W 128 Technical Rule - Standard 07/2008 -PDF file-

Design and Construction of Horizontal Filter Wells

59,59 €*
  • DVGW
  • 19 pages
  • available as PDF only
  • 1st edition 2008
  • 1
  • 1
  • 510405
ST

59,59 €*

This Code of Practice W 128 provides a basis for the drilling and dimensioning of horizontal boreholes and the construction of horizontal filter wells. This Code of Practice does not discuss cut‑and‑cover methods ‑ protected by e.g. pit lining ‑ that are sometimes used in the field.
Preamble

1 Scope

2 Normative References

3 Terms, Symbols, Units and Abbreviations

3.1 Horizontal Filtering Wells

4 Engineering

5 Water Management and Hydrogeological Requirements

6 Technical Requirements

6.1 General

6.2 Dimensioning Parameters

6.3 Drilling Methods

6.3.1 General

6.3.2 Pipe Jacking Methods (HFB)

6.3.2.1 General

6.3.2.2 Ranney Collector Well

6.3.2.3 Fehlmann Collector Well

6.3.2.4 Preussag Well

6.3.3 Steerable Horizontal Directional Drilling

6.4 Design and Construction

6.4.1 Well Shaft

6.4.2 Solid-wall Pipes and Well Screen Pipes

6.4.3 Filter Sands and Filter Gravels

6.4.4 Development

6.4.5 Well Testing

6.5 Regeneration of Horizontal Filtering Wells

7 Quality Assurance

7.1 Inspections and Acceptances

7.2 Documentation

8 Contract Awarding Procedure