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Standard

NS-EN 14199:2005

Tilbaketrukket

Merknad: Denne standarden har en ny utgave: NS-EN 14199:2015

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1.1 This Standard establishes general principles for the execution of piles: - which have a small diameter (smaller than 300 mm outside diameter for bored piles and smaller than 150 mm for displacement piles); - and which can be typically installed by means of small rigs. These piles are herein after referred as "micropiles". 1.2 Micropiles are structural members to transfer actions to the ground and may contain bearing elements to transfer loads and or to limit deformations. Their shaft and base resistance may be improved (mostly by grouting) and they may be constructed with (see Figure 1): - 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 shaft or base enlargements, length, rake (definition of rake, see Figure 2) or slenderness ratio. 1.4 The provisions of the Standard apply to (see Figure 3): - single micropiles; - micropile groups; - micropile walls; - reticulated micropiles. 1.5 The micropiles which are the subject of this Standard can be installed into the ground using drilling, driving or a combination of these methods. 1.6 The material of micropiles covered by this Standard can be: - steel, cast iron or other reinforcement materials; - grout, mortar or concrete; - a combination of above. 1.7 Mixed-in-place columns and timber piles are not included in this Standard. Columns constructed by jet grouting are covered by prEN 12716. Ground anchors are covered by EN1537. Nails used in soil reinforcement are covered by prEN WG 9/TC 288. 1.8 Micropiles are often used for working under restricted access and/or head room conditions and for the underpinning of existing structures. 1.9 Micropiles may be used for: - 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

Dokumentinformasjon

  • Standard fra SN
  • Publisert:
  • Tilbaketrukket:
  • Utgave: 1
  • Versjon: 1
  • Varetype: NAT
  • Products.Specs.pages
  • ICS 93.020
  • National Committee SN/K 310

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