What does a CCTV drainage survey involve?
CCTV drainage surveys utilise advanced cameras and equipment to delve into the intricate network of pipes beneath the surface. This examination will provide insights into the condition of the drains, identifying potential issues before they escalate into bigger problems.
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The CCTV Survey Process
The first step involves the insertion of the CCTV camera into the drain system. This camera, attached to a flexible cable, becomes the eyes of the operation. Its high-resolution lenses and adjustable lighting enable it to capture a real-time visual feed, showing the condition of the pipes below.
As the camera makes its way through the pipes, the operator guides its movement systematically. During the survey, common issues such as blockages, tree root intrusions, cracks, or collapsed sections are identified. The high-resolution camera is capable of capturing even the smallest details, providing a precise diagnosis of the drain’s condition.
Equipment Used
1. Access Rods
These flexible rods are employed to push the camera through pipes, adeptly navigating bends and corners. Their flexibility allows them to handle the twists and turns of the drainage system effectively.
2. Crawlers
Designed for pipes with diameters ranging from 150-200mm, crawlers serve as remote-controlled devices for inspection purposes. These devices transport cameras to targeted areas within the drain, ensuring a thorough examination.
3. Sonar Units
Similar to cameras, sonar units are essential components in drainage inspection. The scanning unit integrates a pressure-balanced transducer, accompanied by pitch and roll sensors that determine the unit’s orientation. The collected data is transmitted to a connected laptop, and specialised software is utilised for detailed analysis. A notable advantage of sonar units is their ability to survey pipes without the need for drainage.
