Reducing Environmental Impact of Rock Mass Grouting Through Real Time Data Analysis-Video

Video Transcription

Video Summary

The presentation examines how real-time data analysis can reduce the environmental impact of rock-mass grouting, mainly by lowering cement use and associated CO₂ emissions. In Norwegian hard-rock tunnelling, high-pressure grouting helps control water leakage but can exceed the rock’s minor principal stress, causing hydraulic jacking, excessive grout consumption, and grout loss. The Logic Grouting project is developing software that analyzes pressure and flow data during grouting, alerting operators to possible jacking or unusually high consumption so they can pause, reduce pressure, change grout viscosity, or stop. A case study estimated cement production emissions of about 720 kg CO₂-equivalent per tunnel metre using ordinary Portland cement, or 330 kg using microfine cement. The speaker also highlighted the value of geological mapping and measurements while drilling for planning grouting. Real-time monitoring may help reduce costs and emissions while maintaining water-control requirements.

Keywords

real-time data analysis

rock-mass grouting

cement CO2 emissions

hydraulic jacking

Norwegian hard-rock tunnelling