|A recent project.
BURSTING is the ideal technique to use for the rehabilitation and replacement of utility lines such as gas, water,
sewer, telephone, and power. PIPE BURSTING efficiently bursts clay, concrete, cast iron, and PVC pipe. PIPE BURSTING is the
ideal technique to use for the rehabilitation of ageing utility systems located in congested areas such as municipalities,
city centers, and manufacturing or industrial plants for several reasons. The process involves very little disturbance caused
by open trench excavation. A constant-tension winch guides the pipe bursting tool through the host pipe. The rear expander
displaces host pipe fragments into the surrounding soil, while the tool pulls in the new polyethylene pipe. In addition, this
process generally costs less than the conventional replacement through the open cut method. |
Pilot Tube Micro Tunneling can
be applied for the installation of small diameter pipes which require high accuracy in line and grade. Hence, this method
is appropriate for the installation of small diameter sewer pipelines and water lines. This technique is a combination of
the existing trenchless technologies including auger boring, microtunneling, and horizontal directional drilling. PTMT employs
augers for excavation and soil removal and the jacking system for pushing the pipes similar to auger boring. It uses a theodolite
with camera as the guidance system. The target with LEDs is mounted in the steering head and is monitored through the
TV monitor, which is similar to the guidance system of microtunneling. The operation process of PTMT includes pilot boring
and reaming, which is typical operation for horizontal directional drilling.
is a trenchless method for installation of steel pipes and casings over
distances usually up to 30m (150 ft) up long and up to 1,500mm (60-inches) in diameter, although the method can be used for
much longer and larger installations. The method is the most useful for shallow installations under railway lines and roads,
where other trenchless methods could cause surface settlement or heaving. The majority of installations are horizontal, although
the method can be applied for vertical installations as well.