The size and depth of the basement excavation required to facilitate a development of this nature raised concerns over pile and ground movement surrounding the site. The specialist engineering team at Plowman Craven was able to provide a mixed automated and manual monitoring solution to meet the engineer’s specification.

Working with the project engineers, we were able to offer a best-value solution, providing high-frequency automated monitoring in critical areas of the secant wall, and manual inclinometers read less frequently in lower risk areas. Data from the inclinometers was available to stakeholders via web-based software, and alarm criteria set as an early warning.

The deformation of the secant wall beyond design parameters would indicate possible damage to structures bordering the site perimeter. As a secondary monitoring system, precise levelling points and 3D monitoring targets were installed in the roadway and on structures surrounding the site.