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Infrastructure Development Code

CS-13.6 Pipe Bursting

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Pipe bursting is a method for the replacement of existing fracturable pipes (e.g. earthenware, vitrified clay, cast iron, asbestos cement, unreinforced concrete, PVC).

  1. The minimum specification for pipe bursting shall be as follows:
    1. The manholes at each end of the pipe shall be prepared for bursting by removal of the benching at the two pipe entry points.
    2. If there are no manholes, pits shall be excavated at each end and the pipe to be replaced shall be cut at each end, typically 5m-100 m apart.
    3. A bursting or splitting head shall then be drawn through the pipe, fracturing the old pipe and drawing in the new pipe behind it.
    4.  A maximum of 10mm shall result between the burst pipe and the inserted lever pipe. Any space in excess of the 10mm shall be grouted.
  2. On reaching the reception manhole, the bursting head shall be disconnected and the benching in the two manholes repaired.
  3. Where PVC-U pipes with restrained rubber ring joints are used for bursting, the maximum length of bursting shall be 120m or as recommended by the pipe manufacturer. 
  4. Any bending of the pipes, bursting or tensile loads applied to the pipe during insertion into the bored hole shall not exceed the manufacturers recommendation.

 

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