Germany - Bad Kissingen

Participants
Owner:   Zweckverband Gewerbepark A 71 Oerlenbach / Poppenhausen Schulstr. 8, 97714 Oerlenbach
Client: August Ullrich GmbH, 97725 Elfershausen
Contractor: BFT Bohr- und Frästechnik GmbH, Schulweg 1, 97633 Saal
Tender documents
Job Site: Site developement Gewerbepark A 71 Oerlenbach / Poppenhausen part of the job trenchless installation of a water supplying line planed as GGG DN 200 beneath the St 2445 road (formerly known as B 19)
Description of Job: 26 m pipe jacking with steel pipes DN 500 (508 x 11mm S235 and PE-coating) and installation of water supplier lines made out of GGG DN 200 on slide skids, planned grade: 0,24 %, planned to install with micro tunnelling and slurry soil transportation as described in 6.1.3.1.3 DWA A 125
Alternative BFT: Guided auger boring with Front Steer technique and steel pipes DN 600 (610 x 10mm S 355) and installation of the water supplying line made out of GGG DN 200 200 on slide skids, planned grade: 0,24 %
Depth of Coverage: 2,5 bis 3,0 m
Driving Length: 27,5 m
Accuracy: deviation Front Steer 1 cm vertical to the top and 2 cm horizontal to the right
Time for Job: due to the bad weather conditions (temperatures beneath -5 °C and heavy snowfall) 8,5 days, time for jacking including time for welding: 5,5 days maximum jacking perfomance: 9 m per day
Ground conditions
Described Ground: LNW2-LN2 (medium dense non binding soil up to more than 15% fines smaller than 0,063mm), S1-S2 (boulders and cobbles from 63mm up to 200mm more than 30% of the ground volume) base price, extra pay for: S3 (boulders up to 630 mm and less than 30% in total), FD2 (Rock with uniaxial strength from 20 up to 50 MPa and spacing between the parting planes bigger than 10 cm), FD3 (Rock with uniaxial strength from 50 up to 100 MPa and spacing between the parting planes bigger than 10 cm)
Ground Report: weathering debris (LNW2 LN2, S1-S2, and in deeper ground S3), lime stone, claystone and marlstone FD2 possibly even FD3
Encountered Soils: brickearth with stones and cobbles, limestone, claystone and marlstone: soil classification LBM3 (cohesive ground like clay), S4 (boulders up to 630 mm more than 30 % of the ground volume) , FZ1-2 (rock up to 50 MPa uniaxial compressive strength, spacing between the parting planes smaller than 10 cm), and FD1-2 (rock up to 50 MPa uniaxial compressive strength, spacing between the parting planes bigger than 10 cm), see photos
About Image
About Image
About Image
About Image

Bohrtec Gesellschaft für Bohrtechnologie mbH
Konrad-Zuse-Straße 24
D - 52477 Alsdorf
+49 (0) 2404 9881 - 0
+49 (0) 2404 9881 - 10
info