EPB Face Conditioning: Where Polymer Foam Ends and SAP Begins
On a 6.4 m earth pressure balance machine cutting through mixed gravel and silty clay, the foam injection ratio had crept from 40 to 65 percent over a month because the belt was slipping and the muck was running off the conveyor. More foam made the muck wetter, not stiffer, and the screw conveyor st…
