Site Challenges of RM Clayton WRC-PPT Presentation

PPT Presentation

Pdf Summary

The presentation reviews geotechnical and construction challenges at the City of Atlanta’s R.M. Clayton Water Reclamation Center, the city’s largest wastewater treatment plant, with a treatment capacity of 240 million gallons per day. The project had a contract value of $53.5 million and involved Western Summit/Anatek Construction, Brown and Caldwell, and geotechnical teams from Kiewit and Keller.<br /><br />The main topics were site and subsurface conditions, rock excavation, support of excavation (SOE), and underpinning of the headworks. Excavation encountered challenging rock conditions, including a fault that required stabilization. The presentation also documents the SOE systems and work to underpin the existing headworks structure.<br /><br />Key lessons included recognizing the limitations of two-dimensional limit-equilibrium analyses for assessing rock-cut stability and the need for experienced field observations to confirm conditions during excavation. The presenters also highlighted the importance of reliable as-built information, the advantages of a design-build delivery process, and monitoring the performance of underpinned structures during construction. Shotcrete quantities exceeded expectations, underscoring the need to account for potential overruns in planning and estimating.

Keywords

geotechnical

construction

wastewater treatment plant

rock excavation

support of excavation

underpinning

site conditions

fault stabilization

design-build

shotcrete overrun