DMT-W3
Generally the flat dilatometer can be pressed into earth by CPT machine, and can also by the hammer of SCPT machine.
DMT can supply the investigator with many important parameters as follows: lateral pressure coefficient Ko , pore water pressure U, untrained shear strength Cu , effective angle of internal friction Φ , coefficient of subgrade reaction Kn, over-consolidation ratio OCR , compression modulus, modulus of elasticity, shear modulus, layer classification, compaction control, unit weight, determination of liquefaction of saturated soil and so on. Generally the flat dilatometer can be pressed into earth by CPT machine, and can also by the hammer of SCPT machine.
The main part of the flat dilatometer consists of a flat stainless thin steel blade with a circular expandable steel membrane of 60 mm diameter on one side. The test involves driving this steel blade into the ground, inflate the steel membrane and measure the corresponding pressure and deformation. Penetration of the steel blade is usually done using common in-situ penetration equipment as for instance those used for Standard Penetration Test. The membrane of the blade is connected to a gas pressure unit on the surface which provide the pressure to inflate the steel membrane.
TECHNICAL PARAMETERS
• Flat blade Length: 230-240mm Width: 95mm Thickness:15mm
• Steel Membrane 60mm
• Rated air pressure 6MPa
• Test Depth 0-50m Special strata can be deepened
• Indicating error ±0.1%F.S
• Test result hole storage quantity can reach 9999 No.
• Uses the rechargeable Lithium batteries, standby time up to 24 hours
