)
42 Annex B (informative)Planning information for the application of different systems
50 Annex C (informative)Typical ranges of application regarding diameters and lengths in suitable soil
52 Annex D (informative)Typical ranges of application for selected trenchless techniques regarding diameters and lengths in suitable soils

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BSI 20/30397008 DC 2020
$13.70