DALROD UTILISES BRAWOLINER TO COMPLETE A CHALLENGING RENOVATION PROJECT NEAR ELY CATHEDRAL

The problem was that some 5 years ago pipeline survey works highlighted that ground movement has caused deterioration and cracking in sewers the vicinity of the cathedral, with the situation being carefully monitored by DALROD since. A more recent survey indicated that the sewers were now in need of relining, which is normally a straightforward procedure for the DALROD team. However, in this instance, one particular 225 mm (9 in) diameter sewer system, which was approximately 2.8 to 3.0 metres deep, had particularly difficult access problems. The access was tricky for various reasons including that the pipeline runs below a terrace of pre-war-built houses with no rodable access points from most of the lateral connections as well as poor access to most of the gardens of each individual property which made it difficult to reopen the lateral connections subsequent to the main line lining work. In addition to the access difficulties, most of the properties comprised 3-storey buildings that had live systems which could not be shut down adding to the general operational difficulties. All of this meant that Dal Rod had to reline the sewers whilst the system was live and over-pump where flows required it to make sure that no flooding occurred in the basements of any of the 3-storey buildings during the works. This was clearly a case for a trenchless lining or 'no-dig' solution. Having examined the options it was decided that Brawoliner was best suited to the work, a system which the DALROD team had previously utilised on similar jobs.
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INSTALLATION SUCCESS FOR NEW BRAWOLINER® CONTRACTOR

Cambridgeshire-based drainage contractor Dal-Rod Cambridgeshire recently undertook its first ever lining operation with the BRAWOLINER® system on a project in Epping Forrest. Working for managing contractor AMEC, the project was required to renovate drains at the Epping Forest college campus. The local authority required rehabilitation of the sewer, which runs under a main highway between the college and a public walk way, to be completed using Brawoliner® as a preferred method of repair. The majority of the pipes comprised 225 mm or 150 mm diameter pipes which were suffering from numerous cracks, joint displacements and fibrous root intrusions, as well as egress & ingress of sewer and ground water flows.
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