SPECIAL GEOTECHNICAL WORKS FOR METRO CAIRO (EGYPT)-PPT Presentation

PPT Presentation

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Bauer Egypt and BAUER Spezialtiefbau carried out specialist geotechnical works for 18 of the 22 underground stations on Cairo Metro Line 3. The project included approximately 600,000 metres of diaphragm wall and 58,000 metres of silicate gel grout plugs for station excavation pits.<br /><br />The works used diaphragm walls up to 86 metres deep, grout plugs 4.5–10.7 metres thick, and cut-off walls to divide station boxes. Stations were generally built top-down: permanent walls and support elements were installed, grout blankets formed and tested, and excavation proceeded in stages as floor slabs and temporary struts were added. Diaphragm wall construction involved trench cutters and support-fluid systems; permeation grouting used Bauer’s single-valve method.<br /><br />Bauer also rescued a stuck tunnel boring machine using ground freezing. A diaphragm-wall shaft was built near the TBM, freezing pipes were installed and controlled, and the frozen soil enabled the TBM shield to be recovered.<br /><br />Following successful completion of several excavation pits and the wall and grouting works, Bauer was awarded geotechnical works for six additional stations on the planned Metro Line 4. Feasibility studies are also underway for two further metro lines.

Keywords

Bauer Egypt

BAUER Spezialtiefbau

Cairo Metro Line 3

geotechnical works

diaphragm walls

silicate gel grout plugs

top-down construction

tunnel boring machine rescue

ground freezing

Metro Line 4