W 122 Technical Rule - Standard 08/2013 -PDF file-

Closing-off Structures for Water Abstraction Wells

76,15 €*
  • DVGW
  • 31 pages
  • available as PDF only
  • 3rd edition 2013
  • 1
  • 1
  • 510403

76,15 €*

This Code of Practice W 122 comprises all closing‑off structures for groundwater developments by vertical and horizontal filter wells. The new version incorporates operational issues insofar as they have an immediate effect on the requirements placed on the planning and construction of closing‑off structures.

1 Scope

2 Normative references

3 Terms, symbols, units and abbreviations

3.1 Enclosed electrical operating area

3.2 Humid room

3.3 Highest high water level (HHWL)

3.4 WP concrete

4 General

5 Requirements on the structure

5.1 Principles of construction

5.1.1 Design

5.1.2 Shape and dimensions

5.1.3 Stability

5.1.4 Location above high-water mark and leak tightness

5.1.5 Access openings

5.1.6 Ventilation and aeration

5.1.7 Drainage

5.1.8 Heat insulation

5.2 Criteria and principles of safety equipment

5.2.1 Access and interference security

5.2.2 Hygienic safety

5.2.3 Safety in accordance with the regulations for the prevention of accidents (occupational safety)

5.3 Other principles

6 Designs

6.1 Subterranean closing-off structures

6.1.1 General

6.1.2 Well shafts made from in-situ concrete

6.1.3 Use of prefabricated concrete and reinforced concrete components

6.1.4 Use of prefabricated well shafts

6.1.5 Fully equipped well shafts

6.2 Surface closing-off structures

6.2.1 General

6.2.2 Structures from in-situ concrete, brickwork, and prefabricated reinforced concrete components

6.3 Special designs

7 Technical equipment

7.1 Construction and mechanical equipment

7.1.1 Wellhead

7.1.2 Well risers

7.1.3 Wall ducts for pipes and cables

7.1.4 Vertical ladders, manholes

7.1.5 Well shaft covers

7.1.6 Metrology

7.1.7 Shut-off devices

7.2 Electrical engineering

7.3 Other technical equipment

7.4 Access road, paving of surfaces

8 Organisational aspects

8.1 Application under building law and water law

8.2 Inspections and acceptances

8.3 Documentation

Annex A (informative) - Closing-off structure (round) for vertical wells

Annex B (informative) - Closing-off structure (rectangular) for vertical wells

Annex C (informative) - Closing-off structure (rectangular) made of prefabricated reinforced concrete components

Annex D (informative) - Closing-off structure for vertical wells as prefabricated steel or plastic shaft

Annex E (informative) - Closing-off structure (rectangular and round) for horizontal filter wells

Annex F (informative) - Closing-off structure (rectangular) for vertical wells with surface access

Annex G (informative) - Closing-off structure as prefabricated unit in special design