A13 Improvements
Client: Entreprise and RMG (A13 )Construction JV (this was an Amec /
McAlpine joint venture)
Duration: Jan 2001 to June 2003
Location: A13 from Canning Town to Movers Lane, East London
 
Scope of works:
M&A Roarty Construction was the principle sub-contractor on the
construction of a total of 32 no. sewer diversions and modifications
to facilitate widening and junction improvements of the existing A13
between River Road Barking and Canning Town Roundabout.
This work has been carried out on and around one of the busiest
arterial roads serving East London, working alongside a
number of other contractors carrying out similar diversions to other
utilities.
Major elements of work included:
2100mm diameter surface water sewer diversion.
130m of 2100mm diameter surface water sewer diversion constructed
by pipejack. 3 No. 14m deep 4.00m diameter bolted segmental
caisson shafts.
This work was carried out in difficult ground conditions at 11m depth
at the interphase between sandy gravels overlying clay. Extensive
dewatering required to successfully complete this scheme.
Twin 1500mm diameter gas service ducts
2 No 75m lengths of 1500mm concrete pipes installed by pipejack.
Drives launched from a 7.5 wide x 13.5m long x 10m deep Larsen
sheet and frame shaft.
This drive was carried out across the busy A13 Newham Way / Prince
Regent Lane junction to allow installation of 2 no. 1200mm diameter
high pressure gas mains. Line and level tolerance on these drives was
critical for the subsequent installation of the twin gas mains and was
maintained to within +/- 30mm.
1650mm foul sewer diversion
The installation by open cut of 500m of 1650mm foul sewer at an
average depth of 4.0m within existing carriageway and parkland.
Construction of 7No manholes ranging from 2.4 to 4.0m diameter.
1200mm Pipejack Crossings
Construction of 3 No 1200mm diameter sewers crossing the A13 adjacent
to the Prince Regent Lane diversion. These crossings (ave length 35m)
were each constructed by pipejack from sheet and frame shafts at
approximately 4.0m depth.
Extensive traffic management was required to ensure safe working
around the shafts and each of the drives required establishment
of dewatering systems.
Noel Road Culvert
The relining and strengthening of a 60m length of existing
1600mm wide x 1200mm trapezoidal culvert passing beneath the
A13 in Newham. The existing culvert is constructed with approximately
500mm of cover beneath the carriageway and required upgrading to
meet the new requirements of Transport for London.
Work included cleaning out of existing culvert, scabbling of soffit and
installation and grouting of precast GRP structural liner units.
Northern Outfall Sewer Cloughs
Construction of new cloughs in each of the barrels of the Northern
Outfall Sewer (NOS). The NOS consists of 5No. 2.7m diameter brick
built sewers serving Beckton STW. Installation of the cloughs required
management of major flow diversions within the system to successfully
complete the works.
Barking Reach Rising Main
The installation in 2.5m deep open cut of 600m of 630mm OD MDPE
butt fusion welded rising main and construction of associated
wash out and air release chambers.
This scheme also involved the management of installation of 60m of
600mm ID microtunnel to connect into an existing brick built Trunk
Sewer within the A13 Alfreds Way.
Despite very demanding programming schedules and the complexities
of working in such congested locations, work to date on these contracts
has been successfully completed to the satisfaction of both the client
and TWUL, to programme and to budget
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