Move to Green Offices by Sarens
Sarens installs solar panels at Headquarters in Belgium
The Sarens Crew performs meticulous operation to move machine piece by piece. Photograph – Sarens
Date 10 December 2018
Sarens has been involved in a tunnel boring operation in Den Haag, Netherlands, on behalf of client Combinatie Rotterdamsebaan to relieve the traffic congestion experienced in the city.
A new road is being built directly connecting the centre of Den Haag with a motorway junction outside of the city. Part of this new road consists of two parallel tunnels each 1,860m long, of which about 1,640m was made using a tunnel bore machine, TBM. The tunnel has been given the name Victory Boogie Woogietunnel.
The operation involving Sarens has three distinct phases:
Sarens recently completed Phase 2 of the project, which involved transferring the TBM back to the launch shaft after the first tunnel had been bored. To do this, Sarens had to first disassemble the TBM, transport it piece by piece, and then reassemble it so that it could bore a second tunnel.
This operation came with very particular challenges, however. For example, the last part of the TBM to be disassembled was also the first part required for reassembly. The team had to carefully plan the entire transfer operation so as to minimise downtime.
Furthermore, while most of the TBM parts could undergo normal road transport, six parts had to be specially transferred by SPMT and barge due to their weight and dimension. These shield parts measured approximately 8,4 x 8,4m with a 130t main drive and, most notably, a 115t cutting wheel with an 11,8m diameter.
The cutting wheel could not be transported horizontally because both roads and bridges were too narrow to accommodate its size. To address this issue, Sarens created a support that allowed for vertical transport. The crew fixed the support to the cutting wheel so it could be lifted in one piece during transfer from the SPMTs to the barge, and then back to the SPMTs again.
The barge made three trips along the canal to transport each of the parts, docking next to where a 700T crane was waiting on a public road. The crane then transferred each of the parts from the barge to the SPMTs for onward transport.
For this transfer operation, Sarens used the following equipment:
All the TBM parts were transferred over the course of two nights, as the 700t crane had to be removed during the daytime to accommodate traffic on the public road. Additionally, the crawler crane used for disassembly had to be demobilised, transported, and remobilised at the reception shaft so it could assist with the TBM’s reassembly.
Sarens would like to commend the 24 crew members who helped make this phase of the operation a success. As Sjoerd Briggeman, Account Manager, Engineering/Projecten notes, “During the key moment of the execution, hundreds of people gathered to see our personnel and equipment in action, reminding us how special our work actually is.”
This is a link to the webcam covering the ongoing construction work on the tunnel.
The ‘out of city’ end of the Victory Boogie Woogietunnel as envisaged by Combinatie Rotterdamsebaan