About CEN
The European Committee for Standardization is one of three European Standardization Organizations (together with CENELEC and ETSI) that have been officially recognized by the European Union and by the European Free Trade Association (EFTA) as being responsible for developing and defining voluntary standards at European level.
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Project
| Reference | prEN 14199 rev |
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| Title | Execution of special geotechnical works - Micropiles |
| Work Item Number | 00288039 |
| Abstract/Scope | 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. NOTE 1 This European Standard is not applicable to driven piles, the execution of which is governed by EN 12699. NOTE 2 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. |
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Relations
| Supersedes | EN 14199:2015 |
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| Superseded by |
(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved
(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat
(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level
(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement
(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn
(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.
In the case of undated standard, a link to the last dated version is provided.
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