Pipeline surveys for trenchless rehabilitation can be carried out from manholes using remotely operated equipment, some of which are equipped with sensors like radar and sonar to detect cracks, fissures, leaks and corrosion. CCTV cameras are also used for this purpose. Cameras are mounted on crawlers and connected to the operator’s computer. As the equipment traverses along the pipeline, any irregularities observed are noted. This ability to detect problems in pipelines helps prevent pipe failure and reduces the overall cost of repair. Trenchless rehabilitation methods like sliplining, CIPP, pipe bursting, fold and form pipe, and lateral lining may be utilized, depending on the extent of damage.
In trenchless construction, after carrying out a pipeline survey, the data is used to design a cost effective route for laying the new pipeline. Water pipes, sewer pipes, phone cables, TV cables, gas pipes, fuel pipes etc. are just some of the utility lines that run underneath a city. Carrying out installation without prior knowledge of the location of these lines can cause damage and is a safety hazard.