BS EN 14199:2015 - Execution of special geotechnical works. Micropiles

BS EN 14199:2015

Execution of special geotechnical works. Micropiles

Status : Current, Under review   Published : May 2015



1.1 This European Standard establishes general principles for the execution of micropiles.

They are for drilled piles constructed using a drilling tool with a diameter less than 300 mm.


This European Standard is not applicable to driven piles, the execution of which is governed by EN 12699.


For a definition of shaft diameter see 3.3.

1.2 Micropiles are structural members to transfer actions to the ground and can contain bearing elements to transfer directly or indirectly loads and or to limit deformations. For examples of micropiles see Figure 1, Figure 2 and Figure 3. Their shaft and base resistance can be improved (mostly by grouting) and they can be constructed with (see Figure 4):

  • uniform cross section (straight shaft); or

  • telescopically changing shaft dimensions;

  • shaft enlargements; and/or

  • base enlargement.

1.3 Other than practical considerations, there are no limitations regarding, length, inclination (definition of inclination, see Figure 5), slenderness ratio or shaft and base enlargements.

1.4 The provisions of this European Standard apply to (see Figure 6):

  • single micropiles;

  • micropile groups;

  • reticulated micropiles;

  • micropile walls.

1.5 The material of micropiles covered by this European Standard can be:

  • steel or other reinforcement materials;

  • grout, mortar or concrete;

  • a combination of above.

1.6 Micropiles can be used for:

  • working under restricted access and/or headroom conditions;

  • foundations of new structures (particularly in very heterogeneous soil or rock formations);

  • reinforcing or strengthening of existing structures to increase the capacity to transfer load to depth with acceptable load settlement characteristics, e.g. underpinning works;

  • reducing settlements and/or displacements;

  • forming a retaining wall;

  • reinforcing of soil to form a bearing and/or retaining structure;

  • improving slope stability;

  • securing against uplift;

  • other applications where micropile techniques are appropriate.

1.7 Deep mixing columns according to EN 14679 are not included in this European Standard. Columns constructed by jet grouting are covered by EN 12716. Ground anchors are covered by EN 1537.

Standard NumberBS EN 14199:2015
TitleExecution of special geotechnical works. Micropiles
StatusCurrent, Under review
Publication Date31 May 2015
Normative References(Required to achieve compliance to this standard)EN 10210, EN ISO 15609-1, EN 1994-1-1, EN 10219, ISO 14341, EN 12390-3, EN ISO 18276, EN ISO 4063, EN ISO 11960, ISO 15630-3, ISO/DIS 22477-1:2014, EN 1990, EN 1992-1-1, ISO 4063, EN 1536:2010, ISO 15609-1, EN 206:2013, EN 1997-1:2004, ISO 18276:2017, EN 447:2007, ISO 17660-1, ISO 9692-2, EN 10080, EN 934-2, ISO 9692-1, EN 1993, EN ISO 14341, EN 1090-2, EN 1991, EN 445, ISO 5817, EN 1997-2, EN ISO 5817, EN ISO 9692-2, EN ISO 17660-1, prEN 10138-4:2001, ISO 11960, ISO 17632, EN ISO 2560, EN 16228, ISO 2560, EN ISO 17632, EN ISO 15630-3, EN 10025, prEN ISO 22477-1:2014, EN ISO 9692-1
Informative References(Provided for Information)EN 12620, EN 1537, EN 10204, prEN 10138-1, EN 12699, EN 12716, EN 14679
ReplacesBS EN 14199:2005
International RelationshipsEN 14199:2015
Draft Superseded By13/30280743 DC
DescriptorsStructures, Transfer processes (physics), Structural design, Piles, Soil mechanics, Reinforcement, Construction operations, Working load limit, Construction systems, Loading, Foundations, Soil settlement, Stability
Title in FrenchExécution des travaux géotechniques spéciaux. Micropieux
Title in GermanAusführung von Arbeiten im Spezialtiefbau. Mikropfähle
ISBN978 0 580 82495 1
File Size1.484 MB

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