DR - Double Rotary

 
DR DOUBLE ROTARY SYSTEM
 
ENTECO provides piling rigs with double rotary assembly in order to perform CASED CFA PILES. The system consist of a rig equipped with two rotary table connected one to the other to operate simultaneously, where the upper rotary is driving a CFA column and the lower rotary is rotating a column of steel casing. Casing and augers are drilled into the ground at the same time and the two rotary tables are rotating in opposite directions to let the spoil materials flow to the top of the auger string and out of the casing.

The final procedure is similar to standard CFA, where concrete is pumped through the hollow steam of the augers and a steel reinforcement cage is installed after concreting.

The purpose of DR technique compared to standard CFA is to perform CFA method into harder soil layers with presence of obstructions, enhance pile verticality, collect spoiled material in a safe controlled area, without loosing CFA productivity and timing.

Application field:
- Mud, clay and sand, also in very dense formations or harder strata with obstructions
- Possibility to socket into fractured rock
- Secant piles possibility

Features:
- Faster production compared to kelly auger piles
- Collection of spoiled materials into protected areas
- Enhanced verticality control
- No fluids to sustain the pile are required
- No vibrations or noise produced
- Full control of executed pile features by means of electronic devices
- Data recording of the pile and graphic rendering
 
Series/Model Operating Weight
(ton)
Casing rotary torque
(kNm)
Casing stroke
(m)
Casing max dia.
(├śmm)
Auger rotary torque
(kNm)
PDF
E 9070 DR 94 360 19 1000 300
E 9080 DR 94 360 19 1000 320
E 9100 DR 115 400 22 1200 320
E 9140 DR 150 570 29 1500 550
E 7080 DR 94 360 19 1000 300
             


DR
 
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Enteco S.R.L.
P.I. 03015640273

Tel. +39 0421 679977
Fax +39 0421 679993

info@entecodrill.com
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