Construction—EMEA—Great Britain—Structural Repair Solutions
Quality for long-term Use:
GEWI ® Hangers support Victorian Sewer Pipe System in London
Even today, the sewage system in London still largely consists of the canal system that was conceived
by the engineer Bazalgette in the 1860s in order to free the city from what was known as “the great stink”.
Simultaneously, the new sewage system eliminated the cholera epidemic raging at the time.
As Bazalgette had chosen to build the sewer
pipes more than twice as large as necessary,
the Victorian System continues to transport
the wastewater of a population of 8 million that
is now more than three times as large as it was
at the time the system was built.
The historic sewer network consisted of
1,800km of street sewers that flowed into
132km long main sewers. The main sewers,
which are still intact today, have diameters
100
of up to 3.2m and run parallel, with up to
7 canals running side by side.
In the east of London, the sewer pipes
cross the inland waterways River Lee
and Channel Sea in what is known as the
Northern Outfall Sewer. Here, the sewer
pipes are integrated into Victorian steel and
cast iron bridges spanning the tributaries.
The canal pipes are suspended from
the bridge girders by tie rods that were
badly corroded and had to be replaced.
In conjunction with the design engineer,
DSI Construction Great Britain developed
a solution to replace the existing tie rods
by hangers consisting of GEWI ® Steel.
The 150 28mm Ø GEWI ® Hangers were
supplied in two sections; one of the sections
had a crank, a coupler and a load bearing
hex nut installed in order to anchor the bar
at the girder flange at the top.