Field Vane Test FVT
1 Examples of correction factors to obtain the undrained shear strength from the measured value are shown in figures G.1 and G.2, based on local experience and back calculations of slope failures. 2 Correction factors based on figure G.1 may be used in soft normally consolidated clays. 3 Correction factors based on figure G.2 may be used in overconsolidated clays. 4 If more than one method correcting the measured value is used, the value of the correction factor which will give the lowest...
Info Uyh
Figure C.1 Unit shaft resistance for axially loaded piles For additional information and examples see Annex M. Table D.1 Values of the energy ratios ERr of the common equipment used in various countries and the correction factors to apply for normalizing to ERr 60
o A k [pLM p P I[ qsi z
A is the base area of the pile which is equal to the actual area for close ended piles and part of that area for open ended piles PLm is the representative value of the limit pressure at the base of the pile corrected for any weak layers below p0 is Ko lt jv - l u with Kq conventionally equal to 0,5, and crv is the total vertical overburden pressure at the test level and u is the pore pressure at the test level k is a bearing resistance factor given in table C.4 P is the pile perimeter 7si is...
Info Vgk
5.5.4 Effect of overburden pressure in sands 1 The effect of the overburden pressure in the N-value in sands with reference to the density index k gt may be taken into account by applying to the measured N-value the correction factor C given in table 5.2. 2 Table 5.2 Correction factors Cn due to the effective overburden pressure in sands
Info Fft
Figure L.3 Presentation of results from a number of piezometers in one measuring station designated No. 7 5 In case of presentation of long term measurements the example in figure L.4 can be followed. Alternatively the groundwater level can be expressed in depth below ground surface in m or as a pore pressure in kPa. Figure L.4 Presentation of long term measurements from three piezometers L.3 Sample guidelines for derivation of groundwater pressure 1 The natural groundwater pressure is part of...
Dynamic Probing DP
1 This is an example of derived values for the density index k from the dynamic probing DP test, for different values of the uniformity coefficient Qj range of validity 3 lt A 10 lt 50 a poorly graded sand C lt 3 above groundwater d 0,15 0,260 log V10 DPL b poorly graded sand Ck lt 3 below groundwater k 0,21 0,230 log V10 DPL c well graded sand-gravel Q, gt 6 above groundwater k - 0,14 0,550 log A 10 DPH . For additional information and examples see, Annex M 1 This is an example of deriving...
Info Iuq
1 P Dimensions and masses of the components of the driving device are given in table 6.1. The following requirements shall be fulfilled - the steel hammer must be conveniently guided to ensure minimal resistance during the drop - the automatic release mechanism shall ensure a constant free fall, with a negligible speed of the hammer when released and no induced parasitic movements in the drive rods - the steel drive head or anvil shall be rigidly connected to the top of the drive rods. 1 P The...
oed ax qc
a is a correlationfactor estimated on the basis of local experience An example of a correlation is given in annex B.3. 3.7.2 Pile foundations 1 P When the ultimate bearing resistance of piles is evaluated from CPT results according to 7.6.3.3 4 P of ENV 1997-1, calculation rules based on established correlations between the results of static load tests and CPT results shall be used. 2 In annex B.4 an example is given for the assessment of the bearing resistance of a single pile on the basis of...
Ps Cs As Os Tp
Dynamic probing Soil-Rock Sounding Static Sounding Cone Penetration Test with pressure recording Standard Penetration Test Pressuremeter Test Dilatometer Test Field Vane Test Plate Load Test Seismic measurements Pile Load Test Cylindrical dilatometer test Piston Sampler GW Ground water measurement Core Sampler GWO Ground water measurement Auger Sampler with open system Open Sampler GWC Ground water measurement with Test Pit Sampling closed system
Info Ova
For additonal information and examples see Annex M For additonal information and examples see Annex M 1 Below examples of correlations of blow counts and density indices Skempton, 1986 are given. 2 The relationship between the blow count V60, density index gt emax e smax - amp min and the effective overburden pressure oj kPa x 102 in a given sand can be represented by the expression The parameters a and b in normally consolidated sands are nearly constant for 0,35 lt b lt 0,85 and 0,5 lt orv'...
Standard Penetration Test Soil Exploration Din
Baugrund-Sicherheitsnachweise im Erd- und Grundbau, Teil 100 Berechnung nach dem Konzept mit Teilsicherheitsbeiwerten Manuskript, Januar 1996 DIN 4094-100 Soil verification of earthworks and foundation, Part 100 Analysis in accordance with the partial safety factor concept . Baugrund-Erkundung durch Sondierungen Anwendungshilfen, Erkl rungen Dezember 1990 and supplement 1 Soil exploration by penetration testing aids to application, Bergdahl U., Ottosson E., Malmborg B.S. 1993 Plattgrundl ggning...
