It is offered to use a wedged dilatometer for definition of the module of dynamic deformation
(elasticity module) soils in field conditions. The device realizes method of controllable moving with
the pressure relaxation principle, which is an untraditional approach to a problem of the investigation
of deformation of soil properties. Use of relaxation method in field conditions brings about a very
simple design of the load-applying device in the form of indenter forced into the ground, and the
housing of the indenter feeling specific displacement allows at the same time to register tensions
arising in the ground. Operation experience of wedged dilatometers in various regions in Russia and some CIS countries have already confirmed high serviceability and reliability of dilatometers in
various soil and environmental conditions