Monitoring of cutting tools in TBM S
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1 Monitoring of cutting tools in TBM S Thomas Edelmann Herrenknecht AG Tunnelbauforschung in Leoben, Schwanau und Bochum Workshop am, Ruhr Universität Bochum)
2 CONTENT A. Introduction B. Cutting tools C. Monitoring D. Monitoring systems E. Inspection systems F. Cutting tool change G. Summary Page
3 A. INTRODUCTION Monitoring of Softground and Hard rock tools / cutter heads is different Softground TBM: EPB TBM / MIX SHIELD TBM Softground: Wear Rotation Page 3
4 A. INTRODUCTION HARD ROCK TBM: Hard rock: Damages indicated by indirect sensors Cutter load to limit risk Page 4
5 A. INTRODUCTION Cutting tools: Overview of tolls at different cutting wheels: Page 5
6 C. Monitoring What does monitoring mean? Wear detection Cutter discs conditions Online load measuring SG tools with wear detection Hard rock Load measuring of disc cutters Cutter head wear detection. Softground Direct Online wear measuring Softground Page 6 Remote controlled robot in SG Cleaning of cutter head Indirect Indirect Disc cutter wear detection Looking for wear limits Visual inspection Inspection of Cutterhead /tools Indication of tool conditions Looking for load limits, Geotechnical indications Avoid compressed air interventions Informations and reactions
7 D. MONITORING SYSTEMS Soft ground tool monitoring Indication for high wear or damaged tools / cutter head Page 7
8 D. MONITORING SYSTEMS Disc Cutter Rotation Monitoring (DCRM): System structure: Hard rock TBMs Page 8 Hydroshield TBM with accessible cutting wheel
9 D. MONITORING SYSTEMS Disc Cutter Rotation Monitoring (DCRM): Signal transmission on hard rock machines: Emission of radio signals. Signal transmission to the operator cabin. Power supply through rotary coupling. Page 9
10 F. CHANGE Accessible cutter heads: Individual tools are equipped with pressure locks for atmospheric change Page 10 F. Köppl (Herrenknecht AG) International workshop on cutting tool soil interaction (Ruhr Universität Bochum,SFB 837)
11 D. MONITORING SYSTEMS Disc Cutter Load Monitoring (DCLM): System structure: Sensor plates (piezo-resistive) Cutting force Thrust force Page 11
12 D. MONITORING SYSTEMS Disc Cutter Wear Monitoring (DCWM): System structure for Hydroshield TBM with accessible cutterheads: Ultrasonic sensors Page 12 Test rig with bentonite
13 D. MONITORING SYSTEMS Disc Cutter Wear Monitoring (DCWM): Test system measurement results: Sensorabstand v. Schneidring [mm] , , , , , , Messung Nr. Page 13
![Schneidring [mm] 200 160,5 180 160,3 160 140 160,1 120 159,9 100](/docs-images/40/3444318/images/page_13.jpg "159,7 80 159,5 60 550 560 570 580 590 40 20 0 0 100 200 300 400")
14 E. INSPECTION Assisted tool inspection: System structure: Extendible inspection robot in tube garage Assembly of the garage between pressure wall and submerged wall Opening towards the excavation chamber Page 14
15 E. INSPECTION Assisted tool inspection: Application on Hydroshield TBM: Water jet, light & camera Pressure wall Page 15 Endoscope Submerged wall
16 F. CHANGE Assisted & automated cutting tool change: Support structure & manipulator: Page 16
17 G. SUMMARY Hardrock TBM Direct / Indirect monitoring Cutter conditions Online load measuring Hydroshield TBM EPB TBM Existing systems Existing systems DCRM Hard rock DCRM FSP, DCRM SG under development DCLM Prototyp available (see S. Barwart) Online wear measuring manually DCWM Prototyp in validation Visual inspection manually Prototype under development Tool change: Page 17 Assitance system under progress. Status: initial studies. Automated system under progress. Status: initial studies.
18 Thank you for your attention! Page 18
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