Definition - What does Bursting Head mean?
A bursting head is a device attached to a pulling machine used for pipe bursting, a trenchless method for rehabilitation of pipes. The bursting head is conical in shape with a base diameter 50-100 mm larger than the new pipe. As the bursting head progresses, the new pipe is installed. Pipe bursting can be used to replace brittle pipes that are past their service life and can also be used to up-size the capacity of an existing pipe.
Trenchlesspedia explains Bursting Head
A bursting head is conical in shape to allow it to gain easy entrance into the host pipe. The bursting head is launched from the launching manhole and is pulled through the host pipe from the reception manhole by mechanical means. The geometry of the bursting head radially expands the host pipe by exceeding its tensile and shear strength capacities.
As the bursting head progresses, it fragments the host pipe and pushes the pieces into the surrounding soil while creating space for the new pipe to that is being pulled simultaneously behind the bursting head.