Trenchless Techniques Underneath Tottenham High Road
We have successfully installed a timber heading to connect a new development with the mains sewer running underneath Tottenham High Road. Road closures for open cut working in such a crowded environment are just not possible so trenchless techniques are the only option.
The first task was to install a 4m deep shaft just inside the development boundary; this would leave 10m of timber heading to connect a new 150m pipe onto the existing 1050mm Thames Water Trunk Sewer. The connection was made with a saddle by core drilling a circular hole into the sewer pipe and installing a purpose made saddle with flexible couplings.
This traditional method, which has been used since the Roman times, allows new pipes to be connected to the Public Sewer Network with minimal disruption.