Client
CVB JV
Duration
5 months
Location
Rotherhithe London
Project Type
Design & delivery of a watertight secondary lining for the Earl shaft
Internal Diameter
17.05m
Wall Length
54 linear meters with varying wall thickness of 650mm to 3.5m
Shaft Height
42m
Slipform Engineering provided our client, CVB, value engineering solutions, to meet their requirements. This was achieved through close collaboration, design and construction of temporary works structures and Slipforming technologies to deliver a 17.05m diameter, 42m deep watertight secondary lining for the Earls pumping station, forming part of the Thames Tideway development project.
- Shaft consisted of 2050m3 of concrete & 520t of reinforcement.
- Shaft was constructed in 20 consecutive days and average of 2.0m per 10h shift
- Secondary lining included encased in concrete steel vortex tube 2.8m dia & 25m high.
- Erected temporary openings 7m height & 4m in width.
- 2000 linear meters of waterproofing grout tubes installed at 19 CJ`s
- The whole rig was designed to be suspended from 13 stand jack, which were supported on a bespoke grillage structure with 10m high steel column at the top of the outer shaft.
- Grillage were designed to allow large pre-fabricated elements to be installed without any time loss in program.
- 2 adaption were required to complete the project.
- One-Sided Slipform shutter constructed 3.2m high lining wall above ground level special radius temporary works were constructed to support outer RC radius lining.