E
Retaining Removable end nut cap washer Figure 10.1 The main components of a dilatometer apparatus in rocks 2 P probe cylindrical device consisting of an outer flexible membrane mounted on an inner steel core that can be filled with a pressurized fluid so that the membrane can be inflated from the inside and expanded against the wall of the borehole to apply a uniform radial pressure. 3 P membrane stiffness pressure that shall be applied inside the probe to inflate and expand the membrane in...
Info Kal
1 Values given are valid for sands. For silty soils a reduction of 3 should be made. For gravels 2 should be added. 2 Values given for the drained modulus correspond to settlements for 10 years. They are obtained assuming that the vertical stress distribution follows the 2 1 approximation. Furthermore, some investigations indicate that these values can be 50 lower in silty soils and 50 higher in gravelly soils. In overconsolidated cohesionless soils the modulus can be considerably higher. When...
Section Aa
1 P The vane shall consist of four rectangular plates fixed at 90 angles to each other, see figure 8.1. The blades shall be parallel with the extension rods and no distortion is allowed. 2 P The relation between the height h and the diameter o of the vane shall be 2,0 for standard vanes. 3 A maximum vane size cfx h of 100 mm x 200 mm for very soft soils and a minimum vane size of 40 mm x 80 mm for dense soils are commonly used for standard vanes. 4 P The blade thickness shall not exceed 3,0 mm...
X X X X X X X Iwd
Group according to ENV 1997-1, Annex E, Table E.1. 27 The classification of core samples will normally comprise a geological description, the core recovery, the Rock Quality Designation RQD , the degrees of induration, weathering and fissuring. For weathering classification see annex L. In addition to the routine tests in table 2.3 for rocks other tests may be selected for different purposes, e.g. density of grains, wave velocity, Brazilian tests, shear strength of rock and joints, slake...
Ocr Geotechnical
For continuous flight auger piles lt jb iii mean may not exceed 2 MN m , unless the results of CPT's which were performed at a distance from the pile gt 1 m after pile fabrication are used for the calculation of the bearing resistance is the pile class factor given in table B.2 is the factor which takes account of the shape of the pile point as is the factor which accounts for the shape of the pile base as shown in figure B.4 4 The maximum shaft resistance phax shaft should be determined as...
Aeo x A x Cn x N
X is the correction factor for energy losses due to the rod length in sand Cu is the correction factor for the effective overburden pressure in sand 1 P In addition to the requirements given in 2.6 the report shall include the following information penetration of the sampler under static weight, if significant number of blows required for each 150 mm increment of penetration including the seating drive if the drive is terminated before the full penetration in any of the 150 mm interval record...
Info Lgz
For MPM tests the pressure is p ordinate. otted as abscissa and the volume change as 4.7 Derived values of geotechnical parameters 1 P When an indirect or analytical method is used the geotechnical parameters of shear strength and shear modulus shall be derived from the pressuremeter curve. 2 P When a direct or semi-empirical method is used all the features of the method shall be taken into account. 4.7.1 Derived values for the calculation of bearing capacity resistance of spread foundations 1...
Annexes
A Example of a flow chart for the selection of ground investigation methods in different phases 104 B.1 CPT example of derived values for the angle of shearing resistance and drained Young's modulus 105 B.2 CPT example of a settlement calculation for spreadfoundations 106 B.3 CPT example of a correlation between oedometer B.4 CPT example of the calculation of the bearing resistance of a single pile 108 C.1 PMT example of the calculation of the bearing resistance of spread foundations 112 C.2...
Cohesive Soil 1
CPT, DP or SPT Sampling PS, OS, AS PMT, DMT, GWO, PIL in TP, CS, RDT PMT in weathered rock , GWO SS, CPT, DP, SPT, or SR Sampling PS, OS, CS FVT, PMT, GWC, PIL SS or CPT, DP, Sampling PS, OS, CS, TP , FVT, DMT or PMT, G W CPT, DP or SPT Sampling PS, OS, AS PMT, DMT, GWO, PIL CPT DP, SPT Sampling PS, OS, AS, TP Possibly PMT or DMT, PLT , GWO in TP, CS, RDT PMT in weathered rock , GWO SS or CPT, DP, Sampling PS, OS, CS, TP , FVT, DMT or PMT, G W CPT DP, SPT Sampling PS, OS, AS, TP Possibly PMT or...
fieldtesting
Eurocode 7 Calcul g otechnique - Partie 3 Calcul sur la base d'essais en place Eurocode 7 Entwurf, Berechnung und Bemessung in der Geotechnik - Teil 3 Felduntersuchungen f r die geotechnische Bemessung This European Prestandard ENV was approved by CEN on 30 July 1997 as a prospective standard for provisional application. The period of validity of this ENV is limited initially to three years. After two years the members of CEN will be requested to submit their comments, particularly on the...
Nni
P.O.Box 5059 NL-2600 GB Delft The Netherlands or to a national standards organisation. National application documents 14 In view of the responsibilities of authorities in member countries for the safety, health and other matters covered by the essential requirements of the CPD, certain safety elements in this ENV have been assigned indicative values which are identified by . The authorities in each member country are expected to assign definitive values to these safety elements. 15 Many of the...