Data Acquisition in TBM tunnelling. Tim and Lars Babendererde, Frank Stahl, Philipp Elsner

Transcription

1 Data Acquisition in TBM tunnelling Tim and Lars Babendererde, Frank Stahl, Philipp Elsner

2 THE 90 S TBM operation the 90 s Documentation and quality control via written documents 2

3 THE 90 S Transfer of information TBM operators were the source for what happened during tunnel excavations. 3

4 THE 90 S Transfer of information 4

5 THE 90 S VS TODAY Significant technology jumps since the 90 s So did the TBMs! 5

6 TODAY TBM control today Live link to site and other offices worldwide Even remote control possible Documentation with specialised computer programs 6

7 TODAY Transfer of information 7

8 TODAY TBM control today Increasing use of mobile applications 8

9 General setup of modern data monitoring 9

10 Data points by TPB type Any outside monitoring comes on top! 10

11 TODAY Project data volume Assumption: 2000 data points (1 TBM plus outside monitoring) Sampling rate 1/10 sec 1/1 sec Data per day 60 MB 600 MB Data per year 21 GB 213 GB Avg. server size 600 GB 1 TB Usability on Multi-TBM or long term projects Possible with standard equipment Might require additional storage capacities! 11

12 TODAY Flood of information Human being incapable of overseeing the information Filtering and sorting required by Graphical processing for better overview Automatic reporting Automatic monitoring and alarming based on pre-set levels Saving of all data for later back-analysis as required 12

13 CASE 1 Machine damage by torque peaks Subway tunnel project in Germany Gear damage 10 sec data sampling showed torque within permissible limit Reset of sampling rate to 1/1 sec showed torque peaks above permissible limit 13

14 CASE 1 Machine damage by torque peaks Subway tunnel project in Germany Cause of damage: safety devise was loosing pre-stress level over time 14

15 CASE 2 Metro Cairo 15

16 CASE 2 Metro Cairo Eyewitness reported collapsed ring 16

17 CASE 2 Metro Cairo TBM data confirmed eyewitness reports TBM data also revealed possible cause 17

18 CASE 2 Metro Cairo

19 CASE 2 Metro Cairo

20 CASE 3 London, C310 Thames Tunnel Construction Crossing the Thames with vertically curved alignment and low cover under constantly changing tidal influence 20

21 CASE 3 London, C310 Thames Tunnel Construction Problem: Face support pressure control with tidal range of 0,5 bar High tide pressure exceeded blowout safety during low tide 21

22 CASE 3 London, C310 Thames Tunnel Construction Solution: Direct face support pressure control via tidal reading and monitoring system Real-time calculation 22

23 CASE 4 Tunnel GASTAU Crossing of the Serra do Mar State Park with tunnel and shafts Shaft Tunnel Refinery Pipeline 23

24 CASE 4 Tunnel GASTAU 5 km straight line tunnel with 3% inclination ~ 550m deep shafts Practically no boring logs for 90% of the tunnel 24

25 CASE 4 Tunnel GASTAU Excavation with double-shield TBM Geological mapping via face mapping (one every one or two days) TBM data used for geotechnical evaluation between face mappings Drilling speed Advance force Torque Penetration rate RPM 25

26 Summary TBM data acquisition has changed significantly in the last 20 years Remote live access to thousands of data points is possible Adequate software support is necessary to manage the flood of information High data rates and many data points are recommended for possibility of back analysis 26

27 Thank you for your attention! Tim and Lars Babendererde, Frank Stahl, Philipp Elsner