Green Duba Integrated Solar Combined Cycle Power Plant
Duba ISCC Green Power Plant 1 is a large power infrastructure project located in the northwest of Saudi Arabia, along the Red Sea. The ISCC (Integrated Solar Combined Cycle) technology adds 50 MW of solar power to the gas and steam turbines, generating a total of 500 MW of electricity.
For this project, Dextra supplied Double Corrosion Protection Ground Anchors, used as a permanent anchoring solution for the excavation work preparing the pumping chamber. A total of 264 anchors (Grade 1080/1230, Ø32 & 40 mm) were supplied and installed across four layers.
The Double Corrosion Protection anchors supplied for this project were pre-grouted at the Dextra factory, applying the first layer of grout between the steel bar and HDPE sleeve. The pre-grouted segments were reconnected on-site using couplers. Pre-grouted anchors not only save time and reduce costs during on-site operations, but they also enhance overall anchor quality by ensuring that the first grout layer is applied in a factory-controlled environment.
Installation at site was carried out by foundation contractor BAUER, which performed drilling, lifting, installation, grouting and post-tensioning operations. Dextra offered guidance during the early steps of the installation by sending a team of geotechnical specialists at site.
The general sequence of installation is the following (illustrated in pictures below):
- After unpacking from shipping racks, splicing of segments with couplers, covered by heat shrink sleeves.
- Transportation of assembled anchor from assembly to site to lifting area (13kg per linear meter).
- Wiring cable at the head of anchor to control the descent. Grouting pipe also pre-installed along the anchor.
- Inserting the 30 meters anchor into drilled hole together with grouting pipe.
- After grouting and stressing, a head cap filled with grease is installed on the anchor head, maintain the anchor fully isolated from the corrosive outside environment.
For more information about our excavation and ground solutions in the Middle East, please contact our Dubai office.
