Review Note
Last Update: 10/31/2024 01:04 AM
Current Deck: 6250 Questions
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Front
Evaluate how monitoring systems assist in controlling the volume of excavation during TBM operations to ensure ground stability and project success. (5 marks)
Back
Real-Time Pressure Monitoring
- Role: Pressure sensors monitor face support pressure continuously, ensuring that it remains within the safe range to balance earth and groundwater pressures.
- Impact: Real-time data allows immediate adjustments to face pressure and spoil removal, preventing over-excavation and maintaining tunnel face stability in challenging ground.
Volume and Displacement Sensors
- Role: Volume sensors on screw conveyors and displacement sensors at the cutterhead monitor excavation rates, providing accurate data on the volume of material removed.
- Impact: These sensors ensure that excavation volume aligns with design specifications, allowing operators to adjust conveyor speeds as necessary to prevent over-excavation or under-excavation.
Settlement and Ground Movement Monitoring
- Role: Surface and subsurface settlement monitoring tools, like inclinometers and settlement markers, track ground movement near the excavation site.
- Impact: Data on ground movement alerts engineers to any settlement or displacement caused by excavation, enabling prompt response to volume control issues that could destabilize the surrounding ground.
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