they did the same with the jubilee line excavators and will do the same with the cross rail tbm's
just did an extra 200m branch line drive the tbm down it then cave in the tunnel behind them
and those are worth millions, i guess it's all part of the costs and why things cost so much these days
they did the same with the jubilee line excavators and will do the same with the cross rail tbm's
just did an extra 200m branch line drive the tbm down it then cave in the tunnel behind them
and those are worth millions, i guess it's all part of the costs and why things cost so much these days