FLAT DILATOMETER ( DMT)

DMT determines in a quick, precise, simple and economicalway various important parameters used in geotechnical design. The results are highly repeatable and independent from the operator. The blade is advanced in the soil by pushing the rods with penetrometers or drill rigs, or a variety of field machines. In this way boreholesand sample disturbance areavoided. The measurements are carried out directly on the in situ soil. The results are immediately available in a report format, containing graphs and tabular outputs. The DMT is used in 50 countries. It is standardized in the ASTM( USA) norms and in the Eurocode. The equipment and test procedure are described in detail in the Report ISSMGE Committee TC16 ( 2001) , downloadable from the website. APPLICATIONS - Settlements prediction - Operative modulus M - Undrained shear strength Cu - Soil Type ( sand, silt, clay) - Compaction control - Detection of slip surfaces in slopes - P-y curves for laterally loaded piles - Liquefaction potential - Coefficient of consolidation and permeability ( clays) - phiin sands - OCR and Ko in clays - Subgrade reaction modulus for diaphragm walls - Choice of Input parameters for Plaxis - Subgrade reaction modulus for pavements DMT FLAT DILATOMETER 1 set Two high strength DMT blades One dual gage control unit 100m of pneumatic-electric cable 20 high strength membranes Calibration equipment ( syringe and short calibration cable) Auxiliary Components ( tool box, adaptors, spare parts and consumable items) One top slotted ( for cable exit) adaptor to 36mm rods with traditional CPT conical thread Two lower adaptors for connecting DMT blade to 36mm rods with traditional CPT conical thread Software SDMT Elab: input and processing of DMT data, graphs and printouts in Word and Excel DMT Dissip: input and processing of DMT-A Dissipation test, graphs and printouts in Word Settlement DMT ( SDMT) : software for settlement prediction using DMT data ( SO: DOS) Pressure regulator for nitrogen gas tank 1 pc Torpedo for perfoming tests with drill rig instead of common 1 pc penetrometer, composed of 3 elements: ( 1) Upper adaptor with protective channelled collar and passage for cable exit, fit for 76 mm drilling rods ( 2) 3x1 m of rods ( 3) Adaptor rods/ DMT Interface box for automatic logging of DMT readings 1 pc