Dongah Engineering DESCRIPTION
Contract 937 of Circle Line Stage III covered the construction of River Valley station and associated tunnels.
Technical info: 2 EPB and 2 Slurry Herrenknecht EPB; 1 EPB Robbins; diameter:6.35m; tunnel length: 2x 1650m.
The product MAPECOAT W SP was chosen for the concrete segment protection, since it proved to be resistant to the passage of the TBM tail brushes.
High performance liquid foaming agent, based on
biodegradable anionic surfact