The DYWIDAG GEWI ® Pile is a drilled micropile with a steel core made of GEWI ® Bar with hot-rolled, continuous thread deformations on both sides, the coarse GEWI ® Thread. The steel core is sheathed by cement grout which acts both as corrosion protection and load transfer into the soil or rock.

GEWI ® Pile

Advantages and Characteristics

  • robust coarse thread remains threadable even when dirty or damaged
  • can be cut off and spliced at any given point
  • excellent load transfer into concrete structures by means of anchoring elements
  • a small drill hole diameter allows economic drilling equipment
  • tensile, compression and alternating loads can be transferred to the same extent
  • the coarse GEWI ® Thread guarantees maximum bond between steel and cement grout
  • the stress-strain curve of the GEWI ® Bar shows high ductility
  • continuing settlements can be stopped by preloaded GEWI ® Piles
  • load transfer into the soil is optimized by the post-grouting system
  • Double Corrosion Protected Piles can be used in aggressive media such as seawater or water leaking from dump sites

GEWI ® Pile with single corrosion protection                                       GEWI ® Pile with double corrosion protection

1- additional reinforcement for compression pile
2- end-anchorage with lock nut
3- pile neck reinforcment
4- spacer
5- coupler
6- GEWI ® bar
1- nut with plate and lock nut
2- additional reinforcement for tension pile
3- corrugated sheathing
4- spacer
5- cement grout

GEWI ® Pile and GEWI ® Plus Pile

 nom. diametersteel gradecross sectional areayield loadultimate load
 [mm][N/mm2][mm2][kN][kN]
GEWI ® bar
with left-hand thread		32500/550804402442
40500/5501.257628691
50500/5501.9639821.080
63,5555/7003.1671.7582.217
GEWI ® Plus bar
with right-hand thread		28670/800616413493
30670/800707474565
35670/800962645770
43670/8001.4529731.162
57,5670/8002.5971.7402.077
63,5670/8003.1672.1222.534

GEWI ® Multi Bar Pile

diametercross sectional areaload at yieldultimate load
[mm][mm2][kN][kN]
3 x 32241212061327
1 x 40. 1 x 50322016101771
3 x 40377018852074
2 x 50392719632160
2 x 40. 1 x 50447722382462
1 x 40. 2 x 50518425922851
3 x 50589029453240