Excavation pits & pile foundations

FRANKIPILES used for residential development in Frankfurt/Main

Currently under construction at Europaallee 101-103 is the centrepiece
of Frankfurt's new Europaviertel district: the PRAEDIUM residential
tower of developer Nassauische Heimstätte, comprising 19 storeys plus basement car park. The building was designed by distinguished architectural practice Dietz-Joppien.

Cut-off wall with pre-cast concrete units once again delivers prime solution
The first step in constructing the below-ground levels and car park was
to excavate the basement pit. NH ProjektStadt GmbH, a subsidiary of developer Nassauische Heimstätte, contracted FRANKI to perform the works. These embraced the construction of tied-back retaining walls,
the entire earthworks package, the installation of large-diameter bored piles for the piled raft foundation and the placement of a blinding layer. Around the pit perimeter, FRANKI installed a cut-off wall incorporating precast reinforced-concrete units. This same solution had been successfully adopted in 2012 for the Le Quartier Parigot scheme just
200 m from the PRAEDIUM site. Here too, FRANKI carried the cut-off
wall down to the impervious "Landschneckenmergel" ("land snail marl") strata. FRANKI started work in October by checking the site for the presence of explosive ordnance. In November, the team prepared the
site for the cut-off wall installation. FRANKI completed the cut-off wall in February 2015.
Over the Easter holidays, the site team lowered the groundwater level
in the pit in order to test for leakages. As FRANKI had predicted, the finished excavation was largely watertight with only minor water ingress. FRANKI handed over the entire pit to the client at the end of May 2015. The foundation-stone-laying ceremony for the project followed in July 2015.

Contract works:
2.200 m² cut-off wall, d = 60 cm
75 inserted precastconcrete units
36 bored piles, d = 120cm, L ≤ 14,0 m
195 temporary strand anchors, Zk ≤ 450 kN, L ≤ 14,0 m
Site investigations for explosive ordinance
25.000 m³ excavation
1.000 m² blinding layer

Would you like to know more?
Project manager: Karim El Moustaphaoui
Tel.: 06102 367369-11

Frankipfahl im WohngebietFrankipfahl im Wohngebiet

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