In Situ Tests by Flat Dilatometer

by Silvano Marchetti, Assoc. Prof. of Soil Mech.; Faculty of Engrg., L'Aquila Univ., Italy,

Serial Information: Journal of the Geotechnical Engineering Division, 1980, Vol. 106, Issue 3, Pg. 299-321

Document Type: Journal Paper

Discussion: Schmertmann John H. (See full record)
Closure: (See full record)

Abstract: A flat blade shaped tip, with a thin flat circular steel membrane fitted flush with one side, is jacked into the ground. At 20-cm depth intervals the penetration is stopped, the membrane is inflated and the following readings are taken: A = pressure at which the membrane starts to expand against the soil; B = pressure needed to deflect the membrane center 1.00 mm against the soil. Simple expressions derived in the paper are used to determine the parameters ID (material index), KD (horizontal stress index), ED (dilatometer modulus) from the field readings. The profiles of ID, KD, ED are used with the empirical correlations presented in the paper to obtain estimates of a number of soil parameters used in geotechnical engineering design.

Subject Headings: Membranes | Soil pressure | Penetration tests | Parameters (statistics) | Measuring instruments | Steel |

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