Tunnel Boring Machine Shove Bracket Lifting System

For the tunnel boring machine (TBM) to be launched within the SCL Chamber a shove frame was required to act as a reaction frame to start the drive.

The design of the TBM shoving system require BMB to think of a handling system for the operative to lift up heavy duty brackets weighing approx. 400kg each. The shoving system was a similar design proven on other projects but the lifting operations were always difficult. The installation of each bracket required some innovative thinking on how the brackets were to be bolted to the SCL lining.

To resolve this problem, the shove brackets were lifted into position by combining winches and pulleys in the crown of the tunnel. The brackets were attached to a handling frame during the installation phase so that the handling frame placed the shove bracket into its final position.

It shows that the use of a mechanical mechanism can provide clear benefits in reducing heavy lifting and difficult scenarios during certain activities. The operatives were able to install the 400kg brackets safely and precisely into position within tolerance.

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Monitor report. BMB Tideway. London. October 2019.

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