TRENCHLESS PIPE BURSTING

OPEN CUT TRENCH EXCAVATION

Open cut trench excavation is the traditional and most popular method for sewer lateral sewer construction, repair, or replacement. Open cut trench excavation consists of excavating a trench for the manual installation of each “stick” or piece of pipe. This method is usually the least expensive method if the pipe is located under non-pavement areas such as a front or back yard. The open cut trench method involves excavating down to and exposing the existing pipe so that it can be repaired or replaced and then back filled. If the open cut trench excavation is located in a non-pavement area the excavation can be back filled with soil and surface vegetation restored by seed or sod. When the open cut trench excavation is located under pavement the existing pavement must be saw cut and removed, the excavation filled with granular back fill (compacted stone or sand to prevent settlement), and the pavement must be replaced and the end of the pipe repair or replacement.

If a small section of pipe is being replaced a Fernco type coupling is used to provide a water-tight connection to the existing pipe. A Fernco type coupling consists of a rubber sleeve that the pipe fits inside of and is fastened to the pipes using stainless steel bands that wrap around the outside of the sleeve.

Advantages

• Can be less expensive than trenchless methods in non-pavement areas.
• Applicable for collapsed pipe, severely broken pipe, and heavy root blockages.
• Does not require roots or debris to be removed from the pipe.

Disadvantages

• More excavation is required than compared to trenchless methods.
• May require removal of street and sidewalk pavement which increases expense of the repair.

 

CURED-IN-PLACE PIPE LINING

 

A cured-in-place (CIPP) is a trenchless rehabilitation method used to repair existing pipelines. CIPP is a jointless, seamless, pipe-within-a-pipe with the capability to rehabilitate pipes. A resin-saturated felt tube made of polyester is inverterd or pulled into a damaged pipe. It is usually done from the upstream access point usually dug where the lateral exits the home. The liner can be inverted using water or air pressure. Hot water, UV light, ambient cured or steam is used to cure the resin and form a tight-fitting, jointless and corrosion-resistant replacement pipe.

Advantages

• Minimum amount of excavation required.
• May eliminate pavement removal and replacement costs.
• Only requires one access point.
• Jointless pipe that reduces root and water infiltration

Disadvantages

• Can be more expensive than open trench excavation in non-pavement areas.
• Roots and debris must be removed from pipe before installation
• Not applicable for collapsed, severly broken pipe, or heavy root blockages

Call Today for an Estimate – Serving all of Horry & Georgetown Counties. 

 

*******************************************************

Article Credits: http://urbanaillinois.us/sites/default/files/attachments/sewer-lateral-methods.pdf