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Studio Prof. Marchetti • Flat Dilatometer (DMT)

Product Type
Flat Dilatometer
Product Snapshot
Product Name
Flat Dilatometer (DMT)
Product Type
Dilatometer
Model/Series
DMT
Manufacturer
Studio Prof. Marchetti
Procurement
Buy ● Equipment & Operator
Overview
The Flat Dilatometer (DMT) is an in situ test for the determination of various key soil parameters used for geotechnical design. The test is rapid, accurate, simple and cost-effective. The results are highly repeatable and independent from the operator. The blade may be advanced with most common field machines, including penetrometers and drill rigs. DMT measurements are performed in situ, directly on the soil in its original position and state. This eliminates the disturbance caused by drilling, sampling and transport to laboratory. The profiles of the results are available real time during test execution. The direct measurement of soil deformation enables accurate estimations of the elastic modulus. The KD parameter provides stress history information of the soil, a very difficult property to estimate with other testing methods.

Main Applications
  • Main Applications
  • Soil stratigraphy
  • Stress history (OCR, K0)
  • Settlement prediction
  • Soil Improvement quantification
  • Slip surface detection in clayey slopes
  • P-y curves for laterally loaded piles
  • Liquefaction potential
  • Permeability in clay
  • FEM input parameters (e.g. Plaxis)
  • Subgrade modulus for pavements
  • Subgrade modulus for diaphragm walls
 
Physical
Length
280 mm
Width
95 mm
Thickness
40 mm
Weight (In Air)
2.4 kg
Launch & Recovery
Drilling Rig
Publications
The flat dilatometer (DMT) was first used in offshore site investigations in the late 80s. Since then, the DMT and also the seismic dilatometer (SDMT) have been increasingly used worldwide in over-water projects, mainly nearshore with limited water depth (maximum 50 m). The limitation for deep DMT testing is due to the need of a pneumatic cable, which ... Moreis necessary to supply the pressure from a gas tank at the surface down to the blade at depth. The first part of this article presents the available experience of DMT and SDMT testing nearshore using the traditional pneumatic equipment. In the second part of this article, the recently developed Medusa DMT is described. This device is a self-contained cableless probe that is able to autonomously perform dilatometer tests up to a maximum pressure of 25 MPa. Hydraulic pressurization is achieved with a motorized syringe, enabling volumetric control during membrane expansion. Initially conceived only for offshore testing, the Medusa DMT also provides higher quality dilatometer data onshore, with the possibility of additional measurements not feasible with the traditional pneumatic equipment.
Related Products
Studio Prof. Marchetti's Seismic Dilatometer (SDMT) Monolithic Blade Set contains all the necessary components for dilatometer and seismic dilatometer testing (S-wave) down to over 50m of soil depth. The equipment includes: Two blades One true interval seismic probe connected monolithically to a dummy cone tip ... More

Control Unit for automatic logging of DMT readings and for seismic data acquisition (latest edition)

Pneumatic-electric cables

Membranes

Calibration equipment

Seismic shear beam for S-wave generation

Auxiliary components, adaptors and software

Adequate set of spare parts for rapid replacement in case of damage and/or wear

Training in Rome included
Contact Us
Phone
+39 6 30311240