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Excavation / Construction
What Is Pipe Bursting?
Replacement of the host pipe by fragmenting the existing pipe and installing a new pipe of equal or larger diameter in it's place.
Pipe Bursting
Pipe bursting and related techniques are well-established methods for trench-less replacement of worn out and undersized gas, water or sewer pipelines. They can offer significant potential savings and drastically reduced surface disruption to public and private utility owners under favorable conditions. The methods result in an existing pipe being replaced size-forsize or up-sized with a new pipe in the same location.
The techniques are most advantageous in cost terms:
(1) when there are few lateral
(2) when the old pipe is structurally deteriorated
(3) when additional capacity is needed
(4) when restoration/environmental mitigation requirements are burdensome
Range Of Applications
Pipe bursting can be applied on a wide range of pipe sizes and types, in a variety of soil and site conditions.
The size of pipes being burst typically ranges from 2 to 36 inches, although it can be even larger. The most common pipe bursting is size-for-size, or upsizing the diameter of the existing pipe up to two sizes (e.g. 8-inch to 10-inch) under normal circumstances & up to 3 sizes in special circumstances.
With respect to the type of existing pipe, the pipes suitable for pipe bursting are typically made of brittle materials, such as verified clay, cast iron, plain concrete, asbestos, or some plastics. Reinforced concrete pipe (RCP) can also be successfully replaced, if it is not heavily reinforce, or if it is substantially deteriorated. Ductile iron and steel pipes are not suitable for pipe bursting, but can be replaced using pipe splitting.
The bursting length is usually between 300 and 400 feet, which is a typical distance between sewer manholes.
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