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shallow depth and is based on the same operating principle as the BAT/GEON.

*    DMT (dilatometric) tests: the implementation of an application of a down-hole wire-line electronically operated Marchetti’s dilatometer.

*    It is possible to adapt other types of sensors to the cone, i.e. sensors measuring Chemical parameters.

*    From a theoretical and interpretative point of view, the use of the CPTWD in soft soils, together with the MWD, will allow one to correlate, in a morę efficient way, the mechanical characteristics of such soils with the data obtained by diagraphy.

*    With the help of the right interpretative and mathematic models it might be possible to extend correlations which were found for soft soils also to coarse or rocky non penetrable soils.

The futurę improvements of the CPTWD system will include a combination between a drill rig and a pushing system of penetrometric type, possibly anchored in the ground (or to the floating craft in the case of offshore tests) for a higher capacity of pushing. This will allow a better control of the drilling parameters, (Ref. 5) leaving to the drill-rig the uniąue task of rotating the drillstring and injecting the mud.

7 REFERENCES

•    1) Lunne et al. CPT: Cone Penetration Testing in Geotechnical practice

•    2) Fabio Fortunati & Guido Pellegrino: The use of electronics in the management of site imcsligation and soil improvement works: Principles and applications. ISC98, volume 1.

•    3) Kazuo Tani: Importance of instnunented drilling. ISC98, volume 1.

•    4) J. Peuchen : Commercial CPT profiling in soft rocks and hard soils. ISC98, volume 2.

•    5) W:G:B: te Kamp: The influence of the ratę of penetration on the cone resistance qc in sand. ESOPT II. Amsterdam 1982,

•    6) Rolf Larsson: Use of a thin slot as fllter in piezocone tests. CPT 95 Linkoping 1995.

•    7) Kjell Elmgren: Slot type porę pressure CPTu filters. Behaviour of different filling media. CPT 95. Linkoping 1995.

•    8) T.Lunne: In situ testing in offshore geotechnical investigation. In Situ 2001 Bali

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