Nationalt Anneks til EC7 Del 2 Jordbundsundersøgelser og prøvning

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Thomas Eriksen
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1 Nationalt Anneks til EC7 Del 2 Jordbundsundersøgelser og prøvning Status for Feltkommitéens arbejde 3/2009 v/carsten Bonde

2 DGF s feltkomité er en åben faglig gruppe under Dansk Geoteknisk Forening. Gruppen består af geologer og ingeniører med interesse for løbende at udvikle og fremme feltgeoteknikkens virke i Danmark til gavn for alle interesserede. EC7-Del 2 Én af komitéens opgaver p.t. er bl.a. at sikre, at dansk praksis bevares i ønskeligt omfang på baggrund af den øgede internationale standardisering og udvikling. Dette sikres ved bl.a. i samarbejde med Laboratoriekommitéen og S- 415 / DS at vurdere relevante dele af DS/EN1997-2, samt de ISO standarder, som der refereres til, og bidrage med personlig/firmarelateret viden på fagområdet med henblik på at udgive et dansk nationalt anneks for EN i Danmark. Dette nationale anneks skal indeholde information omkring anvendelsen af EN i Danmark, og specielt forholde sig til de normafsnit og annekser, hvor danske geotekniske interesser og erfaringer skal tilgodeses

3 Komitéens 15 medlemmer Allan Meier Ørting - Skude & Jacobsen Anne Jansen - Grontmij Carl Bro Anne Nørremark Rambøll Carsten Bonde GEO (Formand) Claus Bo Nielsen - COWI Hans Denver Jacob Holte - Rambøll Klaus Møller Frederiksen - Alectia Knud Steffensen - Grontmij Carl Bro Leif Fuglsang Morten Vanggaard - Skude & Jacobsen Susanne Granhøj - GEO Thomas Ingemann-Nielsen - DTU, Byg Trine Vienberg - Franck Geoteknik Troels N. Hjort - NIRAS

4 EC7-Del2 Annexes (Informative) A List of test result and geotechnical test standards B Planning of geotechnical investigations C Example of groundwater pressure derivations. D Cone and piezocone penetration tests (CPT & PCPT) E Pressuremeter Test (PMT) F Standard penetration test (SPT) G Dynamic probing (Rammesondering) H Weight Sounding (Drejesondering) I Field vane test (FVT) J Flat dilatometer (DMT) K Plate loading test (PLT)

5 Annex A List of test results of geotechnical test standards

6 Annex B Planning of geotechnical investigations

7 Annex B Planning of geotechnical investigations

8 Annex B Planning of geotechnical investigations B3. Recommendations for spacing and depths of investigations Strength and deformation, items (1) to (9) and (13-piles) High rise and industrial structures (grid of 15 to 40 m) Large area structures (grid < 60 m) Linear structures (spacing 20 m to 200 m) Special structures (bridges, machinery, 2-6 points per foundation) Dams and weirs (25 to 75 m) Depths depending on type of structure, competent strata, bedrock Groundwater conditions items (10) to (12) Depths Piezometric surface and the groundwater table: below excavation base Piezometric surface and the groundwater table: above excavation base

9 Annex D Cone and piezocone penetration tests Interpretation of geology Derivation of effective angles of shearing / Youngs E module Resistance of cast in-situ piles on basis of static load tests and CPT Determination of compressive maximum bearing resistance of a pile Annex E Pressuremeter Test Bearing resistance of spread foundations on basis of Ménard limit pressure Calculation of settlemets on basis of E and Ménard limit pressure Compressive resistance Q of a single pile Annex F Standard penetration test (SPT) Correction and correlation of results

10 Annex G- Dynamic Probing Correlation of results to density index, I D Oedometer modulus on basis of DP results Correlation between DP and CPT and between DP types Annex I Field vane test Correction factors for the undrained shear strength, c u = c fv 1. DGI Fissured clay 2. Larsson Atterberg liquid limit Normally consolidated clays 3. Aas, 1979 Plasticity Index and vertical stress Over consolidated clays 4. Aas, 1986 Atterberg limit and state of consolidation, normally and over-consolidated clays 5. Larsson, 2003 Atterberg limits and the state of consolidation, normally and slightly over-consolidated clays

11 Annex J Flat dilatometer test Estimation of E oed on basis of DMT (Marchetti, Italy) Annex K Plate loading test Derivation of undrained shear strength (on surface or in the borehole) Derivation coeeficient of sub-grade reaction, k s (Bergdahl, 1993) Calculation of settlements in sand (Bergdahl, 1993)

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