Geotechnical Instrumentation for Landslide Monitoring

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GEOTECHNICAL INSTRUMENTATION FOR LANDSLIDE MONITORING M. Melih Demirkan, Ph.D., P.E. RELIABLE INSTRUMENTATION & DATA MONITORING SOLUTIONS GEOTECHNICAL | GEODETIC | STRUCTURAL | ENVIRONMENTAL TYPICAL INSTRUMENTATION SCHEME – LANDSLIDE • Magnitude • Direction • Rate • Depth WHY? . WHY MONITORING? • OBSERVE ANY CHANGE • KNOW THE STATE OF THE SYSTEM • SAFETY AND PERFORMANCE . WHY VIBRATING WIRE? • DURABLE (MATERIAL, ASSEMBLY, CABLE, SEAL) • LONG TERM STABILITY –NO DRIFT • FREQUENCY OUTPUT - TRANSMIT OVER LONG DISTANCE • REAL TIME MONITORING GROUNDWATER LEVELS Vibrating wire piezometers, standpipe piezometers and automatic water level monitoring systems were installed around deep excavations-stations and shafts, adjacent to TBM bored tunnels to monitor change in groundwater pressure and level due to construction activities VW piezometer model EPP-30V (top left), EPP-40V (right) < Readout unit model EDI-51V < Automatic Water Level Monitoring System DISPLACEMENT, DEFORMATION . VIBRATING WIRE DISPLACEMENT TRANSDUCERS . LINEAR CRACK & JOINT METERS- ELECTRONIC & MECHANICAL . 3D CRACK METERS - ELECTRONIC & MECHANICAL DISPLACEMENT SENSOR CRACK METER IN-PLACE INCLINOMETERS Dasenbrock et. al. 2011 MPBX EXTENSOMETER Multi (three) Point Borehole extensometers were installed above bored tunnel alignments to monitor subsurface ground settlement at anchor depths using digital depth micro meter. Reference plate at the head of the MPBX were also surveyed using precise levelling methods MPBX model EDS-63-U/D and Digital Depth Micro meter DIGITAL INCLINOMETER THE IN-HOUSE DEVELOPED SOFTWARE THRU MOBILE PHONE DATALOGGER COMPACT SDI-INTERFACE DATALOGGER WITH INTEGRAL GSM/GPRS MODEM AUTOMATED MONITORING SYSTEM • AUTOMATED ROBOTIC TOTAL STATIONS USING TERRAMOVE SOFTWARE, TERRAMOVE CONTROL BOX. • HIGH MEASUREMENTS DENSITY, SIMULTANEOUS WIRELESS TRANSMISSION • CONTROLLED REMOTELY FROM ANYWHERE. DATABASE MANAGEMENT SYSTEMS Easy access to meaningful instrumentation data Enhanced graphical and numerical presentation Instant alerts via SMS or email to authorized personnel Fast access to different sensor data on one screen Create diagrams from any combination of parameters Multiple authorized users at different locations Simultaneous interactions of users Low operational cost User friendly on tablets and smartphones WEB BASED DATA MANAGEMENT HTTP://122.15.209.75:50015/DEMOWDMS/WEBDATALOGIN HTTPS://TERRAWEB.IQSOFT.XYZ/ MOVEMENT FROM INCLINOMETER DATA Deformation (mm) 10.0 36.0 -10.0 -8.0 -6.0 -4.0 -2.0 0.0 2.0 4.0 6.0 8.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0 30.0 32.0 34.0 38.0 40.0 42.0 44.0 46.0 48.0 50.0 52.0 54.0 6.5 5.5 4.5 3.5 2.5 1.5 0.5 -0.5 -1.5 ) -2.5 -3.5 DMD -4.5 -5.5 -6.5 -7.5 -8.5 (m Elevation -9.5 -10.5 -11.5 -12.5 -13.5 -14.5 -15.5 -16.5 -17.5 -18.5 -19.5 -20.5 -21.5 -22.5 VERTICAL INCLINOMETER-02 COMBINED GRAPH-INCLINOMETER & PIEZOMETER thank you [email protected] RITE GEOSYSTEMS INC. 1653 McFarland Rd., Pittsburgh PA 15216 +1 (412) 745 8300 www.ritegeosystems.com .

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