Do surveys fall under CDM2015?

There’s a common myth that surveys don’t fall under the CDM2015 Regulations. Fifty per cent of that statement is correct. Indeed some surveys do not fall under the CDM2015 Regulations.  A good rule of thumb is that if the ground is broken for the survey, we would need to create a Construction Phase Plan. 

A few common intrusive surveys include Window sampling, and DCP (Dynamic Cone Penetrometer) works. Window sampling involves using a hydraulic hammer to drive cylindrical steel tubes into the ground. The rig is relatively small compared to other larger rigs. This type of rig is suitable to use in environmentally sensitive areas. The tubes are then removed. These will have a sample of material often stratified by the varying conditions of various depths. This sample will be sent to a laboratory where the results can be used in future work, including construction. This information would effectively be called the Pre Construction Information for the incumbent project.

DCP is a very quick and effective way of determining the strength and depth of pavements. The process involves raising and dropping a hammer to drive the cone through the pavement. The extent of the penetration is recorded. Again this information can be correlated in various formats, including California Bearing Ratios, in-situ density, resilient modulus, and bearing capacity. 

Other surveys using tools like the Ground Penetrating Radar wouldn’t need a Construction Phase Plan. However, they would only need the common application of Health and Safety precautions you would expect at many other workplaces.

If you have any doubts about whether your project requires a Construction Phase Plan or even a Notification to the HSE, contact Craig, and I’ll be happy to discuss.