trail trenches
Trial trenches: precise
verification of cables and pipes
Although TerraCarta has advanced detection techniques, test trenches remain a reliable method for locating and verifying cables and pipes in the subsurface. These trenches are often dug manually, but for longer trenches we use excavators. Our survey crews are fully equipped with the appropriate excavation equipment, and we always provide the necessary permits and notifications when required. Once the trench is dug and the survey conducted, the trench is carefully compacted and the pavement neatly restored. We document the original situation with photographs, as well as the condition in which we leave the site.
curious about the possibilities?
Tailored trial trenches
for clients
In addition to digging trial trenches for our own projects, we also carry out assignments for external clients. Here we go a step further by recording the trench land surveying. The length of the trench and the findings are digitally stored and analyzed. An innovative addition is our use of photogrammetry, with which we create 3D models and orthophotos. This immediately reveals whether the data in the trench match the theoretical information.
Combined trial slot-
and detection research
A combined approach of trial trenching and detection surveys almost always provides a complete picture of underground infrastructure. This result can be represented in 2D maps or 3D environments, with the detection results confirmed by 3D models of the trial trenches.
Trial trenches for
detection and burden of proof
TerraCarta often uses trial trenches as verification of previous detection measurements, to confirm assumptions and thus ensure a better end result. Sometimes trial trenches also serve as evidence, for example to show that a cable is not where it should be according to the KLIC. In such cases, it can be irrefutably proven that the KLIC information is incorrect.
Test holes and
augmented reality
In addition to test trenches, we also use test holes, especially when the exact location and depth of cables and pipes are already known. In some cases, even one tile of lights can be enough to identify a pipe, where we use augmented reality to visualize the exact location of the cable or pipe.
CROW 400:
safety first
When digging trial trenches, we must take into account the regulations surrounding working in contaminated soil, as laid down in CROW Publication 400. TerraCarta is fully familiar with these regulations and can adapt the planning and execution through our TerraCarta Environment department, should this be necessary.
SLIM trial trenching
dig
Thanks to our extensive knowledge, we can strategically deploy test trenches by, for example, making the trench slightly longer when something is detected further away, or reducing the size of the trench based on the measurement results. This increases the efficiency and accuracy of the investigation.