Contribute data

All of our tools rely on data from past projects donated by our users.

By submtting data from just one project, you are helping to improve the performance and accuracy of our tools. If you have any other data or the form below isn't appropriate for your data, then please do email us directly.

Important fields:

Please enter a project name.
Please select a location.
Please select a project type.
Please select a completion date.
Please enter an internal diameter less than 17m.
Please enter a segment thickness less than 600mm.
Please enter a segment length less than 3m.
Please select the number of segments in a ring
Please select an average geology for the tunnel.

Optional fields:

Please enter a SFRC content than than 0.5%. will check all information submitted against publicly available information before uploading it to our database but please check your entries are as accurate as possible before submitting.