Compaction Grouting Works Start In Marmaray Project

Marmaray Rail Tube Tunnel and Commuter Rail Mass Transit System in Istanbul, one of the most important infrastructure projects in the world. The Project provides an upgrading of the commuter rail system in Istanbul, connecting Halkalı on the European side with Gebze on the Asian side with an uninterrupted, modern, high-capacity commuter rail system.

After previous study that included seismic and mechanical drillings, compaction-grouting works had been planned in an area of 461m x 19m on immersed tube tunnel line. A specially equipped sea platform will make over 3200 drillings up to 25m on seabed. Special equipments will pump cement in those bore holes and improve replacement ratio of soil where immersed tube tunnel members will be located.

In this part of the project, there will be no dredging on the seabed. The special equipment and construction methods will prevent any direct cement spillage. No chemical additives that may harm the environment will be used as well.

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