At CGL, our expert team understands the critical role that preliminary screening plays in site assessment and its impact on decision-making. 

Our Observational Method Services 

CGL has significant experience in applying the Observational Method to assist clients and allow value engineering of bulk excavations for basements, as well as tailoring retaining wall support solutions to control movements in the most advantageous ways both to construction programs and third-party requirements.  

CGL has also applied the methodology to protect sources of drinking water abstraction from the impact of nearby piling operations in response to concerns expressed by the Environment Agency.

Observational Method Processes

Using a familiar traffic light solution, we have set criteria for the successful excavation of a number of bulk basements dig operations in chalk, using face mapping to inform construction staff of what to expect.

The observational method approach involved continuous monitoring by informed staff to achieve safe excavations and has made considerable cost savings over alternative solutions.

Complex Project Industry Leaders

As well as CGL’s expertise in observational method procedures, our team are familiar withground movement analyses of various complexities to develop the wall and building movement criteria to be monitored during construction, as well as setting interventions at the various thresholds embodied within the methodology.

CGL applied these principles to monitor abstracted water with the inclusion of turbidity criteria to safeguard supplies during piling operations in chalk in East London. The approach allowed the successful construction of deep foundations in a sensitive location without which the development would have not progressed.

Why Choose CGL For Observational Method Services?

At CGL, our expert team provides an exceptional and innovative approach to observational method services. We understand the critical role that preliminary screening plays in site assessment and its impact on decision-making. 

Using our exceptional observational method procedures, we have successfully ensured that construction schedules and third-party requirements are met with accuracy and efficiency. Our team is committed to innovation and our industry-leading experience has led to our involvement in complex projects across the UK.