Paris house connection holes from tunnels

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Client	Valentine
Contractor	Zehnder
Location and location of the construction site	Paris, Rue Paul-Hochard
Brief description of the building task	9 holes for house connections made of 1,800 mm collector, diameter of the holes 244 mm, length up to approx. 9.5 m, final pipe PP 200 mm
Client's service description	Drilling in marl, partly under groundwater
Special suggestions from the contractor	BM150DT with screw tubes, normal drill head and down-the-hole hammer for any stones
Description of the soil in the soil survey	In groundwater 2 m, marl, clay and limestone
Ground encountered	Marl, clay, gravel and limestone, partly in groundwater
Tunnelling depths	10 m overburden
Accuracy vertically and horizontally	0,01
Execution time and rate of advance	6 weeks with all relocation work
Tunnelling length	Max. 9.5 m
Particularities	Drilling under busy road

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