Permanent Strand Anchors for seismic upgrade of a quay wall
The 900 m long quay wall built by AMCON for the Q-Quem Petrochemical Complex in Mesaieed Industrial City in Qatar was to be anchored down to withstand seismic events.
For this purpose 100, type 12 x 15.7 mm, St 1570/1770 double corrosion protected Permanent DYWIDAG Strand Anchors conforming to German approval, were used. The 40 m long anchors were installed with an inclination of 45 degrees.The free anchor length measured 32 m and the bond length was 8 m.
To minimize cost, the anchor components were delivered loose to the site and there assembled into anchors. For the assembly the following processes were carried out:
cutting the PE-sheathed greased strands, delivered on wooden drums with a length of 2,400 m, to the lengths required,
removing the PE from the bond length of the individual strands,
cleaning the grease off the bond length using the WAP C 1250 device and a special cleaning lance,
assembling the anchors,
installing and grouting the anchors, and 7 day later
testing and stressing the anchors in accordance with BS 8081.
Whereas drilling was carried out from floating platforms, the anchors were installed from the quay using a crane. The project was in particular characterized by an extremely short construction period: Fabrication and installation of the anchors was completed within one month after commencement of the drilling activities in January 2002.The work were completed to the satisfaction of all participants.